MMT Spectroscopy of Lyman-alpha at z$\simeq$7: Evidence for Accelerated Reionization Around Massive Galaxies

Abstract

Reionization-era galaxies tend to exhibit weak Ly$\alpha$ emission, likely reflecting attenuation from an increasingly neutral IGM. Recent observations have begun to reveal exceptions to this picture, with strong Ly$\alpha$ emission now known in four of the most massive z=7$-$9 galaxies in the CANDELS fields, all of which also exhibit intense [OIII]$+$H$\beta$ emission (EW$>$800 $\mathring{\mathrm{A}}$). To better understand why Ly$\alpha$ is anonymously strong in a subset of massive z$\simeq$7$-$9 galaxies, we have initiated an MMT/Binospec survey targeting a larger sample (N=22) of similarly luminous ($\simeq$1$-$6 L${}_{\mathrm{UV}}^{\ast }$) z$\simeq$7 galaxies selected over very wide-area fields ($\sim$3 deg${}^2$). We confidently ($>$7$\sigma$) detect Ly$\alpha$ in 78% (7/9) of galaxies with strong [OIII]$+$H$\beta$ emission (EW$>$800 $\mathring{\mathrm{A}}$) as opposed to only 8% (1/12) of galaxies with more moderate (EW=200$-$800 $\mathring{\mathrm{A}}$) [OIII]$+$H$\beta$. We argue that the higher Ly$\alpha$ EWs of the strong [OIII]$+$H$\beta$ population likely reflect enhanced ionizing photon production efficiency owing to their large sSFRs ($\gtrsim$30 Gyr${}^{-1}$). We also find evidence that Ly$\alpha$ transmission from massive galaxies declines less rapidly over $6<z<7$ than in low-mass lensed systems. In particular, our data suggest no strong evolution in Ly$\alpha$ transmission, consistent with a picture wherein massive z$\simeq$7 galaxies often reside in large ionized regions. We detect three closely-separated ($R$ = 1.7 physical Mpc) z$\simeq$7 Ly$\alpha$ emitters in our sample, conceivably tracing a large ionized structure that is consistent with this picture. We detect tentative evidence for an overdensity in this region, implying a large ionizing photon budget in the surrounding volume.

arXiv comment20 pages, 11 figures. Accepted in MNRAS with minor revisions

References in corpus (155)

• Astropy: A Community Python Package for Astronomy
• The NumPy array: a structure for efficient numerical computation
• Stellar population synthesis at the resolution of 2003
• The Astropy Project: Building an inclusive, open-science project and status of the v2.0 core package
• CANDELS: The Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey
• CANDELS: The Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey - The Hubble Space Telescope Observations, Imaging Data Products and Mosaics
• Rest-Frame Ultraviolet Spectra of z~3 Lyman Break Galaxies
• UV Luminosity Functions at redshifts z~4 to z~10: 10000 Galaxies from HST Legacy Fields
• An 800-million-solar-mass black hole in a significantly neutral Universe at redshift 7.5
• The Hyper Suprime-Cam SSP Survey: Overview and Survey Design
• Cosmic Reionization and Early Star-Forming Galaxies: A Joint Analysis of New Constraints from Planck and Hubble Space Telescope
• UltraVISTA: a new ultra-deep near-infrared survey in COSMOS
• Observational constraints on Cosmic Reionization
• The Evolution of the Galaxy Rest-Frame Ultraviolet Luminosity Function Over the First Two Billion Years
• The Pan-STARRS1 Surveys
• Statistics of 207 Lya Emitters at a Redshift Near 7: Constraints on Reionization and Galaxy Formation Models
• The Growth of HII Regions During Reionization
• The Subaru/XMM-Newton Deep Survey (SXDS). IV. Evolution of Lya Emitters from z=3.1 to 5.7 in the 1 deg^2 Field: Luminosity Functions and AGN
• New Constraints on Cosmic Reionization from the 2012 Hubble Ultra Deep Field Campaign
• Model-independent evidence in favor of an end to reionization by z~6
• Second Data Release of the Hyper Suprime-Cam Subaru Strategic Program
• The Abundance of Star-Forming Galaxies in the Redshift Range 8.5 to 12: New Results from the 2012 Hubble Ultra Deep Field Campaign
• COSMOS : Hubble Space Telescope Observations
• An updated analytic model for the attenuation by the intergalactic medium
• Efficient Simulations of Early Structure Formation and Reionization
• The 2013 Release of Cloudy
• 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
• The MOSFIRE Deep Evolution Field (MOSDEF) Survey: Rest-Frame Optical Spectroscopy for ~1500 H-Selected Galaxies at 1.37 < z < 3.8
• Reionization after Planck: The Derived Growth of the Cosmic Ionizing Emissivity now matches the Growth of the Galaxy UV Luminosity Density
• Evidence of patchy hydrogen reionization from an extreme Ly$\alpha$ trough below redshift six
• Modelling and interpreting spectral energy distributions of galaxies with BEAGLE
• UV-Continuum Slopes of >4000 z~4-8 Galaxies from the HUDF/XDF, HUDF09, ERS, CANDELS-South, and CANDELS-North Fields
• A new multi-field determination of the galaxy luminosity function at z=7-9 incorporating the 2012 Hubble Ultra Deep Field imaging
• The Dearth of z~10 Galaxies in all HST Legacy Fields -- The Rapid Evolution of the Galaxy Population in the First 500 Myr
• Spectroscopic Confirmation of Three z-Dropout Galaxies at z = 6.844 - 7.213: Demographics of Lyman-Alpha Emission in z ~ 7 Galaxies
• Reionization of the Intergalactic Medium and the Damping Wing of the Gunn-Peterson Trough
• Directly Observing the Galaxies Likely Responsible for Reionization
• The Universe is Reionizing at z~7: Bayesian Inference of the IGM Neutral Fraction Using Ly$\alpha$ Emission from Galaxies
• Cosmic Reionization after Planck: Could Quasars Do It All?
• Lyman-alpha and CIII] Emission in z=7-9 Galaxies: Accelerated Reionization Around Luminous Star Forming Systems?
• The morphology of HII regions during reionization
• The VISTA Deep Extragalactic Observations (VIDEO) Survey
• The Reionization of the Universe by the First Stars and Quasars
• Luminosity functions of Lyman-alpha emitters at z=6.5, and z=5.7: evidence against reionization at z=6
• Modelling the nebular emission from primeval to present-day star-forming galaxies
• The Evolution of the Galaxy Stellar Mass Function at z= 4-8: A Steepening Low-mass-end Slope with Increasing Redshift
• Quantitative Constraints on the Reionization History from the IGM Damping Wing Signature in Two Quasars at z > 7
• Evidence for Ubiquitous, High-EW Nebular Emission in z~7 Galaxies: Towards a Clean Measurement of the Specific Star Formation Rate using a Sample of Bright, Magnified Galaxies
• Rapid Reionization by the Oligarchs: The Case for Massive, UV-Bright, Star-Forming Galaxies with High Escape Fractions
• Spectroscopic confirmation of z~7 LBGs: probing the earliest galaxies and the epoch of reionization
• Lyman Alpha Emitting Galaxies as a Probe of Reionization
• The Spectral Energy Distributions Of z~8 Galaxies From The IRAC Ultra Deep Fields: Emission Lines, Stellar Masses, And Specific Star Formation Rates At 650 Myr
• 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
• Line Emitting Galaxies Beyond a Redshift of 7: An Improved Method for Estimating the Evolving Neutrality of the Intergalactic Medium
• New observations of z~7 galaxies: evidence for a patchy reionization
• A Rapidly Star-forming Galaxy 700 Million Years After the Big Bang at z=7.51
• Keck Spectroscopy of Faint 3<z<7 Lyman Break Galaxies:- II. A High Fraction of Line Emitters at Redshift Six
• Large Lyman-alpha opacity fluctuations and low CMB tau in models of late reionization with large islands of neutral hydrogen extending to z<5.5
• Lyman-alpha Emission from a Luminous z=8.68 Galaxy: Implications for Galaxies as Tracers of Cosmic Reionization
• Inferences on the Timeline of Reionization at z~8 From the KMOS Lens-Amplified Spectroscopic Survey
• Completing the Census of Ly-alpha Emitters at the Reionization Epoch
• A Spectroscopic Redshift Measurement for a Luminous Lyman Break Galaxy at z=7.730 using Keck/MOSFIRE
• Planck intermediate results. XLVII. Planck constraints on reionization history
• Detection of an oxygen emission line from a high redshift galaxy in the reionization epoch
• Probing reionization with Lyman-alpha emission lines
• Z > 7 galaxies with red Spitzer/IRAC [3.6]-[4.5] colors in the full CANDELS data set: the brightest-known galaxies at Z ~ 7-9 and a probable spectroscopic confirmation at Z=7.48
• A lack of evolution in the very bright-end of the galaxy luminosity function from z = 8-10
• Very Strong Emission-Line Galaxies in the WISP Survey and Implications for High-Redshift Galaxies
• Great Optically Luminous Dropout Research Using Subaru HSC (GOLDRUSH). I. UV Luminosity Functions at $z\sim 4-7$ Derived with the Half-Million Dropouts on the 100 deg${}^2$ Sky
• Star Formation at $4<z<6$ From the Spitzer Large Area Survey with Hyper-Suprime-Cam (SPLASH)
• The bright end of the galaxy luminosity function at z ~ 7: before the onset of mass quenching?
• An Atlas of z=5.7 and z=6.5 Ly alpha Emitters
• The changing Lya optical depth in the range 6<z<9 from MOSFIRE spectroscopy of Y-dropouts
• Lyman-Alpha-Emitting Galaxies at z = 2.1 in ECDF-S: Building Blocks of Typical Present-day Galaxies?
• Rapid Decline of Lyman-alpha Emission Toward the Reionization Era
• Spectroscopic confirmation of two Lyman break galaxies at redshift beyond 7
• A Significantly Neutral Intergalactic Medium Around the Luminous z=7 Quasar J0252-0503
• Constraining the neutral fraction of hydrogen in the IGM at redshift 7.5
• The Ly-alpha Properties of Faint Galaxies at z2-3 with Systemic Redshifts and Velocity Dispersions from Keck-MOSFIRE
• Simultaneous Multicolor Detection of Faint Galaxies in the Hubble Deep Field
• Long troughs in the Lyman-$\alpha$ forest below redshift 6 due to islands of neutral hydrogen
• The Spitzer Extragalactic Representative Volume Survey (SERVS): survey definition and goals
• High-precision Photometric Redshifts from Spitzer/IRAC: Extreme [3.6]-[4.5] Colors Identify Galaxies in the Redshift Range z~6.6-6.9
• MMT/MMIRS spectroscopy of $z=1.3-2.4$ extreme [OIII] emitters: Implications for galaxies in the reionization-era
• Accelerated Evolution of Ly$\alpha$ Luminosity Function at $\text{z}\gtrsim 7$ Revealed by the Subaru Ultra-Deep Survey for Ly$\alpha$ Emitters at $\text{z}=7.3$
• The Relationship Between Stellar Populations and Lyman Alpha Emission in Lyman Break Galaxies
• Unveiling the nature of bright z ~ 7 galaxies with the Hubble Space Telescope
• Tracing the reionization epoch with ALMA: [CII] emission in z~7 galaxies
• The lack of intense Lyman~alpha in ultradeep spectra of z=7 candidates in GOODS-S: imprint of reionization?
• Are we witnessing the epoch of reionisation at $z=7.1$ from the spectrum of J1120+0641?
• First Results from the Lyman Alpha Galaxies in the Epoch of Reionization (LAGER) Survey: Cosmological Reionization at z ~ 7
• Star formation and the interstellar medium in z>6 UV-luminous Lyman-break galaxies
• The [OIII]$+$H$\beta$ Equivalent Width Distribution at z$\simeq$7: Implications for the Contribution of Galaxies to Reionization
• Spectroscopy of z ~ 7 candidate galaxies: Using Lyman-alpha to constrain the neutral fraction of hydrogen in the high-redshift universe
• The First Systematic Survey for Lyman Alpha Emitters at z=7.3 with Red-sensitive Subaru/Suprime-Cam
• Quasar Strömgren Spheres Before Cosmological Reionization
• Evolution of the Sizes of Galaxies over 7<z<12 Revealed by the 2012 Hubble Ultra Deep Field Campaign
• Observational Searches for Galaxies at z > 6
• SILVERRUSH. III. Deep Optical and Near-Infrared Spectroscopy for Lya and UV-Nebular Lines of Bright Lya Emitters at z=6-7
• No missing photons for reionization: moderate ionizing photon escape fractions from the FIRE-2 simulations
• The GREATS H$\beta$+[OIII] Luminosity Function and Galaxy Properties at $\mathbf{z}\sim 8$: Walking the Way of JWST
• Gas Clumping in Self-Consistent Reionisation Models
• Binospec: A Wide-field Imaging Spectrograph for the MMT
• CANDELSz7: a large spectroscopic survey of CANDELS galaxies in the reionization epoch
• A spectroscopic search for AGN activity in the reionization era
• Observing the tail of reionization: neutral islands in the $z=5.5$ Lyman-$\alpha$ Forest
• New Insights on Ly-alpha and Lyman Continuum Radiative Transfer in the Greenest Peas
• The Brightest $z\gtrsim 8$ Galaxies over the COSMOS UltraVISTA Field
• The origin of the escape of Lyman alpha and ionizing photons in Lyman Continuum Emitters
• The Global History of Reionisation
• Galactic porosity and a star formation threshold for the escape of ionising radiation from galaxies
• Self-consistent proto-globular cluster formation in cosmological simulations of high-redshift galaxies
• The Star Formation Demographics of Galaxies in the Local Volume
• Lyman-alpha Emitters During the Early Stages of Reionization
• Physical properties and H-ionizing-photon production rates of extreme nearby star-forming regions
• Beacons into the Cosmic Dark Ages: Boosted transmission of Ly$\alpha$ from UV bright galaxies at $z\gtrsim 7$
• The Rest-Frame Optical Spectroscopic Properties of Ly$\alpha$-Emitters at $z\sim 2.5$: The Physical Origins of Strong Ly$\alpha$ Emission
• Measurement of Galaxy Clustering at z~7.2 and the Evolution of Galaxy Bias from 3.8<z<8 in the XDF, GOODS-S AND GOODS-N
• Inferences on the distribution of Ly-alpha emission of z~7 and z~8 galaxies
• Non-parametric analysis of the rest-frame UV sizes and morphological disturbance amongst L* galaxies at 4<z<8
• Onset of Cosmic Reionization: Evidence of An Ionized Bubble Merely 680 Myrs after the Big Bang
• Measuring the properties of reionised bubbles with resolved Lyman alpha spectra
• A VLT/FORS2 view at $z\sim 6$: Lyman-$\alpha$ emitter fraction and galaxy physical properties at the edge of the epoch of cosmic reionization
• The physical properties of Lyalpha emitting galaxies: not just primeval galaxies?
• Spectroscopic Constraints on UV Metal Line Emission at z~6-9: The Nature of Lyman-alpha Emitting Galaxies in the Reionization-Era
• The Impact of Scatter in the Galaxy UV Luminosity to Halo Mass Relation on Ly$\alpha$ Visibility During the Epoch of Reionization
• A New Constraint on Reionization from Evolution of the Ly$\alpha$ Luminosity Function at $z\sim 6-7$ Probed by a Deep Census of $z=7.0$ Ly$\alpha$ Emitter Candidates to 0.3 $L^{\ast }$
• Spitzer Matching survey of the UltraVISTA ultra-deep Stripes (SMUVS): Full-mission IRAC Mosaics and Catalogs
• Newly Discovered Bright z~9-10 Galaxies and Improved Constraints on Their Prevalence Using the Full CANDELS Area
• First observational support for overlapping reionized bubbles generated by a galaxy overdensity
• Spatially adaptive radiation-hydrodynamical simulations of galaxy formation during cosmological reionization
• Hydrodynamic Response of the Intergalactic Medium to Reionization
• The Distribution of Bubble Sizes During Reionization
• Undetected Sources Allow Transmission of the Lyman-alpha Line From Galaxies Prior to Reionization
• Lyman-alpha emitters gone missing: the different evolution of the bright and faint populations
• Spectroscopic investigation of a reionized galaxy overdensity at z=7
• A New Constraint on the Ly$\alpha$ Fraction of UV Very Bright Galaxies at Redshift 7
• The Hydrodynamic Feedback of Cosmic Reionization on Small-Scale Structures and Its Impact on Photon Consumption during the Epoch of Reionization
• Keck/MOSFIRE Spectroscopy of z=7-8 Galaxies: Ly$\alpha$ Emission from a Galaxy at z=7.66
• First results from Faint Infrared Grism Survey (FIGS): first simultaneous detection of Lyman-alpha emission and Lyman break from a galaxy at z=7.51
• Probing the Reionization History Using the Spectra of High-Redshift Sources
• Binospec Software System
• The VIMOS Ultra Deep Survey: Ly$\alpha$ Emission and Stellar Populations of Star-Forming Galaxies at 2<z<2.5
• HST imaging of the brightest z~8-9 galaxies from UltraVISTA: the extreme bright end of the UV luminosity function
• Spectroscopically Confirmed Lyman-Alpha Emitters from Redshift 5 to 7 Behind Ten Galaxy Cluster Lenses
• First Spectroscopic Confirmations of z ~ 7.0 Lya Emitting Galaxies in the LAGER Survey
• Optical Line Emission from z$\sim$6.8 Sources with Deep Constraints on Ly$\alpha$ Visibility
• On the AGN nature of two UV bright sources at z_spec~5.5 in the CANDELS fields: an update of the AGN space density at M1450~-22.5
• Extreme emission-line galaxies out to z$\sim$1 in zCOSMOS. I. Sample and characterization of global properties
• The Number Density Evolution of Extreme Emission Line Galaxies in 3D-HST: Results from a Novel Automated Line Search Technique for Slitless Spectroscopy
• Discovery of a z = 7.452 High Equivalent Width Lyman-α Emitter from the Hubble Space Telescope Faint Infrared Grism Survey
• Texas Spectroscopic Search for Ly$\alpha$ Emission at the End of Reionization I. Constraining the Ly$\alpha$ Equivalent Width Distribution at 6.0 < $z$ < 7.0
• Resolved Lyman-α properties of a luminous Lyman-break galaxy in a large ionised bubble at z = 6.53
• Evidence for Reduced Specific Star Formation Rates in the Centers of Massive Galaxies at z = 4
• The SpeX Prism Library: 1000+ Low-resolution, Near-infrared Spectra of Ultracool M, L, T and Y Dwarfs

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