Kim, Taehyun and Sheth, Kartik and Hinz, Joannah L. and Lee, Myung Gyoon and Zaritsky, Dennis and Gadotti, Dimitri A. and Knapen, Johan H. and Schinnerer, Eva and Ho, Luis C. and Laurikainen, Eija and Salo, Heikki and Athanassoula, E. and Bosma, Albert and de Swardt, Bonita and Muñoz-Mateos, Juan-Carlos and Madore, Barry F. and Comerón, Sébastien and Regan, Michael W. and Menéndez-Delmestre, Karín and Gil de Paz, Armando and Seibert, Mark and Laine, Jarkko and Erroz-Ferrer, Santiago and Mizusawa, Trisha (2012) Early-type Galaxies with Tidal Debris and Their Scaling Relations in the Spitzer Survey of Stellar Structure in Galaxies (S^4G). Astrophysical Journal, 753 (1). Art. No. 43. ISSN 0004-637X http://resolver.caltech.edu/CaltechAUTHORS:20120723-105651001
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Tidal debris around galaxies can yield important clues on their evolution. We have identified tidal debris in 11 early-type galaxies (T ≤ 0) from a sample of 65 early types drawn from the Spitzer Survey of Stellar Structure in Galaxies (S4G). The tidal debris includes features such as shells, ripples, and tidal tails. A variety of techniques, including two-dimensional decomposition of galactic structures, were used to quantify the residual tidal features. The tidal debris contributes ~3%-10% to the total 3.6 μm luminosity of the host galaxy. Structural parameters of the galaxies were estimated using two-dimensional profile fitting. We investigate the locations of galaxies with tidal debris in the fundamental plane and Kormendy relation. We find that galaxies with tidal debris lie within the scatter of early-type galaxies without tidal features. Assuming that the tidal debris is indicative of recent gravitational interaction or merger, this suggests that these galaxies have either undergone minor merging events so that the overall structural properties of the galaxies are not significantly altered, or they have undergone a major merging events but already have experienced sufficient relaxation and phase mixing so that their structural properties become similar to those of the non-interacting early-type galaxies.
|Additional Information:||© 2012 The American Astronomical Society. Received 2012 January 13; accepted 2012 April 16; published 2012 June 13. T.K. is grateful to the entire S4G team for their efforts in this project. We thank Hyunsung David Jun for kindly sharing the data of the Jun & Im (2008) paper. We also thank Jesus Falcon-Barroso for providing us with updated data from Falcόn-Barroso et al. (2011). We are grateful to the anonymous referee for helpful comments and suggestions that have improved this paper. T.K., K.S., J.-C.M.-M., and T.M. acknowledge support from the National Radio Astronomy Observatory. The National Radio Astronomy Observatory is a facility of the National Science Foundation operated under cooperative agreement by Associated Universities, Inc. M.G.L. was supported in part by Mid-career Research Program through the NRF grant funded by the MEST (No. 2010-0013875). This work was co-funded under the Marie Curie Actions of the European Commission (FP7-COFUND). E.A. and A.B. thank the Centre National d’Etudes for support. This research is based on observations and archival data made with the Spitzer Space Telescope, and made use of the NASA/IPAC Extragalactic Database (NED) which are operated by the Jet Propulsion Laboratory, California Institute of Technology under a contract with National Aeronautics and Space Administration (NASA). We acknowledge the usage of the HyperLeda database (http://leda.univ-lyon1.fr). Facility: Spitzer|
|Subject Keywords:||galaxies: elliptical and lenticular, cD; galaxies: evolution; galaxies: fundamental parameters; galaxies: individual (NGC 474, NGC 680, NGC 1222, NGC 1482, NGC 2634, NGC 3032, NGC 4106, NGC 4694, NGC 5018, NGC 5574, NGC 5576); galaxies: interactions; galaxies: structure|
|Official Citation:||Early-type Galaxies with Tidal Debris and Their Scaling Relations in the Spitzer Survey of Stellar Structure in Galaxies (S4G) Taehyun Kim et al. 2012 ApJ 753 43|
|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Ruth Sustaita|
|Deposited On:||24 Jul 2012 21:26|
|Last Modified:||26 Dec 2012 15:40|
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