The K2 Asteroseismic KEYSTONE sample of Dwarf and Subgiant Solar-Like Oscillators: I. Data and Asteroseismic parameters

Mikkel N. Lund; Sarbani Basu; Allyson Bieryla; Luca Casagrande; Daniel Huber; Saskia Hekker; Lucas Viani; Guy R. Davies; Tiago L. Campante; William J. Chaplin; Aldo M. Serenelli; J. M. Joel Ong; Warrick H. Ball; Amalie Stokholm; Earl P. Bellinger; Michaël Bazot; Dennis Stello; David W. Latham; Timothy R. White; Maryum Sayeed; Víctor Aguirre Børsen-Koch; Ashley Chontos

doi:10.1051/0004-6361/202450055

The K2 Asteroseismic KEYSTONE sample of Dwarf and Subgiant Solar-Like Oscillators: I. Data and Asteroseismic parameters

Mikkel N. Lund^*, Sarbani Basu, Allyson Bieryla, Luca Casagrande, Daniel Huber, Saskia Hekker, Lucas Viani, Guy R. Davies, Tiago L. Campante, William J. Chaplin, Aldo M. Serenelli, J. M. Joel Ong, Warrick H. Ball, Amalie Stokholm, Earl P. Bellinger, Michaël Bazot, Dennis Stello, David W. Latham, Timothy R. White, Maryum SayeedVíctor Aguirre Børsen-Koch, Ashley Chontos

^*Corresponding author for this work

Physics and Astronomy

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Abstract

Aims: The KEYSTONE project aims to enhance our understanding of solar-like oscillators by delivering a catalogue of global asteroseismic parameters (Δν and ν_max) for 173 stars, comprising mainly dwarfs and subgiants, observed by the K2 mission in its short-cadence mode during campaigns 6-19.
Methods: We derive atmospheric parameters and luminosities using spectroscopic data from TRES, astrometric data from Gaia, and the infrared flux method (IRFM) for a comprehensive stellar characterisation. Asteroseismic parameters are robustly extracted using three independent methods, complemented by an iterative refinement of the spectroscopic analyses using seismic logg values to enhance parameter accuracy.
Results: Our analysis identifies new detections of solar-like oscillations in 159 stars, providing an important complement to already published results from previous campaigns. The catalogue provides homogeneously derived atmospheric parameters and luminosities for the majority of the sample. Comparison between spectroscopic T_eff and those obtained from the IRFM demonstrates excellent agreement. The iterative approach to spectroscopic analysis significantly enhances the accuracy of the stellar properties derived.

Original language	English
Article number	A13
Number of pages	22
Journal	Astronomy and Astrophysics
Volume	688
DOIs	https://doi.org/10.1051/0004-6361/202450055
Publication status	Published - 30 Jul 2024

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22 pages, 18 figures, accepted for publication in Astronomy & Astrophysics (A

Keywords

astro-ph.SR

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LundM2024K2Final published version, 3.65 MBLicence: Creative Commons: Attribution (CC BY)

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Lund, M. N., Basu, S., Bieryla, A., Casagrande, L., Huber, D., Hekker, S., Viani, L., Davies, G. R., Campante, T. L., Chaplin, W. J., Serenelli, A. M., Ong, J. M. J., Ball, W. H., Stokholm, A., Bellinger, E. P., Bazot, M., Stello, D., Latham, D. W., White, T. R., ... Chontos, A. (2024). The K2 Asteroseismic KEYSTONE sample of Dwarf and Subgiant Solar-Like Oscillators: I. Data and Asteroseismic parameters. Astronomy and Astrophysics, 688, Article A13. https://doi.org/10.1051/0004-6361/202450055

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title = "The K2 Asteroseismic KEYSTONE sample of Dwarf and Subgiant Solar-Like Oscillators: I. Data and Asteroseismic parameters",

abstract = "Aims: The KEYSTONE project aims to enhance our understanding of solar-like oscillators by delivering a catalogue of global asteroseismic parameters (Δν and νmax) for 173 stars, comprising mainly dwarfs and subgiants, observed by the K2 mission in its short-cadence mode during campaigns 6-19. Methods: We derive atmospheric parameters and luminosities using spectroscopic data from TRES, astrometric data from Gaia, and the infrared flux method (IRFM) for a comprehensive stellar characterisation. Asteroseismic parameters are robustly extracted using three independent methods, complemented by an iterative refinement of the spectroscopic analyses using seismic logg values to enhance parameter accuracy. Results: Our analysis identifies new detections of solar-like oscillations in 159 stars, providing an important complement to already published results from previous campaigns. The catalogue provides homogeneously derived atmospheric parameters and luminosities for the majority of the sample. Comparison between spectroscopic Teff and those obtained from the IRFM demonstrates excellent agreement. The iterative approach to spectroscopic analysis significantly enhances the accuracy of the stellar properties derived.",

keywords = "astro-ph.SR",

author = "Lund, {Mikkel N.} and Sarbani Basu and Allyson Bieryla and Luca Casagrande and Daniel Huber and Saskia Hekker and Lucas Viani and Davies, {Guy R.} and Campante, {Tiago L.} and Chaplin, {William J.} and Serenelli, {Aldo M.} and Ong, {J. M. Joel} and Ball, {Warrick H.} and Amalie Stokholm and Bellinger, {Earl P.} and Micha{\"e}l Bazot and Dennis Stello and Latham, {David W.} and White, {Timothy R.} and Maryum Sayeed and B{\o}rsen-Koch, {V{\'i}ctor Aguirre} and Ashley Chontos",

note = "22 pages, 18 figures, accepted for publication in Astronomy & Astrophysics (A",

year = "2024",

month = jul,

day = "30",

doi = "10.1051/0004-6361/202450055",

language = "English",

volume = "688",

journal = "Astronomy and Astrophysics",

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Lund, MN, Basu, S, Bieryla, A, Casagrande, L, Huber, D, Hekker, S, Viani, L, Davies, GR, Campante, TL, Chaplin, WJ, Serenelli, AM, Ong, JMJ, Ball, WH , Stokholm, A, Bellinger, EP, Bazot, M, Stello, D, Latham, DW, White, TR, Sayeed, M, Børsen-Koch, VA & Chontos, A 2024, 'The K2 Asteroseismic KEYSTONE sample of Dwarf and Subgiant Solar-Like Oscillators: I. Data and Asteroseismic parameters', Astronomy and Astrophysics, vol. 688, A13. https://doi.org/10.1051/0004-6361/202450055

TY - JOUR

T1 - The K2 Asteroseismic KEYSTONE sample of Dwarf and Subgiant Solar-Like Oscillators

T2 - I. Data and Asteroseismic parameters

AU - Lund, Mikkel N.

AU - Basu, Sarbani

AU - Bieryla, Allyson

AU - Casagrande, Luca

AU - Huber, Daniel

AU - Hekker, Saskia

AU - Viani, Lucas

AU - Davies, Guy R.

AU - Campante, Tiago L.

AU - Chaplin, William J.

AU - Serenelli, Aldo M.

AU - Ong, J. M. Joel

AU - Ball, Warrick H.

AU - Stokholm, Amalie

AU - Bellinger, Earl P.

AU - Bazot, Michaël

AU - Stello, Dennis

AU - Latham, David W.

AU - White, Timothy R.

AU - Sayeed, Maryum

AU - Børsen-Koch, Víctor Aguirre

AU - Chontos, Ashley

N1 - 22 pages, 18 figures, accepted for publication in Astronomy & Astrophysics (A

PY - 2024/7/30

Y1 - 2024/7/30

N2 - Aims: The KEYSTONE project aims to enhance our understanding of solar-like oscillators by delivering a catalogue of global asteroseismic parameters (Δν and νmax) for 173 stars, comprising mainly dwarfs and subgiants, observed by the K2 mission in its short-cadence mode during campaigns 6-19. Methods: We derive atmospheric parameters and luminosities using spectroscopic data from TRES, astrometric data from Gaia, and the infrared flux method (IRFM) for a comprehensive stellar characterisation. Asteroseismic parameters are robustly extracted using three independent methods, complemented by an iterative refinement of the spectroscopic analyses using seismic logg values to enhance parameter accuracy. Results: Our analysis identifies new detections of solar-like oscillations in 159 stars, providing an important complement to already published results from previous campaigns. The catalogue provides homogeneously derived atmospheric parameters and luminosities for the majority of the sample. Comparison between spectroscopic Teff and those obtained from the IRFM demonstrates excellent agreement. The iterative approach to spectroscopic analysis significantly enhances the accuracy of the stellar properties derived.

AB - Aims: The KEYSTONE project aims to enhance our understanding of solar-like oscillators by delivering a catalogue of global asteroseismic parameters (Δν and νmax) for 173 stars, comprising mainly dwarfs and subgiants, observed by the K2 mission in its short-cadence mode during campaigns 6-19. Methods: We derive atmospheric parameters and luminosities using spectroscopic data from TRES, astrometric data from Gaia, and the infrared flux method (IRFM) for a comprehensive stellar characterisation. Asteroseismic parameters are robustly extracted using three independent methods, complemented by an iterative refinement of the spectroscopic analyses using seismic logg values to enhance parameter accuracy. Results: Our analysis identifies new detections of solar-like oscillations in 159 stars, providing an important complement to already published results from previous campaigns. The catalogue provides homogeneously derived atmospheric parameters and luminosities for the majority of the sample. Comparison between spectroscopic Teff and those obtained from the IRFM demonstrates excellent agreement. The iterative approach to spectroscopic analysis significantly enhances the accuracy of the stellar properties derived.

KW - astro-ph.SR

UR - https://www.aanda.org/component/article?access=doi&doi=10.1051/0004-6361/202450055

U2 - 10.1051/0004-6361/202450055

DO - 10.1051/0004-6361/202450055

M3 - Article

SN - 0004-6361

VL - 688

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

M1 - A13

ER -

The K2 Asteroseismic KEYSTONE sample of Dwarf and Subgiant Solar-Like Oscillators: I. Data and Asteroseismic parameters

Abstract

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