Testing the Limits of Precise Subgiant Characterization with APOGEE and Gaia: Opening a Window to Unprecedented Astrophysical Studies

Godoy-Rivera, D.; Tayar, Jamie; Pinsonneault, Marc H.; Martínez, Romy Rodríguez; Stassun, Keivan G.; Saders, Jennifer L. van; Beaton, Rachael L.; García–Hernández, D. A.; Teske, Johanna

doi:10.3847/1538-4357/abf8ba

Cited by 16 publications

(11 citation statements)

References 129 publications

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“…Masses from FLAME compare well with asteroseismic estimates for dwarfs and subgiants (using Serenelli et al 2017;Godoy-Rivera et al 2021), but strong outliers are seen for giants (using Yu et al 2018). Comparison with the GUMS model confirms the presence of a high-mass tail in the FLAME data that is not predicted by the model.…”

Section: Stellar Evolution Parametersmentioning

confidence: 56%

GaiaData Release 3

Babusiaux¹,

Fabricius²,

Khanna³

et al. 2023

A&A

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Context. The third Gaia data release (DR3) provides a wealth of new data products. The early part of the release, Gaia EDR3, already provided the astrometric and photometric data for nearly two billion sources. The full release now adds improved parameters compared to Gaia DR2 for radial velocities, astrophysical parameters, variability information, light curves, and orbits for Solar System objects. The improvements are in terms of the number of sources, the variety of parameter information, precision, and accuracy. For the first time, Gaia DR3 also provides a sample of spectrophotometry and spectra obtained with the Radial Velocity Spectrometer, binary star solutions, and a characterisation of extragalactic object candidates. Aims. Before the publication of the catalogue, these data have undergone a dedicated transversal validation process. The aim of this paper is to highlight limitations of the data that were found during this process and to provide recommendations for the usage of the catalogue. Methods. The validation was obtained through a statistical analysis of the data, a confirmation of the internal consistency of different products, and a comparison of the values to external data or models. Results. Gaia DR3 is a new major step forward in terms of the number, diversity, precision, and accuracy of the Gaia products. As always in such a large and complex catalogue, however, issues and limitations have also been found. Detailed examples of the scientific quality of the Gaia DR3 release can be found in the accompanying data-processing papers as well as in the performance verification papers. Here we focus only on the caveats that the user should be aware of to scientifically exploit the data.

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Section: Stellar Evolution Parametersmentioning

confidence: 56%

GaiaData Release 3

Babusiaux¹,

Fabricius²,

Khanna³

et al. 2023

A&A

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“…The ATL was constructed prior to the launch of TESS to provide a prioritised list of targets most likely to yield detections of solar-like oscillations (Schofield et al 2019; see also Fausnaugh et al 2021;Godoy-Rivera et al 2021). Aimed at 120-second cadence data, the list was restricted to stars which would oscillate above the 30-minute FFI Nyquist frequency.…”

Section: Target Selectionmentioning

confidence: 99%

A Catalogue of Solar-Like Oscillators Observed by TESS in 120-second and 20-second Cadence

Hatt¹,

Nielsen²,

Chaplin³

et al. 2022

Preprint

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Context. The Transiting Exoplanet Survey Satellite (TESS) mission has provided photometric light curves for stars across nearly the entire sky. This allows for the application of asteroseismology to a pool of potential solar-like oscillators that is unprecedented in size. Aims. We aim to produce a catalogue of solar-like oscillators observed by TESS in the 120-second and 20-second cadence modes. The catalogue is intended to highlight stars oscillating at frequencies above the TESS 30-minute cadence Nyquist frequency with the purpose of encompassing the main sequence and sub-giant evolutionary phases. We aim to provide estimates for the global asteroseismic parameters ν max and ∆ν. Methods. We apply a new probabilistic detection algorithm to the 120-second and 20-second light curves of over 250,000 stars. This algorithm flags targets that show characteristic signatures of solar-like oscillations. We manually vet the resulting list of targets to confirm the presence of solar-like oscillations. Using the probability densities computed by the algorithm, we measure the global asteroseismic parameters ν max and ∆ν. Results. We produce a catalogue of 4,177 solar-like oscillators, reporting ∆ν and ν max for 98% of the total star count. The asteroseismic data reveals vast coverage of the HR diagram, populating the red giant branch, the subgiant regime and extending toward the mainsequence. Conclusions. A crossmatch with external catalogs shows that 25 of the detected solar-like oscillators are a component of a spectroscopic binary, and 28 are confirmed planet host stars. These results provide the potential for precise, independent asteroseismic constraints on these and any additional TESS targets of interest.

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“…By combining these parameters with parallaxes, one can estimate stellar radius and luminosity. Recent examples of such implementation include studies dedicated to determining stellar parameters for Hipparcos and Tycho stars (McDonald et al 2012(McDonald et al , 2017, and for subgiants in the TESS southern CVZ (Godoy-Rivera et al 2021).…”

Section: Introductionmentioning

confidence: 99%

“…It is worth noting that SED fitting does not depend independently on effective temperature (T eff ) and extinction; we refer to such variables as degenerate variables (e.g., Bailer-Jones 2011; Andrae et al 2018). The studies mentioned above either assume zero extinction (Mc-Donald et al 2012 or use a typical extinction estimate for the entire sample (Godoy-Rivera et al 2021). These assumptions are legitimate for particular stellar samples, e.g.…”

Section: Introductionmentioning

confidence: 99%

Revised extinctions and radii for 1.5 million stars observed by APOGEE, GALAH, and RAVE

Yu¹,

Khanna²,

Themeßl³

et al. 2022

Preprint

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Asteroseismology has become widely accepted as a benchmark for accurate and precise fundamental stellar properties. It can therefore be used to validate and calibrate stellar parameters derived from other approaches. Meanwhile, one can leverage archival and ongoing large-volume surveys in photometry, spectroscopy, and astrometry to infer stellar parameters over a wide range of evolutionary stages, independently of asteroseismology. Our pipeline, SEDEX, compares the spectral energy distribution predicted by the MARCS and BOSZ model spectra with 32 photometric bandpasses, combining data from 9 major, large-volume photometric surveys. We restrict the analysis to targets with available spectroscopy to lift the temperature-extinction degeneracy. Validation of our method and results with CHARA interferometry, HST CALSPEC spectrophotometry, and asteroseismology, shows that we achieve high precision and accuracy. We present improved interstellar extinction (σ A V 0.08 mag) and stellar radii (σ R /R 3.6%) for ∼1.5 million stars in the low-to high-extinction (A V 6 mag) fields observed by the APOGEE, GALAH, and RAVE spectroscopic surveys. We derive global extinctions for 191 Gaia DR2 open clusters. We confirm the differential extinction in NGC 6791 (A V = 0.2 to 0.6 mag) and NGC 6819 (A V = 0.4 to 0.6 mag) that have been subject to extensive asteroseismic analysis.

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Testing the Limits of Precise Subgiant Characterization with APOGEE and Gaia: Opening a Window to Unprecedented Astrophysical Studies

Cited by 16 publications

References 129 publications

GaiaData Release 3

GaiaData Release 3

A Catalogue of Solar-Like Oscillators Observed by TESS in 120-second and 20-second Cadence

Revised extinctions and radii for 1.5 million stars observed by APOGEE, GALAH, and RAVE

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