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Title:
Reconstructing Deconstruction: High-Velocity Cloud Distance through Disruption Morphology
Authors:
Peek, J. E. G.; Putman, M. E.; McKee, Christopher F.; Heiles, Carl; Stanimirović, Snežana
Affiliation:
AA(Department of Astronomy, University of California, Berkeley, CA.), AB(Department of Astronomy, University of Michigan, Ann Arbor, MI.), AC(Departments of Physics and Astronomy, University of California, Berkeley, CA.), AD(Department of Astronomy, University of California, Berkeley, CA.), AE(Department of Astronomy, University of Wisconsin, Madison, WI.)
Publication:
The Astrophysical Journal, Volume 656, Issue 2, pp. 907-913. (ApJ Homepage)
Publication Date:
02/2007
Origin:
UCP
ApJ Keywords:
Galaxy: Halo, ISM: Clouds, ISM: Kinematics and Dynamics, Radio Lines: ISM
DOI:
10.1086/510189
Bibliographic Code:
2007ApJ...656..907P

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.
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