Possible Detection of Cosmological Reionization Sources

Abstract

We compare the available catalogs of $z\approx 6$ galaxies in the Hubble Ultra-Deep Field (UDF) and in the Great Observatories Origins Deep Survey (GOODS) with the expected properties of the sources of cosmological reionization from our previous theoretical study. Our approach is based on the mean surface brightness of the sources required for reionization and depends on relatively few undetermined parameters. We find that the observed mean surface brightness of galaxies at $z\approx 6$ is sufficient for reionization, provided that the sources are composed of hot metal-free or metal-poor stars, regardless of whether reionization occurs over a short or long interval of redshift. The broad agreement between the new observations and our predictions suggests that we may have detected the sources responsible for some or even all of the reionization of hydrogen.

arXiv commentApJL in press. Slightly revised version (mostly wording and some extra references). Original version submitted on 21-March-2004. 10 pages, 1 figure

References in corpus (28)

• First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Determination of Cosmological Parameters
• Stellar population synthesis at the resolution of 2003
• The Great Observatories Origins Deep Survey: Initial Results From Optical and Near-Infrared Imaging
• Lyman Break Galaxies at z>4 and the Evolution of the UV Luminosity Density at High Redshift
• The Formation of the First Stars. I. The Primordial Star Forming Cloud
• Evidence for Reionization at z ~ 6: Detection of a Gunn-Peterson Trough in a z=6.28 Quasar
• Radiative Transfer in a Clumpy Universe: III. The Nature of Cosmological Ionizing Sources
• The transition from Population III to normal galaxies: Ly-a and HeII 1640 emission and the ionising properties of high redshift starburst galaxies
• The Formation and Fragmentation of Primordial Molecular Clouds
• Evolution of the Ionizing Background and the Epoch of Reionization from the Spectra of z~6 Quasars
• Generic Spectrum and Ionization Efficiency of a Heavy Initial Mass Function for the First Stars
• The Reionization of the Universe by the First Stars and Quasars
• Cosmic Variance in the Great Observatories Origins Deep Survey
• Large Equivalent width Lyman-alpha line emission at z=4.5: young galaxies in a young universe
• The Universe Was Reionized Twice
• Probing the Ionization State of the Universe at z>6
• Zero-Metallicity Stars and the Effects of the First Stars on Reionization
• The Reionization History at High Redshifts I: Physical Models and New Constraints from CMB Polarization
• Color-selected galaxies at z~6 in the Great Observatories Origins Deep Survey
• The Thermal Memory of Reionization History
• Constraints on reionization from the thermal history of the intergalactic medium
• A Limit from the X-ray Background on the Contribution of Quasars to Reionization
• Constraints from the Lyman alpha forest power spectrum
• Star Formation at z~6: The UDF-Parallel ACS Fields
• Searching for the Earliest Galaxies using the Gunn-Peterson Trough and the Lyman Alpha Emission Line
• Reionization, SLOAN, and WMAP: is the Picture Consistent?
• Observable Properties of Cosmological Reionization Sources
• A Simple Prediction on the Surface Density of Galaxies at z ~ 6

Cited by in corpus (57)

• Cosmology at Low Frequencies: The 21 cm Transition and the High-Redshift Universe
• Constraining the Evolution of the Ionizing Background and the Epoch of Reionization with z ~ 6 Quasars II: A Sample of 19 Quasars
• The Hubble Ultra Deep Field
• Observational constraints on Cosmic Reionization
• Statistics of 207 Lya Emitters at a Redshift Near 7: Constraints on Reionization and Galaxy Formation Models
• UV Luminosity Functions at z~4, 5, and 6 from the HUDF and other Deep HST ACS Fields: Evolution and Star Formation History
• Galaxies in the Hubble Ultra Deep Field: I. Detection, Multiband Photometry, Photometric Redshifts, and Morphology
• CLASH: Three Strongly Lensed Images of a Candidate z ~ 11 Galaxy
• Cosmic Variance and Its Effect on the Luminosity Function Determination in Deep High z Surveys
• The observed ionization rate of the intergalactic medium and the ionizing emissivity at z >5: Evidence for a photon starved and extended epoch of reionization
• Galaxies at z~6: The UV Luminosity Function and Luminosity Density from 506 UDF, UDF-Ps, and GOODS i-dropouts
• The Physics of the Intergalactic Medium
• Large Area Survey for z=7 Galaxies in SDF and GOODS-N: Implications for Galaxy Formation and Cosmic Reionization
• Lower-Luminosity Galaxies could reionize the Universe: Very Steep Faint-End Slopes to the UV Luminosity Functions at z>=5-8 from the HUDF09 WFC3/IR Observations
• Keeping the Universe ionised: Photo-heating and the clumping factor of the high-redshift intergalactic medium
• z~7 Galaxies in the HUDF: First Epoch WFC3/IR Results
• The Contribution of High Redshift Galaxies to Cosmic Reionization: New Results from Deep WFC3 Imaging of the Hubble Ultra Deep Field
• Galaxies at z~7-8: z-dropouts in the Hubble Ultra Deep Field
• The Galaxy Luminosity Function during the Reionization Epoch
• Candidates of z ~ 5.5--7 Galaxies in the HST Ultra Deep Field
• Observational Searches for Galaxies at z > 6
• An overdensity of galaxies at z=5.9 +/-0.2 in the Ultra Deep Field confirmed using the ACS grism
• Rest-frame Ultraviolet-to-Optical Properties of Galaxies at z ~ 6 and 5 in the Hubble Ultra Deep Field: from Hubble to Spitzer
• New Insights into the Evolution of Massive Stars and Their Effects on Our Understanding of Early Galaxies
• The Environments of High Redshift QSOs
• Constraints on the ionization sources of the high redshift intergalactic medium
• Onset of Cosmic Reionization: Evidence of An Ionized Bubble Merely 680 Myrs after the Big Bang
• Constraints on z~10 Galaxies from the Deepest HST NICMOS Fields
• The UDF05 Follow-up of the HUDF: II. Constraints on Reionization from z-dropout Galaxies
• The First Galaxies: Assembly under Radiative Feedback from the First Stars
• Evidence for a fast evolution of the UV luminosity function beyond redshift 6 from a deep HAWK-I survey of the GOODS-S field
• Candidate z~8-9 Galaxies from WFC3 Imaging
• Spatially adaptive radiation-hydrodynamical simulations of galaxy formation during cosmological reionization
• Keck Deep Fields. III. Luminosity-dependent Evolution of the Ultraviolet Luminosity and Star Formation Rate Densities at z~4, 3, and 2
• Reionisation scenarios and the temperature of the IGM
• The Effect of Galactic Properties on the Escape Fraction of Ionizing Photons
• First results from the Canada-France High-z Quasar Survey: Constraints on the z=6 quasar luminosity function and the quasar contribution to reionization
• Evidence for strong evolution of the cosmic star formation density at high redshift
• Far-Ultraviolet & X-ray Observations of VV 114: Feedback in a Local Analog to Lyman Break Galaxies
• How JWST can measure First Light, Reionization and Galaxy Assembly
• The effect of peculiar velocities on the epoch of reionization (EoR) 21-cm signal
• Constraining the Quasar Contribution to the Reionisation of Cosmic Hydrogen
• Observing the first galaxies
• The Gentle Growth of Galaxies at High Redshifts in Overdense Environments
• Probing the first galaxies with the SKA
• Star Forming Galaxies at z~6 and Reionization
• Scaling defect decay and the reionization history of the Universe
• Direct evidence for an early reionization of the Universe?
• The UDF05 Follow-up of the Hubble Ultra Deep Field. III. The Luminosity Function at z~6
• Photometric Properties of the Most Massive High-Redshift Galaxies
• Searching for the Sources Responsible for Cosmic Reionization: Probing 7 < z < 10 and Beyond
• SHARDS Frontier Fields: Physical properties of a low mass Lyman-alpha emitter at z=5.75
• Subaru narrow-band imaging search for Lyman continuum from galaxies at z>3 in the GOODS-N field
• Constraining the luminosity function of faint undetected i-dropout galaxies
• The possible detection of high redshift Type II QSOs in deep fields
• On the Reionization of the Universe
• Luminosities, Masses and Star Formation Rates of Galaxies at High Redshift (IAU279 conference proceedings)