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PRODID:-//Friends of Friends Hybrid Meeting 2022 - ECPv5.16.3.1//NONSGML v1.0//EN
CALSCALE:GREGORIAN
METHOD:PUBLISH
X-WR-CALNAME:Friends of Friends Hybrid Meeting 2022
X-ORIGINAL-URL:http://fof.oac.uncor.edu/2022
X-WR-CALDESC:Events for Friends of Friends Hybrid Meeting 2022
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BEGIN:VTIMEZONE
TZID:America/Argentina/Cordoba
BEGIN:STANDARD
TZOFFSETFROM:-0300
TZOFFSETTO:-0300
TZNAME:-03
DTSTART:20220101T000000
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END:VTIMEZONE
BEGIN:VEVENT
DTSTART;TZID=America/Argentina/Cordoba:20220418T104500
DTEND;TZID=America/Argentina/Cordoba:20220422T111500
DTSTAMP:20220815T210236
CREATED:20220321T200902Z
LAST-MODIFIED:20220331T203512Z
UID:1106-1650278700-1650626100@fof.oac.uncor.edu
SUMMARY:COFFEE BREAK (mornings)
DESCRIPTION:
URL:http://fof.oac.uncor.edu/2022/event/coffee-break/
LOCATION:Auditorio Mirta Mosconi\, Francisco N de Laprida 854\, X5000BGR Córdoba\, Córdoba\, Argentina\, 5000\, Argentina
ATTACH;FMTTYPE=image/jpeg:http://fof.oac.uncor.edu/2022/wp-content/uploads/sites/6/2022/03/coffee.jpg
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Argentina/Cordoba:20220418T130000
DTEND;TZID=America/Argentina/Cordoba:20220422T143000
DTSTAMP:20220815T210236
CREATED:20220321T201645Z
LAST-MODIFIED:20220331T203635Z
UID:1111-1650286800-1650637800@fof.oac.uncor.edu
SUMMARY:LUNCH BREAK
DESCRIPTION:
URL:http://fof.oac.uncor.edu/2022/event/lunch/
LOCATION:Auditorio Mirta Mosconi\, Francisco N de Laprida 854\, X5000BGR Córdoba\, Córdoba\, Argentina\, 5000\, Argentina
ATTACH;FMTTYPE=image/jpeg:http://fof.oac.uncor.edu/2022/wp-content/uploads/sites/6/2022/03/lunch.jpg
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Argentina/Cordoba:20220418T151500
DTEND;TZID=America/Argentina/Cordoba:20220422T161500
DTSTAMP:20220815T210236
CREATED:20220331T204001Z
LAST-MODIFIED:20220331T204005Z
UID:1593-1650294900-1650644100@fof.oac.uncor.edu
SUMMARY:COFFEE BREAK (afternoons)
DESCRIPTION:
URL:http://fof.oac.uncor.edu/2022/event/coffee-break2/
ATTACH;FMTTYPE=image/jpeg:http://fof.oac.uncor.edu/2022/wp-content/uploads/sites/6/2022/03/coffee.jpg
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Argentina/Cordoba:20220418T210000
DTEND;TZID=America/Argentina/Cordoba:20220422T183000
DTSTAMP:20220815T210236
CREATED:20220325T214641Z
LAST-MODIFIED:20220331T204124Z
UID:1373-1650315600-1650652200@fof.oac.uncor.edu
SUMMARY:Topics
DESCRIPTION:
URL:http://fof.oac.uncor.edu/2022/event/lunch-test/
ATTACH;FMTTYPE=image/png:http://fof.oac.uncor.edu/2022/wp-content/uploads/sites/6/2022/03/topics.png
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Argentina/Cordoba:20220419T090000
DTEND;TZID=America/Argentina/Cordoba:20220419T094500
DTSTAMP:20220815T210236
CREATED:20220321T201223Z
LAST-MODIFIED:20220503T193016Z
UID:1109-1650358800-1650361500@fof.oac.uncor.edu
SUMMARY:CG: The host galaxies of binary compact objects across cosmic time - Artale
DESCRIPTION:In 2015\, the first direct detection of a gravitational wave (GW) by the two ground-based LIGO interferometers opened a new era for gravitational-wave astrophysics. Since then\, more than 90 events have been announced by the LIGO-Virgo-KAGRA collaboration including merging binary black holes (most of them)\, binary neutron stars (BNS)\, and black hole – neutron star binary systems. GW observations will allow us to address an impressive set of questions in cosmology and astrophysics\, such as the nature of dark matter\, the nature of gravity\, the early Universe\, and the different stellar evolution stages currently under debate. In this talk\, I will focus on the properties of the host galaxies where merging compact objects form and merge. Characterizing the host galaxies’ properties of merging compact objects provides essential clues to interpreting current and future GW detections. I will discuss the probability that a galaxy hosts a compact binary coalescence according to its stellar mass and star formation rate. I will show that\, at low redshift\, galaxies with low specific star formation rate (sSFR < 1e-10 yr^-1) contribute significantly to the merger rate density\, while those with high specific star formation rate (sSFR > 1e-10 yr^-1) dominate at z>~1. These results are crucial for low-latency searches of GW sources\, reducing the number of viable host candidates. Finally\, I will discuss the connection between BNS mergers and short gamma-ray burst events and the probability of afterglow detection from GW-triggered BNS mergers.
URL:http://fof.oac.uncor.edu/2022/event/the-host-galaxies-of-binary-compact-objects-across-cosmic-time-artale/
LOCATION:Auditorio Mirta Mosconi\, Francisco N de Laprida 854\, X5000BGR Córdoba\, Córdoba\, Argentina\, 5000\, Argentina
CATEGORIES:Long Talk
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END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Argentina/Cordoba:20220419T094500
DTEND;TZID=America/Argentina/Cordoba:20220419T100000
DTSTAMP:20220815T210236
CREATED:20220325T222506Z
LAST-MODIFIED:20220410T212601Z
UID:1392-1650361500-1650362400@fof.oac.uncor.edu
SUMMARY:CG: Gravastars in f(R\,L) gravity - Vieira G.
DESCRIPTION:Gravastars are exotic compact objects alternative to black holes. In the context of alternative theories of gravity\, they present relevant signatures. Thus\, we shall present the gravastar solutions of a general non-minimal coupling gravity model\, namely f(R\,L) gravity\, where its properties have some bearings. Some cosmological and astrophysical applications shall be analysed.
URL:http://fof.oac.uncor.edu/2022/event/gc-gravastars-in-frl-gravity-vieira-g/
CATEGORIES:Short Talk
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END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Argentina/Cordoba:20220419T100000
DTEND;TZID=America/Argentina/Cordoba:20220419T101500
DTSTAMP:20220815T210236
CREATED:20220325T223827Z
LAST-MODIFIED:20220410T212530Z
UID:1401-1650362400-1650363300@fof.oac.uncor.edu
SUMMARY:CG: The integrated Sachs-Wolfe effect in 4D Einstein-Gauss-Bonnet gravity - Ghodsi Yengejeh
DESCRIPTION:A novel 4-dimensional Einstein-Gauss-Bonnet (4D EGB) gravity has been proposed that asserts to bypass Lovelock’s theorem and to result in a non-trivial contribution to the gravitational dynamics in four-dimensional spacetime. Although inconsistencies have been raised for this theory in nonlinear perturbation limits\, the results of the consistent 4D EGB model indicate that the background equations and the linear scalar modes are in good agreement with the initial 4D EGB model. We study the integrated Sachs-Wolfe (ISW) effect\, as a linear phenomenon\, in the 4D EGB model. For this purpose\, we calculate the evolution of the gravitational potential and the linear growth factor as a function of redshift for the 4D EGB. We also calculate the ISW-auto power spectrum and the ISW-cross power spectrum as functions of cosmic microwave background multipoles for the 4D EGB model.To do this\, we use the strongest constraint on the coupling parameter proposed for the 4D EGB model. Additionally\, to calculate the ISW effect for the 4D EGB model\, we employ three large-scale structure surveys at different wavelengths. The results exhibit that the ISW effect in the 4D EGB model is higher than the one obtained from the $\Lambda$CDM model. Hence\, we show that the 4D EGB model can amplify the amplitude of the ISW power spectrum\, which can be considered as a relative advantage of the 4D EGB model comparing the $\Lambda$CDM one. Also\, we indicate that the deviation from the $\Lambda$CDM model is directly proportional to the value of the dimensionless coupling parameter $\beta$.
URL:http://fof.oac.uncor.edu/2022/event/gc-the-integrated-sachs-wolfe-effect-in-4d-einstein-gauss-bonnet-gravity/
CATEGORIES:Short Talk
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END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Argentina/Cordoba:20220419T101500
DTEND;TZID=America/Argentina/Cordoba:20220419T103000
DTSTAMP:20220815T210236
CREATED:20220325T223637Z
LAST-MODIFIED:20220410T212512Z
UID:1399-1650363300-1650364200@fof.oac.uncor.edu
SUMMARY:CG: Wiener filter for CMB maps using Neural Networks - Costanza
DESCRIPTION:In this work\, we have studied a Convolutional Neural Network (CNN) called WienerNet to apply the Wiener Filter to noisy CMB (Cosmic Microwave Background) maps. We present how these neural networks work and how good the results are compared to the traditional method of Wiener Filter with the conjugate gradient. Also\, we show that the predictions of the neural network are faster and more efficient than the conjugate gradient method\, which is a bottleneck in CMB analyses. For these purposes\, we have applied this neural network to CMB maps with different numbers of pixels\, from 28×28 to 512×512\, to study how the computation time scales with the size of the maps.
URL:http://fof.oac.uncor.edu/2022/event/gc-wiener-filter-for-cmb-maps-using-neural-networks-costanza/
CATEGORIES:Short Talk
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END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Argentina/Cordoba:20220419T111500
DTEND;TZID=America/Argentina/Cordoba:20220419T120000
DTSTAMP:20220815T210236
CREATED:20220325T224632Z
LAST-MODIFIED:20220415T172758Z
UID:1405-1650366900-1650369600@fof.oac.uncor.edu
SUMMARY:CG: NumCosmo halo tools: application to cluster cosmology and cluster mass estimation - Penna Lima V.
DESCRIPTION:Galaxy clusters are important cosmological probes since their abundance and spatial distribution are directly linked to structure formation on large scales. The principal uncertainty source on the cosmological parameter constraints concerns the cluster mass estimation from mass proxies. In addition\, future surveys will provide a large amount of data\, requiring an improvement in the accuracy of other elements used in the construction of cluster likelihoods. Therefore\, accurate modeling of the mass-observable relations and reducing the effect of different systematic errors are fundamental steps for the success of cluster cosmology. In this work\, we present a brief review on that topic\, and also describe some tools implemented in the Numerical Cosmology Library\, and the cross-check with other public libraries.
URL:http://fof.oac.uncor.edu/2022/event/gc-penna-lima-v/
CATEGORIES:Long Talk
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END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Argentina/Cordoba:20220419T120000
DTEND;TZID=America/Argentina/Cordoba:20220419T121500
DTSTAMP:20220815T210236
CREATED:20220325T225201Z
LAST-MODIFIED:20220410T212347Z
UID:1409-1650369600-1650370500@fof.oac.uncor.edu
SUMMARY:CG: Giant HII Regions and HII Galaxies as tracers of the Hubble expansion and its use in cosmology - Fernandez A.
DESCRIPTION:The relationship between the integrated Hβ line luminosity and the velocity dispersion of the ionized gas of HII galaxies (HIIGs) and giant HII regions (GHIIRs) has been known for a long time as the L-σ relation (Terlevich et. al. 1981 and more recently Bordallo & Telles 2011 and Chavez et. al. 2014). The scatter in the relation is small enough that it can be used to determine cosmic distances independently of redshift and represents an interesting distance estimator that\, in principle\, can be used up to redshifts z ∼ 4. Locally it can be used to obtain high precision measurements of the local Hubble parameter. This can be done using a sample of nearby (z ≤ 0.1) HIIGs galaxies and\, crucially\, an anchor sample of GHIIRs in nearby galaxies for which distances via primary indicators are available. I will be presenting our recent results of the use of the L-σ relation to measure the local value of the Hubble constant (Fernández et. al. 2018) and to constrain the Dark Energy equation of State Parameter (w) (González-Morán et. al. 2020\,2021).
URL:http://fof.oac.uncor.edu/2022/event/gc-giant-hii-regions-and-hii-galaxies-as-tracers-of-the-hubble-expansion-and-its-use-in-cosmology-fernandez-a/
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END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Argentina/Cordoba:20220419T121500
DTEND;TZID=America/Argentina/Cordoba:20220419T123000
DTSTAMP:20220815T210236
CREATED:20220326T100214Z
LAST-MODIFIED:20220410T212323Z
UID:1460-1650370500-1650371400@fof.oac.uncor.edu
SUMMARY:CG: Cosmology with baryons: modelling the cosmic matter distribution for Large-Scale Structure analyses - Aricò
DESCRIPTION:In this talk\, we show a framework to consistently model the spatial distribution and time evolution of dark matter\, gas\, and galaxies\, in the Large Scale Structure of the universe. The core of our framework is given by large\, high-resolution N -body simulations\, which ensure robust modelling of non-linearities on small scales\, and accurate predictions on large scales. In a post-processing phase\, we displace the particles in our simulations to explore different cosmological and baryonic scenarios\, by combining two state-of-the-art algorithms: cosmology-rescaling and baryon correction model. We implement extended and optimised versions of these algorithms\, to reach the accuracy required by next-generation surveys\, and we systematically test them\, both separately and jointly. Finally\, we use artificial neural networks\, trained to learn the connections between cosmological and astrophysical parameters and relevant summary statistics of the cosmic matter field\, as measured in our simulations. In this way\, our predictions can be delivered at a negligible computational cost\, and the linear\, nonlinear and baryonic contributions can be computed separately. By using our framework\, the modelling of the cosmic matter field can be extended to unprecedentedly small scales\, in a highly accurate and flexible fashion\, and additionally with a consistent speeding-up in the computational time. We expect that the techniques developed and the results presented here will be useful for a broad range of applications in Large Scale Structure analyses\, and in particular in the exploitation of weak lensing and galaxy surveys.
URL:http://fof.oac.uncor.edu/2022/event/cg-cosmology-with-baryons-modelling-the-cosmic-matter-distribution-for-large-scale-structure-analyses-arico/
CATEGORIES:Short Talk
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END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Argentina/Cordoba:20220419T123000
DTEND;TZID=America/Argentina/Cordoba:20220419T124500
DTSTAMP:20220815T210236
CREATED:20220326T100332Z
LAST-MODIFIED:20220331T180622Z
UID:1462-1650371400-1650372300@fof.oac.uncor.edu
SUMMARY:CG: On dynamo theories for cosmological magnetic fields - Rubio
DESCRIPTION:We present well-posedness results for two particular theories aiming to model large-scale magnetic field amplification. We report on the existence of spurious modes when the electromotive force is linear in the magnetic field\, making the theory unsuitable in the kinematic regime. We then prove that this pathology is actually removed when allowing magnetic field derivatives in such a force. Finally\, we give bounds for the magnetic energy in the force-free regime and generalise some of these results for full non-relativistic MHD.
URL:http://fof.oac.uncor.edu/2022/event/cg-on-dynamo-theories-for-cosmological-magnetic-fields-rubio/
CATEGORIES:Short Talk
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END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Argentina/Cordoba:20220419T124500
DTEND;TZID=America/Argentina/Cordoba:20220419T130000
DTSTAMP:20220815T210236
CREATED:20220325T225615Z
LAST-MODIFIED:20220410T212228Z
UID:1413-1650372300-1650373200@fof.oac.uncor.edu
SUMMARY:CG: Universal renormalization procedure for higher curvature AdS gravity in up to 5 dimensions - Araya
DESCRIPTION:We implement a universal method for renormalizing AdS gravity actions applicable to arbitrary higher curvature theories in up to five dimensions. The renormalization procedure considers the extrinsic counterterm for Einstein-AdS gravity given by the Kounterterms scheme\, but with a theory-dependent coupling constant that is fixed by the requirement of renormalization for the vacuum solution. This method is shown to work for a generic higher curvature gravity with arbitrary couplings except for a zero measure subset\, which includes well-known examples where the asymptotic behavior is modified and the AdS vacua are degenerate\, such as Chern-Simons gravity in 5D\, Conformal Gravity in 4D and New Massive Gravity in 3D.
URL:http://fof.oac.uncor.edu/2022/event/gc-magnetic-field-generation-through-primordial-black-holes-araya/
CATEGORIES:Short Talk
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END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Argentina/Cordoba:20220419T143000
DTEND;TZID=America/Argentina/Cordoba:20220419T163000
DTSTAMP:20220815T210236
CREATED:20220325T225947Z
LAST-MODIFIED:20220410T212156Z
UID:1417-1650378600-1650385800@fof.oac.uncor.edu
SUMMARY:EA: Virtual Workshop -Gravitational Lensing: from Planets to the Large Scale Structure of the Universe - Makler et al.
DESCRIPTION:During the 21st century\, gravitational lensing turned from a curious relativistic effect used by some cosmologists into a mainstream astrophysical tool. Each year we witness new discoveries exploring the different regimes of lensing\, from planets in our galaxy to individual stars in high redshift galaxies\, from the tiny distortions produced by the Large Scale Structure of the Universe to multiple images\, arcs and Einstein rings. Gravitational lensing has proven to be an effective tool to probe the mass distribution in a surprising range of physical scales\, in particular enabling us to “see” dark structures. It is also sensitive to the Dark Energy and unique for probing modifications of general relativity. The “gravitational telescope” effect has enabled the study of distant galaxies that would otherwise not be possible with the current instruments. Nowadays\, most major astrophysical surveys have lensing as one of their main science drivers or at least has impacts on this science. For example\, missions as diverse as Gaia\, Kepler and Spitzer had important implications for gravitational lensing\, whereas the Dark Energy Survey\, the Kilo-Degree Survey and Hyper Suprime Cam were specially designed to probe this phenomenon. In particular\, upcoming missions such as the Vera Rubin Telescope Legacy Survey of Space and Time and the Roman and Euclid space telescopes will allow us to explore at the same time the three most common regimes of gravitational lensing: weak\, strong and micro-lensing.In this mini-workshop we aim to provide a basic introduction to gravitational lensing and its main consequences\, exploring in an interactive way some specific examples of applications. The workshop will be divided into four sessions: a general introduction to lensing followed by each of the three main regimes. In each case\, we will explore practical examples and use simple code to illustrate the results. We will also use publicly available software to carry out more complex applications. The worked examples will be organized as python notebooks that can be run by the participants in real-time. Therefore\, we expect at the same time to cover some theory and background and provide a hands-on experience on specific applications.Workshop facilitators: Martin Makler (organizer)\, Renan Alves\, João França\, Elizabeth Gonzalez\, Eduardo Valadão\, Anibal Varela\,Minimum requirements: Undergraduate level of physics and mathematics should be enough to follow the mini-workshop. Basic knowledge of python is desired\, but not required. Undergraduate knowledge of astronomy is also useful\, but not mandatory.Other information: Participation will be possible in person (preferred\, whenever possible) and remotely. If participants are able to bring their own computers\, they will have a more interactive experience\, though this is not a requirement.
URL:http://fof.oac.uncor.edu/2022/event/ea-makler/
CATEGORIES:Tutorial/Workshop
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END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Argentina/Cordoba:20220419T163000
DTEND;TZID=America/Argentina/Cordoba:20220419T173000
DTSTAMP:20220815T210236
CREATED:20220325T230230Z
LAST-MODIFIED:20220410T212146Z
UID:1420-1650385800-1650389400@fof.oac.uncor.edu
SUMMARY:IT: Virtual Workshop - Data analytics: A journey beyond the evident - Lares
DESCRIPTION:Modern astronomy is a data-intensive science that requires the analysis of large volume archives. An important aspect of understanding the observations is to ask science-driven questions andto look for the answers through the statistical analysis and visualization of data. This data analytics often relies on different procedures of data cleaning\, imputation and encoding.In these hands-on sessions\, we will explore workflows to analyze data and report results.Session 1) Data analysis. Big data and scalability.Session 2) Data reporting. Tools for reproducibility. Experiment registration. Publication ready plots\, visualization tips and tricksMinimum requirements: Basic python and statistics.
URL:http://fof.oac.uncor.edu/2022/event/it-marcelo/
CATEGORIES:Tutorial/Workshop
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END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Argentina/Cordoba:20220419T163000
DTEND;TZID=America/Argentina/Cordoba:20220419T180000
DTSTAMP:20220815T210236
CREATED:20220325T230726Z
LAST-MODIFIED:20220410T212116Z
UID:1424-1650385800-1650391200@fof.oac.uncor.edu
SUMMARY:CG: Virtual Workshop - Extended Mass Distributions of Primordial Black Holes and Primordial Magnetogenesis
DESCRIPTION:This workshop consists of a series of short lectures and hands-on activities on the topic of Primordial Black Holes (PBHs). In particular\, on understanding and computing extended mass functions of PBHs using the Press-Schecter formalism\, understanding how to extend observational constraints on monochromatic mass functions to extended mass functions\, and understanding the possible generation of primordial magnetic fields at the cosmological scales due to the PBH distribution.Each session deals with one of the aforementioned topics such that it starts with a brief lecture which is then supplemented by a hands-on exercise using Python.Objective:The workshop aims to provide practical tools for computing extended mass functions of objects characterized by Gaussian random fields with a power spectrum\, using the Press-Schecter method. It also aims to teach participants how to compute the power spectrum of cosmological magnetic fields generated by discrete objects whose distribution is characterized by a mass function and an overdensity field\, such that each object generates a magnetic field of known form in its vicinity.Lectures and hands-on sessions: 3 sessions of 1 and a half hours. 4 and a half hours in total. \n\n\n\nSession 1: PBHs as DM\, the case for an extended mass distribution.Lecture (20m+10m) – Nelson D. Padilla: Press-schecter PBH mass function and constraints for extended distributions. Poisson power spectra\, modified mass function\, noise effects.Hands-on (60m)- Joaquín Sureda: Computing the PBH mass function starting from the primordial power spectrum. Numerical method for translating monochromatic constraints into constraints for extended mass functions.Session 2: PBHs as a mechanism for magnetogenesis.Lecture (20m+10m)- Ignacio J. Araya: Power-spectrum formalism for magnetic fields and magnetogenesis from PBHs\, two possible mechanisms.Hands-on Session (60m) – Marcelo Rubio: Obtaining the magnetic power spectrum given the DM power spectrum\, the PBH mass function and the magnetic field of a single PBH.Session 3: Press-schecter PBH mass functions from power spectra with enhanced power features.Lecture (20m+10m) – Juan Magaña: The case for log-normal power spectra and the resulting PBH mass function.Hands-on Session (60m): \n\n\n\nMaterials: Notebooks for each participant. Python programming language. Jupyter environment. Wi-fi access.Workshop facilitators:Ignacio J. Araya\, Universidad Arturo Prat\, Iquique – Chile.Juan Magaña\, Pontificia Universidad Católica de Chile\, Santiago – Chile. Nelson D. Padilla\, IATE\, Córdoba – Argentina. Marcelo Rubio\, Institute for Fundamental Physics of the Universe (IFPU-SISSA)\,Trieste – Italy.Joaquín Sureda\, Donostia International Physics Center (DIPC)\, Donostia-SanSebastián – Spain.
URL:http://fof.oac.uncor.edu/2022/event/gc-pbh/
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END:VEVENT
END:VCALENDAR