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Seismic signatures of stellar magnetic activity — what can we expect from TESS?
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Kiefer, René, Broomhall, Anne-Marie and Ball, Warrick H. (2019) Seismic signatures of stellar magnetic activity — what can we expect from TESS? Frontiers in Astronomy and Space Sciences, 6 . 52. doi:10.3389/fspas.2019.00052 ISSN 2296-987X.
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Official URL: http://dx.doi.org/10.3389/fspas.2019.00052
Abstract
Asteroseismic methods offer a means to investigate stellar activity and activity cycles as well as to identify those properties of stars which are crucial for the operation of stellar dynamos. With data from CoRoT and Kepler, signatures of magnetic activity have been found in the seismic properties of a few dozen stars. Now, NASA's Transiting Exoplanet Survey Satellite (TESS) mission offers the possibility to expand this, so far, rather exclusive group of stars. This promises to deliver new insight into the parameters that govern stellar magnetic activity as a function of stellar mass, age, and rotation rate. We derive a new scaling relation for the amplitude of the activity-related acoustic (p-mode) frequency shifts that can be expected over a full stellar cycle. Building on a catalog of synthetic TESS time series, we use the shifts obtained from this relation and simulate the yield of detectable frequency shifts in an extended TESS mission. We find that, according to our scaling relation, we can expect to find significant p-mode frequency shifts for a couple hundred main-sequence and early subgiant stars and for a few thousand late subgiant and low-luminosity red giant stars.
Item Type: | Journal Article | |||||||||
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Subjects: | Q Science > QB Astronomy | |||||||||
Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | |||||||||
Library of Congress Subject Headings (LCSH): | Solar cycle, Solar magnetic fields, Astroseismology, Extrasolar planets | |||||||||
Journal or Publication Title: | Frontiers in Astronomy and Space Sciences | |||||||||
Publisher: | Frontiers Research Foundation | |||||||||
ISSN: | 2296-987X | |||||||||
Official Date: | 30 July 2019 | |||||||||
Dates: |
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Volume: | 6 | |||||||||
Article Number: | 52 | |||||||||
DOI: | 10.3389/fspas.2019.00052 | |||||||||
Status: | Peer Reviewed | |||||||||
Publication Status: | Published | |||||||||
Access rights to Published version: | Open Access (Creative Commons) | |||||||||
Date of first compliant deposit: | 12 December 2019 | |||||||||
Date of first compliant Open Access: | 13 December 2019 | |||||||||
RIOXX Funder/Project Grant: |
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