Frequency and mode identification of gamma Doradus from photometric and spectroscopic observations

Brunsden, E. and Pollard, K. R. and Wright, D. J. and De Cat, P. and Cottrell, P. L. (2018) Frequency and mode identification of gamma Doradus from photometric and spectroscopic observations. Monthly Notices of the Royal Astronomical Society, 475 (3). pp. 3813-3822. ISSN 0035-8711

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Abstract

The prototype star for the gamma Doradus class of pulsating variables was studied employing photometric and spectroscopic observations to determine the frequencies and modes of pulsation. The four frequencies found are self-consistent between the observation types and almost identical to those found in previous studies (1.3641 d(-1), 1.8783 d(-1), 1.4742 d(-1), and 1.3209 d(-1)). Three of the frequencies are classified as l, m = (1, 1) pulsations and the other is ambiguous between l, m = (2, 0) and (2, -2) modes. Two frequencies are shown to be stable over 20 yr since their first identification. The agreement in ground-based work makes this star an excellent calibrator between high-precision photometry and spectroscopy with the upcoming TESS observations and a potential standard for continued asteroseismic modelling.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Published version deposited in accordance with the copyright policy of the publisher.
Faculty/School / Institute/Centre: No Faculty
Faculty/School / Institute/Centre: No Faculty
Date Deposited: 02 Sep 2019 05:12
Last Modified: 10 Sep 2019 04:06
Uncontrolled Keywords: line profiles, techniques spectroscopic, stars oscillations, stars variables: general
Fields of Research : 02 Physical Sciences > 0201 Astronomical and Space Sciences > 020110 Stellar Astronomy and Planetary Systems
Identification Number or DOI: 10.1093/mnras/sty034
URI: http://eprints.usq.edu.au/id/eprint/36372

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