The W3 IRS5 Cluster: Radio Continuum and Water Maser Observations

Details The W3 IRS5 Cluster: Radio Continuum and Water Maser Observations The W3 IRS5 Cluster: Radio Continuum and Water Maser Observations

Dec 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993aas...183.4909c&link_type=abstract

American Astronomical Society, 183rd AAS Meeting, #49.09; Bulletin of the American Astronomical Society, Vol. 25, p.1368

Astronomy and Astrophysics

Astronomy

Scientific paper

High-sensitivity and angular resolution observations of the radio continuum toward W3 IRS 5, along with observations of strong water masers have been made with the VLA. At least seven distinct radio continuum sources have been discovered, which are most likely a cluster of B0.5 - B0 stars with ionized stellar winds. This is in contrast to previous interpretations of observational data, which suggested that IRS 5 is a single massive protostar with bolometric luminosity of 2times 10(5) L\sun. The spatial distribution of the water masers roughly follows that of the radio sources; and these masers show a gradient in radial velocity similar to that found in a larger-scale molecular outflow. We suggest that previously observed, multi-component absorption in CO infrared transitions traces outflows from the several stellar wind sources, rather than episodic outbursts from a single source.

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