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Asteroseismology from space: The δ Scuti star θ^2 Tauri monitored by the WIRE satellite

Poretti, E. and Buzasi, D. and Laher, R. and Catanzarite, J. and Conrow, T. (2002) Asteroseismology from space: The δ Scuti star θ^2 Tauri monitored by the WIRE satellite. Astronomy & Astrophysics, 382 (1). pp. 157-163. ISSN 0004-6361. doi:10.1051/0004-6361:20011623.

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The bright variable star θ^2 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 10.8–14.6 cd^(-1). The histogram of the frequency spacings shows that 81% are below 1.8 cd^(-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 (55 μmag). 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.

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Laher, R.0000-0003-2451-5482
Alternate Title:Asteroseismology from space: The δ Scuti star θ2 Tauri monitored by the WIRE satellite
Additional Information:© 2002 ESO. Received: 16 October 2001. Accepted: 7 November 2001. We gratefully acknowledge the support of Harley Thronson, Phillipe Crane, Daniel Golombek, and Joe Bredekamp at NASA Headquarters for making this use of WIRE possible. The hard work of many people, including the WIRE operations and spacecraft teams at GSFC and the timeline generation team at IPAC, was essential to the success of this project. While it is impractical to single out everyone who contributed, we would particularly like to thank Carol Lonsdale at IPAC and David Everett and Patrick Crouse at GSFC for their efforts above and beyond the call of duty.
Group:Infrared Processing and Analysis Center (IPAC)
Funding AgencyGrant Number
Subject Keywords:methods: data analysis - techniques: photometric - stars: individual: θ^2 Tau - stars: oscillations - stars: variable: δ Sct
Issue or Number:1
Record Number:CaltechAUTHORS:20180228-072744164
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Official Citation:Asteroseismology from space: The δ Scuti star θ2 Tauri monitored by the WIRE satellite E. Poretti, D. Buzasi, R. Laher, J. Catanzarite and T. Conrow A&A, 382 1 (2002) 157-163 DOI:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:84980
Deposited By: Ruth Sustaita
Deposited On:28 Feb 2018 19:46
Last Modified:15 Nov 2021 20:24

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