Terahertz ammonia absorption as a probe of infall in high-mass star forming clumps

Details Terahertz ammonia absorption as a probe of infall in high-mass star forming clumps Terahertz ammonia absorption as a probe of infall in high-mass star forming clumps

2012-03-15

arxiv.org/abs/1203.3406v1

Astronomy and Astrophysics

Astrophysics

Galaxy Astrophysics

Accepted for publication in A&A (SOFIA/GREAT special issue)

Scientific paper

Cloud contraction and infall are the fundamental processes of star formation. While "blue-skewed" line profiles observed in high- mass star forming regions are commonly taken as evidence of infall by an ever increasing number of studies, their interpretation offers many pitfalls. Detecting infall via redshifted absorption in front of continuum sources is a much more direct and reliable method but so far mostly restricted toward absorption in the centimeter toward strong HII regions. Here we present a novel approach by probing absorption of rotational ammonia transitions in front of the strong dust emission of massive star-forming regions. A carefully selected sample of three regions with different stages of evolution is selected to study infall through the evolution of massive star-forming clumps. Redshifted absorption is detected toward all three sources and infall rates between 3-10x10-3 Msol yr-1 are derived.

Affiliated with

Also associated with

No associations

Rating

Terahertz ammonia absorption as a probe of infall in high-mass star forming clumps 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 Terahertz ammonia absorption as a probe of infall in high-mass star forming clumps, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Terahertz ammonia absorption as a probe of infall in high-mass star forming clumps will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-31407