Query : 2002A&A...382..157P

2002A&A...382..157P - Astronomy and Astrophysics, volume 382, 157-163 (2002/1-4)

Asteroseismology from space: The δ Scuti star θ2 Tauri monitored by the WIRE satellite.


Abstract (from CDS):

The bright variable star θ2 Tau was monitored with the star camera on the Wide-Field Infrared Explorer satellite. Twelve independent frequencies were detected down to the 0.5 mmag amplitude level. Their reality was investigated by searching for them using two different algorithms and by some internal checks: both procedures strengthened our confidence in the results. All the frequencies are in the range 10.8-14.6cd–1. The histogram of the frequency spacings shows that 81% are below 1.8cd–1; rotation may thus play a role in the mode excitation. The fundamental radial mode is not observed, although it is expected to occur in a region where the noise level is very low (55µmag). The rms residual is about two times lower than that usually obtained from successful ground-based multisite campaigns. The comparison of the results of previous campaigns with the new ones establishes the amplitude variability of some modes.

Abstract Copyright:

Journal keyword(s): methods: data analysis - techniques: photometric - stars: individual: θ2 Tau - stars: oscillations - stars: variable: δ Sct

Simbad objects: 3

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Number of rows : 3
N Identifier Otype ICRS (J2000)
ICRS (J2000)
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
1 * tet02 Tau dS* 04 28 39.7416111456 +15 52 15.148738380 3.690 3.600 3.410 5.43   A7III 438 0
2 V* XX Pyx dS* 08 58 39.0320074224 -24 35 10.589779932           A4V 82 0
3 V* FG Vir dS* 12 14 15.4565381808 -05 42 59.750820036   6.807 6.558     A8/9V 213 0

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