Spectroscopy of variable blue stellar objects

Details Spectroscopy of variable blue stellar objects Spectroscopy of variable blue stellar objects

Jun 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983apj...269...73u&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 269, June 1, 1983, p. 73-80.

Statistics

17

Quasars, Stellar Spectrophotometry, Ubv Spectra, Variable Stars, Distribution Functions, Luminosity, Red Shift, Signal To Noise Ratios, Stellar Color, Ultraviolet Spectra

Scientific paper

It is pointed out that optical variability has been detected in a significant number of the class of optically selected quasars. The present investigation is concerned with the results of a study of the optical variability of objects selected for their ultraviolet excess (UVX) from three fields in the north galactic polar cap and centered on Karteyn Selected Areas 57, 29, and 28. The study of the luminosity fluctuations of quasars and variable stars leads in theory to a better understanding of their astrophysical nature. But it is necessary first to discover them. Attention is given to the establishment of a list of candidate variables discovered among the UVX objects in the three fields, their spectroscopic identifications, and related statistics.

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