# A Spectroscopic Redshift Measurement for a Luminous Lyman Break Galaxy at z = 7.730 Using Keck/MOSFIRE

@article{Oesch2015ASR,
title={A Spectroscopic Redshift Measurement for a Luminous Lyman Break Galaxy at z = 7.730 Using Keck/MOSFIRE},
author={Pascal A. Oesch and Pieter van Dokkum and Garth D. Illingworth and Rychard J. Bouwens and Ivelina G. Momcheva and Bradford Holden and Guido Roberts-Borsani and Renske Smit and Marijn Franx and Ivo Labb{\'e} and Valentino Gonzalez and Daniel K. Magee},
journal={The Astrophysical Journal},
year={2015},
volume={804}
}
• Published 18 February 2015
• Physics
• The Astrophysical Journal
We present a spectroscopic redshift measurement of a very bright Lyman break galaxy at $z=7.7302\pm 0.0006$ using the Keck/Multi-Object Spectrometer for Infra-Red Exploration. The source was pre-selected photometrically in the EGS field as a robust z ∼ 8 candidate with H = 25.0 mag based on optical non-detections and a very red Spitzer/IRAC [3.6]–[4.5] broad-band color driven by high equivalent width [O iii]+Hβ line emission. The Lyα line is reliably detected at $6.1\sigma$ and shows an…
141 Citations

## Figures and Tables from this paper

A spectroscopically confirmed z = 1.327 galaxy-scale deflector magnifying a z ∼ 8 Lyman-break galaxy in the Brightest of Reionizing Galaxies survey
• Physics
• 2015
We present a detailed analysis of an individual case of gravitational lensing of a $z\sim8$ Lyman-Break galaxy (LBG) in a blank field, identified in Hubble Space Telescope imaging obtained as part of
Keck/MOSFIRE Spectroscopy of z = 7-8 Galaxies: Lyα Emission from a Galaxy at z = 7.66
• Physics
• 2016
We report the results from some of the deepest Keck/Multi-Object Spectrometer For Infra-Red Exploration data yet obtained for candidate z gsim 7 galaxies. Our data show one significant line detection
Lyα EMISSION FROM A LUMINOUS z = 8.68 GALAXY: IMPLICATIONS FOR GALAXIES AS TRACERS OF COSMIC REIONIZATION
• Physics
• 2015
We report the discovery of Lyman-alpha emission (Lyα) in the bright galaxy EGSY-2008532660 (hereafter EGSY8p7) using the Multi-Object Spectrometer For Infra-Red Exploration spectrograph at the Keck
Hubble imaging of the ionizing radiation from a star-forming galaxy at z=3.2 with fesc>50%
• Physics
• 2016
Star-forming galaxies are considered to be the leading candidate sources that dominate the cosmic reionization at z>7, and the search for analogs at moderate redshift showing Lyman continuum (LyC)
PHYSICAL PROPERTIES OF SPECTROSCOPICALLY CONFIRMED GALAXIES AT z ≥ 6. III. STELLAR POPULATIONS FROM SED MODELING WITH SECURE Lyα EMISSION AND REDSHIFTS*
• Physics
• 2015
We present a study of stellar populations in a sample of spectroscopically-confirmed Lyman-break galaxies (LBGs) and Ly$\alpha$ emitters (LAEs) at $5.7<z<7$. These galaxies have deep optical and
A spectroscopic search for AGN activity in the reionization era
• Physics
• 2017
The ubiquity of Lyman alpha (Ly$\alpha$) emission in a sample of four bright [O III]-strong star-forming galaxies with redshifts above 7 has led to the suggestion that such luminous sources represent
Inferences on the timeline of reionization at z ∼ 8 from the KMOS Lens-Amplified Spectroscopic Survey
• Physics
Monthly Notices of the Royal Astronomical Society
• 2019
Detections and non-detections of Lyman alpha (Lyα) emission from z > 6 galaxies (<1 Gyr after the big bang) can be used to measure the timeline of cosmic reionization. Of key interest to measuring
A New Constraint on the Lyα Fraction of UV Very Bright Galaxies at Redshift 7
• Physics
• 2016
We study the extent to which very bright (-23.0 \textless M-UV \textless -21.75) Lyman-break-selected galaxies at redshifts z similar or equal to 7 display detectable Ly alpha emission. To explore
The Lyman Continuum Escape Survey: Ionizing Radiation from [O iii]-strong Sources at a Redshift of 3.1
• Physics
The Astrophysical Journal
• 2019
We present results from the LymAn Continuum Escape Survey (LACES), a Hubble Space Telescope (HST) program designed to characterize the ionizing radiation emerging from a sample of Lyman alpha
An extreme [O III] emitter at z = 3.2: a low metallicity Lyman continuum source
• Physics
• 2015
Aims. Cosmic reionization is an important process occurring in the early epochs of the Universe. However, because of observational limitations due to the opacity of the intergalactic medium to Lyman

## References

SHOWING 1-10 OF 46 REFERENCES
Spectroscopy of z ∼ 7 candidate galaxies: using Lyman α to constrain the neutral fraction of hydrogen in the high-redshift universe
• Physics
• 2014
Following our previous spectroscopic observations of z > 7 galaxies with Gemini/Gemini Near Infra-Red Spectrograph (GNIRS) and Very Large Telescope (VLT)/XSHOOTER, which targeted a total of eight
Keck Spectroscopy of Faint 3>z>7 Lyman Break Galaxies: A High Fraction of Line Emitters at Redshift Six
• Physics
• 2011
As Lyα photons are scattered by neutral hydrogen, a change with redshift in the Lyα equivalent width (EW) distribution of distant galaxies offers a promising probe of the degree of ionization in the
SPECTROSCOPIC CONFIRMATION OF TWO LYMAN BREAK GALAXIES AT REDSHIFT BEYOND 7
• Physics
• 2011
We report the spectroscopic confirmation of two Lyman break galaxies at redshift >7. The galaxies were observed as part of an ultra-deep spectroscopic campaign with FORS2 at the ESO/VLT for the
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
• Physics
• 2012
Using deep Keck spectroscopy of Lyman break galaxies selected from infrared imaging data taken with the Wide Field Camera 3 on board the Hubble Space Telescope, we present new evidence for a reversal
3 Evidence for Ubiquitous High-EWNebular Emission in z ∼ 7 Galaxies : towards a CleanMeasurement of the Specific Star Formation Rate Using a Sample of Bright , Magnified Galaxies
• Physics
• 2015
Growing observational evidence indicates that nebular line emission has a significant impact on the rest-frame optical fluxes of z ∼ 5− 7 galaxies. This line emission makes z ∼ 5− 7 galaxies appear
PHYSICAL PROPERTIES OF SPECTROSCOPICALLY CONFIRMED GALAXIES AT z ⩾ 6. I. BASIC CHARACTERISTICS OF THE REST-FRAME UV CONTINUUM AND Lyα EMISSION*
• Physics
• 2013
We present deep Hubble Space Telescope near-IR and Spitzer mid-IR observations of a large sample of spectroscopically confirmed galaxies at z ≥ 6. The sample consists of 51 Lyα emitters (LAEs) at z
New observations of z ∼ 7 galaxies: evidence for a patchy reionization
• Physics
• 2014
We present new results from our search for z ~ 7 galaxies from deep spectroscopic observations of candidate z dropouts in the CANDELS fields. Despite the extremely low flux limits achieved by our
A new multifield determination of the galaxy luminosity function at z = 7-9 incorporating the 2012 Hubble Ultra-Deep Field imaging
• Physics
• 2013
We present a new determination of the ultraviolet (UV) galaxy luminosity function (LF) at redshift z ≃ 7 and 8, and a first estimate at z ≃ 9. An accurate determination of the form and evolution of
A galaxy rapidly forming stars 700 million years after the Big Bang at redshift 7.51
• Physics
Nature
• 2013
A deep near-infrared spectroscopic survey of 43 photometrically-selected galaxies with z > 6.5 finds a surprisingly high star-formation rate of about 330 solar masses per year, which is more than a factor of 100 greater than that seen in the Milky Way.
KECK SPECTROSCOPY OF 3 < z < 7 FAINT LYMAN BREAK GALAXIES: THE IMPORTANCE OF NEBULAR EMISSION IN UNDERSTANDING THE SPECIFIC STAR FORMATION RATE AND STELLAR MASS DENSITY
• Physics
• 2012
The physical properties inferred from the spectral energy distributions (SEDs) of z > 3 galaxies have been influential in shaping our understanding of early galaxy formation and the role galaxies may