Detection of CA II absorption triplet in a circumnuclear H II region of NGC 3310

Details Detection of CA II absorption triplet in a circumnuclear H II region of NGC 3310 Detection of CA II absorption triplet in a circumnuclear H II region of NGC 3310

Jan 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990mnras.242p..48t&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 242, Jan. 15, 1990, p. 48P-51P. Research supported by t

Astronomy and Astrophysics

Astronomy

29

Absorption Spectra, Calcium, Fine Structure, H Ii Regions, Starburst Galaxies, Red Giant Stars, Spectrophotometry, Star Clusters, Supergiant Stars

Scientific paper

Long slit spectrophotometry has been obtained across NGC 3310, a luminous galaxy with circumnuclear bursts of star formation, covering the spectral range from 3650 to 9700 A. In one giant star-forming region, 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, to our knowledge, the first detection of the IR Ca II triplet in an extragalactic giant H II region and confirms theoretical predictions that, after some 4 Myr, red supergiants should appear in bursts of star formation.

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