2015A&A...579A.133B


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.13CEST07:45:42

2015A&A...579A.133B - Astronomy and Astrophysics, volume 579A, 133-133 (2015/7-1)

Evidence of amplitude modulation due to resonant mode coupling in the δ Scuti star KIC 5892969. A particular or a general case ?

BARCELO FORTEZA S., MICHEL E., ROCA CORTES T. and GARCIA R.A.

Abstract (from CDS):

A study of the star KIC 5892969 observed by the Kepler satellite is presented. Its three highest amplitude modes present a strong amplitude modulation. The aim of this work is to investigate amplitude variations in this star and their possible cause. Using the 4 years-long observations available, we obtained the frequency content of the full light curve. Then, we studied the amplitude and phase variations with time using shorter time stamps. The results obtained are compared with the predicted ones for resonant mode coupling of an unstable mode with lower frequency stable modes. Our conclusion is that resonant mode coupling is consistent as an amplitude limitation mechanism in several modes of KIC 5892969 and we discuss to which extent it might play an important role for other δ Scuti stars.

Abstract Copyright:

Journal keyword(s): asteroseismology - stars: variables: δ Scuti - stars: individual: KIC 5892969 - stars: oscillations

Simbad objects: 7

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Number of rows : 7

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 HD 50870 dS* 06 54 56.7572009816 -03 20 21.929661395   9.17 8.85     F0IV 24 0
2 V* XX Pyx dS* 08 58 39.0320174189 -24 35 10.585991007           A4V 80 0
3 * 4 CVn dS* 12 23 47.0114947753 +42 32 33.866981068   6.382 6.022     F3III-IV 188 0
4 * del Sct dS* 18 42 16.4270465894 -09 03 09.200429056   5.04 4.71     F2II-III 447 0
5 TYC 3129-879-1 dS* 19 11 57.4699270239 +42 40 22.609584566   11.81 11.38     F1V 9 0
6 KIC 5892969 dS* 19 45 36.2787308921 +41 06 26.836926082           A7III 6 0
7 TYC 3149-1207-1 dS* 19 56 53.3598758993 +43 49 26.984838353   11.43 11.18     A2Vn 20 0

    Equat.    Gal    SGal    Ecl

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2020.07.13-07:45:42

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