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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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TZID:UTC
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TZOFFSETFROM:+0000
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DTSTART:20250101T000000
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BEGIN:VEVENT
DTSTART;TZID=UTC:20251201T110000
DTEND;TZID=UTC:20251201T120000
DTSTAMP:20260410T122122
CREATED:20251128T143218Z
LAST-MODIFIED:20251128T143221Z
UID:19096-1764586800-1764590400@www.oact.inaf.it
SUMMARY:Asteroseismic and spectroscopic study of NGC1647
DESCRIPTION:Recording: https://www.oact.inaf.it/seminars/ \nDATE: Monday\, December 1\, 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: Mingfeng Qin (Beijing Normal University) \nABSTRACT:NGC1647 is a poorly studied open cluster\, with considerable discrepancies in age reported in previous works. To improve the precision of its characterization\, we applied HDBSCAN clustering in astrometric space\, complemented by radial-velocity filtering\, and identified 271 high-confidence cluster members. I will show as isochrone fitting to extinction-corrected photometry can provide a preliminary cluster age range. From TESS and K2 time-series photometry\, we identified 95 periodic variables\, including nine p-mode pulsators. By fitting stellar evolutionary models to these p-mode pulsators\, we derived “asteroseismic” cluster parameters\, Age and Metallicity. The seismic metallicity is consistent with spectroscopic estimates\, while the derived age exhibits significantly higher precision than traditional isochrone-based results. Moreover\, we analyzed LAMOST spectra using the ROTFIT tool and performed SED fitting to determine cluster extinction and conduct gyrochronology studies. This combined approach provides a refined benchmark for the fundamental parameters of NGC1647. \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/asteroseismic-and-spectroscopic-study-of-ngc1647/
LOCATION:Sede A. Riccò\, Via Santa Sofia 78\, Catania
CATEGORIES:Eventi & Seminari
ATTACH;FMTTYPE=image/jpeg:https://www.oact.inaf.it/wp-content/uploads/2025/11/NGC1647_talk_Catania_page-0001.jpg
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