A multiwavelength study of young massive star forming regions: II. The dust environment

Details A multiwavelength study of young massive star forming regions: II. The dust environment A multiwavelength study of young massive star forming regions: II. The dust environment

2007-06-14

arxiv.org/abs/0706.2171v1

Astrophys.J.666:309-320,2007

Astronomy and Astrophysics

Astrophysics

6 figures, accepted by ApJ

Scientific paper

10.1086/520103

We present observations of 1.2-mm dust continuum emission, made with the Swedish ESO Submillimeter Telescope, towards eighteen luminous IRAS point sources, all with colors typical of compact HII regions and associated with CS(2-1) emission, thought to be representative of young massive star forming regions. Emission was detected toward all the IRAS objects. We find that the 1.2-mm sources associated with them have distinct physical parameters, namely sizes of 0.4 pc, dust temperatures of 30 K, masses of 2x10^3 Msun, column densities of 3x10^23 cm^-2, and densities of 4x10^5 cm^-3. We refer to these dust structures as massive and dense cores. Most of the 1.2-mm sources show single-peaked structures, several of which exhibit a bright compact peak surrounded by a weaker extended envelope. The observed radial intensity profiles of sources with this type of morphology are well fitted with power-law intensity profiles with power-law indices in the range 1.0-1.7. This result indicates that massive and dense cores are centrally condensed, having radial density profiles with power-law indices in the range 1.5-2.2. We also find that the UC HII regions detected with ATCA towards the IRAS sources investigated here (Paper I) are usually projected at the peak position of the 1.2-mm dust continuum emission, suggesting that massive stars are formed at the center of the centrally condensed massive and dense cores.

Affiliated with

Also associated with

No associations

Rating

A multiwavelength study of young massive star forming regions: II. The dust environment 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 A multiwavelength study of young massive star forming regions: II. The dust environment, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A multiwavelength study of young massive star forming regions: II. The dust environment will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-331650