ARA OB1 - A stellar association formed by the action of an energetic event?

Details ARA OB1 - A stellar association formed by the action of an energetic event? ARA OB1 - A stellar association formed by the action of an energetic event?

Mar 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987a%26a...174...78a&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 174, no. 1-2, March 1987, p. 78-84. Research supported by Columbia University.

Astronomy and Astrophysics

Astrophysics

14

B Stars, Interstellar Matter, O Stars, Star Clusters, Star Formation, Brightness Temperature, Bubbles, Carbon Monoxide, Centimeter Waves, Hydrogen, Molecular Clouds

Scientific paper

Neutral hydrogen (at λ = 21 cm) and carbon monoxide (at λ = 2.6 mm) line observations of the interstellar medium in the neighbourhood of the association Ara OB1 are reported. The observed H I distribution indicates the presence of an expanding structure. The total H I mass associated with such feature amounts to 4800 solar masses, and its momentum and kinetic energy are ≡4×104M_sun; km s-1 and 3×1048erg, respectively. The H I structure, 42 pc in diameter, expands at a speed of 10 km s-1. A possible origin for the expanding H I structure, and a genetic link between such structure and Ara OB1 are proposed.

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