The First APOKASC Catalog of Kepler Dwarf and Subgiant Stars

Aldo Serenelli, Jennifer Johnson, Daniel Huber, Marc Pinsonneault, Warrick H. Ball, Jamie Tayar, Victor Silva Aguirre, Sarbani Basu, Nicholas Troup, Saskia Hekker, Thomas Kallinger, Dennis Stello, Guy R. Davies, Mikkel N. Lund, Savita Mathur, Benoit Mosser, Keivan G. Stassun, William J. Chaplin, Yvonne Elsworth, Rafael A. GarcíaRasmus Handberg, Jon Holtzman, Fred Hearty, D. A. García-Hernández, Patrick Gaulme, Olga Zamora

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Abstract

We present the first APOKASC catalog of spectroscopic and asteroseismic data for dwarfs and subgiants. Asteroseismic data for our sample of 415 objects have been obtained by the Kepler mission in short (58.5 s) cadence, and light curves span from 30 up to more than 1000 days. The spectroscopic parameters are based on spectra taken as part of the Apache Point Observatory Galactic Evolution Experiment and correspond to Data Release 13 of the Sloan Digital Sky Survey. We analyze our data using two independent Teff scales, the spectroscopic values from DR13 and those derived from SDSS griz photometry. We use the differences in our results arising from these choices as a test of systematic temperature uncertainties and find that they can lead to significant differences in the derived stellar properties. Determinations of surface gravity (log g), mean density (〈 ρ 〉), radius (R), mass (M), and age (τ) for the whole sample have been carried out by means of (stellar) grid-based modeling. We have thoroughly assessed random and systematic error sources in the spectroscopic and asteroseismic data, as well as in the grid-based modeling determination of the stellar quantities provided in the catalog. We provide stellar properties determined for each of the two Teff scales. The median combined (random and systematic) uncertainties are 2% (0.01 dex; log g), 3.4% (〈 ρ 〉), 2.6% (R), 5.1% (M), and 19% (τ) for the photometric Teff scale and 2% (log g), 3.5% (〈 ρ 〉), 2.7% (R), 6.3% (M), and 23% (τ) for the spectroscopic scale. We present comparisons with stellar quantities in the asteroseismic catalog by Chaplin et al. that highlight the importance of having metallicity measurements for determining stellar parameters accurately. Finally, we compare our results with those coming from a variety of sources, including stellar radii determined from TGAS parallaxes and asteroseismic analyses based on individual frequencies. We find a very good agreement for all inferred quantities. The latter comparison, in particular, gives strong support to the determination of stellar quantities based on global seismology, a relevant result for future missions such as TESS and PLATO.

Original languageEnglish (US)
Article number23
JournalAstrophysical Journal, Supplement Series
Volume233
Issue number2
DOIs
StatePublished - Dec 2017

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subgiant stars
dwarf stars
catalogs
grids
Kepler mission
radii
seismology
random errors
galactic evolution
systematic errors
light curve
metallicity
photometry
observatories
modeling
gravitation
observatory
gravity
experiment

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Serenelli, A., Johnson, J., Huber, D., Pinsonneault, M., Ball, W. H., Tayar, J., ... Zamora, O. (2017). The First APOKASC Catalog of Kepler Dwarf and Subgiant Stars. Astrophysical Journal, Supplement Series, 233(2), [23]. https://doi.org/10.3847/1538-4365/aa97df
Serenelli, Aldo ; Johnson, Jennifer ; Huber, Daniel ; Pinsonneault, Marc ; Ball, Warrick H. ; Tayar, Jamie ; Aguirre, Victor Silva ; Basu, Sarbani ; Troup, Nicholas ; Hekker, Saskia ; Kallinger, Thomas ; Stello, Dennis ; Davies, Guy R. ; Lund, Mikkel N. ; Mathur, Savita ; Mosser, Benoit ; Stassun, Keivan G. ; Chaplin, William J. ; Elsworth, Yvonne ; García, Rafael A. ; Handberg, Rasmus ; Holtzman, Jon ; Hearty, Fred ; García-Hernández, D. A. ; Gaulme, Patrick ; Zamora, Olga. / The First APOKASC Catalog of Kepler Dwarf and Subgiant Stars. In: Astrophysical Journal, Supplement Series. 2017 ; Vol. 233, No. 2.
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author = "Aldo Serenelli and Jennifer Johnson and Daniel Huber and Marc Pinsonneault and Ball, {Warrick H.} and Jamie Tayar and Aguirre, {Victor Silva} and Sarbani Basu and Nicholas Troup and Saskia Hekker and Thomas Kallinger and Dennis Stello and Davies, {Guy R.} and Lund, {Mikkel N.} and Savita Mathur and Benoit Mosser and Stassun, {Keivan G.} and Chaplin, {William J.} and Yvonne Elsworth and Garc{\'i}a, {Rafael A.} and Rasmus Handberg and Jon Holtzman and Fred Hearty and Garc{\'i}a-Hern{\'a}ndez, {D. A.} and Patrick Gaulme and Olga Zamora",
year = "2017",
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language = "English (US)",
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Serenelli, A, Johnson, J, Huber, D, Pinsonneault, M, Ball, WH, Tayar, J, Aguirre, VS, Basu, S, Troup, N, Hekker, S, Kallinger, T, Stello, D, Davies, GR, Lund, MN, Mathur, S, Mosser, B, Stassun, KG, Chaplin, WJ, Elsworth, Y, García, RA, Handberg, R, Holtzman, J, Hearty, F, García-Hernández, DA, Gaulme, P & Zamora, O 2017, 'The First APOKASC Catalog of Kepler Dwarf and Subgiant Stars', Astrophysical Journal, Supplement Series, vol. 233, no. 2, 23. https://doi.org/10.3847/1538-4365/aa97df

The First APOKASC Catalog of Kepler Dwarf and Subgiant Stars. / Serenelli, Aldo; Johnson, Jennifer; Huber, Daniel; Pinsonneault, Marc; Ball, Warrick H.; Tayar, Jamie; Aguirre, Victor Silva; Basu, Sarbani; Troup, Nicholas; Hekker, Saskia; Kallinger, Thomas; Stello, Dennis; Davies, Guy R.; Lund, Mikkel N.; Mathur, Savita; Mosser, Benoit; Stassun, Keivan G.; Chaplin, William J.; Elsworth, Yvonne; García, Rafael A.; Handberg, Rasmus; Holtzman, Jon; Hearty, Fred; García-Hernández, D. A.; Gaulme, Patrick; Zamora, Olga.

In: Astrophysical Journal, Supplement Series, Vol. 233, No. 2, 23, 12.2017.

Research output: Contribution to journalArticle

TY - JOUR

T1 - The First APOKASC Catalog of Kepler Dwarf and Subgiant Stars

AU - Serenelli, Aldo

AU - Johnson, Jennifer

AU - Huber, Daniel

AU - Pinsonneault, Marc

AU - Ball, Warrick H.

AU - Tayar, Jamie

AU - Aguirre, Victor Silva

AU - Basu, Sarbani

AU - Troup, Nicholas

AU - Hekker, Saskia

AU - Kallinger, Thomas

AU - Stello, Dennis

AU - Davies, Guy R.

AU - Lund, Mikkel N.

AU - Mathur, Savita

AU - Mosser, Benoit

AU - Stassun, Keivan G.

AU - Chaplin, William J.

AU - Elsworth, Yvonne

AU - García, Rafael A.

AU - Handberg, Rasmus

AU - Holtzman, Jon

AU - Hearty, Fred

AU - García-Hernández, D. A.

AU - Gaulme, Patrick

AU - Zamora, Olga

PY - 2017/12

Y1 - 2017/12

N2 - We present the first APOKASC catalog of spectroscopic and asteroseismic data for dwarfs and subgiants. Asteroseismic data for our sample of 415 objects have been obtained by the Kepler mission in short (58.5 s) cadence, and light curves span from 30 up to more than 1000 days. The spectroscopic parameters are based on spectra taken as part of the Apache Point Observatory Galactic Evolution Experiment and correspond to Data Release 13 of the Sloan Digital Sky Survey. We analyze our data using two independent Teff scales, the spectroscopic values from DR13 and those derived from SDSS griz photometry. We use the differences in our results arising from these choices as a test of systematic temperature uncertainties and find that they can lead to significant differences in the derived stellar properties. Determinations of surface gravity (log g), mean density (〈 ρ 〉), radius (R), mass (M), and age (τ) for the whole sample have been carried out by means of (stellar) grid-based modeling. We have thoroughly assessed random and systematic error sources in the spectroscopic and asteroseismic data, as well as in the grid-based modeling determination of the stellar quantities provided in the catalog. We provide stellar properties determined for each of the two Teff scales. The median combined (random and systematic) uncertainties are 2% (0.01 dex; log g), 3.4% (〈 ρ 〉), 2.6% (R), 5.1% (M), and 19% (τ) for the photometric Teff scale and 2% (log g), 3.5% (〈 ρ 〉), 2.7% (R), 6.3% (M), and 23% (τ) for the spectroscopic scale. We present comparisons with stellar quantities in the asteroseismic catalog by Chaplin et al. that highlight the importance of having metallicity measurements for determining stellar parameters accurately. Finally, we compare our results with those coming from a variety of sources, including stellar radii determined from TGAS parallaxes and asteroseismic analyses based on individual frequencies. We find a very good agreement for all inferred quantities. The latter comparison, in particular, gives strong support to the determination of stellar quantities based on global seismology, a relevant result for future missions such as TESS and PLATO.

AB - We present the first APOKASC catalog of spectroscopic and asteroseismic data for dwarfs and subgiants. Asteroseismic data for our sample of 415 objects have been obtained by the Kepler mission in short (58.5 s) cadence, and light curves span from 30 up to more than 1000 days. The spectroscopic parameters are based on spectra taken as part of the Apache Point Observatory Galactic Evolution Experiment and correspond to Data Release 13 of the Sloan Digital Sky Survey. We analyze our data using two independent Teff scales, the spectroscopic values from DR13 and those derived from SDSS griz photometry. We use the differences in our results arising from these choices as a test of systematic temperature uncertainties and find that they can lead to significant differences in the derived stellar properties. Determinations of surface gravity (log g), mean density (〈 ρ 〉), radius (R), mass (M), and age (τ) for the whole sample have been carried out by means of (stellar) grid-based modeling. We have thoroughly assessed random and systematic error sources in the spectroscopic and asteroseismic data, as well as in the grid-based modeling determination of the stellar quantities provided in the catalog. We provide stellar properties determined for each of the two Teff scales. The median combined (random and systematic) uncertainties are 2% (0.01 dex; log g), 3.4% (〈 ρ 〉), 2.6% (R), 5.1% (M), and 19% (τ) for the photometric Teff scale and 2% (log g), 3.5% (〈 ρ 〉), 2.7% (R), 6.3% (M), and 23% (τ) for the spectroscopic scale. We present comparisons with stellar quantities in the asteroseismic catalog by Chaplin et al. that highlight the importance of having metallicity measurements for determining stellar parameters accurately. Finally, we compare our results with those coming from a variety of sources, including stellar radii determined from TGAS parallaxes and asteroseismic analyses based on individual frequencies. We find a very good agreement for all inferred quantities. The latter comparison, in particular, gives strong support to the determination of stellar quantities based on global seismology, a relevant result for future missions such as TESS and PLATO.

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Serenelli A, Johnson J, Huber D, Pinsonneault M, Ball WH, Tayar J et al. The First APOKASC Catalog of Kepler Dwarf and Subgiant Stars. Astrophysical Journal, Supplement Series. 2017 Dec;233(2). 23. https://doi.org/10.3847/1538-4365/aa97df