2011A&A...526L..10H


C.D.S. - SIMBAD4 rel 1.7 - 2019.10.18CEST22:18:39

2011A&A...526L..10H - Astronomy and Astrophysics, volume 526, L10-10 (2011/2-1)

WASP-33: the first δ Scuti exoplanet host star.

HERRERO E., MORALES J.C., RIBAS I. and NAVES R.

Abstract (from CDS):

We report the discovery of photometric oscillations in the host star of the exoplanet WASP-33 b (HD 15082). The data were obtained in the R band in both transit and out-of-transit phases from the 0.3-m telescope and the Montcabrer Observatory and the 0.8-m telescope at the Montsec Astronomical Observatory. Proper fitting and subsequent removal of the transit signal reveals stellar photometric variations with a semi-amplitude of about 1mmag. The detailed analysis of the periodogram yields a structure of significant signals around a frequency of 21 cyc/d, which is typical of δ Scuti-type variable stars. An accurate study of the power spectrum reveals a possible commensurability with the planet orbital motion with a factor of 26, but this remains to be confirmed with additional time-series data that will permit the identification of the significant frequencies. These findings make WASP-33 the first transiting exoplanet host star with δ Sct variability and a very interesting candidate to search for star-planet interactions.

Abstract Copyright:

Journal keyword(s): stars: variables: δ Scuti - stars: oscillations - techniques: photometric - asteroseimology

VizieR on-line data: <Available at CDS (J/A+A/526/L10): table1.dat table2.dat table3.dat table4.dat>

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 - 2019
#notes
1 HD 15082 dS* 02 26 51.0582746497 +37 33 01.737746137   8.41 8.14     kA5hA8mF4 127 1
2 HD 15082b Pl 02 26 51.0582746497 +37 33 01.737746137           ~ 155 1
3 V* FG Vir dS* 12 14 15.4567370777 -05 42 59.750421714   6.807 6.558     A8/9V 207 0
4 * mu. Ara PM* 17 44 08.7036342277 -51 50 02.591049123   5.85 5.15     G3IV-V 455 2
5 BD+47 2846 Er* 19 28 59.3538131541 +47 58 10.216250846   10.97 10.48     F6V 240 2
6 V* V391 Peg HS* 22 04 12.1044101613 +26 25 07.820507559   14.41 14.61 15.00   sdB 99 2
7 V* CK Ind gD* 22 04 38.4299738040 -64 43 42.007848070   7.57 7.32     A9/F0V-IV 76 0

    Equat.    Gal    SGal    Ecl

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2019.10.18-22:18:39

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