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X-ORIGINAL-URL:https://www.oact.inaf.it
X-WR-CALDESC:Eventi per Osservatorio Astrofisico di Catania
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DTSTART:20230101T000000
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BEGIN:VEVENT
DTSTART;TZID=UTC:20260227T111500
DTEND;TZID=UTC:20260227T123000
DTSTAMP:20260421T003723
CREATED:20260224T095744Z
LAST-MODIFIED:20260224T114110Z
UID:19458-1772190900-1772195400@www.oact.inaf.it
SUMMARY:The EWOCS view of supermassive stellar clusters
DESCRIPTION:Recording: https://www.oact.inaf.it/seminars/ \nDATE: Friday\, February 27\, 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: M. G. Guarcello and the EWOCS Team \nABSTRACT:Star formation in our Galaxy typically occurs in environments less massive than 10^4 solar masses. However\, a few more extreme star forming environments on the Milky Way exist\, where hundreds of thousands to millions of stars form in dense regions. Often called “supermassive star clusters”\, they are rare in our Galaxy today\, while they are common in galaxies experiencing epochs of starburst. The international project EWOCS (Extendend Westerlund 1 and 2 Open Clusters Survey) is targeting the two closest superstar clusters in the Milky Way with a multi-wavelengtht survey which is based on an extensive set of data from radio to X-rays\, with the main objective of studying the formation and early evolution of stars over the whole mass spectrum in a starburst environment.In this talk\, I will discuss the motivations and objectives of the project\, the published results\, ongoing studies and the future developments. \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/the-ewocs-view-of-supermassive-stellar-clusters/
LOCATION:Sede A. Riccò\, Via Santa Sofia 78\, Catania
CATEGORIES:Eventi & Seminari
ATTACH;FMTTYPE=image/jpeg:https://www.oact.inaf.it/wp-content/uploads/2026/02/Locandina-evento-EWOCS-OACT.jpg
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BEGIN:VEVENT
DTSTART;TZID=UTC:20250929T110000
DTEND;TZID=UTC:20250929T120000
DTSTAMP:20260421T003723
CREATED:20250915T101627Z
LAST-MODIFIED:20250927T182741Z
UID:18701-1759143600-1759147200@www.oact.inaf.it
SUMMARY:The Fossil Groups puzzle: ancient relics or young pretenders?
DESCRIPTION:Recording: https://www.oact.inaf.it/seminars/ \nDATE: Monday\, September 29\, 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: Stefano Zarattini (Centro de Estudios de Física del Cosmos de Aragón – CEFCA) \nABSTRACT:Fossil groups (FGs) were initially believed to represent the end stage of galaxy group evolution\, characterised by a significant luminosity gap between their two brightest member galaxies which was seen as an indicator of their advanced age. In this picture\, FGs were thought to undergo a long passive evolution in which their bright satellites gradually merged into the central galaxy\, making them fossil relics of the ancient Universe. However\, results from the Fossil Group Origins (FOGO) project suggest a paradigm shift: FGs are not necessarily old\, but rather isolated systems whose location within the cosmic web primarily regulates their evolution. In this scenario\, the magnitude gap arises at low redshift thanks to the infall of galaxies on radial orbits\, which enhances the merging rate observed in FGs. \nIn this seminar\, I will review the progress achieved over the last 15 years that led to this new interpretation. I will discuss the luminosity functions\, substructures\, cosmic web environment\, and orbital distribution of FG galaxies\, also highlighting the view of FGs as transitional systems. Numerical simulations will also be presented to support the observational evidence\, reinforcing the idea that the magnitude gap is a relatively recent feature rather than the imprint of an early formation epoch. \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/the-fossil-groups-puzzle-ancient-relics-or-young-pretenders/
LOCATION:Sede A. Riccò\, Via Santa Sofia 78\, Catania
CATEGORIES:Eventi & Seminari
ATTACH;FMTTYPE=image/jpeg:https://www.oact.inaf.it/wp-content/uploads/2025/09/Captura-de-pantalla-2025-09-15-a-las-10.08.26.jpg
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BEGIN:VEVENT
DTSTART;TZID=UTC:20231120T113000
DTEND;TZID=UTC:20231120T123000
DTSTAMP:20260421T003723
CREATED:20231114T091439Z
LAST-MODIFIED:20231114T091442Z
UID:14891-1700479800-1700483400@www.oact.inaf.it
SUMMARY:Challenges for the forthcoming CMB polarization experiments
DESCRIPTION:Recording: https://www.oact.inaf.it/seminars/ \nDATE: Monday\, November 20\, 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: Prof. Giuseppe Puglisi (DFA – Università di Catania) \nABSTRACT:One of the major challenges in the context of the Cosmic Microwave Background (CMB) radiation is to detect a polarization pattern\, the so called B-modes of CMB polarization\, that are thought to be directly linked to the space-time fluctuations present in the Universe at the very first instants of life. To date\, several challenges have prevented to detect the B-modes partly because of the lower sensitivity of the detectors. Our own Galaxy is observed in this context as a foreground contamination. However the awareness of improving the modeling of its polarized emission has been constantly increase not only to assess the cosmological signals but also to provide new insights onto the Galactic magnetic field probed with the Galactic polarized emissions\, e.g. synchrotron and thermal dust. This is particularly relevant in order to better characterize the foreground contamination for future CMB experiments (e.g. SO\, LiteBIRD\, CMB-S4 )\, where unprecedented polarization sensitivities are expected to be achieved in the coming decades. \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/challenges-for-the-forthcoming-cmb-polarization-experiments/
LOCATION:Sede A. Riccò\, Via Santa Sofia 78\, Catania
CATEGORIES:Eventi & Seminari
ATTACH;FMTTYPE=image/jpeg:https://www.oact.inaf.it/wp-content/uploads/2023/11/seminario_puglisi.jpg
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