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Ara OB1 - A stellar association formed by the action of an energetic event?Neutral hydrogen (at the wavelength of 21 cm) and carbon monoxide (at 2.6 mm) line observations of the interstellar medium in the neighborhood 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 about 40,000 solar mass km/s and 3 x 10 to the 48th erg, respectively. The H I structure, 42 pc in diameter, expands at a speed of 10 km/s. A possible origin for the expanding H I structure, and a genetic link between such structure and Ara OB1 are proposed.
Document ID
19870049686
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Arnal, E. M.
(Instituto Argentino de Radioastronomia Villa Elisa; Observatorio Astronomico, La Plata, Argentina)
Cersosimo, J. C.
(Instituto Argentino de Radioastronomia Villa Elisa, Argentina)
May, J.
(Universidad de Chile Santiago, United States)
Bronfman, L.
(NASA Goddard Institute for Space Studies; Columbia University New York; Universidad de Chile, Santiago, United States)
Date Acquired
August 13, 2013
Publication Date
March 1, 1987
Publication Information
Publication: Astronomy and Astrophysics
Volume: 174
Issue: 1-2,
ISSN: 0004-6361
Subject Category
Astrophysics
Accession Number
87A36960
Distribution Limits
Public
Copyright
Other

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