Reconstructing Deconstruction: High-Velocity Cloud Distance through Disruption Morphology
Abstract
We present Arecibo L-band Feed Array 21 cm observations of a subcomplex of HVCs at the tip of the anticenter complex. These observations show morphological details that point to interaction with the ambient halo medium and differential drag within the cloud subcomplex. We develop a new technique for measuring cloud distances, which relies on these observed morphological and kinematic characteristics, and show that it is consistent with Hα distances. These results are consistent with distances to HVCs and halo densities derived from models in which HVCs are formed from cooling halo gas.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- February 2007
- DOI:
- 10.1086/510189
- arXiv:
- arXiv:astro-ph/0610429
- Bibcode:
- 2007ApJ...656..907P
- Keywords:
-
- Galaxy: Halo;
- ISM: Clouds;
- ISM: Kinematics and Dynamics;
- Radio Lines: ISM;
- Astrophysics
- E-Print:
- 8 pages, 2 figures, 1 tabe, Accepted to ApJ