SIMBAD references

2006A&A...453..493S - Astronomy and Astrophysics, volume 453, 493-506 (2006/7-2)

IC 4200: a gas-rich early-type galaxy formed via a major merger.

SERRA P., TRAGER S.C., VAN DER HULST J.M., OOSTERLOO T.A. and MORGANTI R.

Abstract (from CDS):

We present the result of radio and optical observations of the S0 galaxy IC 4200. We observed the galaxy at the 21 cm wavelength with the Australian Telescope Compact Array, and we obtained optical spectroscopy and V- and R-band images with ESO/NTT/EMMI. Our aim is to determine the link between HI and stellar content of IC 4200 and derive a coherent picture of its formation. We find that the galaxy hosts 8.5x109M of HI rotating on a ∼90deg warped disk extended out to 60 kpc from the centre of the galaxy. Optical spectroscopy reveals a simple-stellar-population-equivalent age of 1.5Gyr in the centre of the galaxy and V- and R-band images show stellar shells. Ionised gas is observed within the stellar body and is kinematically decoupled from the stars and characterised by LINER-like line ratios. We interpret these observational results as evidence for a major merger origin of IC 4200, and date the merger back to 1-3Gyr ago.

Abstract Copyright:

Journal keyword(s): galaxies: elliptical and lenticular, cD - galaxies: evolution - galaxies: interactions - galaxies: stellar content - galaxies: formation - galaxies: peculiar

VizieR on-line data: <Available at CDS (J/A+A/453/493): tablec1.dat tablec2.dat>

Simbad objects: 18

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