Using the Bullet Cluster as a Gravitational Telescope to Study z~7 Lyman Break Galaxies

Abstract

We use imaging obtained with the Hubble Space Telescope Wide Field Camera 3 to search for z_850 dropouts at z~7 and J_110 dropouts at z~9 lensed by the Bullet Cluster. In total we find 10 z_850 dropouts in our 8.27 arcmin^2 field. Using magnification maps from a combined weak and strong lensing mass reconstruction of the Bullet Cluster and correcting for estimated completeness levels, we calculate the surface density and luminosity function of our z_850 dropouts as a function of intrinsic (accounting for magnification) magnitude. We find results consistent with published blank field surveys, despite using much shallower data, and demonstrate the effectiveness of cluster surveys in the search for z~7 galaxies.

12 pages, 2 tables, 9 figures. Accepted for publication in ApJ. V3: two new figures, improved calculation of intrinsic counts, better organization, added references; main results did not change significantly

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Cited by in corpus (28)

• CLASH: Three Strongly Lensed Images of a Candidate z ~ 11 Galaxy
• The Universe is Reionizing at z~7: Bayesian Inference of the IGM Neutral Fraction Using Ly$\alpha$ Emission from Galaxies
• New observations of z~7 galaxies: evidence for a patchy reionization
• The Brightest of Reionizing Galaxies Survey: Constraints on the Bright End of the z~8 Luminosity Function
• First Frontier Field Constraints on the Cosmic Star-Formation Rate Density at z~10 - The Impact of Lensing Shear on Completeness of High-Redshift Galaxy Samples
• CANDELSz7: a large spectroscopic survey of CANDELS galaxies in the reionization epoch
• CLASH: A Census of Magnified Star-Forming Galaxies at z ~ 6-8
• Inferences on the distribution of Ly-alpha emission of z~7 and z~8 galaxies
• The Bullet cluster at its best: weighing stars, gas and dark matter
• The first Frontier Fields cluster: 4.5μm excess in a z~8 galaxy candidate in Abell 2744
• CLASH: Discovery of a Bright z~6.2 Dwarf Galaxy Quadruply Lensed by MACS J0329.6-0211
• Detecting gravitationally lensed population III galaxies with the Hubble Space Telescope and the James Webb Space Telescope
• Luminous and High Stellar Mass Candidate Galaxies at z ~ 8 Discovered in CANDELS
• Spitzer UltRa Faint SUrvey Program (SURFS UP) I: An Overview
• Deep Learning for Strong Lensing Search: Tests of the Convolutional Neural Networks and New Candidates from KiDS DR3
• Observing the first galaxies
• Spectroscopic Confirmation of a z=6.740 Galaxy behind the Bullet Cluster
• Mapping Compound Cosmic Telescopes Containing Multiple, Projected Cluster-Scale Halos
• The Effect of Large-Scale Structure on the Magnification of High-Redshift Sources by Cluster-Lenses
• A census of optically dark massive galaxies in the early Universe from magnification by lensing galaxy clusters
• Signature of the first galaxies in JWST deep field observations
• A New Approach to Identifying the Most Powerful Gravitational Lensing Telescopes
• Measuring the Stellar Masses of z~7 Galaxies with Spitzer Ultrafaint Survey Program (SURFS UP)
• Near-Infrared Survey of the GOODS-North Field: Search for Luminous Galaxy Candidates at z=>6.5
• RCS2 J232727.6-020437: An Efficient Cosmic Telescope at $z=0.6986$
• Reconstruction of small-scale galaxy cluster substructure with lensing flexion
• Biases in physical parameter estimates through differential lensing magnification
• Measurement of differential magnification