Two early-type post-AGB stars at high galactic latitudes

Autor:	E. S. Conlon, Francis P. Keenan, R. J. H. McCausland, Philip Dufton
Rok vydání:	1991
Předmět:	Physics Atmosphere Stars Photometry (astronomy) Space and Planetary Science Metallicity Stellar atmosphere Astronomy Astronomy and Astrophysics Astrophysics Spectroscopy Spectral line Latitude
Zdroj:	Monthly Notices of the Royal Astronomical Society. 248:820-826
ISSN:	1365-2966 0035-8711
DOI:	10.1093/mnras/248.4.820
Popis:	Two high galactic latitude B-type stars, PHL 1580 and PHL 174, originally identified as distant early-type objects from low-resolution spectroscopy and photometry are re-analysed using high-resolution spectra. The results of LTE and non-LTE model atmosphere analyses reveal general metal underabundances relative to solar values of typically 0.6 and 1.0 dex for PHL 1580 and PHL 174, respectively. For both stars carbon is significantly more underabundant. The anomalous compositions are compatible with those of other high galactic latitude post-AGB objects, while the derived atmospheric parameters are coincident with post-AGB evolutionary tracks.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::e068deceeee9054adf708a73454a8957 https://doi.org/10.1093/mnras/248.4.820 Zobrazit plný text záznamu