2019MNRAS.484.3935D

Query : 2019MNRAS.484.3935D

2019MNRAS.484.3935D - Mon. Not. R. Astron. Soc., 484, 3935-3940 (2019/April-2)

A wavelet analysis of photometric variability in Kepler white dwarf stars.

DE LIRA S.R., BRAVO J.P., LEAO I.C., DA COSTA A.D., CANTO MARTINS B.L., DE FREITAS D.B. and DE MEDEIROS J.R.

Abstract (from CDS):

This work describes a wavelet analysis of 14 Kepler white dwarf stars, in order to confirm their photometric variability behaviour and to search for periodicities in these targets. From the observed Kepler light curves we obtained the wavelet local and global power spectra. Through this procedure, one can perform an analysis in the time-frequency domain rich in detail, and so obtain a new perspective on the time evolution of the periodicities present in these stars. We identified a photometric variability behaviour in 10 white dwarfs, corresponding to period variations of ∼2 h to 18 d: among these stars, three are new candidates and seven, earlier identified from other studies, are confirmed.

Abstract Copyright: © 2019 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): stars: white dwarfs - methods: data analysis - techniques: photometric

Simbad objects: 14

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Number of rows : 14
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 2MASS J18544506+4105153 WD* 18 54 45.0434637624 +41 05 15.363027312           DA0 6 0
2 KIC 6669882 WD* 18 55 46.0435502688 +42 07 04.324188144           DA 9 0
3 GALEX J185743.5+453218 WD* 18 57 43.7360371824 +45 32 19.119104844           DA 8 0
4 GALEX J185747.2+490939 WD* 18 57 47.1831709680 +49 09 38.838650004   16.43 16.39     DA 13 0
5 SDSS J190522.52+383133.2 WD* 19 05 22.5169385064 +38 31 33.172868532           DA 9 0
6 PM J19099+4717 WD* 19 09 59.3507240712 +47 17 10.044603240 15.82         DA 13 0
7 PM J19141+4936 WD* 19 14 08.9704125984 +49 36 41.000616036           DA 13 0
8 PM J19173+4452 WD* 19 17 20.5625489472 +44 52 39.382815396           DA 17 0
9 2MASS J19192767+3958392 WD* 19 19 27.6878900856 +39 58 39.465186132           DA3 17 0
10 KIC 6862653 WD* 19 26 46.0135812216 +42 19 35.220341064           DB 7 0
11 PM J19409+4240 ** 19 40 59.3658385872 +42 40 31.441013004           DA+DA 13 0
12 KIC 11514682 WD* 19 41 12.533160 +49 25 07.09428       15.871   K7V 8 0
13 1RXS J194343.1+500440 WD* 19 43 43.6811875272 +50 04 37.921728648   14.320 14.717 15.039   DA1.4 54 0
14 2MASS J19491458+4734460 WD* 19 49 14.5807623120 +47 34 45.906310488           DA 16 0

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