An upper limit on the H I content of the Carina dwarf spheroidal galaxy

Details An upper limit on the H I content of the Carina dwarf spheroidal galaxy An upper limit on the H I content of the Carina dwarf spheroidal galaxy

Oct 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...362l..55m&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 362, Oct. 20, 1990, p. L55-L57.

Astronomy and Astrophysics

Astrophysics

30

Dwarf Galaxies, Elliptical Galaxies, Hydrogen, Interstellar Gas, Stellar Winds, Centimeter Waves, Neutral Gases, Wind Velocity

Scientific paper

Neutral hydrogen 21 cm measurements of the Carina dwarf spheroidal galaxy yield an upper limit on its H I content of about 1000 solar masses. For (M/L) about 30, this translates into an upper limit of 0.0001 on its fractional H I content. It is possible that Carina has efficiently cleansed itself of gas because red giant wind velocities are of the order of the escape velocity. It is then interesting to ask how Carina retained its gas for the first few billion of its existence.

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