A thin ring model for the OH megamaser in IIIZw35

Details A thin ring model for the OH megamaser in IIIZw35 A thin ring model for the OH megamaser in IIIZw35

2004-06-29

arxiv.org/abs/astro-ph/0406650v1

Astronomy and Astrophysics

Astrophysics

Scientific paper

10.1007/s10509-005-3734-6

We present a model for the OH megamaser emission in the starburst galaxy IIIZw35. The observed diffuse and compact OH maser components in this source are explained by a single phase of unsaturated clumpy gas distributed in a thin ring structure and amplifying background continuum. We emphasize the importance of clumpiness in the OH masing medium, an effect that has not been fully appreciated previously. The model explains why multiple bright spots are seen only at the ring tangents while smoother emission is found elsewhere. Both the observed velocity gradients and the line to continuum ratios around the ring enquire a geometry where most of the seed photons come from a continuum emission which lies outside the OH ring. To explain both the OH and continuum brightness, free-free absorbing gas is required along the ring axis to partially absorb the far side of the ring. It is proposed that the required geometry arises from an inwardly propagating ring of starburst activity.

Affiliated with

Also associated with

No associations

Rating

A thin ring model for the OH megamaser in IIIZw35 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 thin ring model for the OH megamaser in IIIZw35, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A thin ring model for the OH megamaser in IIIZw35 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-525359