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A galaxy at a redshift of 3.215 - Further studies of the PKS 1614+051 system

Djorgovski, S. and Strauss, Michael A. and Perley, R. A. and Spinrad, Hyron and McCarthy, Patrick (1987) A galaxy at a redshift of 3.215 - Further studies of the PKS 1614+051 system. Astronomical Journal, 93 (6). pp. 1318-1325. ISSN 0004-6256. doi:10.1086/114414.

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A narrow-emission-line companion of the quasar PKS 1614 + 051 was reported earlier as a probable galaxy at a redshift of 3.218, which would have made it by far the most distant galaxy known at the time. We report here on new radio and optical imaging, and optical and near-IR spectroscopy of the PKS 1614 + 051 system. We argue that the data support and reinforce the original interpretation of the companion object as a mildly active galaxy, possibly a marginal Seyfert.2. The object has a detectable and marginally resolved optical continuum, but was not detected at radio .wavelengths. The ionization state is low, and the emission lines are fairly narrow. The improved redshift for the companion, based on the Lyα line alone, is 3.215 ± 0.002. New Lyα images show interesting morphology of extended emission-line gas, suggestive of a possible tidal interaction with the neighboring QSO. Two other, fainter objects in the immediate proximity of the QSO may also be associated with the system. If this is the case, we may be seeing a group of galaxies in the early stages of formation.

Item Type:Article
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Djorgovski, S.0000-0002-0603-3087
Strauss, Michael A.0000-0002-0106-7755
Additional Information:© 1987 American Astronomical Society. Provided by the NASA Astrophysics Data System. Received 9 December 1986; revised 22 January 1987. Based in part on observations obtained at, the Multiple Mirror Telescope Observatory, a joint facility of the Smithsonian Institution and the University of Arizona. We are very thankful to the staffs of the Kitt Peak, VLA, and MMT Observatories for their help in obtaining the data used in this work. We also thank Susan Tokarz for her help in reducing the MMT spectra. The radio data were obtained with the Very Large Array, NRAO, which is operated by the Associated Universities, Inc., under a contract with the NSF. We thank L. Cowie and E. Hu for stimulating conversations and communications of their results before publication. The paper benefited from a constructive refereeing by A. Stockton. S. D. acknowledges partial support from Harvard University. H. S. was supported in part by NSF grant AST85-13416. M. A. S. acknowledges the support of an NSF Graduate Fellowship.
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Harvard UniversityUNSPECIFIED
NSFAST 85-13416
NSF Graduate Research FellowshipUNSPECIFIED
Issue or Number:6
Record Number:CaltechAUTHORS:20190801-161709869
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:97614
Deposited By: Tony Diaz
Deposited On:02 Aug 2019 14:43
Last Modified:16 Nov 2021 17:33

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