2013A&A...557A..79L


C.D.S. - SIMBAD4 rel 1.7 - 2019.10.21CEST23:19:06

2013A&A...557A..79L - Astronomy and Astrophysics, volume 557A, 79-79 (2013/9-1)

Physical properties of the eclipsing δ Scuti star KIC 10661783.

LEHMANN H., SOUTHWORTH J., TKACHENKO A. and PAVLOVSKI K.

Abstract (from CDS):

object{KIC 10661783} is an eclipsing binary that shows δ Scuti-like oscillations. More than 60 pulsation frequencies have been detected in its light curve as observed by the Kepler satellite. We want to determine the fundamental stellar and system parameters of the eclipsing binary as a precondition for asteroseismic modelling of the pulsating component and to establish whether the star is a semi-detached Algol-type system. We measured the radial velocities of both components from new high-resolution spectra using TODCOR and compute the orbit using PHOEBE. We used the KOREL program to decompose the observed spectra into its components, and analysed the decomposed spectra to determine the atmospheric parameters. For this, we developed a new computer program for the normalisation of the KOREL output spectra. Fundamental stellar parameters are determined by combining the spectroscopic results with those from the analysis of the Kepler light curve. We obtain Teff, logg, vsin i, and the absolute masses and radii of the components, together with their flux ratio and separation. Whereas the secondary star rotates synchronously with the orbital motion, the primary star rotates subsynchronously by a factor of 0.75. The newly determined mass ratio of 0.0911 is higher than previously thought and means a detached configuration is required to fit the light curve. With its low orbital period and very low mass ratio, the system shows characteristics of the RCMa-type stars but differs from this group by being detached. Its current state is assumed to be that of a detached post-Algol binary system with a pulsating primary component.

Abstract Copyright:

Journal keyword(s): asteroseismology - binaries: eclipsing - stars: variables: δ Scuti - stars: fundamental parameters - stars: abundances

VizieR on-line data: <Available at CDS (J/A+A/557/A79): hjd.dat sp/*>

Simbad objects: 10

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Number of rows : 10

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2019
#notes
1 NGC 104 GlC 00 24 05.359 -72 04 53.20   5.78 4.09     ~ 3463 0
2 OGLE SMC-ECL- 63 Al* 00 26 08.86 -72 07 01.6   16.12 15.844   15.482 ~ 21 0
3 HD 18541 Al* 03 00 05.7094158688 +39 11 24.907845803   9.83 9.61 9.62   A3V+K1-2IV 127 0
4 V* AS Eri Al* 03 32 25.1262238528 -03 18 48.096045754   8.49 8.30     A1V 157 0
5 V* AS Cam Al* 05 29 46.9126130257 +69 29 45.381086699   8.59 8.60     A0 145 1
6 V* R CMa Al* 07 19 28.1782479807 -16 23 42.900652548 6.09 6.05 5.70     F2III/IV 261 0
7 * alf CrB Al* 15 34 41.26800 +26 42 52.8940 2.19 2.22 2.24 2.21 2.25 A1IV 451 0
8 V* XZ Sgr Al* 18 22 06.7704634239 -25 14 23.840994391   9.29 8.94     A2/3(IV) 79 0
9 TYC 3547-2135-1 bL* 19 21 11.6185430446 +47 58 42.954059789   9.79 9.53   9.330 A5IV 42 0
10 V* AR Cas Al* 23 30 01.9402842213 +58 32 56.100198639 4.18 4.760 4.886     B3V 196 1

    Equat.    Gal    SGal    Ecl

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2019.10.21-23:19:06

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