Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985pasp...97..838s&link_type=abstract
Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 97, Sept. 1985, p. 838-840. NSF-supported research.
Astronomy and Astrophysics
Astronomy
2
Hot Stars, Peculiar Stars, Stellar Spectra, White Dwarf Stars, Absorption Spectra, Astronomical Photometry, Balmer Series, H Lines, Signal To Noise Ratios, Stellar Color, Stellar Magnitude
Scientific paper
Two unusual, faint hot stars were discovered during a search for QSOs on CFHT slitless-spectral plates. The stars are designated by their approximate positions as 1631.4 + 3770 (blue mag = 18.8) and 2113.7 + 0590 (blue mag = 17.6). MMT observations show that the stars have energy distributions consistent with their being very hot. Both stars show strong Balmer absorption lines (H-beta through H-epsilon) and HeI (4471, 4388 A) with HeII (4686 A) probably absent and HeI (4388 A) remarkably weak or absent. The hydrogen lines have shallow cores and extended wings. H-beta and H-gamma profile fits to models with both high and low gravity suggest that both objects have logg greater than 5. The object 2113.7 + 0590 appears to have the higher gravity of the two, with H-gamma and HeI (9471 A) having nearly the same equivalent width (of about 5 A). Whether these objects are subdwarfs or white dwarfs, they are peculiar. Further spectroscopic observations with higher resolution and photometric observations are encouraged in order to determine the nature of these peculiar objects.
Cowley Anne Pyne
Crampton David
Sion Edward M.
No associations
LandOfFree
A note on two peculiar, subluminous, hot stars 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 A note on two peculiar, subluminous, hot stars, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A note on two peculiar, subluminous, hot stars will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-802245