# Extended Lyα Emission from Interacting Galaxies at High Redshifts

@article{Yajima2013ExtendedLE,
title={Extended Ly$\alpha$ Emission from Interacting Galaxies at High Redshifts},
author={Hidenobu Yajima and Yue-xing Li and Qirong Zhu},
journal={The Astrophysical Journal},
year={2013},
volume={773},
pages={151}
}
• Published 24 October 2012
• Physics
• The Astrophysical Journal
Recent observations have discovered a population of extended Lyα sources, dubbed Lyα blobs (LABs), at high redshift z � 2 6.6. These LABs typically have a luminosity of L � 10 42 10 44 erg s −1 , and a size of tens of kiloparsecs, with some giant ones reaching up to D � 100 kpc. However, the origin of these LABs is not well understood. In this paper, we investigate a merger model for the formation of LABs by studying Lyα emission from interacting galaxies at high redshifts by means of a…
19 Citations

## Figures and Tables from this paper

Infalling gas in a Lyman-α blob
• Physics
• 2020
Lyman-α blobs (LABs) are spatially extended nebulae of emission in the Lyman-α (Lyα) line of hydrogen, seen at high redshifts 1 , 2 , and most commonly found in the dense environment of star-forming
Distinctive 21 cm structures of the first stars, galaxies, and quasars
• Physics
• 2014
Observations of the redshifted 21 cm line with upcoming radio telescopes promise to transform our understanding of the cosmic reionization. To unravel the underlying physical process, we investigate
THE SPECTRALLY RESOLVED Lyα EMISSION OF THREE Lyα-SELECTED FIELD GALAXIES AT z ∼ 2.4 FROM THE HETDEX PILOT SURVEY*
• Physics
• 2013
We present new results on the spectrally resolved Lyα emission of three Lyα-emitting field galaxies at z ~ 2.4 with high Lyα equivalent width (>100 A) and Lyα luminosity (~1043 erg s–1). At 120 km
What is the physical origin of strong Lyα emission? I. Demographics of Lyα emitter structures
• Physics
• 2014
We present the results of structure analyses for a large sample of 426 Lyα emitters (LAEs) at z ∼ 2.2 that are observed with the Hubble Space Telescope/Advanced Camera for Surveys and WFC3-IR during
ALMA Observations of Lyα Blob 1: Multiple Major Mergers and Widely Distributed Interstellar Media
• Physics
The Astrophysical Journal
• 2021
We present observations of a giant Lyα blob (LAB) in the SSA22 protocluster at z = 3.1, SSA22-LAB1, taken with the Atacama Large Millimeter/submillimeter Array. Dust continuum, along with [C ii] 158
The dominant origin of diffuse Lyα halos around Lyα emitters explored by spectral energy distribution fitting and clustering analysis
• Physics
Publications of the Astronomical Society of Japan
• 2019
The physical origin of diffuse Lyα halos (LAHs) around star-forming galaxies is still a matter of debate. We present the dependence of LAH luminosity (L(Lyα)_H) on the stellar mass (M⋆), SFR, color
Mapping the low-surface brightness Universe in the UV band with Lyα emission from IGM filaments
• Physics
• 2016
A large fraction of the baryonic matter in the Universe is located in filaments in the intergalactic medium (IGM). However, the low surface brightness of these filaments has not yet allowed their
What powers Ly α blobs
• Physics
• 2015
Lyα blobs (LABs) are spatially extended Lyα? nebulae seen at high redshift. The origin of Lyα emission in the LABs is still unclear and under debate. To study their heating mechanism(s), we present
An Intensely Star-forming Galaxy at z ~ 7 with Low Dust and Metal Content Revealed by Deep ALMA and HST Observations
• Physics
• 2013
We report deep ALMA observations complemented by associated Hubble Space Telescope (HST) imaging for a luminous (m_(UV) = 25) galaxy, "Himiko," at a redshift of z = 6.595. The galaxy is remarkable
About AGN ionization echoes, thermal echoes and ionization deficits in low-redshift Lyα blobs
• Physics
• 2016
We report the discovery of 14 Lyman-alpha blobs (LABs) at z~0.3, existing at least 4-7 billion years later in the Universe than all other LABs known. Their optical diameters are 20-70 kpc, and GALEX

## References

SHOWING 1-10 OF 90 REFERENCES
Extended and Filamentary Lyα Emission from the Formation of a Protogalactic Halo at z=2.63 ⋆ †
• Physics
• 2013
We report the observation of a further asymmetric, extended Lyα emitting halo at z = 2.63, from our ultra-deep, long-slit spectroscopic survey of faint high-redshift emitters, undertaken with
Were progenitors of local L* galaxies Lyman-alpha emitters at high redshift?
• Physics
• 2011
The Lya emission has been observed from galaxies over a redshift span z ~ 0 - 8.6. However, the evolution of high-redshift Lya emitters (LAEs), and the link between these populations and local
Giant Lyα Nebulae Associated with High-redshift Radio Galaxies
• Physics
• 2003
We report deep, Keck narrowband Ly? images of the luminous z > 3 radio galaxies 4C 41.17, 4C 60.07, and B2 0902+34. The images show giant, 100-200 kpc scale, emission-line nebulae, centered on these
The Distribution of Lyα-Emitting Galaxies at z=2.38
• Physics
• 2003
We present the detection of 34 Lyα emission-line galaxy candidates in a 80 × 80 × 60 comoving Mpc region surrounding the known z = 2.38 galaxy cluster J2143-4423. The space density of Lyα emitters is
Lyα-Emitting Galaxies at z = 3.1: L* Progenitors Experiencing Rapid Star Formation*
• Physics
• 2007
We studied the clustering properties and multiwavelength spectral energy distributions of a complete sample of 162 Lyα-emitting (LAE) galaxies at z 3.1 discovered in deep narrowband MUSYC imaging of
Lyα blobs as an observational signature of cold accretion streams into galaxies
• Physics
• 2009
Recent hydrodynamic simulations of galaxy formation reveal streams of cold (T ∼ 10 4 K) gas flowing into the centres of dark matter haloes as massive as 10 12-13.5 M ⊙ at redshifts z ∼ 1-3. In this
Diffuse Lyα Emitting Halos: A Generic Property of High-redshift Star-forming Galaxies
• Physics
• 2011
Using a sample of 92 UV continuum-selected, spectroscopically identified galaxies with langzrang = 2.65, all of which have been imaged in the Lyα line with extremely deep narrow-band imaging, we
Resolving the Galaxies within a Giant Lyα Nebula: Witnessing the Formation of a Galaxy Group?
• Physics
• 2011
Detailed analysis of the substructure of Lyα nebulae can put important constraints on the physical mechanisms at work and the properties of galaxies forming within them. Using high-resolution Hubble
Systematic Survey of Extended Lyα Sources over z ~ 3-5 *
• Physics
• 2006
Spatially extended Lyα sources that are faint and compact in continuum are candidates for extremely young (107 yr) galaxies at high redshifts. We carried out a systematic survey for extended Lyα
Filamentary infall of cold gas and escape of Lyα and hydrogen ionizing radiation from an interacting high‐redshift galaxy★
• Physics
• 2011
We present observations of a peculiar Lyα-emitting galaxy at redshift z = 3.344, discovered in a deep, blind spectroscopic survey for faint Lyα emitters with the Magellan II telescope in the Hubble