SIMBAD references

2000ApJS..130..437D - Astrophys. J., Suppl. Ser., 130, 437-461 (2000/October-0)

Mid-infrared imaging of star-forming regions containing methanol masers.


Abstract (from CDS):

We present a mid-infrared imaging survey of 21 sites of massive star formation associated with methanol masers. Images were obtained from the Cerro Tololo Inter-American Observatory 4 m Blanco telescope using the University of Florida imager/spectrometer OSCIR. Of the 10 sites where the methanol masers are distributed in a linear fashion, we find three sources that are elongated at the same position angle as their linear methanol maser distributions. It is believed that these elongated mid-infrared objects are indeed circumstellar disks. It was found that the masers may arise inside the mid-infrared emitting regions of these young stellar objects, indicating that the methanol masers may be pumped by mid-infrared photons. Many mid-infrared sources in our survey have no detectable radio continuum emission, and we advance the hypothesis that these sources are lower mass, nonionizing stars.

Abstract Copyright:

Journal keyword(s): Stars: Circumstellar Matter - Infrared: Stars - Masers - Stars: Formation - Stars: Pre-Main-Sequence

Nomenclature: Table 2, Figs: DPT00 N, DPT00 GLLL.lll+B.bbb N, N=33.

Simbad objects: 21

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