Molecular gas and continuum emission in 3C48: Evidence for two merger nuclei?

Abstract

We present new interferometer observations of the CO(1-0) line and mm continuum emission from 3C48 - one of the nearest examples of a merger activating a quasar. Our new CO data show that most of the CO is not in a disk around the quasar 3C48, but rather in a second nucleus associated with the source 3C48A ~1" to the north-east, recently studied in the near-IR by Zuther et al. (2004). This main CO source has a strong velocity gradient (140km/s over about 1"). Our new data also show a second, weaker CO source at the QSO itself. At 1.2mm, the continuum emission is elongated in the direction of the radio jet and towards 3C48A. We model the 1.2mm continuum with three different sources in 3C48 - the 3C48 QSO, the 3C48 jet, and the second nucleus 3C48A. We suggest that the unusually bright and extended nature of the jet may be due to its interaction with the second merger nucleus 3C48A.

arXiv comment11 pages, 11 figures, accepted for publication in A&A

References in corpus (23)

• Rotating Nuclear Rings and Extreme Starbursts in Ultraluminous Galaxies
• The Molecular Interstellar Medium in Ultraluminous Infrared Galaxies
• The Luminosity Function of Young Star Clusters In "The Antennae" Galaxies (NGC 4038/4039)
• A hyperluminous galaxy at z = 2.8 found in a deep submillimetre survey
• Resolved Molecular Gas in a Quasar Host Galaxy at Redshift z=6.42
• Molecular Gas in the z=2.8 Submillimeter Galaxy SMM 02399-0136
• Spatially Resolved Millimeter Interferometry of SMMJ02399-0136: a Very Massive Galaxy at z=2.8
• Counterrotating Nuclear Disks in Arp 220
• CO(4-3) and dust emission in two powerful high-z radio galaxies, and CO lines at high redshifts
• NICMOS Imaging of the Nuclei of Arp 220
• High resolution imaging of molecular line emission from high redshift QSOs
• A Multi-Transistion CO Study of the "Antennae" Galaxies NGC4038/9
• The Host Galaxies of Optical Bright QSOs: Molecular Gas in Z < 0.1 PG-QSOs
• Detection of Two Massive CO Systems in 4C 41.17 at z = 3.8
• Molecular Gas and the Modest Star Formation Efficiency in the ``Antennae'' Galaxies: Arp~244=NGC 4038/39
• Molecular Gas and Nuclear Activity in Ultraluminous Infrared Galaxies with Double Nuclei
• 3C 48: Stellar Populations and the Kinematics of Stars and Gas in the Host Galaxy
• Dust emission from 3C radio galaxies and quasars: New ISO observations favour the unified scheme
• Detection of CO J=1-0 in the z=3.79 radio galaxy 4C60.07
• Multi-wavelength Observations of the Gas-rich Host Galaxy of PDS 456: a New Challenge for the ULIRG-to-QSO Transition Scenario
• A multi-particle model of the 3C 48 host
• The radio counter-jet of the QSO 3C~48
• NIR Observations of the QSO 3C 48 Host Galaxy

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• Molecular gas in type 2 quasars at z~0.2-0.3
• The molecular gas content of ULIRG type 2 quasars at z < 1
• The SCUBA-2 Web Survey: I. Observations of CO(3-2) in hyper-luminous QSO fields
• Merger driven ULIRG-QSO evolution: The case of 3C 48