Volume 427, Number 3, December I 2004
|Page(s)||937 - 944|
|Section||Stellar structure and evolution|
|Published online||16 November 2004|
Fundamental parameters and evolutionary state of the Herbig Ae star candidate HD 35929
Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, 53121 Bonn, Germany e-mail: email@example.com
2 Ritter Observatory, Dept. of Physics & Astronomy, The University of Toledo, Toledo, OH 43606–3390, USA
3 Pulkovo Observatory, Saint-Petersburg, 196140, Russia
4 Dept. of Physics and Astronomy, Appalachian State University, Boone, NC 28608, USA
5 Special Astrophysical Observatory of the Russian Academy of Sciences, Karachai-Cirkassian Republic, Nizhnij Arkhyz, 369167, Russia
6 Isaac Newton Institute of Chile, SAO Branch, Russia
7 Fesenkov Astrophysical Institute, Almaty 480068, Kazakhstan
Accepted: 27 July 2004
HD 35929 is a pre-main-sequence Herbig Ae star candidate that exhibits emission in the Hα line and a weak IR excess. Although its luminosity type was estimated as iv from low-resolution spectroscopy, the insignificant HIPPARCOS parallax ( mas) contradicted the low luminosity. To resolve this discrepancy, we took 3 high-resolution optical spectra of the star (region 5200–6915 Å, ) and used an archival one (4000–6800 Å, ). Our analysis of the spectral and photometric information shows that HD 35929 is an F2 iii star with K, , , km s-1, , a mild metal deficit , and a weak interstellar reddening ( mag) at a distance pc. These results confirm an earlier suggestion by Marconi et al. ([CITE]) that HD 35929 is located within the instability strip. At the same time, we argue that it is not a young object, but rather a post-main-sequence giant. The fundamental parameters and IR excess of HD 35929 are similar to those of HD 19993, an emission-line late A-type giant recently discovered by us (Miroshnichenko et al. [CITE]). These objects might represent a group of evolved intermediate-mass stars with an enhanced mass loss.
Key words: techniques: spectroscopic / techniques: photometric / stars: circumstellar matter / stars: individual: HD 35929
© ESO, 2004
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