2017A&A...604A..42R


Query : 2017A&A...604A..42R

2017A&A...604A..42R - Astronomy and Astrophysics, volume 604A42-42 (2017/8-1)

Anomalies in the Kepler Asteroseismic Legacy Project Data A re-analysis of 16 Cyg A & B, KIC 8379927 and 6 solar-like stars.

ROXBURGH I.W.

Abstract (from CDS):

I compare values of the frequencies, separation ratios, errors and covariance matrices from a new analysis of 9 solar-like stars with the Legacy project values reported by Lund et al and, for 16Cyg A&B and KIC 8379927, with values derived by Davies et al. There is good agreement between my results and Davies's for these 3 stars, but no such agreement with the Legacy project results. My frequencies differ from the Legacy values, there are inconsistencies in the Legacy frequency covariance matrices which are not positive definite, and the Legacy errors on separation ratios are up to 40 times larger than mine and the values and upper limits derived from the Legacy frequency covariances. There are similar anomalies for 6 other solar-like stars: frequencies and separation ratio errors disagree and 2 have non positive definite covariance matrices. There are inconsistencies in the covariance matrices of 27 the 66 stars in the full Legacy set and problems with the ratio errors for the vast majority of these stars.

Abstract Copyright: © ESO, 2017

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

Simbad objects: 13

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Number of rows : 13
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026
#notes
1 HD 177153 PM* 19 01 39.6780721176 +41 29 24.328113936   7.76 7.21     G0 133 0
2 TYC 3541-2345-1 Em* 19 02 09.8972932896 +45 16 39.357745608   10.90 10.21     G3V 57 0
3 BD+38 3428 PM* 19 05 45.2617733112 +38 31 22.560830328   9.77 9.22     F9IV-V 78 0
4 HD 181207 PM* 19 17 46.3565007888 +41 24 36.838219932   9.06 8.47     F9IV-V 105 0
5 BD+41 3338 Em* 19 24 11.1933479232 +42 03 09.726975180   9.97 9.19     G8IV-V 85 0
6 TYC 3560-2509-1 Em* 19 33 52.7745159792 +47 02 44.511974340   10.76 10.21     G0V 69 0
7 BD+44 3197 PM* 19 37 54.5252033200 +44 59 04.630621506   10.287 9.641 9.546   G0IV 82 0
8 TYC 3556-3445-1 SB* 19 40 21.2108930904 +45 29 20.963746392   10.48 9.91     G3V 87 0
9 * 16 Cyg A ** 19 41 48.9534996168 +50 31 30.219536784 6.79 6.59 5.95 5.50 5.17 G1.5Vb 814 0
10 * 16 Cyg B PM* 19 41 51.9726777456 +50 31 03.089030916 7.07 6.86 6.20 5.76 5.42 G3V 949 1
11 TYC 3557-1752-1 * 19 44 10.6859489280 +45 53 21.115385016   11.39 10.86     ~ 38 0
12 HD 187160 SB* 19 46 41.3411982432 +44 20 54.601189476   7.650 7.083     F9IV-V 114 0
13 HD 187637 PM* 19 49 18.1388793264 +41 34 56.859084552       7.2   F8V 132 0

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