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Title:
Spatially Resolved Millimeter Interferometry of SMM J02399-0136: AVery Massive Galaxy at z = 2.8
Authors:
Genzel, Reinhard; Baker, Andrew J.; Tacconi, Linda J.; Lutz, Dieter; Cox, Pierre; Guilloteau, Stéphane; Omont, Alain
Affiliation:
AA(Max-Planck-Institut für extraterrestrische Physik, Postfach 1312, D-85741 Garching, Germany.; Department of Physics, 366 Le Conte Hall, University of California, Berkeley, CA 94720-7300.), AB(Max-Planck-Institut für extraterrestrische Physik, Postfach 1312, D-85741 Garching, Germany.), AC(Max-Planck-Institut für extraterrestrische Physik, Postfach 1312, D-85741 Garching, Germany.), AD(Max-Planck-Institut für extraterrestrische Physik, Postfach 1312, D-85741 Garching, Germany.), AE(Institut d'Astrophysique Spatiale, Université de Paris XI, F-91405 Orsay, France.), AF(Institut de Radio Astronomie Millimétrique, 300 rue de la Piscine, F-38406 Saint Martin d'Hères, France.; European Southern Observatory, Karl-Schwarzschild-Strasse 2, D-85741 Garching, Germany.), AG(Institut d'Astrophysique de Paris, CNRS, 98bis boulevard Arago, F-75014 Paris, France.)
Publication:
The Astrophysical Journal, Volume 584, Issue 2, pp. 633-642. (ApJ Homepage)
Publication Date:
02/2003
Origin:
UCP
ApJ Keywords:
Galaxies: Active, Galaxies: Formation, Galaxies: High-Redshift, Galaxies: ISM, Galaxies: Kinematics and Dynamics, Galaxies: Starburst
DOI:
10.1086/345718
Bibliographic Code:
2003ApJ...584..633G

Abstract

We report high-resolution millimeter mapping with the IRAM Plateau de Bure interferometer of rest-frame 335 μm continuum and CO (3-2) line emission from the z=2.8 submillimeter galaxy SMM J02399-0136. The continuum emission comes from a ~3" diameter structure whose elongation is approximately east-west and whose centroid is coincident within the astrometric errors with the brightest X-ray and rest-UV peak (L1). The line data show that this structure is most likely a rapidly rotating disk. Its rotation velocity of >=420 km s-1 implies a total dynamical mass of >=3×1011sin-2ih-10.7 Msolar within an intrinsic radius of 8h-10.7 kpc, most of which is plausibly in the form of stars and gas. SMM J02399-0136 is thus a very massive system, whose formation at z~3 is not easy to understand in current cold dark matter hierarchical merger cosmogonies.

Based on observations obtained at the IRAM Plateau de Bure interferometer. IRAM is funded by the INSU/CNRS (France), the MPG (Germany), and the IGN (Spain).

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