Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996aj....112.2291g&link_type=abstract
Astronomical Journal v.112, p.2291
Astronomy and Astrophysics
Astronomy
18
Stars: Fundamental Parameters, Stars: Horizontal-Branch
Scientific paper
The fundamental parameters (Teff, log(g), and [M/H]) for a set of 56 field horizontal-branch candidates have been determined using Strömgren uvby photometry, classification-dispersion CCD spectra and spectral synthesis. In the Teff, log(g) plane, the majority of these stars lie near to the model zero-age horizontal branches of Sweigart (1987) and thus are probable field horizontal-branch stars. Four are normal high-gravity dwarfs which may be field counterparts of cluster blue stragglers and one may belong to the class of "UV-bright" stars. One new, probable, RR Lyrae star has been identified. We discuss two FHB stars which cannot be modeled with normal helium-abundance atmospheres. We suggest that these two stars, which have Balmer lines too broad for their Balmer jumps, may be helium-rich horizontal-branch stars. Finally, we discuss the problems of the discrimination of FHB stars from "normal" evolved A-type stars, and the nature of the FHB "λ-Bootis-like" stars discovered in Paper I of this series.
Corbally Christopher J.
Davis Philip A. G.
Gray Richard O.
No associations
LandOfFree
The Fundamental Parameters of Field Horizontal-Branch Stars does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The Fundamental Parameters of Field Horizontal-Branch Stars, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Fundamental Parameters of Field Horizontal-Branch Stars will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1146251