Gas kinematics in the halo of the warm ULIRG PKS1345+12

We use long-slit spectra taken with the William Herschel Telescope on La Palma and high-resolution Hubble Space Telescope imaging to study the gas kinematic in the halo of the ultraluminous infrared/radio galaxy PKS1345+12 ( z =0.122). Our long-slit spectra show line splitting at the locations of ma...

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Bibliographic Details
Published in:Astrophysics and space science 2009-12, Vol.324 (2-4), p.225-229
Main Authors: Zaurín, Javier Rodríguez, Holt, Joanna, Tadhunter, Clive N., González Delgado, Rosa M.
Format: Article
Language:English
Subjects:
Astrobiology
Astronomy
Astrophysics
Astrophysics and Astroparticles
Cosmology
Observations and Techniques
Original Article
Physics
Physics and Astronomy
Space Exploration and Astronautics
Space Sciences (including Extraterrestrial Physics
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Summary:We use long-slit spectra taken with the William Herschel Telescope on La Palma and high-resolution Hubble Space Telescope imaging to study the gas kinematic in the halo of the ultraluminous infrared/radio galaxy PKS1345+12 ( z =0.122). Our long-slit spectra show line splitting at the locations of massive star clusters ( M ⊙ ), indicating that they are moving at up to 450 km s −1 with respect to the local ambient gas. Given their kinematics, it is plausible that these super star clusters have been formed either in fast-moving gas streams or tidal tails that are falling back into the nuclear regions as part of the merger process, or as a consequence of jet-induced star formation linked to the extended, diffuse radio emission detected in the halo of the galaxy.
ISSN:0004-640X
1572-946X
DOI:10.1007/s10509-009-0111-x