Bibcode
Creevey, O. L.; Telting, J.; Belmonte, J. A.; Brown, T. M.; Handler, G.; Metcalfe, T. S.; Pinheiro, F.; Sousa, S.; Terrell, D.; Zhou, A.
Bibliographical reference
Astronomische Nachrichten, Vol.331, Issue 9/10, p.952
Advertised on:
12
2010
Citations
3
Refereed citations
3
Description
We present a preliminary spectroscopic analysis of the binary system
V577Oph, observed during the summer of 2007 on the 2.6 m NOT telescope
on La Palma. We have obtained time series spectroscopic observations,
which show clear binary motion as well as radial velocity variations due
to pulsation in the primary star. By modelling the radial velocities we
determine a full orbital solution of the system, which yields {M_A
sin3 i = 1.562 ± 0.012} M&sun; and {M_B
sin3 i = 1.461 ± 0.020} M&sun;. An estimate
of inclination from photometry yields a primary mass of ˜ 1.6
M&sun;. Using this derived mass, and the known pulsation
frequency we can impose a lower limit of 1 Gyr on the age of the system,
and constrain the parameters of the oscillation mode. We show that with
further analysis of the spectra (extracting the atmospheric parameters),
tighter constraints could be imposed on the age, metallicity and the
mode parameters. This work emphasizes the power that a single pulsation
frequency can have for constraining stellar parameters in an eclipsing
binary system.
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