1. Very regular high-frequency pulsation modes in young intermediate-mass stars
- Author
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Gang Li, Andrew W. Mann, Michael J. Ireland, C. G. Tinney, Daniel Luke Holdsworth, Victoria Antoci, Hans Kjeldsen, Daniel R. Reese, Howard Isaacson, Jie Yu, Timothy R. White, Timothy R. Bedding, Jon M. Jenkins, Adam D. Rains, Dennis Stello, J. J. Hermes, George R. Ricker, Daniel Huber, Simon J. Murphy, William J. Chaplin, Warrick H. Ball, Yaguang Li, S. Sekaran, Roland Vanderspek, Tanda Li, Eric Gaidos, Isabel L. Colman, Christoph Bergmann, Andrew W. Howard, Curtis McCully, Timothy M. Brown, Barry Smalley, Markus Rabus, Daniel Harbeck, Jim Fuller, Daniel R. Hey, Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA (UMR_8109)), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP)
- Subjects
DELTA-SCUTI STARS ,SPECTROSCOPIC SURVEY ,Theoretical models ,FOCUS IMAGING SPECTROGRAPH ,FOS: Physical sciences ,F500 ,Astrophysics ,Astrophysics::Cosmology and Extragalactic Astrophysics ,Q1 ,Space (mathematics) ,01 natural sciences ,Asteroseismology ,Spectral line ,AFRICAN LARGE TELESCOPE ,QB460 ,0103 physical sciences ,Astrophysics::Solar and Stellar Astrophysics ,010303 astronomy & astrophysics ,Solar and Stellar Astrophysics (astro-ph.SR) ,Astrophysics::Galaxy Astrophysics ,QB ,Physics ,[PHYS]Physics [physics] ,RAPIDLY ROTATING STARS ,Science & Technology ,Multidisciplinary ,010308 nuclear & particles physics ,LAMBDA-BOOTIS STARS ,AMPLITUDE ,STELLAR PARAMETERS ,Multidisciplinary Sciences ,Stars ,Astrophysics - Solar and Stellar Astrophysics ,A-TYPE STARS ,Science & Technology - Other Topics ,Astrophysics::Earth and Planetary Astrophysics ,VELOCITIES ,Large group ,[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] ,Rapid rotation ,QB799 - Abstract
Asteroseismology is a powerful tool for probing the internal structures of stars by using their natural pulsation frequencies. It relies on identifying sequences of pulsation modes that can be compared with theoretical models, which has been done successfully for many classes of pulsators, including low-mass solar-type stars, red giants, high-mass stars and white dwarfs. However, a large group of pulsating stars of intermediate mass--the so-called delta Scuti stars--have rich pulsation spectra for which systematic mode identification has not hitherto been possible. This arises because only a seemingly random subset of possible modes are excited, and because rapid rotation tends to spoil the regular patterns. Here we report the detection of remarkably regular sequences of high-frequency pulsation modes in 60 intermediate-mass main-sequence stars, allowing definitive mode identification. Some of these stars have space motions that indicate they are members of known associations of young stars, and modelling of their pulsation spectra confirms that these stars are indeed young., published in Nature https://www.nature.com/articles/s41586-020-2226-8
- Published
- 2020
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