Astronomy and Astrophysics – Astrophysics
Scientific paper
Nov 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000eaa..booke5412d&link_type=abstract
"Encyclopedia of Astronomy and Astrophysics, Edited by Paul Murdin, article 5412. Bristol: Institute of Physics Publishing, 2001
Astronomy and Astrophysics
Astrophysics
Stars, Stellar Models And Concepts
Scientific paper
Subdwarfs of spectral type O (sdO stars) are hot evolved stars with a lower luminosity than main sequence O stars. The sdO stars cover a wide range in the HERTZSPRUNG-RUSSELL DIAGRAM (HRD, see figure 1). At lower luminosities and temperatures they form the extension of the subdwarfs of spectral type B (sdB), bounded by the extreme blue extension of the Horizontal Branch (EHB) and the helium mai...
Dreizler Stefan
Murdin Paul
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