The sun among the stars. I - A search for solar spectral analogs

Details The sun among the stars. I - A search for solar spectral analogs The sun among the stars. I - A search for solar spectral analogs

Feb 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978a%26a....63..383h&link_type=abstract

Astronomy and Astrophysics, vol. 63, no. 3, Feb. 1978, p. 383-390.

Astronomy and Astrophysics

Astronomy

108

Abundance, Astronomical Catalogs, G Stars, Solar Spectra, Stellar Spectrophotometry, Ultraviolet Astronomy, Absorption Spectra, Albedo, Metals, Planetary Radiation, Stellar Temperature

Scientific paper

A total of 77 solar-type stars in parts of the northern and southern skies have been photoelectrically scanned with 20-A resolution to find stars whose ultraviolet spectra (3640-4100 A) match that of the sun. Down to a V magnitude of 6.6 there seem to be only two: HR 7504 in the Northern and HR 2290 in the Southern Hemisphere. No G2V star matches the sun; they all have weaker ultraviolet absorptions, most of them much weaker. Stars that do match have B-V of 0.66 magnitude. The search shows that G-type dwarfs are hotter than was thought before by many researchers, which has important consequences for metal abundances derived with respect to the sun.

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