Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994apj...434..349w&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 434, no. 1, p. 349-362
Astronomy and Astrophysics
Astrophysics
47
Abundance, Binary Stars, Peculiar Stars, Stellar Atmospheres, Visible Spectrum, A Stars, B Stars, Echelle Gratings, Manganese, Mercury (Metal), Stellar Spectra
Scientific paper
The optical spectrum of the chemically peculiar HgMn type binary star chi Lupi has been analyzed to determine atmospheric parameters and elemental abundances. Echelle spectra were obtained with the 3.9 m Anglo-Australian telescope to exploit the extreme shape-lined nature of the spectrum. This study was undertaken in support of ultraviolet analyses currently underway that utilize echell spectra obtained with the Hubble Space Telescope. For the B9.5 V primary star we obtain Teff = 10650 K, log g = 3.9, and xi = 0 km/s, while for the A2 V secondary, Teff = 9200 K, log g = 4.0, and xi = 2 km/s. Most of the elemental abundances are typical of HgMn stars with similar Teff showing an overall iron-peak elemental abundance distribution that is basically solar in nature with enhancement of the light elements Si, P, and S, as well as all detected elements heavier than the iron group. Abundances for several elements have been determined for the first time in this star, including several of the rare-earths. The secondary star spectrum shows Am star characteristics. We also discuss the relative merits of the equivalent width and synthetic spectrum techniques in determining the elemental abundances, concluding that the synthetic spectrum technique is necessary for obtaining abundances with the utmost accuracy.
Adelman Saul J.
Robinson Richard D.
Wahlgren Glenn Michael
No associations
LandOfFree
An optical region elemental abundance analysis of the chemically peculiar HgMn star chi LUPI 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 An optical region elemental abundance analysis of the chemically peculiar HgMn star chi LUPI, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and An optical region elemental abundance analysis of the chemically peculiar HgMn star chi LUPI will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1070460