Sign on

SAO/NASA ADS Astronomy Abstract Service


· Find Similar Abstracts (with default settings below)
· Electronic Refereed Journal Article (HTML)
· Full Refereed Journal Article (PDF/Postscript)
· arXiv e-print (arXiv:0902.0121)
· References in the article
· Citations to the Article (8) (Citation History)
· Refereed Citations to the Article
· SIMBAD Objects (47)
· Also-Read Articles (Reads History)
·
· Translate This Page
Title:
Luminous Infrared Galaxies with the Submillimeter Array. II. Comparing the CO (3-2) Sizes and Luminosities of Local and High-Redshift Luminous Infrared Galaxies
Authors:
Iono, Daisuke; Wilson, Christine D.; Yun, Min S.; Baker, Andrew J.; Petitpas, Glen R.; Peck, Alison B.; Krips, Melanie; Cox, T. J.; Matsushita, Satoki; Mihos, J. Christopher; Pihlstrom, Ylva
Affiliation:
AA(Institute of Astronomy, The University of Tokyo, 2-21-1 Osawa, Mitaka, Tokyo 181-0015, Japan ; Nobeyama Radio Observatory, NAOJ, Minamimaki, Minamisaku, Nagano, 384-1305, Japan ; ), AB(Department of Physics and Astronomy, McMaster University, Hamilton, ON L8S 4M1, Canada ), AC(Department of Astronomy, University of Massachusetts, Amherst, MA 01003, USA ), AD(Department of Physics and Astronomy, Rutgers, the State University of New Jersey, 136 Frelinghuysen Road, Piscataway, NJ 08854-8019, USA ), AE(Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138, USA ), AF(Joint ALMA Office, Avda El Golf 40, piso 18, Santiago 7550108 Chile ), AG(Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138, USA ), AH(Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138, USA ), AI(Academia Sinica Institute of Astronomy and Astrophysics, Taipei 106, Taiwan ), AJ(Department of Astronomy, Case Western Reserve University, 10900 Euclid Avenue, Cleveland, OH 44106, USA ), AK(Department of Physics and Astronomy, University of New Mexico, Albuquerque, NM 87131, USA)
Publication:
The Astrophysical Journal, Volume 695, Issue 2, pp. 1537-1549 (2009). (ApJ Homepage)
Publication Date:
04/2009
Origin:
IOP
ApJ Keywords:
cosmology: observations, galaxies: formation, galaxies: high-redshift, galaxies: starburst, submillimeter
DOI:
10.1088/0004-637X/695/2/1537
Bibliographic Code:
2009ApJ...695.1537I

Abstract

We present a detailed comparison of the CO (3-2) emitting molecular gas between a local sample of luminous infrared galaxies (U/LIRGs) and a high-redshift sample that comprises submm selected galaxies (SMGs), quasars, and Lyman Break Galaxies (LBGs). The U/LIRG sample consists of our recent CO (3-2) survey using the Submillimeter Array while the CO (3-2) data for the high-redshift population are obtained from the literature. We find that the L^{^{\prime }}_CO(3-2) and L FIR relation is correlated over five orders of magnitude, which suggests that the molecular gas traced in CO (3-2) emission is a robust tracer of dusty star formation activity. The near unity slope of 0.93 ± 0.03 obtained from a fit to this relation suggests that the star formation efficiency is constant to within a factor of 2 across different types of galaxies residing in vastly different epochs. The CO (3-2) size measurements suggest that the molecular gas disks in local U/LIRGs (0.3-3.1 kpc) are much more compact than the SMGs (3-16 kpc), and that the size scales of SMGs are comparable to the nuclear separation (5-40 kpc) of the widely separated nuclei of U/LIRGs in our sample. We argue from these results that the SMGs studied here are predominantly intermediate stage mergers, and that the wider line widths arise from the violent merger of two massive gas-rich galaxies taking place deep in a massive halo potential.
Bibtex entry for this abstract   Preferred format for this abstract (see Preferences)

   

Find Similar Abstracts:

Use: Authors
Title
Keywords (in text query field)
Abstract Text
Return: Query Results Return    items starting with number
Query Form
Database: Astronomy
Physics
arXiv e-prints