2022A&A...657A..31M


Query : 2022A&A...657A..31M

2022A&A...657A..31M - Astronomy and Astrophysics, volume 657A, 31-31 (2022/1-1)

Detections of solar-like oscillations in dwarfs and subgiants with Kepler DR25 short-cadence data.

MATHUR S., GARCIA R.A., BRETON S., SANTOS A.R.G., MOSSER B., HUBER D., SAYEED M., BUGNET L. and CHONTOS A.

Abstract (from CDS):

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 1.2 M and up to 2 M) 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.

Abstract Copyright: © ESO 2021

Journal keyword(s): asteroseismology - stars: solar-type - stars: activity - stars: rotation - stars: fundamental parameters - methods: data analysis

VizieR on-line data: <Available at CDS (J/A+A/657/A31): table1.dat table2.dat table3.dat tableb1.dat tablee1.dat>

Status at CDS : Tables of objects will be appraised for possible ingestion in SIMBAD.

Simbad objects: 24

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Number of rows : 24
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 TYC 3531-1243-1 SB* 18 44 51.2528953176 +48 06 24.994285200   11.00 10.45     F5V 6 0
2 TYC 3126-1317-1 * 18 45 09.6797 +42 53 53.255   12.74 12.20     G8IV-V 4 0
3 UCAC4 663-070561 * 18 49 45.2950704480 +42 35 55.891830732   12.287 11.756 11.609   ~ 4 0
4 BD+44 3027 ** 18 58 15.718680 +44 23 16.27908   9.96 9.40 9.37   F3V 8 0
5 TYC 3132-1223-1 SB* 19 06 27.5690389008 +43 22 02.303792868   11.07 10.38     F6IV-Vs 7 0
6 HD 178874 Er* 19 07 46.8467101920 +49 29 07.269742032   7.82 7.37     F2V 28 0
7 TYC 3133-537-1 * 19 14 31.0310194896 +43 13 52.425947388   12.02 11.10     G1V 5 0
8 TYC 3546-420-1 * 19 15 45.0997852320 +48 24 55.154060460   12.23 11.47     G4V 2 0
9 TYC 3121-5-1 Ro* 19 18 52.1158973424 +39 19 59.889648324   10.31 9.67     G2V 13 0
10 TYC 3146-1150-1 * 19 27 09.1359700176 +44 04 48.100920564   11.93 11.42     F3/F5V 3 0
11 TYC 3134-279-1 * 19 28 23.1986824320 +37 51 31.348274040   12.21 11.47     ~ 5 0
12 TYC 3547-2298-1 * 19 28 56.1541592832 +47 24 43.864475472   12.40 11.89     G1V 8 0
13 TYC 3556-2434-1 * 19 30 55.9527865200 +46 45 55.320651828   11.92 11.25     F8V 4 0
14 TYC 3556-876-1 * 19 32 58.4087019096 +46 47 16.154599164   12.33 11.64     G2V 5 0
15 TYC 3135-346-1 Ro* 19 33 01.7693008128 +38 17 32.096365224   11.35 10.66     F8V 7 0
16 TYC 3556-1427-1 * 19 33 13.5289255248 +46 07 37.409481048   11.17 10.66     F6IV-Vs 6 0
17 BD+46 2732 Ro* 19 35 23.7066411432 +46 26 01.112926704   9.58 9.15     F6IV 12 0
18 TYC 3564-1321-1 * 19 36 34.9399481304 +50 04 35.549073912   12.03 11.52     F7IV 2 0
19 Kepler-910 Ro* 19 44 11.3667063480 +42 44 34.765024740   11.86 11.44     F7V 36 0
20 HD 186959 Er* 19 45 44.5940395968 +39 30 13.179803004   9.13 8.59     K0III 28 0
21 TYC 3141-1944-1 * 19 54 36.2221932504 +41 03 28.331407332   12.42 11.39     G5V: 4 0
22 TYC 3149-1525-1 PM* 19 56 18.1755250392 +43 22 26.001796476   12.14 11.55     ~ 4 0
23 TYC 3558-11-1 * 19 57 18.9731166408 +46 47 52.994686272   11.74 11.12     F6IV 4 0
24 TYC 3162-219-1 * 20 00 59.3963030280 +44 42 51.505966512   11.13 10.59     F7V 6 0

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2023.01.31-02:41:00

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