MNRAS 433, 2812–2839 (2013) doi:10.1093/mnras/stt905 Advance Access publication 2013 July 2
The ATLAS3D Project – XXIII. Angular momentum and nuclear surface brightness profiles
Davor Krajnovic,´ 1‹ A. M. Karick,2 Roger L. Davies,2 Thorsten Naab,3 Marc Sarzi,4 Eric Emsellem,5,6 Michele Cappellari,2 Paolo Serra,7 P. T. de Zeeuw,5,8 Nicholas Scott,9 Richard M. McDermid,10 Anne-Marie Weijmans,11† Timothy A. Davis,5 Katherine Alatalo,12,13 Leo Blitz,12 Maxime Bois,14 Martin Bureau,2 Frederic Bournaud,15 Alison Crocker,15 Pierre-Alain Duc,16 17,18 5 6,19 6,19 Sadegh Khochfar, Harald Kuntschner, Raffaella Morganti, Tom Oosterloo Downloaded from and Lisa M. Young20 1Leibniz-Institut fur¨ Astrophysik Potsdam (AIP), An der Sternwarte 16, D-14482 Potsdam, Germany 2Sub-department of Astrophysics, Department of Physics, University of Oxford, Denys Wilkinson Building, Keble Road, Oxford OX1 3RH, UK 3Max-Planck-Institut fur¨ Astrophysik, Karl-Schwarzschild-Str. 1, D-85741 Garching, Germany
4Centre for Astrophysics Research, University of Hertfordshire, Hatfield, Herts AL1 9AB, UK http://mnras.oxfordjournals.org/ 5European Southern Observatory, Karl-Schwarzschild-Str. 2, D-85748 Garching, Germany 6Observatoire de Lyon, Centre de Recherche Astrophysique de Lyon and Ecole Normale Superieure´ de Lyon, Universite´ Lyon 1, 9 avenue Charles Andre,´ F-69230 Saint-Genis Laval, France 7Netherlands Institute for Radio Astronomy (ASTRON), Postbus 2, 7990 AA Dwingeloo, the Netherlands 8Sterrewacht Leiden, Leiden University, Postbus 9513, NL-2300 RA Leiden, the Netherlands 9Centre for Astrophysics and Supercomputing, Swinburne University of Technology, Hawthorn, Victoria 3122, Australia 10Gemini Observatory, Northern Operations Centre, 670 N. A‘ohoku Place, Hilo, HI 96720, USA 11Dunlap Institute for Astronomy & Astrophysics, University of Toronto, 50 St George Street, Toronto, ON M5S 3H4, Canada 12Department of Astronomy, Campbell Hall, University of California, Berkeley, CA 94720, USA 13
Infrared Processing and Analysis Center, California Institute of Technology, Pasadena, CA 91125, USA at European Southern Observatory on October 28, 2015 14Observatoire de Paris, LERMA and CNRS, 61 Av. de l’Observatoire, F-75014 Paris, France 15Ritter Astrophysical Observatory, University of Toledo, Toledo, OH 43606, USA 16Laboratoire AIM Paris-Saclay, CEA/IRFU/SAp CNRS D Universite´ Paris Diderot, F-91191 Gif-sur-Yvette Cedex, France 17Max Planck Institut fur¨ extraterrestrische Physik, PO Box 1312, D-85478 Garching, Germany 18Institute for Astronomy, University of Edinburgh, Royal Observatory, Blackford Hill, Edinburgh EH9 3HJ, UK 19Kapteyn Astronomical Institute, University of Groningen, Postbus 800, NL-9700 AV Groningen, the Netherlands 20Department of Physics, New Mexico Institute of Mining and Technology, Socorro, NM 87801, USA
Accepted 2013 May 21. Received 2013 May 20; in original form 2013 February 15
ABSTRACT We investigate nuclear light profiles in 135 ATLAS3D galaxies for which the Hubble Space Telescope (HST) imaging is available and compare them to the large-scale kinematics obtained with the SAURON integral-field spectrograph. Specific angular momentum, λR, correlates with the shape of nuclear light profiles, where, as suggested by previous studies, cores are typically found in slow rotators and core-less galaxies are fast rotators. As also shown before, cores are found only in massive galaxies and only in systems with the stellar mass (measured via dynamical models) M 8 × 1010 M . Based on our sample, we, however, see no evidence for a bimodal distribution of nuclear slopes. The best predictor for finding a core is based on the stellar velocity dispersion within an effective radius, σ e, and specific angular momentum, −1 where cores are found for λR 0.25 and σ e 160 km s . We estimate that only about 10 per cent of nearby early-type galaxies contain cores. Furthermore, we show that there is a genuine population of fast rotators with cores. We also show that core fast rotators are
E-mail: [email protected] † Dunlop Fellow.