Ultra-faint high-redshift galaxies in the Frontier Fields

Abstract

By combining cosmological simulations with Frontier Fields project lens models we find that, in the most optimistic case, galaxies as faint as $m\approx 33-34$ (AB magnitude at $1.6\mu \mathrm{m}$) can be detected in the Frontier Fields. Such faint galaxies are hosted by dark matter halos of mass $\sim 10^9{M}_{\odot }$ and dominate the ionizing photon budget over currently observed bright galaxies, thus allowing for the first time the investigation of the dominant reionization sources. In addition, the observed number of these galaxies can be used to constrain the role of feedback in suppressing star formation in small halos: for example, if galaxy formation is suppressed in halos with circular velocity $v_c<50$ km s${}^{-1}$, galaxies fainter than $m=31$ should not be detected in the FFs.

arXiv comment5 pages, 7 figures, accepted for publication in MNRAS Letters

References in corpus (27)

• Ellipsoidal collapse and an improved model for the number and spatial distribution of dark matter haloes
• UV Luminosity Functions at z~4, 5, and 6 from the HUDF and other Deep HST ACS Fields: Evolution and Star Formation History
• UV Luminosity Functions from 132 z~7 and z~8 Lyman-Break Galaxies in the ultra-deep HUDF09 and wide-area ERS WFC3/IR Observations
• 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
• Probing the Dawn of Galaxies at z~9-12: New Constraints from HUDF12/XDF and CANDELS Data
• 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
• The UV Luminosity Function of star-forming galaxies via dropout selection at redshifts z ~ 7 and 8 from the 2012 Ultra Deep Field campaign
• z~7 Galaxies in the HUDF: First Epoch WFC3/IR Results
• Galaxies at z = 6 - 9 from the WFC3/IR imaging of the HUDF
• CANDELS: The Contribution of the Observed Galaxy Population to Cosmic Reionization
• Simulating high-redshift galaxies
• Expanded Search for z~10 Galaxies from HUDF09, ERS, and CANDELS Data: Evidence for Accelerated Evolution at z>8?
• Population III Stars and Remnants in High Redshift Galaxies
• z~7 galaxy candidates from NICMOS observations over the HDF South and the CDF-S and HDF-N GOODS fields
• Steep Faint-end Slopes of Galaxy Mass and Luminosity Functions at z>=6 and the Implications for Reionisation
• z~7-10 Galaxies behind Lensing Clusters: Contrast with Field Search Results
• Candidate z~8-9 Galaxies from WFC3 Imaging
• Searching for the reionization sources
• Simulating the assembly of galaxies at redshifts z = 6 - 12
• Focusing on Warm Dark Matter with Lensed High-redshift Galaxies
• Simulating high-z Gamma-ray Burst host galaxies
• The first Frontier Fields cluster: 4.5μm excess in a z~8 galaxy candidate in Abell 2744
• Detecting gravitationally lensed population III galaxies with the Hubble Space Telescope and the James Webb Space Telescope
• Characterizing faint galaxies in the reionization epoch: LBT confirms two L<0.2L* sources at z=6.4 behind the CLASH/Frontier Fields cluster MACS0717.5+3745
• Multicolor observations of the Hubble Deep Field South
• A Search for z=7.3 Lyα Emitters behind Gravitationally Lensing Clusters

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• New Constraints on the Faint-end of the UV Luminosity Function at z~7-8 using the Gravitational Lensing of the Hubble Frontier Fields Cluster A2744
• Massive Star cluster formation under the microscope at z=6
• Strong lensing models of eight CLASH clusters from extensive spectroscopy: accurate total mass reconstructions in the cores
• Frontier Fields : Combining HST, VLT and Spitzer data to explore the $z$$\sim$8 Universe behind the lensing cluster MACS0416$-$2403
• On the faint-end of the high-$z$ galaxy luminosity function
• The Little Galaxies that Could (Reionize the Universe): Predicting Faint End Slopes & Escape Fractions at z > 4
• On the faint-end of the galaxy luminosity function in the Epoch of Reionization: updated constraints from the HST Frontier Fields
• The Impact of Strong Gravitational Lensing on Observed Lyman-Break Galaxy Numbers at 4<z<8 in the GOODS and the XDF Blank Fields
• Constraints on photoionization feedback from number counts of ultra-faint high-redshift galaxies in the Frontier Fields
• Accounting for Cosmic Variance in Studies of Gravitationally-Lensed High-Redshift Galaxies in the Hubble Frontier Field Clusters
• The Minimum Halo Mass for Star Formation at z = 6 - 8
• The Epoch of Reionization in the R_h=ct Universe
• Probing high-redshift galaxies with Ly$\alpha$ intensity mapping
• LIMFAST. I. A Semi-Numerical Tool for Line Intensity Mapping
• Impact of the turnover in the high-z galaxy luminosity function on the 21-cm signal during Cosmic Dawn and Epoch of Reionization
• Systematic search for lensed X-ray sources in the CLASH fields