TY - JOUR
T1 - A 20 Second Cadence View of Solar-type Stars and Their Planets with TESS
T2 - Asteroseismology of Solar Analogs and a Recharacterization of p Men c
AU - Huber, Daniel
AU - White, Timothy R.
AU - Metcalfe, Travis S.
AU - Chontos, Ashley
AU - Fausnaugh, Michael M.
AU - Ho, Cynthia S.K.
AU - Van Eylen, Vincent
AU - Ball, Warrick H.
AU - Basu, Sarbani
AU - Bedding, Timothy R.
AU - Benomar, Othman
AU - Bossini, Diego
AU - Breton, Sylvain
AU - Buzasi, Derek L.
AU - Campante, Tiago L.
AU - Chaplin, William J.
AU - Christensen-Dalsgaard, J. rgen
AU - Cunha, Margarida S.
AU - Deal, Morgan
AU - Garciá, Rafael A.
AU - Garciá Munoz, Antonio
AU - Gehan, Charlotte
AU - González-Cuesta, Luciá
AU - Jiang, Chen
AU - Kayhan, Cenk
AU - Kjeldsen, Hans
AU - Lundkvist, Mia S.
AU - Mathis, Stéphane
AU - Mathur, Savita
AU - Monteiro, Mário J.P.F.G.
AU - Nsamba, Benard
AU - Ong, Jia Mian Joel
AU - Pakštiene, Erika
AU - Serenelli, Aldo M.
AU - Silva Aguirre, Victor
AU - Stassun, Keivan G.
AU - Stello, Dennis
AU - Norgaard Stilling, Sissel
AU - Lykke Winther, Mark
AU - Wu, Tao
AU - Barclay, Thomas
AU - Daylan, Tansu
AU - Günther, Maximilian N.
AU - Hermes, J. J.
AU - Jenkins, Jon M.
AU - Latham, David W.
AU - Levine, Alan M.
AU - Ricker, George R.
AU - Seager, Sara
AU - Shporer, Avi
AU - Twicken, Joseph D.
AU - Vanderspek, Roland K.
AU - Winn, Joshua N.
N1 - Publisher Copyright:
© 2022. The Author(s). Published by the American Astronomical Society..
PY - 2022/2/1
Y1 - 2022/2/1
N2 - We present an analysis of the first 20 second cadence light curves obtained by the TESS space telescope during its extended mission. We find improved precision of 20 second data compared to 2 minute data for bright stars when binned to the same cadence (˜10%-25% better for T ? 8 mag, reaching equal precision at T ˜ 13 mag), consistent with pre-flight expectations based on differences in cosmic-ray mitigation algorithms. We present two results enabled by this improvement. First, we use 20 second data to detect oscillations in three solar analogs (? Pav, ? Tuc, and p Men) and use asteroseismology to measure their radii, masses, densities, and ages to ˜1%, ˜3%, ˜1%, and ˜20% respectively, including systematic errors. Combining our asteroseismic ages with chromospheric activity measurements, we find evidence that the spread in the activity-age relation is linked to stellar mass and thus the depth of the convection zone. Second, we combine 20 second data and published radial velocities to recharacterize p Men c, which is now the closest transiting exoplanet for which detailed asteroseismology of the host star is possible. We show that p Men c is located at the upper edge of the planet radius valley for its orbital period, confirming that it has likely retained a volatile atmosphere and that the "asteroseismic radius valley"remains devoid of planets. Our analysis favors a low eccentricity for p Men c (<0.1 at 68% confidence), suggesting efficient tidal dissipation (Q/k 2,1 ? 2400) if it formed via high-eccentricity migration. Combined, these early results demonstrate the strong potential of TESS 20 second cadence data for stellar astrophysics and exoplanet science.
AB - We present an analysis of the first 20 second cadence light curves obtained by the TESS space telescope during its extended mission. We find improved precision of 20 second data compared to 2 minute data for bright stars when binned to the same cadence (˜10%-25% better for T ? 8 mag, reaching equal precision at T ˜ 13 mag), consistent with pre-flight expectations based on differences in cosmic-ray mitigation algorithms. We present two results enabled by this improvement. First, we use 20 second data to detect oscillations in three solar analogs (? Pav, ? Tuc, and p Men) and use asteroseismology to measure their radii, masses, densities, and ages to ˜1%, ˜3%, ˜1%, and ˜20% respectively, including systematic errors. Combining our asteroseismic ages with chromospheric activity measurements, we find evidence that the spread in the activity-age relation is linked to stellar mass and thus the depth of the convection zone. Second, we combine 20 second data and published radial velocities to recharacterize p Men c, which is now the closest transiting exoplanet for which detailed asteroseismology of the host star is possible. We show that p Men c is located at the upper edge of the planet radius valley for its orbital period, confirming that it has likely retained a volatile atmosphere and that the "asteroseismic radius valley"remains devoid of planets. Our analysis favors a low eccentricity for p Men c (<0.1 at 68% confidence), suggesting efficient tidal dissipation (Q/k 2,1 ? 2400) if it formed via high-eccentricity migration. Combined, these early results demonstrate the strong potential of TESS 20 second cadence data for stellar astrophysics and exoplanet science.
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UR - http://www.scopus.com/inward/citedby.url?scp=85124190099&partnerID=8YFLogxK
U2 - 10.3847/1538-3881/ac3000
DO - 10.3847/1538-3881/ac3000
M3 - Article
AN - SCOPUS:85124190099
SN - 0004-6256
VL - 163
JO - Astronomical Journal
JF - Astronomical Journal
IS - 2
M1 - 79
ER -