Astron. Astrophys. 358, 1022-1026 (2000)

A carbon rich star BD +75^o 348: a binary?

L. Zas ¹, M.R. Schmidt ² and W.J. Schuster <sup>3

1</sup> Ventspils International Radio Astronomy Center, Akadmijas laukums 1, 1050 Riga, Latvia
² N. Copernicus Astronomical Center, ul. Rabiaska 8, 87-100 Toru, Poland
³ Observatorio Astronomico Nacional, UNAM, Apartado Postal 877, C.P. 22800 Ensenada, B.C., Mexico

Received 16 February 2000 / Accepted 22 April 2000

Abstract

An LTE abundance analysis of the "CH-like" star BD  348, with an unknown evolutionary status, is presented based on high resolution, high signal-to-noise spectra. With [C/Fe] = +0.5 dex and a mean s-process overabundance of [s/Fe] dex the peculiar atmospheric composition of BD  348 is confirmed. The modest iron deficiency, [Fe/H] = -0.8, and the kinematic data support the idea that BD  348 is an old disk population object. Possible evolutionary stages, that can explain its atmospheric parameters and peculiar chemical composition, are discussed.

Key words: stars: evolution stars: abundances stars: chemically peculiar stars: individual: O  348

Send offprint requests to: L. Zas (zacs@latnet.lv)

SIMBAD Objects

Contents

• 1. Introduction
• 2. Observations and reduction
• 3. Analysis
  • 3.1. Radial and space velocities
  • 3.2. Atmospheric parameters
  • 3.3. The abundance analysis
• 4. Discussion and conclusions
• Acknowledgements
• References

© European Southern Observatory (ESO) 2000

Online publication: June 20, 2000
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