Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008ap.....51..209g&link_type=abstract
Astrophysics, Volume 51, Issue 2, pp.209-217
Astronomy and Astrophysics
Astrophysics
1
Surveys, Stars, Carbon, Spectra
Scientific paper
We present new observations of seven late-type stars previously discovered in the First Byurakan Survey (FBS). These observations prove that they belong to the family of carbon (C) stars. Seventy-nine similar FBS C stars were previously known. The seven objects under analysis were presented in the FBS lists as M or C star candidates. Among the seven objects, six objects are confirmed by low-resolution spectra of the Hamburg Quasar Objective-Prism Survey. We also present for five of them moderate-resolution spectra obtained at optical wavelengths with a spectrograph equipped with a CCD detector. Three objects can be classified as N-type C stars. One object is an early CH-type C star. Most likely, the star FBS 1339+117 belongs to the group of carbon dwarfs. We estimate distances of these seven new C stars either by using their red-band magnitudes, or by using their near-infrared 2MASS J-KS color and KS-band magnitudes.
Engels Dieter
Gigoyan Kamo S.
Gualandi Roberto
Hambaryan Valeri V.
Mauron Nicolas
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