AAS 198th Meeting, June 2001
Session 48. YSOs
Display, Tuesday, June 5, 2001, 10:00am-6:30pm, Exhibit Hall

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[48.05] A Detailed Picture of the YSO IRAS 22272+6358A

M. E. Ressler, D. M. Cole (JPL/Caltech)

IRAS 22272+6358A is a young stellar object (YSO) in the LDN 1206 dark cloud which is noteworthy for its appearance as a cold (< 50 K) yet luminous (~ 1100 L\odot) protostellar source. From earlier work, it is found to have near-infrared bipolar jets, a molecular outflow (of which only the blue wing has been observed), and a dense circumstellar envelope which renders the illuminating source invisible at wavelengths \lesssim 10 \mum. It also appears to drive a variety of masers, and so has been classified as a medium-to-high mass YSO, possibly of spectral type ~ B3; however, it may instead be a high mass analog of a Class 0 YSO with no well defined spectral type.

We present data from near-infrared through millimeter wavelengths to give the most detailed picture of this object to date. From NASA IRTF near- and mid-infrared imaging, we unambiguously establish the location of the illuminating source and the inclination of its jets; from KAO far-infrared and JCMT submillimeter mapping, we refine its spectral energy distribution and its luminosity; and from OVRO 2.7 mm continuum measurements, in addition to the mid-infrared imaging, we establish the size, orientation, and mass of its circumstellar envelope.

Support for this project has been provided by a JPL Lew Allen Award to M. Ressler and by a grant from the Supporting Research and Technology program of the NASA Office of Space Science.

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