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Date and Time of the Query: 2019-08-17 T20:16:17 PDT
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For refcode 2005A&A...436..469C:
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NED Abstract

Copyright by European Southern Observatory (ESO). Reproduced by permission
2005A&A...436..469C A Virgo high-resolution H{alpha} kinematical survey I. NGC 4438 L. Chemin, V. Cayatte, C. Balkowski, P. Amram, C. Carignan, A. Boselli, C. Adami, M. Marcelin, O. Garrido, O. Hernandez and J. Boulesteix Received 15 July 2004 / Accepted 28 February 2005 New H{alpha} emission-line observations of the Virgo cluster galaxy NGC 4438 are presented. Fabry-Perot interferometry data at an effective angular resolution of ~2"arcsec are used to map the kinematics of the ionized gas in the galaxy. For the first time we obtain a velocity field covering a large area in NGC 4438, much larger than that deduced from previous HI and CO maps. The kinematics of the extended, low surface brightness H{alpha} filaments to the West of the galactic disk is discussed. We report on the discovery of a northern H{alpha} structure which is clumpier than the other filaments. Evidence for multiple spectral components through the data-cube are presented ina nuclear shell and in the approaching half of the disk. The role of VCC 1040, a dwarf elliptical galaxy located to the South of NGC 4438, is presented to investigate the origin of a small-scale stellar tail of NGC 4438. It could be due to a minor tidal interaction between the two galaxies. Keywords: galaxies: clusters: individual: NGC 4438, galaxies: interactions, galaxies: kinematics and dynamics
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