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PRODID:-//Osservatorio Astrofisico di Catania - ECPv6.14.0//NONSGML v1.0//EN
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X-WR-CALNAME:Osservatorio Astrofisico di Catania
X-ORIGINAL-URL:https://www.oact.inaf.it
X-WR-CALDESC:Eventi per Osservatorio Astrofisico di Catania
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BEGIN:VTIMEZONE
TZID:UTC
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TZOFFSETFROM:+0000
TZOFFSETTO:+0000
TZNAME:UTC
DTSTART:20230101T000000
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BEGIN:VEVENT
DTSTART;TZID=UTC:20260310T113000
DTEND;TZID=UTC:20260310T123000
DTSTAMP:20260502T110845
CREATED:20260309T084132Z
LAST-MODIFIED:20260309T084700Z
UID:19489-1773142200-1773145800@www.oact.inaf.it
SUMMARY:Our Universe in Simulation
DESCRIPTION:Recording: https://www.oact.inaf.it/seminars/ \nDATE: Tuesday\, March 9\, 11:30 a.m. \nORGANIZER: INAF-OACT \nLOCATION: AULA OVEST (INAF-OACT) + remote \nLink for the remote audience:https://meet.google.com/wvf-uwxo-oyj \nSPEAKER: Jia Liu (Kavli IPMU – University of Tokyo) \nABSTRACT:Ongoing and upcoming cosmological surveys—including the Simons Observatory\, LiteBIRD\, Rubin LSST\, Euclid\, DESI\, PSF\, SPHEREx\, and the Roman Space Telescope—will deliver observations of unprecedented precision. Joint analyses across these surveys will be essential for uncovering fundamental physics\, including the nature of inflation\, dark energy\, dark matter\, neutrino mass\, and more. In this talk\, I will discuss the opportunities\, challenges\, and strategies for simulating our universe across multiple wavelengths to realize these goals. \n  \nA few rules:— before joining\, make sure you are using your institutional inaf.it account if you have one (otherwise we will grant you permission to join)— please do not forget to mute your microphone and switch off your webcam when access the virtual room— for questions leave a message in the chat\, the answers at the end of the webinar— the seminar will be recorded\, so if you are interested in it\, please contact us to get the link to the registration. \n 
URL:https://www.oact.inaf.it/event/our-universe-in-simulation/
LOCATION:Sede A. Riccò\, Via Santa Sofia 78\, Catania
CATEGORIES:Eventi & Seminari
ATTACH;FMTTYPE=image/jpeg:https://www.oact.inaf.it/wp-content/uploads/2026/03/seminario_Liu.jpg
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20250526T111500
DTEND;TZID=UTC:20250526T121500
DTSTAMP:20260502T110845
CREATED:20250524T100517Z
LAST-MODIFIED:20250524T100520Z
UID:18154-1748258100-1748261700@www.oact.inaf.it
SUMMARY:Quantum Computing for Astrophysics and Cosmology: Opportunities and Challenges
DESCRIPTION:Recording: https://www.oact.inaf.it/seminars/ \nDATE: Monday\, May 26\, 11:15 a.m. \nORGANIZER: INAF-OACT \nLOCATION: AULA OVEST (INAF-OACT) + remote \nLink for the remote audience:https://meet.google.com/wvf-uwxo-oyj \nSPEAKER:Farida Farsian (OACT-INAF) \nABSTRACT:The rapid advancement of quantum computing technologies is opening new frontiers across various scientific disciplines. As quantum devices continue to evolve\, investigating their potential to tackle complex computational problems in astrophysics and cosmology becomes essential.In this seminar\, I will present an overview of my recent research focused on the application of quantum computing and quantum machine learning techniques to astrophysical and cosmological problems. In particular\, I will discuss the implementation and capabilities of quantum neural networks in analyzing astrophysical data\, as well as the application of quantum Fourier transform in Cosmic Microwave Background data analysis.The talk will highlight both the promising opportunities and the current limitations of these quantum approaches\, providing a perspective on how quantum computing could contribute in data analysis and modeling in astrophysics in the near future. \n  \nA few rules:— before joining\, make sure you are using your institutional inaf.it account if you have one (otherwise we will grant you permission to join)— please do not forget to mute your microphone and switch off your webcam when access the virtual room— for questions leave a message in the chat\, the answers at the end of the webinar— the seminar will be recorded\, so if you are interested in it\, please contact us to get the link to the registration.
URL:https://www.oact.inaf.it/event/quantum-computing-for-astrophysics-and-cosmology-opportunities-and-challenges/
LOCATION:Sede A. Riccò\, Via Santa Sofia 78\, Catania
CATEGORIES:Eventi & Seminari
ATTACH;FMTTYPE=image/jpeg:https://www.oact.inaf.it/wp-content/uploads/2025/05/WhatsApp-Image-2025-05-13-at-15.09.52.jpeg
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20250414T110000
DTEND;TZID=UTC:20250414T120000
DTSTAMP:20260502T110845
CREATED:20250412T163324Z
LAST-MODIFIED:20250412T163327Z
UID:17962-1744628400-1744632000@www.oact.inaf.it
SUMMARY:Elucidating diffuse Galactic synchrotron emission for precision 21cm and CMB cosmology
DESCRIPTION:Recording: https://www.oact.inaf.it/seminars/ \nDATE: Monday\, April 14\, 11:00 a.m. \nORGANIZER: INAF-OACT \nLOCATION: AULA OVEST (INAF-OACT) + remote \nLink for the remote audience:https://meet.google.com/wvf-uwxo-oyj \nSPEAKER: Dr. Melis O. Irfan (IoA\, University of Cambridge) \nABSTRACT:The next generation of Cosmic Microwave Background experiments are poised to probe the inflationary period of the Universe through the measurement of primordial B-modes\, whilst 21cm experiments are observing the reionization history of the early Universe and formation of Large-Scale Structure through the mapping of neutral hydrogen. These two complementary fields span the radio to microwave frequency regimes and share a pivotal data reduction task: foreground component separation.Diffuse Galactic synchrotron emission is the dominant foreground for arcmin/degree scale cosmological surveys operating across MHz frequencies in intensity\, and at all frequencies under 60 GHz in polarised intensity. In this talk I will present measurements of the synchrotron spectral index and curvature between 73 MHz and 1 GHz through the combined use of pilot MeerKLASS\, Haslam\, Maipu/MU and LWA data. I will discuss the advances that can be made to component separation algorithms thanks to more sophisticated foreground emission modelling and will present a spatially complex\, all-sky model of the synchrotron spectral index formed using convolutional neural networks trained on sets of both high- and low-resolution empirical data. Such advances will\, and already are\, expanding our understanding of the spatial and spectral form of this complex emission; ameliorating component separation for both CMB and 21cm intensity mapping experiments. \n  \nA few rules:— before joining\, make sure you are using your institutional inaf.it account if you have one (otherwise we will grant you permission to join)— please do not forget to mute your microphone and switch off your webcam when access the virtual room— for questions leave a message in the chat\, the answers at the end of the webinar— the seminar will be recorded\, so if you are interested in it\, please contact us to get the link to the registration.
URL:https://www.oact.inaf.it/event/elucidating-diffuse-galactic-synchrotron-emission-for-precision-21cm-and-cmb-cosmology/
LOCATION:Sede A. Riccò\, Via Santa Sofia 78\, Catania
CATEGORIES:Eventi & Seminari
ATTACH;FMTTYPE=image/jpeg:https://www.oact.inaf.it/wp-content/uploads/2025/04/promo_page-0001.jpg
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20250407T110000
DTEND;TZID=UTC:20250407T120000
DTSTAMP:20260502T110845
CREATED:20250405T091539Z
LAST-MODIFIED:20250405T091543Z
UID:17926-1744023600-1744027200@www.oact.inaf.it
SUMMARY:Non-standard signatures from CMB polarisation with an insight into the new technological challenges
DESCRIPTION:Recording: https://www.oact.inaf.it/seminars/ \nDATE:  Monday\, April 7\, 11:00 a.m. \nORGANIZER: INAF-OACT \nLOCATION: AULA OVEST (INAF-OACT) + remote \nLink for the remote audience:https://meet.google.com/wvf-uwxo-oyj \nSPEAKER: Dr. Matteo Billi (University of Catania) \nABSTRACT:In this seminar\, I will focus on non-standard signatures from CMB polarisation that may indicate the existence of new phenomena beyond the standard models of cosmology and particle physics\, from both theoretical and observational perspectives. ESA’s Planck mission has observed CMB temperature anisotropies at the cosmic variance limit\, but polarisation remains to be further investigated. CMB polarisation data are important not only because they contribute to provide tighter constraints on cosmological parameters but also because they allow the study of physical processes that would be excluded if only the CMB temperature maps were considered. I use polarisation data into account to assess the statistical significance of the anomalies currently observed only in the CMB temperature map\, and to constrain the Cosmic Birefringence (CB) effect\, which is expected in parity-violating extensions of the standard electromagnetism.Measuring CMB polarisation is technically challenging because the polarised signal is much fainter than the temperature signal\, and accurate polarisation estimates require exquisite control of systematic effects. To investigate the impact of spurious signals in upcoming CMB polarisation experiments\, I present a study of the interplay between half-wave plate (HWP) non-idealities and the beams of the instrument for the next generation of CMB experiments\, with an insight into how this instrumental contamination affects the measurement of the cosmic birefringence effect. \n  \nA few rules:— before joining\, make sure you are using your institutional inaf.it account if you have one (otherwise we will grant you permission to join)— please do not forget to mute your microphone and switch off your webcam when access the virtual room— for questions leave a message in the chat\, the answers at the end of the webinar— the seminar will be recorded\, so if you are interested in it\, please contact us to get the link to the registration.
URL:https://www.oact.inaf.it/event/non-standard-signatures-from-cmb-polarisation-with-an-insight-into-the-new-technological-challenges/
LOCATION:Sede A. Riccò\, Via Santa Sofia 78\, Catania
CATEGORIES:Eventi & Seminari
ATTACH;FMTTYPE=image/jpeg:https://www.oact.inaf.it/wp-content/uploads/2025/04/seminario_Billi.jpg
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20250319T113000
DTEND;TZID=UTC:20250319T113000
DTSTAMP:20260502T110845
CREATED:20250304T175229Z
LAST-MODIFIED:20250305T075408Z
UID:17742-1742383800-1742383800@www.oact.inaf.it
SUMMARY:Status and future of 21-cm cosmology during the first billion years
DESCRIPTION:Recording: https://www.oact.inaf.it/seminars/ \nDATE:  Wednesday\, March 19\, 11:30 a.m. \nORGANIZER: INAF-OACT \nLOCATION: AULA OVEST (INAF-OACT) + remote \nLink for the remote audience:https://meet.google.com/wvf-uwxo-oyj \nSPEAKER: Prof. Andrei Mesinger (Scuola Normale Superiore\, Pisa) \nABSTRACT:The 21-cm hyperfine line of neutral hydrogen is set to revolutionize studies of the first billion years\, spanning the cosmic dawn of the first stars and eventual reionization of our Universe. I will discuss the potential of this probe in learning about the unknown astrophysics of the first galaxies as well as physical cosmology. Current upper limits on the cosmic 21-cm power spectrum already provide new insights into the heating of the intergalactic medium\, and the X-ray sources in the first galaxies. I will discuss the upcoming steps\, including the main challenges\, that will eventually lead to the Nobel prize-worthy 3D map of half of our observable Universe with the Square Kilometer Array (SKA) telescope.Our results show that a large scales we observe a continuous interplay between turbulence and gravity\, where the former creates structures at all scales and the latter takes the lead above a critical value of the surface density is reached\, ~ 0.1 g cm^-2. At the same time\, the fragmentation properties show several indications that the fragment are “clump-fed”\, i.e. the process is dynamical and the gravity dominates the collapse inside our massive clumps. \n  \nA few rules:— in case of large in-person attendance\, attendees may be asked to wear a face mask— before joining\, make sure you are using your institutional inaf.it account if you have one (otherwise we will grant you permission to join)— please do not forget to mute your microphone and switch off your webcam when access the virtual room— for questions leave a message in the chat\, the answers at the end of the webinar— the seminar will be recorded\, so if you are interested in it\, please contact us to get the link to the registration.
URL:https://www.oact.inaf.it/event/status-and-future-of-21-cm-cosmology-during-the-first-billion-years/
LOCATION:Sede A. Riccò\, Via Santa Sofia 78\, Catania
CATEGORIES:Eventi & Seminari
ATTACH;FMTTYPE=image/jpeg:https://www.oact.inaf.it/wp-content/uploads/2025/03/Seminario_mesinger.jpg
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20240722T110000
DTEND;TZID=UTC:20240722T120000
DTSTAMP:20260502T110845
CREATED:20240719T141616Z
LAST-MODIFIED:20240719T141620Z
UID:16589-1721646000-1721649600@www.oact.inaf.it
SUMMARY:Galactic Archaeology: decoding the fossil record of Galaxy formation and evolution
DESCRIPTION:Recording: https://www.oact.inaf.it/seminars/ \nDATE:  Monday\, July 22\, 11:00 a.m. \nORGANIZER: DFA UNICT \nLOCATION: AULA OVEST (INAF-OACT) + remote \nLink for the remote audience:https://meet.google.com/wvf-uwxo-oyj \nSPEAKER: Dott. Santi Cassisi\, INAF-Osservatorio Astronomico d’Abruzzo \nABSTRACT:One of most important issue in Astrophysics is the achievement of a robust understanding of the sequence of processes that contributed to the building up of the Milky Way. This is obviously important not only “on a local scale” in order to recover the history of formation and evolution of the Galaxy\, but also\, more in general\, for understanding the formation process of spiral galaxies. In the last decade\, the advent of high precision photometric and spectroscopic surveys as well as the possibility to estimate\, thanks to the ESA Gaia mission\, accurate distance for a huge number of field stars\, combined with the development of an accurate theoretical framework\, is actually opening a new era for this kind of investigations.We will present some recent results – obtained by using this updated observational and theoretical framework – about the formation and early evolution of the Milky Way. \n  \nA few rules:— in case of large in-person attendance\, attendees may be asked to wear a face mask— before joining\, make sure you are using your institutional inaf.it account if you have one (otherwise we will grant you permission to join)— please do not forget to mute your microphone and switch off your webcam when access the virtual room— for questions leave a message in the chat\, the answers at the end of the webinar— the seminar will be recorded\, so if you are interested in it\, please contact us to get the link to the registration.
URL:https://www.oact.inaf.it/event/galactic-archaeology-decoding-the-fossil-record-of-galaxy-formation-and-evolution/
LOCATION:Sede A. Riccò\, Via Santa Sofia 78\, Catania
CATEGORIES:Eventi & Seminari
ATTACH;FMTTYPE=image/jpeg:https://www.oact.inaf.it/wp-content/uploads/2024/07/Cassisi_11luglio.jpg
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20240715T113000
DTEND;TZID=UTC:20240715T120000
DTSTAMP:20260502T110845
CREATED:20240711T085847Z
LAST-MODIFIED:20240711T085851Z
UID:16553-1721043000-1721044800@www.oact.inaf.it
SUMMARY:Neural Networs: new models for recovering the Cosmic Microwave Background
DESCRIPTION:Recording: https://www.oact.inaf.it/seminars/ \nDATE:  Monday\, July 15\, 11:30 a.m. \nORGANIZER: INAF OACT \nLOCATION: AULA OVEST (INAF-OACT) + remote \nLink for the remote audience:https://meet.google.com/wvf-uwxo-oyj \nSPEAKER: Dr. José Manuel Casas González\, Instituto de Ciencias y Tecnologías Espaciales de Asturias (ICTEA) \nABSTRACT:The Cosmic Microwave Background\, the relic emission from the primordial Universe\, is one of the most important observables in Cosmology. Its recovery is generally carried out by parametric and (semi) blind methods after removing several Galactic and extragalactic emissions. However\, in order to take into account their non-linear behaviors\, Machine Learning approaches such Neural Networks seem to be promising for that task. In this talk\, I will describe how they begin to be an alternative and reliable methods for recovering the Cosmic Microwave Background. \n  \nA few rules:— in case of large in-person attendance\, attendees may be asked to wear a face mask— before joining\, make sure you are using your institutional inaf.it account if you have one (otherwise we will grant you permission to join)— please do not forget to mute your microphone and switch off your webcam when access the virtual room— for questions leave a message in the chat\, the answers at the end of the webinar— the seminar will be recorded\, so if you are interested in it\, please contact us to get the link to the registration.
URL:https://www.oact.inaf.it/event/neural-networs-new-models-for-recovering-the-cosmic-microwave-background/
LOCATION:Sede A. Riccò\, Via Santa Sofia 78\, Catania
CATEGORIES:Eventi & Seminari
ATTACH;FMTTYPE=image/jpeg:https://www.oact.inaf.it/wp-content/uploads/2024/07/JMCasas_SeminarImage.jpg
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20230612T113000
DTEND;TZID=UTC:20230612T123000
DTSTAMP:20260502T110845
CREATED:20230608T094522Z
LAST-MODIFIED:20230628T223649Z
UID:12967-1686569400-1686573000@www.oact.inaf.it
SUMMARY:Gravitational entropy proposals adaptable to structure formation in Cosmology
DESCRIPTION:Recording: https://www.oact.inaf.it/seminars/ \nDATE: Monday\, June 12\, 11:30 a.m. \nORGANIZER: INAF OACT \nLOCATION: AULA OVEST (INAF-OACT) + remote \nLink for the remote audience:https://meet.google.com/wvf-uwxo-oyj \nSPEAKER: Prof. Roberto A. Sussman (Universidad Nacional Autónoma de México) \nABSTRACT:I would like to summarize and present cosmological applications of two proposals of Gravitational entropy\, which are distinct from the standard holographic approach and from the entropy of the sources. One is the proposal by Clifton-Ellis and Tabakol (CET) based on the Bel-Robinson tensor\, the other by Hosoya and Buchert (HB)\, based on the Leibler-Kullbach functional of Information Theory. By applying these proposals to inhomogenous dust solutions of Einstein’s equations (LTB and Szekeres models)\, we have shown in various published articles that both proposals are equivalent in their predictions\, but CET is local and HB is non-local. Both yield entropy production in spacetime regions that can be characterized by generation and growth of structure (either overdensities or voids). The CET proposal provides an interesting interpretation of the cosmological constant as an asymptotic gravitational temperature that characterizes a finite entropy saturation value. \n  \nA few rules:— in case of large in-person attendance\, attendees may be asked to wear a face mask— before joining\, make sure you are using your institutional inaf.it account if you have one (otherwise we will grant you permission to join)— please do not forget to mute your microphone and switch off your webcam when access the virtual room— for questions leave a message in the chat\, the answers at the end of the webinar— the seminar will be recorded\, so if you are interested in it\, please contact us to get the link to the registration.
URL:https://www.oact.inaf.it/event/gravitational-entropy-proposals-adaptable-to-structure-formation-in-cosmology/
LOCATION:Sede A. Riccò\, Via Santa Sofia 78\, Catania
CATEGORIES:Eventi & Seminari
ATTACH;FMTTYPE=image/jpeg:https://www.oact.inaf.it/wp-content/uploads/2023/06/immagini_eventi.jpg
END:VEVENT
END:VCALENDAR