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Ultra-Luminous Infrared Mergers: Elliptical Galaxies in Formation?

ArXiv astro-ph/0106032 (2001)

Authors:

R Genzel, LJ Tacconi, D Rigopoulou, D Lutz, M Tecza

Abstract:

We report high quality near-infrared spectroscopy of 12 ultra-luminous infrared galaxy mergers (ULIRGs). Our new VLT and Keck data provide ~0.5" resolution, stellar and gas kinematics of these galaxies most of which are compact systems in the last merger stages. We confirm that ULIRG mergers are 'ellipticals-in-formation'. Random motions dominate their stellar dynamics, but significant rotation is common. Gas and stellar dynamics are decoupled in most systems. ULIRGs fall on or near the fundamental plane of hot stellar systems, and especially on its less evolution sensitive, r(eff)-sigma projection. The ULIRG velocity dispersion distribution, their location in the fundamental plane and their distribution of v(rot)*sin(i)/sigma closely resemble those of intermediate mass (~L*), elliptical galaxies with moderate rotation. As a group ULIRGs do not resemble giant ellipticals with large cores and little rotation. Our results are in good agreement with other recent studies indicating that disky ellipticals with compact cores or cusps can form through dissipative mergers of gas rich, disk galaxies while giant ellipticals with large cores have a different formation history.
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The 2dF Galaxy Redshift Survey: Luminosity dependence of galaxy clustering

(2001)

Authors:

P Norberg, CM Baugh, E Hawkins, S Maddox, JA Peacock, S Cole, CS Frenk, J Bland-Hawthorn, T Bridges, R Cannon, M Colless, C Collins, W Couch, G Dalton, SP Driver, G Efstathiou, RS Ellis, K Glazebrook, C Jackson, O Lahav, I Lewis, S Lumsden, BA Peterson, W Sutherland, K Taylor, the 2dFGRS Team
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The 2dF Galaxy Redshift Survey: The power spectrum and the matter content of the universe

(2001)

Authors:

Will J Percival, Carlton M Baugh, Joss Bland-Hawthorn, Terry Bridges, Russell Cannon, Shaun Cole, Matthew Colless, Chris Collins, Warrick Couch, Gavin Dalton, Roberto De Propris, Simon P Driver, George Efstathiou, Richard S Ellis, Carlos S Frenk, Karl Glazebrook, Carole Jackson, Ofer Lahav, Ian Lewis, Stuart Lumsden, Steve Maddox, Stephen Moody, Peder Norberg, John A Peacock, Bruce A Peterson, Will Sutherland, Keith Taylor
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Hubble Space Telescope-NICMOS Observations of M31’s Metal-Rich Globular Clusters and Their Surrounding Fields. I. Techniques**Based on observations with the NASA/ESA Hubble Space Telescope obtained at the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy (AURA), Inc., for NASA under contract NAS 5-26555.

The Astronomical Journal American Astronomical Society 121:5 (2001) 2584-2596

Authors:

Andrew W Stephens, Jay A Frogel, Wendy Freedman, Carme Gallart, Pascale Jablonka, Sergio Ortolani, Alvio Renzini, R Michael Rich, Roger Davies
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Hubble Space Telescope-NICMOS Observations of M31’s Metal-Rich Globular Clusters and Their Surrounding Fields. II. Results**Based on observations with the NASA/ESA Hubble Space Telescope obtained at the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy (AURA), Inc., for NASA under contract NAS 5-26555.

The Astronomical Journal American Astronomical Society 121:5 (2001) 2597-2609

Authors:

Andrew W Stephens, Jay A Frogel, Wendy Freedman, Carme Gallart, Pascale Jablonka, Sergio Ortolani, Alvio Renzini, R Michael Rich, Roger Davies
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