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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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DTSTART:20260101T000000
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BEGIN:VEVENT
DTSTART;TZID=UTC:20260122T110000
DTEND;TZID=UTC:20260122T120000
DTSTAMP:20260404T194249
CREATED:20260115T110917Z
LAST-MODIFIED:20260120T171121Z
UID:19332-1769079600-1769083200@www.oact.inaf.it
SUMMARY:Magnetic activity nesting on the Sun and low-mass stars: Results from nearly continuous monitoring of solar active nests with ESA’s Solar Orbiter
DESCRIPTION:Recording: https://www.oact.inaf.it/seminars/ \nDATE: Thursday\, January 22\, 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: Adam Finley (ESA Noordwijk) \nABSTRACT:The magnetic activity of low-mass stars\, driven by the interplay of convection and rotation in their interiors\, is fundamental to their evolution and significantly affects the search for habitable exoplanets. Magnetic activity manifests at the surface as “spots” (or active regions) that influence the circumstellar environment through energetic radiation and eruptive events (flares and coronal mass-ejections\, collectively termed “space weather”). The Sun exhibits a well-known 11-year activity cycle where spot emergence drifts from mid to low latitudes. However\, one puzzling feature of the solar dynamo is the repeated emergence of spots in close proximity\, which leads to long-lived sources of magnetic activity known as active nests. Nesting is observed on other low-mass stars\, suggesting it is an innate\, universal feature of stellar dynamos. It is theorized that non-axisymmetries in the generation and storage of the magnetic field preference the emergence of spots at specific latitudes and longitudes\, leading to nesting. This phenomenon has consequences for predicting space weather near Earth and understanding the secular evolution of exoplanetary atmospheres. Studies of solar active nests have been limited by our single viewpoint from Earth. But with ESA’s Solar Orbiter now monitoring the Sun’s far-side for several months each year\, multi-viewpoint observations provide a pathway to study the formation and evolution of active nests. So far we have identified an active nest in 2022 that was responsible for 50–70% of all solar flares across the entire solar surface over five months (a prolific flare factory). In addition\, we saw a dramatic intensification of solar flare activity in 2024 following the collision of two active nests. These continuous\, multi-viewpoint observations strengthen the connection between solar activity and the nesting observed on other low-mass stars\, a link that will be further explored with ESA’s PLATO mission. \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/magnetic-activity-nesting-on-the-sun-and-low-mass-stars-results-from-nearly-continuous-monitoring-of-solar-active-nests-with-esas-solar-orbiter/
LOCATION:Sede A. Riccò\, Via Santa Sofia 78\, Catania
CATEGORIES:Eventi & Seminari
ATTACH;FMTTYPE=image/jpeg:https://www.oact.inaf.it/wp-content/uploads/2026/01/Finley_titleslide.jpg
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20260223T113000
DTEND;TZID=UTC:20260223T123000
DTSTAMP:20260404T194249
CREATED:20260217T114411Z
LAST-MODIFIED:20260217T114440Z
UID:19430-1771846200-1771849800@www.oact.inaf.it
SUMMARY:Inferring past accretion bursts from asteroseismic imprints
DESCRIPTION:Recording: https://www.oact.inaf.it/seminars/ \nDATE: Monday\, February 23\, 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:Johannes Jørgensen (Innsbruck University) \nABSTRACT:Stars form during the collapse of dense molecular cloud cores. However\, most of their final mass comes from the ensuing protostellar disk\, owing to non-zero angular momentum in the cloud. Here\, the protostar gains up to 50% of its final mass in episodic bursts of mass accretion\, while having quiescent phases between the bursts. In this presentation I present a study of how the occurrence of such bursts may be inferred using asteroseismology – the study of stellar pulsations. Specifically\, I show how these intense episodes leave a detectable asteroseismic imprint in the deep stellar interior. \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/inferring-past-accretion-bursts-from-asteroseismic-imprints/
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/astrophysical_seminar.001.jpeg
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20260224T111500
DTEND;TZID=UTC:20260224T123000
DTSTAMP:20260404T194249
CREATED:20260219T161017Z
LAST-MODIFIED:20260219T161020Z
UID:19450-1771931700-1771936200@www.oact.inaf.it
SUMMARY:L’Office of Astronomy for Education Center Italy: che cosa è\, che cosa fa e perché lo fa in quel modo.
DESCRIPTION:Recording: https://www.oact.inaf.it/seminars/ \nDATE: Tuesday\, February 24\, 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: Stefano Sandrelli (INAF O.A. Brera) \nABSTRACT:Fondato nel marzo 2021\, l’Office of Astronomy for Education Center Italy (I-OAE) è un ufficio internazionale della IAU\, coordinato e finanziato da INAF. I-OAE promuove e sostiene pratiche di insegnamento innovativo\, centrato sulla persona\, e di corsi di formazione docenti.Nei suoi primi anni di esistenza\, I-OAE ha sviluppato processi collaborativi\, a cui hanno partecipato rappresentanti di Albania\, Cipro\, Croazia\, Egitto\, Francia\, Grecia\, Israele\, Italia\, Marocco\, Montenegro\, Palestina\, Portogallo\, Slovenia\, Siria\, Spagna e Turchia.  Non solo il network è costante crescita\, ma si sta dimostrando anche di attrarre fondi europei.I-OAE coordina anche l’edizione internazionale di astroEDU\, la piattaforma di attività didattiche peer-reviewed della IAU.I-OAE è un ufficio aperto alla collaborazione di volontari che ne condividano valori e metodi. \n  \nRicordiamo poche regole:— accedere alla virtual room con microfono e telecamera spenti— scrivete eventuali domande nella chat\, a cui verrà data risposta alla fine del webinar— connettersi al webinar utilizzando preferibilmente l’account INAF e il browser Chrome \n 
URL:https://www.oact.inaf.it/event/loffice-of-astronomy-for-education-center-italy-che-cosa-e-che-cosa-fa-e-perche-lo-fa-in-quel-modo/
LOCATION:Sede A. Riccò\, Via Santa Sofia 78\, Catania
CATEGORIES:Eventi & Seminari
ATTACH;FMTTYPE=image/jpeg:https://www.oact.inaf.it/wp-content/uploads/2026/02/2026.02.17_OAE@Sedi_Pagina_01.jpg
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20260227T111500
DTEND;TZID=UTC:20260227T123000
DTSTAMP:20260404T194249
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
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20260310T113000
DTEND;TZID=UTC:20260310T123000
DTSTAMP:20260404T194249
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:20260323T110000
DTEND;TZID=UTC:20260323T123000
DTSTAMP:20260404T194249
CREATED:20260318T081027Z
LAST-MODIFIED:20260318T081030Z
UID:19547-1774263600-1774269000@www.oact.inaf.it
SUMMARY:Magnetic instabilities and angular momentum transport in red giant core
DESCRIPTION:Recording: https://www.oact.inaf.it/seminars/ \nDATE: Monday\, March 23\, 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: Domenico Giovanni Meduri (INAF) \nABSTRACT:The stability of magnetic fields in radiative stellar interiors remains a fundamental open question in understanding the rotational and chemical evolution of low-mass stars. Recent high-resolution asteroseismic observations of red giants have revealed unexpectedly slow core rotations and the presence of strong internal magnetic fields\, opening a new window on the internal dynamics of evolved stars. In this talk\, I will review the main magnetohydrodynamic instabilities expected in radiative stellar interiors and present new 3D direct numerical simulations of the Tayler instability\, a kink-type instability of toroidal magnetic fields prevalent in these regions. By combining simulations\, linear stability analysis\, and stellar evolution models\, we identify where and under what conditions the Tayler instability is likely to operate in red giant cores. These results provide new insight into angular momentum transport in evolved low-mass stars and may also have broader implications for other stars with radiative interiors. \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/magnetic-instabilities-and-angular-momentum-transport-in-red-giant-core/
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/Meduri_OACT_23mar26_1st_page-0001.jpg
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