Detection and Characterization of Oscillating Red Giants: First Results from the TESS Satellite
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Aguirre_2020_ApJL_889_L34.pdf
Description
Published version
Size
857.72 KB
Format
Adobe PDF
Checksum (MD5)
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Author(s)
Aguirre, Víctor Silva
Stello, Dennis
Stokholm, Amalie
Mosumgaard, Jakob R.
Ball, Warrick H.
Basu, Sarbani
Bossini, Diego
Bugnet, Lisa
Buzasi, Derek
Campante, Tiago L.
Date Issued
January 2020
Journal
Astrophysical Journal Letters
Publisher
American Astronomical Society
Citation
Aguirre, Víctor Silva, et al. "Detection and Characterization of Oscillating Red Giants: First Results from the TESS Satellite." The Astrophysical Journal Letters, 889, 2 (February 2020).© 2020 The American Astronomical Society.
Version
Final published version
Abstract
Since the onset of the "space revolution" of high-precision high-cadence photometry, asteroseismology has been demonstrated as a powerful tool for informing Galactic archeology investigations. The launch of the NASA Transiting Exoplanet Survey Satellite (TESS) mission has enabled seismic-based inferences to go full sky-providing a clear advantage for large ensemble studies of the different Milky Way components. Here we demonstrate its potential for investigating the Galaxy by carrying out the first asteroseismic ensemble study of red giant stars observed by TESS. We use a sample of 25 stars for which we measure their global asteroseimic observables and estimate their fundamental stellar properties, such as radius, mass, and age. Significant improvements are seen in the uncertainties of our estimates when combining seismic observables from TESS with astrometric measurements from the Gaia mission compared to when the seismology and astrometry are applied separately. Specifically, when combined we show that stellar radii can be determined to a precision of a few percent, masses to 5%-10%, and ages to the 20% level. This is comparable to the precision typically obtained using end-of-mission Kepler data.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences
Massachusetts Institute of Technology. Department of Aeronautics and Astronautics
MIT Kavli Institute for Astrophysics and Space Research
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.3847/2041-8213/ab6443
