The first direct detection of red supergiants in a giant H II region.

Details The first direct detection of red supergiants in a giant H II region. The first direct detection of red supergiants in a giant H II region.

Nov 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990rmxaa..21..192t&link_type=abstract

Revista Mexicana de Astronomia y Astrofisica, Vol. 21, p. 192 - 196

Astronomy and Astrophysics

Astronomy

1

H Ii Regions: Red Supergiants, H Ii Regions: Spectra

Scientific paper

The authors have obtained long slit spectrophotometry across NGC 3310, a luminous galaxy with circumnuclear bursts of star formation, covering the spectral range from λ 3650 to 9700 Å. In one of its giant star forming regions, the near IR Ca II absorption lines (a signature of young supergiants) was detected with a strength similar to that of the nuclear region. This is the first detection of the IR Ca II triplet in an extragalactic giant H II region and confirms theoretical predictions that, after some 4 million years, red supergiants should appear in bursts of star formation.

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