Sub-Arcsecond Structure in IRAS20126+4104

Details Sub-Arcsecond Structure in IRAS20126+4104 Sub-Arcsecond Structure in IRAS20126+4104

Dec 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001aas...199.7601h&link_type=abstract

American Astronomical Society, 199th AAS Meeting, #76.01; Bulletin of the American Astronomical Society, Vol. 33, p.1419

Astronomy and Astrophysics

Astronomy

Scientific paper

IRAS20126+4104 is a rare example of a massive stellar object in a very early stage of the formation process. With a bolometric luminosity corresponding to a ZAMS spectral type of about B0, the absence of strong radio continuum emission indicates that IRAS20126+4104 is likely in an evolutionary stage prior to that of ultracompact HII regions. Further observational evidence for a very early stage in the star formation process in IRAS20126+4104 is a bipolar jet/outflow centered on a dense gas clump oriented perpendicular to the flow. To further investigate the distribution of matter very near this very young massive system we have obtained deep sub-arcsecond resolution observations of IRAS20126+4104 at wavelengths of 3.6cm, 1.3cm and 7mm with the VLA. Here we report on results from these observations which adress source multiplicity and limits on the presence of an accretion disk in IRAS20126+4104. This project was partially supported by NSF grant EPS 98-74782.

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