Query : 2009A&A...501..429L

2009A&A...501..429L - Astronomy and Astrophysics, volume 501, 429-435 (2009/7-2)

On the nature of IC3328, an early-type dwarf galaxy with weak spiral structure.


Abstract (from CDS):

Various early-type dwarf galaxies with disk features have been identified in the Virgo cluster, including objects that display weak grand-design spiral arms despite being devoid of gas. Are these still related to the classical dEs, or are they a continuation of ordinary spiral galaxies? Kinematical information of acceptable quality is available for one of these galaxies, IC3328. We investigated its dynamical configuration, taking the effect of asymmetric drift into account, and using the Toomre parameter, as well as density wave considerations. The derived mass-to-light ratios and rotational velocities indicate a significant dynamically hot component in addition to the disk. However, any unambiguous conclusions will need to await further data for this and other early-type dwarfs with spiral structure.

Abstract Copyright:

Journal keyword(s): galaxies: dwarf - galaxies: elliptical and lenticular, cD - galaxies: fundamental parameters - galaxies: kinematics and dynamics - galaxies: spiral - galaxies: structure

Simbad objects: 3

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Number of rows : 3
N Identifier Otype ICRS (J2000)
ICRS (J2000)
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
1 IC 3328 GiP 12 25 57.9238048368 +10 03 13.552350912   14.9       ~ 153 0
2 NAME Virgo Cluster ClG 12 26 32.1 +12 43 24           ~ 6383 0
3 IC 3435 GiC 12 30 39.792 +15 07 47.29   15.7       ~ 31 0

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