NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-03-21 T02:40:47 PDT
Help | Comment | NED Home

For refcode 2015ApJS..216....9C:
Retrieve 14 NED objects in this reference.
Please click here for ADS abstract

NED Abstract

Copyright by American Astronomical Society. Reproduced by permission
2015ApJS..216....9C Integral-field Stellar and Ionized Gas Kinematics of Peculiar Virgo Cluster Spiral Galaxies Cortes, Juan R.; Kenney, Jeffrey D. P.; Hardy, Eduardo Abstract. We present the stellar and ionized gas kinematics of 13 bright peculiar Virgo cluster galaxies observed with the DensePak Integral Field Unit at the WIYN 3.5 m telescope in order to look for kinematic evidence that these galaxies have experienced gravitational interactions or gas stripping. Two-dimensional maps of the stellar velocity V, stellar velocity dispersion sigma, and the ionized gas velocity (Hbeta and/or [O III]) are presented for the galaxies in the sample. The stellar rotation curves and velocity dispersion profiles are determined for 13 galaxies, and the ionized gas rotation curves are determined for 6 galaxies. Misalignments between the optical and kinematical major axes are found in several galaxies. While in some cases this is due to a bar, in other cases it seems to be associated with gravitational interaction or ongoing ram pressure stripping. Non-circular gas motions are found in nine galaxies, with various causes including bars, nuclear outflows, or gravitational disturbances. Several galaxies have signatures of kinematically distinct stellar components, which are likely signatures of accretion or mergers. For all of our galaxies, we compute the angular momentum parameter lambda_ R_. An evaluation of the galaxies in the lambda_ R_ ellipticity plane shows that all but two of the galaxies have significant support from random stellar motions, and have likely experienced gravitational interactions. This includes some galaxies with very small bulges and truncated/compact Halpha morphologies, indicating that such galaxies cannot be fully explained by simple ram pressure stripping, but must have had significant gravitational encounters. Most of the sample galaxies show evidence for ICM-ISM stripping as well as gravitational interactions, indicating that the evolution of a significant fraction of cluster galaxies is likely strongly impacted by both effects. Key words: galaxies: evolution, galaxies: interactions, galaxies: ISM, galaxies: kinematics and dynamics, galaxies: nuclei, galaxies: peculiar
Retrieve 14 NED objects in this reference.
Please click here for ADS abstract

Back to NED Home