TESS Asteroseismology of α Mensae: Benchmark Ages for a G7 Dwarf and Its M Dwarf Companion

Ashley Chontos; Daniel Huber; Travis A. Berger; Hans Kjeldsen; Aldo M. Serenelli; Victor Silva Aguirre; Warrick H. Ball; Sarbani Basu; Timothy R. Bedding; William J. Chaplin; Zachary R. Claytor; Enrico Corsaro; Rafael A. Garcia; Steve B. Howell; Mia S. Lundkvist; Savita Mathur; Travis S. Metcalfe; Martin B. Nielsen; Jia Mian Joel Ong; Zeynep Celik Orhan; Sibel Ortel; Maissa Salama; Keivan G. Stassun; R. H.D. Townsend; Jennifer L. Van Saders; Mark Winther; Mutlu Yildiz; R. Paul Butler; C. G. Tinney; Robert A. Wittenmyer

doi:10.3847/1538-4357/ac1269

TESS Asteroseismology of α Mensae: Benchmark Ages for a G7 Dwarf and Its M Dwarf Companion

Ashley Chontos^*, Daniel Huber, Travis A. Berger, Hans Kjeldsen, Aldo M. Serenelli, Victor Silva Aguirre, Warrick H. Ball, Sarbani Basu, Timothy R. Bedding, William J. Chaplin, Zachary R. Claytor, Enrico Corsaro, Rafael A. Garcia, Steve B. Howell, Mia S. Lundkvist, Savita Mathur, Travis S. Metcalfe, Martin B. Nielsen, Jia Mian Joel Ong, Zeynep Celik OrhanSibel Ortel, Maissa Salama, Keivan G. Stassun, R. H.D. Townsend, Jennifer L. Van Saders, Mark Winther, Mutlu Yildiz, R. Paul Butler, C. G. Tinney, Robert A. Wittenmyer

^*Corresponding author af dette arbejde

Institut for Fysik og Astronomi - Stellar Astrophysics Centre

Publikation: Bidrag til tidsskrift/Konferencebidrag i tidsskrift /Bidrag til avis › Tidsskriftartikel › Forskning › peer review

Abstract

Asteroseismology of bright stars has become increasingly important as a method to determine the fundamental properties (in particular ages) of stars. The Kepler Space Telescope initiated a revolution by detecting oscillations in more than 500 main-sequence and subgiant stars. However, most Kepler stars are faint and therefore have limited constraints from independent methods such as long-baseline interferometry. Here we present the discovery of solar-like oscillations in α Men A, a naked-eye (V = 5.1) G7 dwarf in TESS's southern continuous viewing zone. Using a combination of astrometry, spectroscopy, and asteroseismology, we precisely characterize the solar analog α Men A (T eff = 5569 62 K, R ∗ = 0.960 0.016 R o˙, M ∗ = 0.964 0.045 M o˙). To characterize the fully convective M dwarf companion, we derive empirical relations to estimate mass, radius, and temperature given the absolute Gaia magnitude and metallicity, yielding M ∗ = 0.169 0.006 M o˙, R ∗ = 0.19 0.01 R o˙, and T eff = 3054 44 K. Our asteroseismic age of 6.2 1.4 (stat) 0.6 (sys) Gyr for the primary places α Men B within a small population of M dwarfs with precisely measured ages. We combined multiple ground-based spectroscopy surveys to reveal an activity cycle of P = 13.1 1.1 yr for α Men A, a period similar to that observed in the Sun. We used different gyrochronology models with the asteroseismic age to estimate a rotation period of ∼30 days for the primary. Alpha Men A is now the closest (d = 10 pc) solar analog with a precise asteroseismic age from space-based photometry, making it a prime target for next-generation direct-imaging missions searching for true Earth analogs.

Originalsprog	Engelsk
Artikelnummer	229
Tidsskrift	Astrophysical Journal
Vol/bind	922
Nummer	2
ISSN	0004-637X
DOI	https://doi.org/10.3847/1538-4357/ac1269
Status	Udgivet - dec. 2021

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10.3847/1538-4357/ac1269

https://arxiv.org/pdf/2012.10797.pdf

Citationsformater

Chontos, A., Huber, D., Berger, T. A., Kjeldsen, H., Serenelli, A. M., Silva Aguirre, V., Ball, W. H., Basu, S., Bedding, T. R., Chaplin, W. J., Claytor, Z. R., Corsaro, E., Garcia, R. A., Howell, S. B., Lundkvist, M. S., Mathur, S., Metcalfe, T. S., Nielsen, M. B., Mian Joel Ong, J., ... Wittenmyer, R. A. (2021). TESS Asteroseismology of α Mensae: Benchmark Ages for a G7 Dwarf and Its M Dwarf Companion. Astrophysical Journal, 922(2), Artikel 229. https://doi.org/10.3847/1538-4357/ac1269

@article{75cfe2818f0a49fb9fa364542c433cde,

title = "TESS Asteroseismology of α Mensae: Benchmark Ages for a G7 Dwarf and Its M Dwarf Companion",

abstract = "Asteroseismology of bright stars has become increasingly important as a method to determine the fundamental properties (in particular ages) of stars. The Kepler Space Telescope initiated a revolution by detecting oscillations in more than 500 main-sequence and subgiant stars. However, most Kepler stars are faint and therefore have limited constraints from independent methods such as long-baseline interferometry. Here we present the discovery of solar-like oscillations in α Men A, a naked-eye (V = 5.1) G7 dwarf in TESS's southern continuous viewing zone. Using a combination of astrometry, spectroscopy, and asteroseismology, we precisely characterize the solar analog α Men A (T eff = 5569 62 K, R ∗ = 0.960 0.016 R o˙, M ∗ = 0.964 0.045 M o˙). To characterize the fully convective M dwarf companion, we derive empirical relations to estimate mass, radius, and temperature given the absolute Gaia magnitude and metallicity, yielding M ∗ = 0.169 0.006 M o˙, R ∗ = 0.19 0.01 R o˙, and T eff = 3054 44 K. Our asteroseismic age of 6.2 1.4 (stat) 0.6 (sys) Gyr for the primary places α Men B within a small population of M dwarfs with precisely measured ages. We combined multiple ground-based spectroscopy surveys to reveal an activity cycle of P = 13.1 1.1 yr for α Men A, a period similar to that observed in the Sun. We used different gyrochronology models with the asteroseismic age to estimate a rotation period of ∼30 days for the primary. Alpha Men A is now the closest (d = 10 pc) solar analog with a precise asteroseismic age from space-based photometry, making it a prime target for next-generation direct-imaging missions searching for true Earth analogs.",

author = "Ashley Chontos and Daniel Huber and Berger, {Travis A.} and Hans Kjeldsen and Serenelli, {Aldo M.} and {Silva Aguirre}, Victor and Ball, {Warrick H.} and Sarbani Basu and Bedding, {Timothy R.} and Chaplin, {William J.} and Claytor, {Zachary R.} and Enrico Corsaro and Garcia, {Rafael A.} and Howell, {Steve B.} and Lundkvist, {Mia S.} and Savita Mathur and Metcalfe, {Travis S.} and Nielsen, {Martin B.} and {Mian Joel Ong}, Jia and {Celik Orhan}, Zeynep and Sibel Ortel and Maissa Salama and Stassun, {Keivan G.} and Townsend, {R. H.D.} and {Van Saders}, {Jennifer L.} and Mark Winther and Mutlu Yildiz and Butler, {R. Paul} and Tinney, {C. G.} and Wittenmyer, {Robert A.}",

year = "2021",

month = dec,

doi = "10.3847/1538-4357/ac1269",

language = "English",

volume = "922",

journal = "Astrophysical Journal",

issn = "0004-637X",

publisher = "Institute of Physics Publishing, Inc",

number = "2",

}

Chontos, A, Huber, D, Berger, TA, Kjeldsen, H, Serenelli, AM, Silva Aguirre, V, Ball, WH, Basu, S, Bedding, TR, Chaplin, WJ, Claytor, ZR, Corsaro, E, Garcia, RA, Howell, SB, Lundkvist, MS, Mathur, S, Metcalfe, TS, Nielsen, MB, Mian Joel Ong, J, Celik Orhan, Z, Ortel, S, Salama, M, Stassun, KG, Townsend, RHD, Van Saders, JL, Winther, M, Yildiz, M, Butler, RP, Tinney, CG & Wittenmyer, RA 2021, 'TESS Asteroseismology of α Mensae: Benchmark Ages for a G7 Dwarf and Its M Dwarf Companion', Astrophysical Journal, bind 922, nr. 2, 229. https://doi.org/10.3847/1538-4357/ac1269

TY - JOUR

T1 - TESS Asteroseismology of α Mensae

T2 - Benchmark Ages for a G7 Dwarf and Its M Dwarf Companion

AU - Chontos, Ashley

AU - Huber, Daniel

AU - Berger, Travis A.

AU - Kjeldsen, Hans

AU - Serenelli, Aldo M.

AU - Silva Aguirre, Victor

AU - Ball, Warrick H.

AU - Basu, Sarbani

AU - Bedding, Timothy R.

AU - Chaplin, William J.

AU - Claytor, Zachary R.

AU - Corsaro, Enrico

AU - Garcia, Rafael A.

AU - Howell, Steve B.

AU - Lundkvist, Mia S.

AU - Mathur, Savita

AU - Metcalfe, Travis S.

AU - Nielsen, Martin B.

AU - Mian Joel Ong, Jia

AU - Celik Orhan, Zeynep

AU - Ortel, Sibel

AU - Salama, Maissa

AU - Stassun, Keivan G.

AU - Townsend, R. H.D.

AU - Van Saders, Jennifer L.

AU - Winther, Mark

AU - Yildiz, Mutlu

AU - Butler, R. Paul

AU - Tinney, C. G.

AU - Wittenmyer, Robert A.

PY - 2021/12

Y1 - 2021/12

N2 - Asteroseismology of bright stars has become increasingly important as a method to determine the fundamental properties (in particular ages) of stars. The Kepler Space Telescope initiated a revolution by detecting oscillations in more than 500 main-sequence and subgiant stars. However, most Kepler stars are faint and therefore have limited constraints from independent methods such as long-baseline interferometry. Here we present the discovery of solar-like oscillations in α Men A, a naked-eye (V = 5.1) G7 dwarf in TESS's southern continuous viewing zone. Using a combination of astrometry, spectroscopy, and asteroseismology, we precisely characterize the solar analog α Men A (T eff = 5569 62 K, R ∗ = 0.960 0.016 R o˙, M ∗ = 0.964 0.045 M o˙). To characterize the fully convective M dwarf companion, we derive empirical relations to estimate mass, radius, and temperature given the absolute Gaia magnitude and metallicity, yielding M ∗ = 0.169 0.006 M o˙, R ∗ = 0.19 0.01 R o˙, and T eff = 3054 44 K. Our asteroseismic age of 6.2 1.4 (stat) 0.6 (sys) Gyr for the primary places α Men B within a small population of M dwarfs with precisely measured ages. We combined multiple ground-based spectroscopy surveys to reveal an activity cycle of P = 13.1 1.1 yr for α Men A, a period similar to that observed in the Sun. We used different gyrochronology models with the asteroseismic age to estimate a rotation period of ∼30 days for the primary. Alpha Men A is now the closest (d = 10 pc) solar analog with a precise asteroseismic age from space-based photometry, making it a prime target for next-generation direct-imaging missions searching for true Earth analogs.

AB - Asteroseismology of bright stars has become increasingly important as a method to determine the fundamental properties (in particular ages) of stars. The Kepler Space Telescope initiated a revolution by detecting oscillations in more than 500 main-sequence and subgiant stars. However, most Kepler stars are faint and therefore have limited constraints from independent methods such as long-baseline interferometry. Here we present the discovery of solar-like oscillations in α Men A, a naked-eye (V = 5.1) G7 dwarf in TESS's southern continuous viewing zone. Using a combination of astrometry, spectroscopy, and asteroseismology, we precisely characterize the solar analog α Men A (T eff = 5569 62 K, R ∗ = 0.960 0.016 R o˙, M ∗ = 0.964 0.045 M o˙). To characterize the fully convective M dwarf companion, we derive empirical relations to estimate mass, radius, and temperature given the absolute Gaia magnitude and metallicity, yielding M ∗ = 0.169 0.006 M o˙, R ∗ = 0.19 0.01 R o˙, and T eff = 3054 44 K. Our asteroseismic age of 6.2 1.4 (stat) 0.6 (sys) Gyr for the primary places α Men B within a small population of M dwarfs with precisely measured ages. We combined multiple ground-based spectroscopy surveys to reveal an activity cycle of P = 13.1 1.1 yr for α Men A, a period similar to that observed in the Sun. We used different gyrochronology models with the asteroseismic age to estimate a rotation period of ∼30 days for the primary. Alpha Men A is now the closest (d = 10 pc) solar analog with a precise asteroseismic age from space-based photometry, making it a prime target for next-generation direct-imaging missions searching for true Earth analogs.

U2 - 10.3847/1538-4357/ac1269

DO - 10.3847/1538-4357/ac1269

M3 - Journal article

AN - SCOPUS:85121813311

SN - 0004-637X

VL - 922

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 2

M1 - 229

ER -

TESS Asteroseismology of α Mensae: Benchmark Ages for a G7 Dwarf and Its M Dwarf Companion

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