[Astronomy seminar] Astronomy departmental seminar Friday May 3 at 10:30am - Gang Li (KU Leuven)

[Astronomy seminar announcements]

Dear all,

The next SU astronomy departmental seminar will take place on Friday May 3 at 10:30am in room FC61 (AlbaNova building, 6th floor) and on zoom (https://stockholmuniversity.zoom.us/j/62211269644?pwd=K0J2eVVMa3pTa1JVN2lyRUJPR3Rjdz09).
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Speaker: Gang Li (KU Leuven)
Title: Asteroseismic observations of rapidly rotating stars in open clusters
Event: https://indico.fysik.su.se/event/8576/

Abstract:
Asteroseismology and cluster research can mutually benefit each other, yet synergistic studies between the two are still limited. On one hand, we can measure the temperature, luminosity, and mass of cluster member stars with high precision, which allows for more efficient constraints on asteroseismology models compared to single stars. On the other hand, asteroseismic investigation into the interiors of stars can also address questions about cluster evolution, such as how rotation and internal element transport affect stellar evolution, as well as the formation of extended main-sequence turn-off and blue stragglers. We collected photometric data from four open clusters in the Kepler field and two open clusters within the TESS continuous viewing zones in both the northern and southern hemispheres, discovering a significant number of variable stars. We pay special attention to A- to F-type stars, as their internal oscillations reveal the physical conditions at the edge of their convective cores. We found that young A-type main sequence stars can rotate at up to half the breakup rate, while the rotation rate of older A-type main sequence stars slows down with age. The variable stars in these clusters provide excellent samples for further exploration of angular momentum transfer and internal element mixing.

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We look forward to seeing many of you there. Thanks!

Adur, Adélaïde, and Sanja

Upcoming Events:

2024-05-08 Ivo (**Seminar on WEDNESDAY**)
2024-05-10 Ray Jayawardhana (**Seminar on KLÄMDAG**)
2024-05-14 Gayathri Viswanath (**Seminar on TUESDAY**)
2024-05-17 Elena Khomenko
2024-05-24 Matteo Messa
2024-05-31 Oleg Kochukhov (**Last seminar before summer break**)

You can subscribe to the seminars calendar in:
https://ttt.astro.su.se/ical/astro-seminars.ics
(Please note that calendar can be subject to updates)
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Join Zoom Meeting:
https://stockholmuniversity.zoom.us/j/62211269644?pwd=K0J2eVVMa3pTa1JVN2lyRUJPR3Rjdz09
Meeting ID: 622 1126 9644

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