AEGIS: Infrared Spectral Energy Distributions of MIPS 70micron selected sources

Abstract

We present 0.5 -160 micron Spectral Energy Distributions (SEDs) of galaxies, detected at 70microns with the Multiband Imaging Photometer for Spitzer (MIPS), using broadband imaging data from Spitzer and ground-based telescopes. Spectroscopic redshifts, in the range 0.2<z<1.5, have been measured as part of the Deep Extragalactic Evolutionary Probe2 (DEEP2) project. Based on the SEDs we explore the nature and physical properties of the sources. Using the optical spectra we derive Hbeta and [OII]-based Star Formation Rates (SFR) which are 10-100 times lower than SFR estimates based on IR and radio. The median offset in SFR between optical and IR is reduced by a factor of ~3 when we apply a typical extinction corrections. We investigate mid-to-far infrared correlations for low redshift (>0.5) and high redshift (0.5<z<1.2) bins. Using this unique ``far-infrared'' selected sample we derive an empirical mid to far-infrared relationship that can be used to estimate the infrared energy budget of galaxies in the high-redshift universe. Our sample can be used as a template to translate far-infrared luminosities into bolometric luminosities for high redshift objects.

arXiv comment4 pages, 5 figures, accepted for publication in AEGIS ApJL Special Issue

References in corpus (14)

• The Spitzer Space Telescope Mission
• The Infrared Spectral Energy Distribution of Normal Star-Forming Galaxies: Calibration at Far-Infrared and Submillimeter Wavelengths
• The All-wavelength Extended Groth Strip International Survey (AEGIS) Data Sets
• The Far- and Mid-Infrared/Radio Correlations in the Spitzer Extragalactic First Look Survey
• Number Counts At 3 < lambda < 10 um From the Spitzer Space Telescope
• Infrared Spectral Energy Distributions of Nearby Galaxies
• Far infrared and Radio emission in dusty starburst galaxies
• The AGN contribution to mid-infrared surveys
• Spitzer 70 and 160-micron Observations of the Extragalactic First Look Survey
• The AGN Contribution to the Mid-IR Emission of Luminous Infrared Galaxies
• AEGIS20: a radio survey of the Extended Groth Strip
• IRAC Imaging of Lockman Hole
• Infrared spectroscopy of faint 15 micron sources in the Hubble Deep Field South: first hints at the properties of the sources of the IR background
• VLT-ISAAC near-IR Spectroscopy of ISO selected Hubble Deep Field South Galaxies

Cited by in corpus (10)

• The All-wavelength Extended Groth Strip International Survey (AEGIS) Data Sets
• Herschel-ATLAS: Rapid evolution of dust in galaxies in the last 5 billion years
• Exploring the evolutionary paths of the most massive galaxies since z~2
• The Link Between SCUBA and Spitzer: Cold Galaxies at z<1
• The properties of 70micron selected high-redshift galaxies in the Extended Groth Strip
• Host galaxy colour gradients and accretion disc obscuration in AEGIS z~1 X-ray-selected active galactic nuclei
• The central energy source of 70micron-selected galaxies: Starburst or AGN?
• The Comoving Infrared Luminosity Density: Domination of Cold Galaxies across 0<z<1
• Spectroscopic follow-up of 70μm sources in Spitzer Wide-area Infrared Extragalactic Legacy Survey
• A High-resolution Far-infrared Survey to Probe Black Hole-Galaxy Co-evolution