The Properties and Redshift Evolution of Intermediate-Luminosity Off-Nuclear X-ray Sources in the Chandra Deep Fields

Abstract

We analyze a population of intermediate-redshift (z ~ 0.05-0.3), off-nuclear X-ray sources located within optically-bright galaxies in the Great Observatories Origins Deep Survey (GOODS) and Galaxy Evolution from Morphology and SEDs (GEMS) fields. A total of 24 off-nuclear source candidates are classified using deep Chandra exposures from the Chandra Deep Field-North, Chandra Deep Field-South, and Extended Chandra Deep Field-South; 15 of these are newly identified. These sources have average X-ray spectral shapes and optical environments similar to those observed for off-nuclear intermediate-luminosity (L_X >~ 10^{39} erg/s in the 0.5-2.0 keV band) X-ray objects (IXOs; sometimes referred to as ultraluminous X-ray sources [ULXs]) in the local universe. This sample improves the available source statistics for intermediate-redshift, off-nuclear sources with L_X >~ 10^{39.5} erg/s, and it places significant new constraints on the redshift evolution of the off-nuclear source frequency in field galaxies. The fraction of intermediate-redshift field galaxies containing an off-nuclear source with L_X >~ 10^{39} erg/s is suggestively elevated (~80% confidence level) with respect to that observed for IXOs in the local universe; we calculate this elevation to be a factor of 1.9^{+1.4}_{-1.3}. A rise in this fraction is plausibly expected as a consequence of the observed increase in global star-formation density with redshift, and our results are consistent with the expected magnitude of the rise in this fraction.

Accepted for publication in AJ. 37 pages, 12 figures

References in corpus (37)

• First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Determination of Cosmological Parameters
• Star Formation in Galaxies Along the Hubble Sequence
• The Great Observatories Origins Deep Survey: Initial Results From Optical and Near-Infrared Imaging
• The Star Formation History of Field Galaxies
• The Chandra Deep Field-North Survey. XIII. 2 Ms Point-Source Catalogs
• Ultraluminous X-Ray Sources in External Galaxies
• The Chandra Deep Field South: the 1 Million Second
• The Chandra Deep Field South: Optical Spectroscopy I
• A Wavelet-Based Algorithm for the Spatial Analysis of Poisson Data
• Spitzer view on the evolution of star-forming galaxies from z=0 to z~3
• Deep Extragalactic X-ray Surveys
• GEMS: Galaxy Evolution from Morphologies and SEDs
• A catalogue of the Chandra Deep Field South with multi-colour classification and photometric redshifts from COMBO-17
• The Size Evolution of High Redshift Galaxies
• The Ultra-Luminous X-ray Source Population from the Chandra Archive of Galaxies
• Optical and Infrared Properties of the 2 Ms Chandra Deep Field-North X-ray Sources
• A Deep, Wide Field, Optical, and Near Infrared Catalog of a Large Area around the Hubble Deep Field North
• The GALEX-VVDS Measurement of the Evolution of the Far-Ultraviolet Luminosity Density and the Cosmic Star Formation Rate
• The Team Keck Treasury Redshift Survey of the GOODS-North Field
• The Fall of AGN and the Rise of Star-Forming Galaxies: A Close Look at the Chandra Deep Field X-ray Number Counts
• The Extended Chandra Deep Field-South Survey. Chandra Point-Source Catalogs
• Old and Young X-ray Point Source Populations in Nearby Galaxies
• A Catalog of Candidate Intermediate-luminosity X-ray Objects
• A Comparison of Intermediate Mass Black Hole Candidate ULXs and Stellar-Mass Black Holes
• Ultra-luminous X-ray Sources in nearby galaxies from ROSAT HRI observations I. data analysis
• Photometric Redshifts for Galaxies in the GOODS Southern Field
• A deep Chandra observation of the Groth Strip. I. The X-ray data
• A Mini-survey of X-ray Point Sources in Starburst and Non-Starburst Galaxies
• The Lack of Very Ultraluminous X-ray Sources in Early-type Galaxies
• An Optical Study of Stellar and Interstellar Environments of Seven Luminous and Ultraluminous X-Ray Sources
• X-Ray Probes of Cosmic Star-Formation History
• X-ray Properties of Lyman Break Galaxies in the Great Observatories Origins Deep Survey
• The Chandra Deep Field North Survey. VIII. X-ray Constraints on Spiral Galaxies from 0.4 < z < 1.5
• The Statistical Properties of Galaxies Containing ULXs
• HMXB, ULX and star formation
• Lower Mass Black Holes in the GOODS? Off-nuclear X-ray Sources
• Peering Through the Muck: Notes on the Influence of the Galactic Interstellar Medium on Extragalactic Observations

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