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Title: CO (2-1) LINE EMISSION IN REDSHIFT 6 QUASAR HOST GALAXIES

Abstract

We report new observations of CO (2-1) line emission toward five z {approx} 6 quasars using the Ka-band receiver system on the Expanded Very Large Array (EVLA). Strong detections were obtained in two of them, SDSS J092721.82+200123.7 and CFHQS J142952.17+544717.6, and a marginal detection was obtained in another source, SDSS J084035.09+562419.9. Upper limits of the CO (2-1) line emission have been obtained for the other two objects. The CO (2-1) line detection in J0927+2001 together with previous measurements of the CO (6-5) and (5-4) lines reveal important constraints on the CO excitation in the central {approx}10 kpc region of the quasar host galaxy. The CO (2-1) line emission from J1429+5447 is resolved into two distinct peaks separated by 1.''2 ({approx}6.9 kpc), indicating a possible gas-rich, major merging system, and the optical quasar position is consistent with the west peak. This result is in good agreement with the picture in which intense host galaxy star formation is coeval with rapid supermassive black hole (SMBH) accretion in the most distant universe. The two EVLA detections are ideal targets for further high-resolution imaging (e.g., with ALMA or EVLA observations) to study the gas distribution, dynamics, and SMBH-bulge-mass relation in these earliest quasar hostmore » galaxy systems.« less

Authors:
; ;  [1];  [2];  [3];  [4];  [5]; ;  [6];  [7];  [8];  [9];  [10];  [11];  [12]
  1. National Radio Astronomy Observatory, P.O. Box 0, Socorro, NM 87801 (United States)
  2. Max-Planck-Institute for Astronomy, Koenigsstuhl 17, 69117 Heidelberg (Germany)
  3. California Institute of Technology, 1200 E. California Blvd., Pasadena, CA 91125 (United States)
  4. Herzberg Institute of Astrophysics, National Research Council, 5071 West Saanich Rd., Victoria, BC V9E 2E7 (Canada)
  5. Argelander-Institut fuer Astronomie, University of Bonn, Auf dem Huegel 71, 53121 Bonn (Germany)
  6. Institut d'Astrophysique de Paris, CNRS and Universite Pierre et Marie Curie, Paris (France)
  7. Institut d'Astrophysique Spatiale, Universite Paris-Sud, F-91405 Orsay Cedex (France)
  8. Institute de Radioastronomie Millimetrique, St. Martin d'Heres, F-38406 (France)
  9. Department of Astrophysical Sciences, Princeton University, Princeton, NJ 08544 (United States)
  10. Laboratoire d'Astrophysique, Observatoire de Grenoble, Universite J. Fourier, BP 53, F-38041 Grenoble, Cedex 9 (France)
  11. Max-Planck-Institut fuer Radioastronomie, Auf dem Huegel 69, 53121 Bonn (Germany)
  12. Steward Observatory, University of Arizona, 933 N Cherry Ave., Tucson, AZ 85721 (United States)
Publication Date:
OSTI Identifier:
21565469
Resource Type:
Journal Article
Journal Name:
Astrophysical Journal Letters
Additional Journal Information:
Journal Volume: 739; Journal Issue: 1; Other Information: DOI: 10.1088/2041-8205/739/1/L34; Journal ID: ISSN 2041-8205
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; CARBON MONOXIDE; EMISSION; GALAXIES; QUASARS; RED SHIFT; STAR EVOLUTION; CARBON COMPOUNDS; CARBON OXIDES; CHALCOGENIDES; COSMIC RADIO SOURCES; EVOLUTION; OXIDES; OXYGEN COMPOUNDS

Citation Formats

Wang Ran, Wagg, Jeff, Carilli, Chris L., Walter, Fabian, Riechers, Dominick A., Willott, Chris, Bertoldi, Frank, Omont, Alain, Bergeron, Jacqueline, Beelen, Alexandre, Cox, Pierre, Strauss, Michael A., Forveille, Thierry, Menten, Karl M., and Fan, Xiaohui. CO (2-1) LINE EMISSION IN REDSHIFT 6 QUASAR HOST GALAXIES. United States: N. p., 2011. Web. doi:10.1088/2041-8205/739/1/L34.
Wang Ran, Wagg, Jeff, Carilli, Chris L., Walter, Fabian, Riechers, Dominick A., Willott, Chris, Bertoldi, Frank, Omont, Alain, Bergeron, Jacqueline, Beelen, Alexandre, Cox, Pierre, Strauss, Michael A., Forveille, Thierry, Menten, Karl M., & Fan, Xiaohui. CO (2-1) LINE EMISSION IN REDSHIFT 6 QUASAR HOST GALAXIES. United States. doi:10.1088/2041-8205/739/1/L34.
Wang Ran, Wagg, Jeff, Carilli, Chris L., Walter, Fabian, Riechers, Dominick A., Willott, Chris, Bertoldi, Frank, Omont, Alain, Bergeron, Jacqueline, Beelen, Alexandre, Cox, Pierre, Strauss, Michael A., Forveille, Thierry, Menten, Karl M., and Fan, Xiaohui. Tue . "CO (2-1) LINE EMISSION IN REDSHIFT 6 QUASAR HOST GALAXIES". United States. doi:10.1088/2041-8205/739/1/L34.
@article{osti_21565469,
title = {CO (2-1) LINE EMISSION IN REDSHIFT 6 QUASAR HOST GALAXIES},
author = {Wang Ran and Wagg, Jeff and Carilli, Chris L. and Walter, Fabian and Riechers, Dominick A. and Willott, Chris and Bertoldi, Frank and Omont, Alain and Bergeron, Jacqueline and Beelen, Alexandre and Cox, Pierre and Strauss, Michael A. and Forveille, Thierry and Menten, Karl M. and Fan, Xiaohui},
abstractNote = {We report new observations of CO (2-1) line emission toward five z {approx} 6 quasars using the Ka-band receiver system on the Expanded Very Large Array (EVLA). Strong detections were obtained in two of them, SDSS J092721.82+200123.7 and CFHQS J142952.17+544717.6, and a marginal detection was obtained in another source, SDSS J084035.09+562419.9. Upper limits of the CO (2-1) line emission have been obtained for the other two objects. The CO (2-1) line detection in J0927+2001 together with previous measurements of the CO (6-5) and (5-4) lines reveal important constraints on the CO excitation in the central {approx}10 kpc region of the quasar host galaxy. The CO (2-1) line emission from J1429+5447 is resolved into two distinct peaks separated by 1.''2 ({approx}6.9 kpc), indicating a possible gas-rich, major merging system, and the optical quasar position is consistent with the west peak. This result is in good agreement with the picture in which intense host galaxy star formation is coeval with rapid supermassive black hole (SMBH) accretion in the most distant universe. The two EVLA detections are ideal targets for further high-resolution imaging (e.g., with ALMA or EVLA observations) to study the gas distribution, dynamics, and SMBH-bulge-mass relation in these earliest quasar host galaxy systems.},
doi = {10.1088/2041-8205/739/1/L34},
journal = {Astrophysical Journal Letters},
issn = {2041-8205},
number = 1,
volume = 739,
place = {United States},
year = {2011},
month = {9}
}