Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980pasp...92..328f&link_type=abstract
Astronomical Society of the Pacific, Publications, vol. 92, June 1980, p. 328-332. Research supported by the Natural Sciences an
Astronomy and Astrophysics
Astronomy
1
Spectrum Analysis, Stars, Stellar Spectrophotometry, Ubv Spectra, Ultraviolet Astronomy, Ultraviolet Radiation, Classifications, Radial Velocity, Spectral Energy Distribution
Scientific paper
HD 219150, an F0 V star with a one-quarter magnitude excess in (U-B) as shown by UBVRI and four-color-H beta observations, is discussed. An attempt is made to explain this excess by examining metal deficiency in HD 219150 and by seeking an extremely hot subdwarf companion. Spectrograms at both classification and higher dispersions discounted the first possibility, while far ultraviolet data and radial-velocity measurements eliminated the second. Computation of the fluxes expected from free-bound Balmer emission and free-free emission from an optically thin gas also proved unsuccessful in explaining the ultraviolet data. Also considered was variability on a long time scale, but the star was found constant in light, including U, to better than 0.01 m over four months of observation.
Bolton Charles T.
Fernie Donald J.
No associations
LandOfFree
HD 219150 - A star with a remarkable ultraviolet excess 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 HD 219150 - A star with a remarkable ultraviolet excess, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and HD 219150 - A star with a remarkable ultraviolet excess will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1218038