Discovery of a Cold Extended Condensation in the Orion A Complex

Details Discovery of a Cold Extended Condensation in the Orion A Complex Discovery of a Cold Extended Condensation in the Orion A Complex

Mar 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998apj...496..267r&link_type=abstract

Astrophysical Journal v.496, p.267

Astronomy and Astrophysics

Astronomy

48

Balloons, Ism: H Ii Regions, Ism: Individual Name: Orion Nebula, Radio Continuum: Ism, Shock Waves

Scientific paper

The central region of the Orion A cloud complex has been observed in the submillimeter range, using the French balloon-borne 2 m telescope PRONAOS-SPM during its first flight, in 1994 September. An area covering 50' x 10' and including the M42 Nebula has been mapped in four submillimeter photometric bands: lambda 180-240, 240-340, 340-560, and 560-1050 mu m, with high sensitivity (<=2 MJy sr-1) and an angular resolution from 2' to 3.'5. Four brightness enhancements are visible and have been identified with the following sources: (1) the brightest peak corresponding to the central core of the nebula, in the BN/KL source direction; (2) an extended emission region around 5' x 8', to the southeast of BN/KL, correlated with 100 mu m IRAS and 13CO emission (this has been identified as a gas-density enhancement associated with a shock region); (3) the edge of an ionized part of the cloud, correlated with the 100 mu m emission; and (4) a very cold and extended condensation, discovered at 16' northwest of BN/KL. The emission spectra obtained for these sources show a variation of the dust emissivity spectral index within a large range, from 1 +/- 0.1 to 2.2 +/- 0.2. The cold condensation discovered (T = 12.5 +/- 3 K) has a very low brightness emission, undetected on the 100 mu m IRAS map. It extends over approximately 0.7 pc (FWHM), with a total mass of 11 M&sun; and a total luminosity of 2.4 L&sun;.

Affiliated with

Also associated with

No associations

Rating

Discovery of a Cold Extended Condensation in the Orion A Complex does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Discovery of a Cold Extended Condensation in the Orion A Complex, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Discovery of a Cold Extended Condensation in the Orion A Complex will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1657271