Solar-like oscillations in Kepler DR25 SC data

DOI

During the survey phase of the Kepler mission, several thousand stars were observed in short cadence, allowing for the detection of solar-like oscillations in more than 500 main-sequence and subgiant stars. These detections showed the power of asteroseismology in determining fundamental stellar parameters. However, the Kepler Science Office discovered an issue in the calibration that affected half of the store of short-cadence data, leading to a new data release (DR25) with corrections on the light curves. In this work, we re-analyzed the one-month time series of the Kepler survey phase to search for solar-like oscillations that might have been missed when using the previous data release. We studied the seismic parameters of 99 stars, among which there are 46 targets with new reported solar-like oscillations, increasing, by around 8%, the known sample of solar-like stars with an asteroseismic analysis of the short-cadence data from this mission. The majority of these stars have mid- to high-resolution spectroscopy publicly available with the LAMOST and APOGEE surveys, respectively, as well as precise Gaia parallaxes. We computed the masses and radii using seismic scaling relations and we find that this new sample features massive stars (above 1.2M_{sun} and up to 2M{sun}_) and subgiants. We determined the granulation parameters and amplitude of the modes, which agree with the scaling relations derived for dwarfs and subgiants. The stars studied here are slightly fainter than the previously known sample of main-sequence and subgiants with asteroseismic detections. We also studied the surface rotation and magnetic activity levels of those stars. Our sample of 99 stars has similar levels of activity compared to the previously known sample and is in the same range as the Sun between the minimum and maximum of its activity cycle. We find that for seven stars, a possible blend could be the reason for the non-detection with the early data release. Finally, we compared the radii obtained from the scaling relations with the Gaia ones and we find that the Gaia radii are overestimated by 4.4%, on average, compared to the seismic radii, with a scatter of 12.3% and a decreasing trend according to the evolutionary stage. In addition, for homogeneity purposes, we re-analyzed the DR25 of the main-sequence and subgiant stars with solar-like oscillations that were previously detected and, as a result, we provide the global seismic parameters for a total of 525 stars.

Cone search capability for table J/A+A/657/A31/table1 (*Global Seismic/non-seismic parameters, stellar)

Cone search capability for table J/A+A/657/A31/table2 (Global Seismic parameters for the 525 stars with previous detection of modes levels of the stars with seismic detection)

Cone search capability for table J/A+A/657/A31/table3 (Rotation periods and photometric magnetic activity properties for 99 stars)

Cone search capability for table J/A+A/657/A31/tableb1 (Global Seismic parameters for the candidates with seismic detection)

Cone search capability for table J/A+A/657/A31/tablee1 (Global Seismic parameters for the full of Kepler dwarfs and subgiants with seismic detection)

Identifier
DOI http://doi.org/10.26093/cds/vizier.36570031
Source https://dc.g-vo.org/rr/q/lp/custom/CDS.VizieR/J/A+A/657/A31
Related Identifier https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/657/A31
Related Identifier http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/657/A31
Metadata Access http://dc.g-vo.org/rr/q/pmh/pubreg.xml?verb=GetRecord&metadataPrefix=oai_b2find&identifier=ivo://CDS.VizieR/J/A+A/657/A31
Provenance
Creator Mathur S.; Garcia R.A.; Breton S.N.; Santos A.R.G.; Mosser B.; Huber D.,Sayeed M.; Bugnet L.; Chontos A.
Publisher CDS
Publication Year 2023
Rights https://cds.unistra.fr/vizier-org/licences_vizier.html
OpenAccess true
Contact CDS support team <cds-question(at)unistra.fr>
Representation
Resource Type Dataset; AstroObjects
Discipline Astrophysics and Astronomy; Natural Sciences; Observational Astronomy; Physics; Stellar Astronomy