Lyα Halos around [O III]-Selected Galaxies in HETDEX

Abstract

We present extended Lyman-α (Lyα) emission out to 800 kpc of 1034 [O III]-selected galaxies at redshifts 1.9<z<2.35 using the Hobby-Eberly Telescope Dark Energy Experiment (HETDEX). The locations and redshifts of the galaxies are taken from the 3D-HST survey. The median-stacked surface brightness profile of Lyα emission of the [O III]-selected galaxies agrees well with that of 968 bright Lyα-emitting galaxies (LAEs) at r>40 kpc from the galaxy centers. The surface brightness in the inner parts (r<10 kpc) around the [O III]-selected galaxies, however, is ten times fainter than that of the LAEs. Our results are consistent with the notion that photons dominating the outer regions of the Lyα halos are not produced in the central galaxies but originate outside of them.

arXiv comment7 pages, 3 figures, accepted by Astrophysical Journal Letters

References in corpus (43)

• SciPy 1.0--Fundamental Algorithms for Scientific Computing in Python
• Array Programming with NumPy
• Gaia Data Release 2. Summary of the contents and survey properties
• The Astropy Project: Building an inclusive, open-science project and status of the v2.0 core package
• The Dust Content and Opacity of Actively Star-Forming Galaxies
• Statistical Properties of X-ray Clusters: Analytic and Numerical Comparisons
• 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
• UniverseMachine: The Correlation between Galaxy Growth and Dark Matter Halo Assembly from z=0-10
• The 3D-HST Survey: Hubble Space Telescope WFC3/G141 grism spectra, redshifts, and emission line measurements for $\sim 100,000$ galaxies
• 3D-HST: A wide-field grism spectroscopic survey with the Hubble Space Telescope
• 3D Lyman-alpha radiation transfer. I. Understanding Lyman-alpha line profile morphologies
• Diffuse Lyman Alpha Emitting Halos: A Generic Property of High Redshift Star Forming Galaxies
• Lyman Alpha Radiation From Collapsing Protogalaxies I: Characteristics of the Emergent Spectrum
• Extended Lyman alpha haloes around individual high-redshift galaxies revealed by MUSE
• Lyman Alpha Cooling Radiation from High-Redshift Halos
• A Cosmic UV/X-ray Background Model Update
• Fluorescent Ly-alpha emission from the high-redshift intergalactic medium
• Lyman Alpha Blobs as an Observational Signature of Cold Accretion Streams into Galaxies
• Nearly all the sky is covered by Lyman-alpha emission around high redshift galaxies
• The HETDEX Instrumentation: Hobby-Eberly Telescope Wide Field Upgrade and VIRUS
• Imaging the Lyman-alpha Forest
• The star-formation rate density from z = 0-6
• Average Metallicity and Star Formation Rate of Lya Emitters Probed by a Triple Narrow-Band Survey
• The Hobby-Eberly Telescope Dark Energy Experiment (HETDEX) Survey Design, Reductions, and Detections
• The Rest-Frame Optical Spectroscopic Properties of Ly$\alpha$-Emitters at $z\sim 2.5$: The Physical Origins of Strong Ly$\alpha$ Emission
• The Mean Ultraviolet Spectrum of a Representative Sample of Faint z~3 Lyman Alpha Emitters
• The Effects of Stellar Population and Gas Covering Fraction on the Emergent Lyman Alpha Emission of High-Redshift Galaxies
• The physical origins and dominant emission mechanisms of Lyman-alpha halos: results from the TNG50 simulation in comparison to MUSE observations
• A High Fraction of Ly-alpha-Emitters Among Galaxies with Extreme Emission Line Ratios at z ~ 2
• HST Emission Line Galaxies at z ~ 2: Comparing Physical Properties of Lyman Alpha and Optical Emission Line Selected Galaxies
• The VIMOS Ultra Deep Survey: Ly$\alpha$ Emission and Stellar Populations of Star-Forming Galaxies at 2<z<2.5
• Direct evidence for Ly$\alpha$ depletion in the protocluster core
• Small-scale Intensity Mapping: Extended Ly$\alpha$, H$\alpha$ and Continuum emission as a Probe of Halo Star Formation in High-redshift Galaxies
• Predicting Ly$\alpha$ Emission from Galaxies via Empirical Markers of Production and Escape in the KBSS
• Lyman Alpha Reference Sample: X. Predicting Lyman alpha output from starforming galaxies using multivariate regression
• The MUSE eXtremely Deep Field: Individual detections of Lyα haloes around rest-frame UV-selected galaxies at z~2.9-4.4
• Surface Brightness Profile of Lyman-$\alpha$ Halos out to 320 kpc in HETDEX
• MCSED: A flexible spectral energy distribution fitting code and its application to $z\sim 2$ emission-line galaxies
• The HETDEX Survey: The Ly$\alpha$ Escape Fraction from 3D-HST Emission Line Galaxies at $z\sim 2$
• SILVERRUSH. XI. Intensity Mapping for Lya Emission Extending over $100-1000$ comoving kpc around $z\sim 2-7$ LAEs with Subaru HSC-SSP and CHORUS Data
• Galaxies of the $z\sim 2$ Universe. I. Grism-Selected Rest-Frame Optical Emission Line Galaxies
• The $z\sim 2$ $[\mathrm{O}\mathrm{III}]$ Luminosity Function of Grism-selected Emission-line Galaxies

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• The cosmic web in Lyman-alpha emission
• Median Surface Brightness Profiles of Lyman-$\alpha$ Haloes in the MUSE Extremely Deep Field
• A multi-tracer empirically-driven approach to line-intensity mapping lightcones
• UV & Ly$\alpha$ halos of Ly$\alpha$ emitters across environments at z=2.84
• Emission-line Stacking of 21cm Intensity Maps with MeerKLASS: Inference Pipeline and Application to the L-band Deep-field Data
• Towards Accurate Modeling of Line-Intensity Mapping One-Point Statistics: Including Extended Profiles
• The Lyman-alpha and Continuum Origins Survey II: the connection between the escape of ionizing radiation and Lyman-alpha halos in star-forming galaxies
• Removal of interloper contamination to line-intensity maps using correlations with ancillary tracers of the large-scale structure
• Lyα Intensity Mapping in HETDEX: Galaxy-Lyα Intensity Cross-Power Spectrum