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The p-mode spectrum of ɣ Equ (HR 8097)

Martinez, Peter and Weiss, W. W. and Nelson, M. J. and Kreidl, T. J. and Roberts, G. R. and Mkrtichian, D. E. and Dorokhov, N. I. and Dorokhova, T. N. and Birch, P. V. (1996) The p-mode spectrum of ɣ Equ (HR 8097). Monthly Notices of the Royal Astronomical Society, 282. pp. 243-251. ISSN 1365-2966


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We present new high-speed photometric observations of the rapidly oscillating Ap (roAp) star ɣ Equ acquired on 26 nights during 1992, A frequency analysis of these observations reveals the presence of four p modes with frequencies of 1339, 1366, 1397 and 1427 μHz. These frequencies are all roughly equally spaced by about 30 μHz, which we interpret as the spacing of alternating even and odd ℓ modes for a slightly evolved A-type star, This interpretation leads to an asteroseismological luminosity estimate for ɣ Equ of M(V)(Δv) = 1.8, which is in good agreement with the parallax luminosity M(V)(pi) = 1.9.

Item Type: Article
Publisher’s Statement: This article was published in Monthly Notices of the Royal Astronomical Society ©: 1996 Royal Astronomical Society. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.
Keywords: equulei; linear polarimetry; oscillating ap-stars; peculiar; stars, chemically peculiar; stars, individual, HR 8097; stars, oscillations; unequally-spaced data
Subjects: Q Science > QB Astronomy
NAU Depositing Author Academic Status: Faculty/Staff
Department/Unit: College of Engineering, Forestry, and Natural Science > Physics and Astronomy
Date Deposited: 18 Oct 2015 19:47
URI: http://openknowledge.nau.edu/id/eprint/1040

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