X-ray properties of UV-selected star forming galaxies at z~1 in the Hubble Deep Field North

Abstract

We present an analysis of the X-ray emission from a large sample of ultraviolet (UV) selected, star forming galaxies with 0.74<z<1.32 in the Hubble Deep Field North (HDF-N) region. By excluding all sources with significant detected X-ray emission in the 2 Ms Chandra observation we are able to examine the properties of galaxies for which the emission in both UV and X-ray is expected to be predominantly due to star formation. Stacking the X-ray flux from 216 galaxies in the soft and hard bands produces significant detections. The derived mean 2-10 keV rest-frame luminosity is 2.97+/-0.26x10^(40) erg/s, corresponding to an X-ray derived star formation rate (SFR) of 6.0+/-0.6 Msolar/yr. Comparing the X-ray value with the mean UV derived SFR, uncorrected for attenuation, we find that the average UV attenuation correction factor is \~3. By binning the galaxy sample according to UV magnitude and colour, correlations between UV and X-ray emission are also examined. We find a strong positive correlation between X-ray emission and rest-frame UV emission. A correlation between the ratio of X-ray-to-UV emission and UV colour is also seen, such that L(X)/L(UV) increases for redder galaxies. Given that X-ray emission offers a view of star formation regions that is relatively unaffected by extinction, results such as these can be used to evaluate the effects of dust on the UV emission from high-z galaxies. For instance we derive a relationship for estimating UV attenuation corrections as a function of colour excess. The observed relation is inconsistent with the Calzetti et al. (2000) reddening law which over predicts the range in UV attenuation corrections by a factor of ~100 for the UV selected z~1 galaxies in this sample (abridged).

10 pages, 7 figures, accepted for publication in MNRAS

References in corpus (2)

• A deep Chandra observation of the Groth Strip. I. The X-ray data
• X-ray Properties of Lyman Break Galaxies in the Great Observatories Origins Deep Survey

Cited by in corpus (37)

• Cosmic Star Formation History
• UV Continuum Slope and Dust Obscuration from z~6 to z~2: The Star Formation Rate Density at High Redshift
• Star Formation in NGC5194 (M51a): The Panchromatic View from GALEX to Spitzer
• Star Formation and Extinction in Redshift z~2 Galaxies: Inferences from Spitzer MIPS Observations
• Enhanced star formation rates in AGN hosts with respect to inactive galaxies from PEP-Herschel observations
• A Census of Optical and Near-Infrared Selected Star-Forming and Passively Evolving Galaxies at Redshift Z~2
• An Accounting of the Dust-Obscured Star Formation and Accretion Histories Over the Last ~11~Billion Years
• UV dust attenuation in normal star forming galaxies: I. Estimating the L_TIR/L_FUV ratio
• Extended Hot Halos Around Isolated Galaxies Observed in the ROSAT All-Sky Survey
• Characterizing Foreground for redshifted 21-cm radiation: 150 MHz GMRT observations
• The X-ray Star Formation Story as Told by Lyman Break Galaxies in the 4 Ms CDF-S
• The role of AGN in the colour transformation of galaxies at redshifts z~1
• Tracing the Mass-Dependent Star Formation History of Late-Type Galaxies using X-ray Emission: Results from the Chandra Deep Fields
• The X-ray Properties of Early-Type Galaxies in the Extended Chandra Deep Field-South
• On the X-ray properties of submm-selected galaxies
• A Comparison of X-ray and Mid-Infrared Selection of Obscured AGN
• The X-ray emission of Lyman break galaxies
• Discovery of Lyman Break Galaxies at z~7 from the ZFOURGE Survey
• X-ray flux in the SED modelling: An application of X-CIGALE in the XMM-XXL field
• Can nebular HeII emission be explained by ultra-luminous X-ray sources?
• X-ray selected starbursts in the GOODS-North
• Host galaxy colour gradients and accretion disc obscuration in AEGIS z~1 X-ray-selected active galactic nuclei
• X-ray properties of BzK-selected galaxies in the deepest X-ray fields
• The Nature of Blue Early-Type Galaxies in the Goods Fields
• The X-ray luminosity function of AGN at z~3
• The central energy source of 70micron-selected galaxies: Starburst or AGN?
• Polarization of 21cm Radiation from the Epoch of Reionization
• Tangled magnetic fields and CMBR signal from reionization epoch
• Evolution of the X-ray Luminosity in Young HII Galaxies
• GAMA/H-ATLAS: Common star-formation rate indicators and their dependence on galaxy physical parameters
• Multiwavelength Study of X-ray Selected Star Forming Galaxies within the Chandra Deep Field South
• Mining for normal galaxies in the First XMM-Newton Serendipitous Source Catalog
• X-ray properties of the z ~ 4.5 Lyman-alpha Emitters in the Chandra Deep Field South Region
• The Star Formation and Nuclear Accretion Histories of Normal Galaxies in the AGES Survey
• The contribution of X-ray binaries to the evolution of late-type galaxies: Evolutionary population synthesis simulations
• Dynamics of Lyman Break Galaxies and Their Host Halos
• Is a Classical Language Adequate in Assessing the Detectability of the Redshifted 21cm Signal from the Early Universe?