New Star Forming Galaxies at z\approx 7 from WFC3 Imaging

Abstract

The addition of Wide Field Camera 3 (WFC3) on the Hubble Space Telescope (HST) has led to a dramatic increase in our ability to study the z>6 Universe. The increase in the near-infrared (NIR) sensitivity of WFC3 over previous instruments has enabled us to reach apparent magnitudes approaching 29 (AB). This allows us to probe the rest-frame ultraviolet (UV) continuum, redshifted into the NIR at $z>6$. Taking advantage of the large optical depths at this redshift, resulting in the Lyman-alpha break, we use a combination of WFC3 imaging and pre-existing Advanced Camera for Surveys (ACS) imaging to search for z approx 7 over 4 fields. Our analysis reveals 29 new z approx 7 star forming galaxy candidates in addition to 16 pre-existing candidates already discovered in these fields. The improved statistics from our doubling of the robust sample of z-drop candidates confirms the previously observed evolution of the bright end of the luminosity function.

15 pages, accepted in MNRAS

References in corpus (13)

• The Hubble Ultra Deep Field
• UV Luminosity Functions at z~4, 5, and 6 from the HUDF and other Deep HST ACS Fields: Evolution and Star Formation History
• Discovery of z~8 Galaxies in the HUDF from ultra-deep WFC3/IR Observations
• Large Area Survey for z=7 Galaxies in SDF and GOODS-N: Implications for Galaxy Formation and Cosmic Reionization
• z~7-10 Galaxies in the HUDF and GOODS fields, and their UV Luminosity Functions
• Keeping the Universe ionised: Photo-heating and the clumping factor of the high-redshift intergalactic medium
• Galaxies at z = 6 - 9 from the WFC3/IR imaging of the HUDF
• The Contribution of High Redshift Galaxies to Cosmic Reionization: New Results from Deep WFC3 Imaging of the Hubble Ultra Deep Field
• On the Stellar Populations and Evolution of Star-Forming Galaxies at 6.3 < z < 8.6
• A Deep HST Search for Escaping Lyman Continuum Flux at z~1.3: Evidence for an Evolving Ionizing Emissivity
• The UDF05 Follow-up of the HUDF: I. The Faint-End Slope of the Lyman-Break Galaxy Population at z~5
• Probing $\sim L_{\ast }$ Lyman-break Galaxies at $z\approx 7$ in GOODS-South with WFC3 on HST
• Extending the Canada-France brown Dwarfs Survey to the near-infrared: first ultracool brown dwarfs from CFBDSIR

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• Statistics of 207 Lya Emitters at a Redshift Near 7: Constraints on Reionization and Galaxy Formation Models
• 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
• Keck Spectroscopy of Faint 3<z<7 Lyman Break Galaxies: - I. New constraints on cosmic reionisation from the luminosity and redshift-dependent fraction of Lyman-alpha emission
• A new multi-field determination of the galaxy luminosity function at z=7-9 incorporating the 2012 Hubble Ultra Deep Field imaging
• Spectroscopic Confirmation of Three z-Dropout Galaxies at z = 6.844 - 7.213: Demographics of Lyman-Alpha Emission in z ~ 7 Galaxies
• Keck Spectroscopy of Faint 3<z<8 Lyman Break Galaxies:- Evidence for a Declining Fraction of Emission Line Sources In the Redshift Range 6<z<8
• New observations of z~7 galaxies: evidence for a patchy reionization
• The UV Luminosity Function of star-forming galaxies via dropout selection at redshifts z ~ 7 and 8 from the 2012 Ultra Deep Field campaign
• CANDELS: The Contribution of the Observed Galaxy Population to Cosmic Reionization
• An Intensely Star-Forming Galaxy at z~7 with Low Dust and Metal Content Revealed by Deep ALMA and HST Observations
• JADES NIRSpec Initial Data Release for the Hubble Ultra Deep Field: Redshifts and Line Fluxes of Distant Galaxies from the Deepest JWST Cycle 1 NIRSpec Multi-Object Spectroscopy
• Spectroscopy of z ~ 7 candidate galaxies: Using Lyman-alpha to constrain the neutral fraction of hydrogen in the high-redshift universe
• The LyA-LyC Connection: Evidence for an Enhanced Contribution of UV-faint Galaxies to Cosmic Reionization
• Evolution of the Sizes of Galaxies over 7<z<12 Revealed by the 2012 Hubble Ultra Deep Field Campaign
• The UV Properties of Star Forming Galaxies I: HST WFC3 Observations of Very-high Redshift Galaxies
• First Light And Reionisation Epoch Simulations (FLARES) I: Environmental Dependence of High-Redshift Galaxy Evolution
• The Bright End of the UV Luminosity Function at z~8: New Constraints from CANDELS Data in GOODS-South
• Expanded Search for z~10 Galaxies from HUDF09, ERS, and CANDELS Data: Evidence for Accelerated Evolution at z>8?
• Discovery of a protocluster at z~6
• First Light And Reionisation Epoch Simulations (FLARES) II: The Photometric Properties of High-Redshift Galaxies
• No Evidence for Lyman-alpha Emission in Spectroscopy of z > 7 Candidate Galaxies
• Legacy of star formation in the pre-reionization universe
• z~7 galaxy candidates from NICMOS observations over the HDF South and the CDF-S and HDF-N GOODS fields
• The properties of the first galaxies in the BLUETIDES simulation
• Steep Faint-end Slopes of Galaxy Mass and Luminosity Functions at z>=6 and the Implications for Reionisation
• Dark-ages reionization & galaxy formation simulation IV: UV luminosity functions of high-redshift galaxies
• Candidate z~8-9 Galaxies from WFC3 Imaging
• First Light And Reionisation Epoch Simulations (FLARES) V: The redshift frontier
• Interpreting the observed UV continuum slopes of high-redshift galaxies
• Quantifying the UV continuum slopes of galaxies to z~10 using deep Hubble and Spitzer/IRAC observations
• A critical analysis of the UV Luminosity Function at redshift~7 from deep WFC3 data
• A Large Population of Faint 8<z<16 Galaxies Found in the First JWST NIRCam Observations of the NGDEEP Survey
• The Lyman-continuum photon production efficiency in the high-redshift Universe
• The unbiased measurement of UV spectral slopes in low luminosity galaxies at z=7
• The rest-frame UV luminosity function at $z\simeq 4$: a significant contribution of AGN to the bright-end of the galaxy population
• Duty Cycle and the Increasing Star Formation History of z>=6 Galaxies
• Luminous and High Stellar Mass Candidate Galaxies at z ~ 8 Discovered in CANDELS
• The UV colours and dust attenuation of Lyman-break galaxies
• Constraining the Bright-end of the UV Luminosity Function for z ~ 7 - 9 Galaxies: results from CANDELS/GOODS-South
• Observing the first galaxies
• Theoretical predictions for the effect of nebular emission on the broad band photometry of high-redshift galaxies
• High-redshift galaxies and low-mass stars
• Simulating and interpreting deep observations in the Hubble Ultra Deep Field with the JWST/NIRSpec low-resolution 'prism'
• Predictions for the intrinsic UV continuum properties of star forming galaxies and the implications for inferring dust extinction
• The Photometric Properties of Galaxies in the Early Universe
• Galaxy formation in the PLANCK cosmology - III. The high-redshift universe
• Hubble Space Telescope Wide Field Camera 3 Observations of Escaping Lyman Continuum Radiation from Galaxies and Weak AGN at Redshifts $z$$\simeq$2.3-4.1
• The accuracy of the UV continuum as an indicator of the star formation rate in galaxies
• Characterization and modeling of contamination for Lyman break galaxy samples at high redshift
• A 52 hours VLT/FORS2 spectrum of a bright z~7 HUDF galaxy: no Ly-alpha emission
• Lyman-Break Galaxies at $z\sim 3$ in the Subaru Deep Field: Luminosity Function, Clustering and [OIII] Emission
• Satellite Survival in Highly Resolved Milky Way Class Halos
• The Contribution of Supernovae to Cosmic Reionization
• The Taiwan ECDFS Near-Infrared Survey: Very Bright End of the Luminosity Function at z>7
• Confronting predictions of the galaxy stellar mass function with observations at high-redshift
• How Does Feedback Affect Milky Way Satellite Formation?
• Luminosities, Masses and Star Formation Rates of Galaxies at High Redshift (IAU279 conference proceedings)
• Exploring the Dawn of Galaxies