N2H+(1-0) survey of massive molecular cloud cores

Details N2H+(1-0) survey of massive molecular cloud cores N2H+(1-0) survey of massive molecular cloud cores

2003-04-25

arxiv.org/abs/astro-ph/0304469v1

Astron.Astrophys. 405 (2003) 639-654

Astronomy and Astrophysics

Astrophysics

17 pages, Latex

Scientific paper

10.1051/0004-6361:20030659

We present the results of N2H+(1-0) observations of 35 dense molecular cloud cores from the northern and southern hemispheres where massive stars and star clusters are formed. Line emission has been detected in 33 sources, for 28 sources detailed maps have been obtained. The optical depth of (23-12) component toward peak intensity positions of 10 sources is ~ 0.2-1. In total, 47 clumps have been revealed in 26 sources. Integrated intensity maps with aspect ratios < 2 have been fitted with a power-law radial distribution $r^{-p}$ convolved with the telescope beam. Mean power-law index is close to unity corresponding to the $\sim r^{-2}$ density profile provided N2H+ excitation conditions do not vary inside these regions. Line widths of the cores either decrease or stay constant with distance from the center. The ratio of rotational to gravitational energy is too low for rotation to play a significant role in the dynamics of the cores. A correlation between mean line widths and sizes of clumps has been found.

Affiliated with

Also associated with

No associations

Rating

N2H+(1-0) survey of massive molecular cloud cores 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 N2H+(1-0) survey of massive molecular cloud cores, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and N2H+(1-0) survey of massive molecular cloud cores will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-266269