2014A&A...568A..10G


C.D.S. - SIMBAD4 rel 1.7 - 2020.09.30CEST18:24:55

2014A&A...568A..10G - Astronomy and Astrophysics, volume 568A, 10-10 (2014/8-1)

Impact on asteroseismic analyses of regular gaps in Kepler data.

GARCIA R.A., MATHUR S., PIRES S., REGULO C., BELLAMY B., PALLE P.L., BALLOT J., BARCELO FORTEZA S., BECK P.G., BEDDING T.R., CEILLIER T., ROCA CORTES T., SALABERT D. and STELLO D.

Abstract (from CDS):

The NASA Kepler mission has observed more than 190 000 stars in the constellations of Cygnus and Lyra. Around 4 years of almost continuous ultra high-precision photometry have been obtained reaching a duty cycle higher than 90% for many of these stars. However, almost regular gaps due to nominal operations are present in the light curves on different time scales. In this paper we want to highlight the impact of those regular gaps in asteroseismic analyses, and we try to find a method that minimizes their effect on the frequency domain. To do so, we isolate the two main time scales of quasi regular gaps in the data. We then interpolate the gaps and compare the power density spectra of four different stars: two red giants at different stages of their evolution, a young F-type star, and a classical pulsator in the instability strip. The spectra obtained after filling the gaps in the selected solar-like stars show a net reduction in the overall background level, as well as a change in the background parameters. The inferred convective properties could change as much as ∼200% in the selected example, introducing a bias in the p-mode frequency of maximum power. When asteroseismic scaling relations are used, this bias can lead to a variation in the surface gravity of 0.05 dex. Finally, the oscillation spectrum in the classical pulsator is cleaner than the original one.

Abstract Copyright:

Journal keyword(s): asteroseismology - methods: data analysis - stars: oscillations

Simbad objects: 18

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Number of rows : 18

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 BD+47 2683 * 18 43 42.4230070169 +47 56 16.007259287   9.85 9.26     G0V 54 0
2 KIC 9508595 RG* 18 48 59.3224752145 +46 06 49.522350671           G5V: 7 0
3 KIC 8936339 RG* 18 57 51.1011971171 +45 16 18.497509433           K1IV 14 0
4 HD 178509 Ro* 19 06 55.9483071065 +42 40 19.337596523   9.39 8.86     F8IV 43 0
5 HD 178688 * 19 07 43.5917073663 +41 56 15.729857285   9.48 9.02     F6IV 35 0
6 HD 178971 Ro* 19 09 01.9440013031 +38 53 59.483977067   8.79 8.36     F5IV-V 52 0
7 HD 234856 Ro* 19 17 45.8021284617 +50 28 48.273320177   9.87 9.32     F9IV-V 65 0
8 KIC 10139564 HS* 19 24 58.1495860117 +47 07 53.671623446           sdB 27 0
9 BD+36 3570 Ro* 19 28 19.8470073047 +37 03 35.395152315   9.40 8.97     F8IV 49 0
10 KIC 2305930 RG* 19 28 25.6367317364 +37 41 23.240529614   12.20 11.02     G8IIIb 22 0
11 TYC 3143-53-1 Ro* 19 35 03.7375425270 +42 44 16.720275774   10.31 9.85     F8IV 50 0
12 KIC 9596106 RG* 19 39 51.9581083528 +46 14 40.506510307           K1III 11 0
13 KIC 5892969 dS* 19 45 36.2787308921 +41 06 26.836926082           A7III 6 0
14 KIC 8905990 LP* 19 53 04.8071905008 +45 10 35.024129509   12.89 12.87   8.876 M1.5II-III 4 0
15 KIC 9112472 RG* 19 55 43.7857335452 +45 27 33.049224656           ~ 9 0
16 KIC 9364778 RG* 19 57 08.5136911914 +45 50 46.684433625           G8IIp 7 0
17 KIC 9240941 RG* 19 57 10.6126147351 +45 37 36.362258581   12.67 11.74     G6V 9 0
18 KIC 9427247 RG* 19 58 31.4157448068 +45 56 50.267224374           ~ 8 0

    Equat.    Gal    SGal    Ecl

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2020.09.30-18:24:55

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