The young open cluster Trumpler 15 in the Eta Carinae complex

Details The young open cluster Trumpler 15 in the Eta Carinae complex The young open cluster Trumpler 15 in the Eta Carinae complex

Jun 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980aj.....85..708f&link_type=abstract

Astronomical Journal, vol. 85, June 1980, p. 708-715. Research supported by the Consejo Nacional de Investigaciones Cientificas

Astronomy and Astrophysics

Astronomy

28

Astronomical Photometry, Early Stars, Milky Way Galaxy, Nebulae, Open Clusters, Stellar Evolution, Ubv Spectra, Astronomical Maps, Cosmic Dust, Cosmic Gases, Electrophotometers, Giant Stars, Interstellar Extinction, Spectral Emission, Stellar Luminosity, Supergiant Stars, Variable Stars

Scientific paper

The compact open cluster Trumpler 15, which is located near the complex of young clusters in the vicinity of Eta Carinae which are associated with the extensive emission nebula NGC 3372, is investigated in order to determine its complex membership. Photoelectric UBVRI photometry and slit spectra reveal Tr 15 to be a young open cluster (age 6 plus or minus 3 million years) at a distance (2.6 kpc) and mean color excess (0.48) suggesting its membership in the Eta Carinae complex. Possible members of the cluster include the M supergiant RT Car, a highly reddened O 9.5 bright giant star and a highly reddened late B supergiant. It is pointed out that the membership of Tr 15 in the Eta Carinae complex makes that complex one of the largest known complexes containing very young clusters, stars, gas and dust, with a diameter on the order of 30 pc.

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