Some remarks on supergiant photospheres

Details Some remarks on supergiant photospheres Some remarks on supergiant photospheres

Jul 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975rspta.279..421d&link_type=abstract

(Royal Society, Discussion on Astronomy in the Ultraviolet, London, England, Apr. 9, 10, 1974.) Royal Society (London), Philosop

Astronomy and Astrophysics

Astronomy

Photosphere, Spaceborne Astronomy, Stellar Spectra, Supergiant Stars, Ultraviolet Spectra, Early Stars, Line Spectra, Near Ultraviolet Radiation, Satellite Observation, Stellar Atmospheres, Stellar Evolution, Td-1 Satellite

Scientific paper

Some characteristic aspects of near-ultraviolet spectra of supergiant stars, observed with the Utrecht ultraviolet stellar spectrometer aboard E.S.R.O.'s TD1A satellite are described. A comparison of the observed maximum brightness of supergiants with theoretical computation shows that in the brightest early-type supergiants, the outward driving forces due to radiation pressure and to the turbulent pressure gradient must be about equal.

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