BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Osservatorio Astrofisico di Catania - ECPv6.14.0//NONSGML v1.0//EN
CALSCALE:GREGORIAN
METHOD:PUBLISH
X-ORIGINAL-URL:https://www.oact.inaf.it
X-WR-CALDESC:Eventi per Osservatorio Astrofisico di Catania
REFRESH-INTERVAL;VALUE=DURATION:PT1H
X-Robots-Tag:noindex
X-PUBLISHED-TTL:PT1H
BEGIN:VTIMEZONE
TZID:UTC
BEGIN:STANDARD
TZOFFSETFROM:+0000
TZOFFSETTO:+0000
TZNAME:UTC
DTSTART:20220101T000000
END:STANDARD
END:VTIMEZONE
BEGIN:VEVENT
DTSTART;TZID=UTC:20220729T080000
DTEND;TZID=UTC:20221227T235900
DTSTAMP:20260423T093145
CREATED:20221124T125736Z
LAST-MODIFIED:20230310T120040Z
UID:11581-1659081600-1672185540@www.oact.inaf.it
SUMMARY:D.D. 434/22 – Assegno di Ricerca tipologia “Professionalizzazione”\, della durata di 12 mesi dal titolo “Backends per SRT”
DESCRIPTION:Assegno di Ricerca tipologia “Professionalizzazione”\, della durata di 12 mesi dal titolo “Backends per SRT” nell’ambito del Progetto “CIR01_00010 – Potenziamento del Sardinia Radio Telescope per lo studio dell’Universo alle alte frequenze radio – rafforzamento del capitale umano”. Codice 458783. \n\nBando\nAllegato A NEW (il presente file sostituisce il precedente)\nAllegato B\nBando Deserto
URL:https://www.oact.inaf.it/event/d-d-2434-22-assegno-di-ricerca-tipologia-professionalizzazione-della-durata-di-12-mesi-dal-titolo-backends-per-srt/
CATEGORIES:Assegno di ricerca,Nuovo,Opportunità di lavoro
ATTACH;FMTTYPE=image/jpeg:https://www.oact.inaf.it/wp-content/uploads/2019/06/concorsi_adr.jpg
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20220928T160000
DTEND;TZID=UTC:20230930T000000
DTSTAMP:20260423T093145
CREATED:20230920T143350Z
LAST-MODIFIED:20231002T083933Z
UID:13631-1664380800-1696032000@www.oact.inaf.it
SUMMARY:Notte Europea dei Ricercatori 2023
DESCRIPTION:SHARPER è il nome di uno dei 6 progetti italiani sostenuti dalla Commissione Europea per la realizzazione della Notte Europea dei Ricercatori. \nSHARPER significa SHAring Researchers’ Passion for Enhanced Roadmaps e ha l’obiettivo di coinvolgere tutti i cittadini nella scoperta del mestiere di ricercatore e del ruolo che i ricercatori svolgono nel costruire il futuro della società attraverso l’indagine del mondo basata sui fatti\, le osservazioni e l’abilità nell’adattarsi e interpretare contesti sociali e culturali sempre più complessi e in continua evoluzione. \nPer l’edizione 2023\, SHARPER si svolgerà il 29 settembre in 14 città italiane\, tra cui Catania\, per raccontare la passione\, le scoperte e le sfide dei ricercatori di tutta Europa attraverso mostre\, spettacoli\, concerti\, giochi\, conferenze e centinaia di altre iniziative rivolte al grande pubblico. \nIn occasione della Notte dei Ricercatori 2023\, l’INAF-Osservatorio Astrofisico di Catania ha organizzato le seguenti attività per il pubblico che si svolgeranno tra il 28 e il 30 settembre: \n  \n			\n			\n				\n				\n				\n				\n			\n				\n				\n				\n				\n				\n				\n				\n				\n				\n				\n				\n			\n			\n				\n				\n				\n				\n				\n				\n				\n				\n				\n				\n\n\nIL SOLE E IL CLIMA TERRESTRE – Gli effetti della variazione dell’irraggiamento solare sul clima terrestre \nWebinar a cura di Paolo RomanoData e ora: 28-09-2023 dalle 16:00 alle 17:00 \n\n\n\n\nPer partecipare gli interessati dovranno mandare una email a divulgazione.oact@inaf.it\, oppure potranno seguire l’evento in diretta sul nostro canale YouTube. \n\n			\n			\n				\n				\n				\n				\n			\n				\n				\n				\n				\n				\n				\n				\n				\n				\n				\n				\n			\n			\n				\n				\n				\n				\n				\n				\n				\n				\n				\n				\n\n\nOCEAN WORLDS: ALLA RICERCA DELLA VITA – Gli oceani extraterresti come possibili sedi di vita \nWebinar a cura di Daniela SiciliaData e ora: 28-09-2023 dalle 17:00 alle 18:00 \n\n\n\n\nPer partecipare gli interessati dovranno mandare una email a divulgazione.oact@inaf.it\, oppure potranno seguire l’evento in diretta sul nostro canale YouTube. \n\n			\n			\n				\n				\n				\n				\n			\n				\n				\n				\n				\n				\n				\n				\n				\n				\n				\n				\n			\n			\n				\n				\n				\n				\n				\n				\n				\n				\n				\n				\n\n\nTECNICHE DI RADIOASTRONOMIA PER LA MEDICINA – Le tecniche di imaging in radioastronomia trovano largo impiego nella medicina e si sono rivelate fondamentali per la rivelazione precoce di cellule tumorali \nWebinar a cura di Francesco CavallaroData e ora: 28-09-2023 dalle 18:00 alle 19:00 \n\n\n\n\nPer partecipare gli interessati dovranno mandare una email a divulgazione.oact@inaf.it\, oppure potranno seguire l’evento in diretta sul nostro canale YouTube. \n\n			\n			\n				\n				\n				\n				\n			\n				\n				\n				\n				\n				\n				\n				\n				\n				\n				\n				\n			\n			\n				\n				\n				\n				\n				\n				\n				\n				\n				\n				\n\n\nSPACE WEATHER\, OCEANI ALIENI\, RADIODIAGNOSTICHE – Stand sulle attività dell’INAF – Osservatorio Astrofisico di Catania legate ai temi: Space weather\, oceani di altri mondi e ricerca della vita\, tecniche di radioastronomia per la lotta ai tumori \nA cura di Giuseppe CutispotoData e ora: 29-09-2023 dalle 18:00 alle 24:00Luogo: Piazza Università\, Catania \n\n\n\n			\n			\n				\n				\n				\n				\n			\n				\n				\n				\n				\n				\n				\n				\n				\n				\n				\n				\n			\n			\n				\n				\n				\n				\n				\n				\n				\n				\n				\n				\n\n\nIL SOLE E LO SPACE WEATHER: VIVERE CON UNA STELLA – Conferenza sulle relazioni Sole-Terra e osservazioni del Sole al telescopio presso la sede “A. Riccò” \nA cura di Salvatore Guglielmino e Fabiana FerrenteData e ora: 30-09-2023 dalle 10:00 alle 13:00Luogo: Osservatorio astrofisico “A. Riccò” – Via Santa Sofia 78 (CT) \n\n\n\n			\n			\n				\n				\n				\n				\n			\n				\n				\n				\n				\n				\n				\n				\n				\n				\n				\n				Inoltre\, invitiamo le scuole a partecipare alla finale del torneo nazionale Sharper di SUMO SCIENCE (evento a cura di Psiquadro) che si svolgerà venerdì 29 settembre\, dalle ore 9 alle ore 13.30\, presso l’Auditorium Santa Cecilia di Perugia\, con la possibilità di partecipare online (prenotazione obbligatoria). Dettagli sotto: \n			\n			\n				\n				\n				\n				\n			\n				\n				\n				\n				\n				\n				\n				\n				\n				\n				\n				\n			\n			\n				\n				\n				\n				\n				\n				\n				\n				\n				\n				\n\n\nSumoScience – Final Four – Sharper Edition (ONLINE) – La finale del torneo nazionale Sharper di SUMO SCIENCE. Tutte le classi partecipanti\, sia in sala che da remoto\, potranno porre domande agli sfidanti e partecipare alle votazioni \n\n\n\n			\n			\n				\n				\n				\n				\n			\n				\n				\n				\n				\n				\n				\n				\n				\n				\n				\n				\n\n\nI quattro semifinalisti sono: \n\nFrancesca Garaventa (Consiglio Nazionale delle Ricerche) – SCIENZE MARINE\nFrancesca Ginatempo (Università di Sassari) – FISIOLOGIA\nRoberto Pierdicca (Università Politecnica delle Marche) – GEOMATICA\nPaolo Romano (INAF – Osservatorio Astrofisico di Catania) – FISICA SOLARE\n\n\n\n\n\nPer prenotare la partecipazione ONLINE\, collegarsi al seguente link.
URL:https://www.oact.inaf.it/event/notte-europea-dei-ricercatori-2023/
CATEGORIES:Eventi & Seminari
ATTACH;FMTTYPE=image/jpeg:https://www.oact.inaf.it/wp-content/uploads/2022/09/288774849_5253869261329108_8783305418292131719_n.jpg
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20221107T110000
DTEND;TZID=UTC:20221107T120000
DTSTAMP:20260423T093146
CREATED:20221017T115018Z
LAST-MODIFIED:20221023T091107Z
UID:11134-1667818800-1667822400@www.oact.inaf.it
SUMMARY:Studying the rotation of solar-type stars\, from the surface to the core
DESCRIPTION:DATE: Monday\, November 7\, 11:00 a.m. \nORGANIZER: INAF OACT \nLOCATION: AULA OVEST (INAF-OACT) – Audience in-person max 20 \nLink for the remote audience:https://meet.google.com/wvf-uwxo-oyj \nSPEAKER: Dott. Sylvain Breton (INAF – Osservatorio Astrofisico di Catania) \nABSTRACT:Being able to constrain the rotation profile\, both radial and latitudinal\, of main-sequence solar-type stars\, from the surface to the core\, is a fundamental problem if we want to improve our understanding of stellar evolution (especially in order to get better constraints on stellar ages) and of the interactions of stars with their environment. As of today\, the core rotation profile of the Sun and other main-sequence solar-type stars remains a mystery. This is due to the absence of clear detection of gravity modes (g modes)\, which are evanescent in convective regions\, and therefore have very low-amplitude at the surface of the convective envelope of main-sequence solar-type stars. However\, large-scale photometric surveys of these past years have been able to provide us valuable insights on the rotational dynamics of the surface and the upper regions of the stars\, thanks to acoustic mode (p modes) asteroseismology and/or the characterisation of photospheric active regions. \nIn this seminar\, I will first present the machine learning methodology ROOSTER that I developed in order to analyse surface rotation in the light curves collected by the Kepler mission. This tool was used to build what is the largest photometric catalogue of surface stellar rotation available today\, opening many new perspectives for statistical study of the dynamics of the convective zone of solar-type stars\, through the characterisation of photospheric activity index and the estimation of the Rossby number\, a key parameter to constrain dynamics of rotating fluid. ROOSTER is currently being implemented in the MSAP4 module of the PLATO mission analysis pipeline. In order to assess the possibility to probe deeper into main-sequence solar-type stars\, I will then discuss the perspective of detecting stochastic g modes (excited by convective motions) in late F-type stars\, which are solar-type pulsators with a convective envelope shallower than the one of the Sun. For this purpose\, I used the ASH code to perform several deep-shell 3D hydrodynamic simulations of a 1.3 Msun late F-type star. These simulations are the first 3D simulations of F-type stars including the radiative interior in the simulation domain. I will highlight the influence of rotation on the increased excitation of the internal gravity waves giving rise to the modes. I will show that\, even of low amplitudes\, g-mode signatures are detectable at the top of the convective envelope in the simulations. To connect modelling with observation\, I will finally present an attempt to detect such signatures in late F-type stars observed by Kepler. A thorough analysis of the power spectra of stars in the selected working sample allows selecting several candidates. In the framework of this task\, I will also explain how the characterisation of the photometric signature of several non-transiting companions led me to consider the possible role that a substellar companion can play in the excitation of g-modes for main-sequence solar-type stars. \n  \nA few rules:— access the virtual room with the microphone and camera switched off.— for questions leave a message in the chat and the answers at the end of the webinar.
URL:https://www.oact.inaf.it/event/studying-the-rotation-of-solar-type-stars-from-the-surface-to-the-core/
CATEGORIES:Eventi & Seminari
ATTACH;FMTTYPE=image/jpeg:https://www.oact.inaf.it/wp-content/uploads/2022/10/titleslide_updated.jpg
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20221121T110000
DTEND;TZID=UTC:20221121T120000
DTSTAMP:20260423T093146
CREATED:20221117T181209Z
LAST-MODIFIED:20221117T181349Z
UID:11530-1669028400-1669032000@www.oact.inaf.it
SUMMARY:Cleaning RV time series from stellar activity: SN-fit and bp-method
DESCRIPTION:DATE: Monday\, November 21\, 11:00 a.m. \nORGANIZER: INAF OACT \nLOCATION: AULA OVEST (INAF-OACT) \nSPEAKER: Dott. Andrea Bonfanti (Austrian Academy of Sciences\, Graz) \nABSTRACT:The radial velocity (RV) technique is one of the most successful method for detecting exoplanets and it is based on measuring the Doppler reflex motion induced on a star by its orbiting planets. However\, the stellar activity in the form of oscillations\, granulations\, spots or faculae also produces Doppler signals which may completely hide the Keplerian signal of an exoplanet. Removing the stellar activity contribution from a RV time series is then crucial to hopefully detect an exoplanet. While exoplanets produce a Doppler-shift on the CCF extracted from the stellar spectrum without modifying its shape or its width\, active regions produce variations in both the asymmetry and the FWHM of the CCF. During my talk I will present a novel technique for removing stellar activity that can be divided in two steps. In the first step a Skew-Normal (SN) fit is applied to the CCF to retrieve not only the Doppler signal which constitutes the RV time series\, but also the FWHM\, the contrast\, and the skewness of the fitted function. These hyperparameters are activity indicators\, therefore they are employed during the second step\, when the RV time series is cleaned from stellar activity. To this end\, I will present you the breakpoint (bp) method\, which belongs to the family of change point detection algorithm. In fact\, if on the one hand the Keplerian signal is persistent along the RV time series\, on the other hand active regions (hence their RV signal) evolve over time. The core idea of the bp method is to evaluate those locations along a time series where the correlation changes involving the activity indicators are statistically significant. Applying a piecewise detrending rather than an overall correction (oc) turns out to be much more effective in removing the stellar activity contribution as shown by different examples where this framework has been applied.
URL:https://www.oact.inaf.it/event/cleaning-rv-time-series-from-stellar-activity-sn-fit-and-bp-method/
CATEGORIES:Eventi & Seminari
ATTACH;FMTTYPE=image/jpeg:https://www.oact.inaf.it/wp-content/uploads/2022/11/SN_bp1stPage_page-0001.jpg
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20221124T110000
DTEND;TZID=UTC:20221124T120000
DTSTAMP:20260423T093146
CREATED:20221121T142924Z
LAST-MODIFIED:20221121T143024Z
UID:11551-1669287600-1669291200@www.oact.inaf.it
SUMMARY:Unveiling the atmospheric evolution of exoplanets: the PASTA tool
DESCRIPTION:DATE: Monday\, November 24\, 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: Dott. Andrea Bonfanti (Austrian Academy of Sciences\, Graz) \nABSTRACT:A thorough characterisation of an exoplanetary system includes also studying the evolution of planetary atmospheres. To this end\, we developed a custom Python tool that we have dubbed PASTA: Planetary Atmospheres and Stellar roTation rAtes. The tool runs within a Bayesian framework and it adopts a MCMC scheme to estimate the atmospheric content of exoplanets at the dispersal of the protoplanetary disk accounting for the present day system observables. As a positive by-product\, the evolution of the stellar rotation period is reconstructed as well. In detail\, our tool relies on planetary evolutionary models relating mass\, radius and equilibrium temperature with the expected atmospheric mass fraction and mass loss rate\, the latter derived from hydrodynamic simulations. The atmospheric mass loss rate is significantly influenced by the stellar activity level\, which is estimated from the stellar rotation period via empirical relations. In particular\, gyrochronology and theoretical stellar evolutionary tracks are essential to evaluate the high-energy emission over time. We have successfully applied this framework to a number of recently discovered planets\, including various CHEOPS targets. The synergy between CHEOPS and radial velocity spectrographs have already allowed us to identify different systems amenable to PASTA’s analysis\, so to constrain the planet formation and stellar evolution. \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 \n— for questions leave a message in the chat\, the answers at the end of the webinar
URL:https://www.oact.inaf.it/event/unveiling-the-atmospheric-evolution-of-exoplanets-the-pasta-tool/
CATEGORIES:Eventi & Seminari
ATTACH;FMTTYPE=image/jpeg:https://www.oact.inaf.it/wp-content/uploads/2022/11/Pasta1stPage_page-0001.jpg
END:VEVENT
END:VCALENDAR