2021AJ....161...27Y


C.D.S. - SIMBAD4 rel 1.7 - 2021.05.18CEST15:42:51

2021AJ....161...27Y - Astron. J., 161, 27-27 (2021/January-0)

KIC 10975348: a double-mode or triple-mode high-amplitude δ Scuti star?

YANG T.-Z., SUN X.-Y., ZUO Z.-Y. and LIU H.-W.

Abstract (from CDS):

In this paper, we analyze the light variations of KIC 10975348 using photometric data delivered from the Kepler mission. This star is exceptionally faint (Kp = 18.6 mag) compared to most well-studied δ Scuti stars. The Fourier analysis of the short-cadence data (i.e., Q14, Q15, and Q16, spanning 220 days) reveals that the variations are dominated by the strongest mode with a frequency of F0 = 10.231899 day–1, which is compatible with that obtained from RATS-Kepler. The other two independent modes with F1 (=13.4988 day–1) and F2 (=19.0002 day–1) are newly detected and have amplitudes two orders of magnitude smaller than F0. We note that, for the first time, this star is identified to be a high-amplitude δ Sct (HADS) star with an amplitude of about 0.7 mag, and the lower ratio of F0/F1 = 0.758 suggests that it might be a metal-rich variable star. The frequency F2 may be a third overtone mode, suggesting that this target might be a new radial triple-mode HADS star. We perform an O - C analysis using 1018 newly determined times of maximum light and derive an ephemeris formula of Tmax = 2456170.241912(0)+0.097734(1) x E. The O - C diagram shows that the pulsation period of KIC 10975348 seems to show no obvious change, which is in contrast to that of the majority of HADS stars. The possible cause of that may be due to the current short time span of the observations. To verify its possible period variations, regular observation from space with a longer time span in the future is needed.

Abstract Copyright: © 2020. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Stellar oscillations - Delta Scuti variable stars - Short period variable stars

Status at CDS : Associated data (images, light curves, etc...) being ingested in VizieR.

Simbad objects: 16

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Number of rows : 16

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 V* V823 Cas V* 00 05 42.3927443039 +63 24 14.189752972   11.74 11.15     ~ 18 0
2 V* GP And dS* 00 55 18.1501377373 +23 09 49.371535110   10.96 10.79     A3 85 0
3 V* DO CMi dS* 07 12 19.4091872012 +09 21 02.649713971   10.97 10.54     ~ 6 0
4 V* BE Lyn dS* 09 18 17.1803265020 +46 09 11.313469538 9.110 9.040 8.800     A3 70 0
5 V* VX Hya dS* 09 45 46.8526919435 -12 00 14.396000682   11.2 10.5     F2-8Ib 79 0
6 V* YZ Boo dS* 15 24 06.9993379382 +36 52 00.600888929 10.62 10.54 10.36     F0 113 1
7 ASAS J191501+4113.9 dS* 19 15 00.5413484205 +41 13 55.386156202     13.516   12.950 ~ 13 0
8 KIC 10975348 dS* 19 26 46.1127727862 +48 25 30.651502350           A 4 0
9 V* V2367 Cyg dS* 19 34 45.5907072837 +45 54 16.306743726   11.54 11.48   10.960 F0III 26 0
10 KIC 10284901 V*? 19 43 46.37760 +47 20 32.3376           A 3 0
11 V* V829 Aql EB* 19 46 57.2819427369 +03 30 28.482035471   10.74 10.06     F5 19 0
12 TYC 3144-595-1 dS* 19 48 02.9172637767 +41 46 55.764557708   11.23 10.63   10.223 F6II 10 0
13 V* XX Cyg SX* 20 03 15.6422423360 +58 57 16.525128223   11.99 11.86     A5-F5 114 0
14 V* DY Peg SX* 23 08 51.1855512550 +17 12 55.998206149   10.56 10.26     F5 196 1
15 V* AC And RR* 23 18 02.3463522936 +48 46 58.339548112   11.48 10.90     F5 78 0
16 V* BS Aqr dS* 23 48 46.0157283594 -08 08 44.566281103   9.787 9.399     A8III 106 0

    Equat.    Gal    SGal    Ecl

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2021.05.18-15:42:51

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