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The kinematics and morphology of NGC 520: One, two, or three galaxiesThe peculiar galaxy NGC 520 (Arp 157) is often interpreted as an interacting pair of galaxies. The identification of the two bulges and overall morphology of the two galaxies has long been a puzzle which the authors attempt to solve here. New longslit optical spectroscopy and near-infrared images of NGC 520 are presented. These data suggest that the northwest peak is the bulge of one of two galaxies in the system. The other larger bulge is clearly evident in the K band image in the middle of the dust lane. The stellar radial velocity profile in the central 10 seconds of the larger bulge is consistent with counterrotation seen in the molecular gas component. This kinematic subsystem could be the remains of a merged gas-rich irregular.
Document ID
19910007595
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Stanford, S. A.
(Wisconsin Univ. Madison, WI, United States)
Balcells, M.
(Wisconsin Univ. Madison, WI, United States)
Date Acquired
September 6, 2013
Publication Date
November 1, 1990
Publication Information
Publication: NASA, Marshall Space Flight Center, Paired and Interacting Galaxies: International Astronomical Union Colloquium No. 124
Subject Category
Astrophysics
Accession Number
91N16908
Funding Number(s)
CONTRACT_GRANT: NAS7-918
CONTRACT_GRANT: NAS5-25451
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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