Observations of Star-Forming Regions with the Midcourse Space Experiment

Details Observations of Star-Forming Regions with the Midcourse Space Experiment Observations of Star-Forming Regions with the Midcourse Space Experiment

Sep 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003aj....126.1423k&link_type=abstract

The Astronomical Journal, Volume 126, Issue 3, pp. 1423-1450.

Astronomy and Astrophysics

Astronomy

25

Infrared Radiation, Ism: Clouds, Ism: Individual: Name: Rosette Nebula, Ism: Individual: Name: Orion Nebula, Ism: Individual: Alphanumeric: W3, Ism: Individual (Pleiades), Ism: Individual (G300.2-16.8), Ism: Individual (S263, G159.6-18.5), Stars: Formation

Scientific paper

We have imaged seven nearby star-forming regions, the Rosette Nebula, the Orion Nebula, W3, the Pleiades, G300.2-16.8, S263, and G159.6-18.5, with the Spatial Infrared Imaging Telescope on the Midcourse Space Experiment (MSX) satellite at 18" resolution at 8.3, 12.1, 14.7, and 21.3 μm. The large angular scale of the regions imaged (~7.2-50 deg2) makes these data unique in terms of the combination of size and resolution. In addition to the star-forming regions, two cirrus-free fields (MSXBG 160 and MSXBG 161) and a field near the south Galactic pole (MSXBG 239) were also imaged. Point sources have been extracted from each region, resulting in the identification over 500 new sources (i.e., no identified counterparts at other wavelengths), as well as over 1300 with prior identifications. The extended emission from the star-forming regions is described, and prominent structures are identified, particularly in W3 and Orion. The Rosette Nebula is discussed in detail. The bulk of the mid-infrared emission is consistent with that of photon-dominated regions, including the elephant trunk complex. The central clump, however, and a line of site toward the northern edge of the cavity show significantly redder colors than the rest of the Rosette complex.

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