Ultraviolet Imaging Telescope images - Limits on recent star formation in Holmberg IX

Details Ultraviolet Imaging Telescope images - Limits on recent star formation in Holmberg IX Ultraviolet Imaging Telescope images - Limits on recent star formation in Holmberg IX

Jan 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...402l..45h&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 402, no. 2, p. L45-L48.

Astronomy and Astrophysics

Astronomy

14

Dwarf Galaxies, Irregular Galaxies, Star Formation, Ultraviolet Astronomy, Color-Magnitude Diagram, Stellar Evolution, Ultraviolet Telescopes

Scientific paper

Ultraviolet Imaging Telescope near-UV and far-UV images of Holmberg IX show no OB associations. Relative fluxes measured for the galaxy as a whole in the UV and optical B and V bands are consistent with models in which about 0.6-0.7 of the V flux is from an old population of age 10 Gyr, while the remainder is from stars of age 20-200 Myr, which also contribute 0.80 of the near-UV flux and 0.99 of the far-UV flux. Individual stars measured in B and V appear to be evolved stars of mass about 12 solar masses and age about 20 Myr belonging to the youngest population in the galaxy.

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