Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011basi...39..277s&link_type=abstract
Bulletin of the Astromical Society of India, Vol. 39, p. 277-287 (2011)
Astronomy and Astrophysics
Astronomy
Stars: Variables, Binaries: Eclipsing, Stars: Individual: U Her
Scientific paper
Using new spectroscopic data, we re-investigate the B-type eclipsing binary u Her. The method of spectrum disentangling is used to decompose the spectrum of the system to its individual spectra. Comparison of the decomposed spectra with the theoretical spectra is done to obtain the main fundamental parameters for both components. We analyzed a total of 0 new electronic spectra obtained through 1994-2004 of the spectroscopic binary star u Her. The radial velocity variations of the binary components are analyzed. The orbital solution suggests a circular orbit with a period of 2.051d and semi amplitude of 101±1 km s-1. Comparison against the synthetic grid gives Teff=19000±1000K, log g=3.5±0.25 with v sin i =145±5 km s-1 for the primary and Teff=11000±250K, log g=3.5±0.25 with v sin i =105±5 km s-1 for the secondary.
Nouh Mohamed
Saad Somaya
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