2008A&A...492..167T


Query : 2008A&A...492..167T

2008A&A...492..167T - Astronomy and Astrophysics, volume 492, 167-169 (2008/12-2)

SMEI observations of previously unseen pulsation frequencies in γ Doradus.

TARRANT N.J., CHAPLIN W.J., ELSWORTH Y.P., SPRECKLEY S.A. and STEVENS I.R.

Abstract (from CDS):

As g-mode pulsators, gamma-Doradus-class stars may naievely be expected to show a large number of modes. Taking advantage of the long photometric time-series generated by the solar mass ejection imager (SMEI) instrument, we have studied the star gamma Doradus to determine whether any other modes than the three already known are present at observable amplitude. High-precision photometric data from SMEI taken between April 2003 and March 2006 were subjected to periodogram analysis with the PERIOD04 package. We confidently determine three additional frequencies at 1.39, 1.87, and 2.743/d. These are above and beyond the known frequencies of 1.320, 1.364, and 1.47/d. Two of the new frequencies, at 1.39 and 1.87/d, are speculated to be additional modes of oscillation, with the third frequency at 2.743/d a possible combination frequency.

Abstract Copyright:

Journal keyword(s): stars: individual: γ Doradus - stars: oscillations - stars: early-type - stars: variables: general

Simbad objects: 2

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Number of rows : 2
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 * alf UMi cC* 02 31 49.09456 +89 15 50.7923 3.00 2.62 2.02 1.53 1.22 F8Ib 649 2
2 * gam Dor gD* 04 16 01.5866224848 -51 29 11.932714356   4.55 4.20     F1V 299 0

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2022.11.28-12:05:37

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