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:0706.0003)
· References in the article
· Citations to the Article (19) (Citation History)
· Refereed Citations to the Article
· SIMBAD Objects (2)
· Also-Read Articles (Reads History)
·
· Translate This Page
Title:
Infrared Spectral Energy Distributions of z ~ 0.7 Star-forming Galaxies
Authors:
Zheng, Xian Zhong; Dole, Hervé; Bell, Eric F.; Le Floc'h, Emeric; Rieke, George H.; Rix, Hans-Walter; Schiminovich, David
Affiliation:
AA(Max-Planck Institut für Astronomie, D-69117 Heidelberg, Germany.; Purple Mountain Observatory, 210008 Nanjing, China; .), AB(Institut d'Astrophysique Spatiale (IAS), bat 121, F-91405 Orsay; and Université Paris-Sud 11 and CNRS (UMR 8617), France.), AC(Max-Planck Institut für Astronomie, D-69117 Heidelberg, Germany.), AD(Spitzer Fellow, Institute for Astronomy, University of Hawaii, Honolulu, HI 96822.), AE(Steward Observatory, University of Arizona, Tucson, AZ 85721.), AF(Max-Planck Institut für Astronomie, D-69117 Heidelberg, Germany.), AG(Department of Astronomy, Columbia University, New York, NY 10027.)
Publication:
The Astrophysical Journal, Volume 670, Issue 1, pp. 301-312. (ApJ Homepage)
Publication Date:
11/2007
Origin:
UCP
ApJ Keywords:
Galaxies: Evolution, Galaxies: Starburst, Infrared: Galaxies
DOI:
10.1086/520529
Bibliographic Code:
2007ApJ...670..301Z

Abstract

We analyze the infrared (IR) spectral energy distributions (SEDs) for 10 μm<λrest<100 μm for ~600 galaxies at z~0.7 in the extended Chandra Deep Field South by stacking their Spitzer 24, 70, and 160 μm images. We place interesting constraints on the average IR SED shape in two bins: the brightest 25% of z~0.7 galaxies detected at 24 μm, and the remaining 75% of individually detected galaxies. Galaxies without individual detections at 24 μm were not well detected at 70 and 160 μm even through stacking. We find that the average IR SEDs of z~0.7 star-forming galaxies fall within the diversity of z~0 templates. While dust obscuration LIR/LUV seems to be only a function of star formation rate (SFR; ~LIR+LUV), not of redshift, the dust temperature of star-forming galaxies (with SFR~10 Msolar yr-1 ) at a given IR luminosity was lower at z~0.7 than today. We suggest an interpretation of this phenomenology in terms of dust geometry: intensely star-forming galaxies at z~0 are typically interacting, and host dense centrally concentrated bursts of star formation and warm dust temperatures. At z~0.7, the bulk of intensely star-forming galaxies are relatively undisturbed spirals and irregulars, and we postulate that they have large amounts of widespread lower density star formation, yielding lower dust temperatures for a given IR luminosity. We recommend which IR SEDs are most suitable for modeling intermediate-redshift galaxies with different SFRs.
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