@techreport{2021arXiv210803675Q,
	title = {Dark-ages {Reionization} and {Galaxy} {Formation} {Simulation} {XX}. {The} {Ly}\${\textbackslash}alpha\$ {IGM} transmission properties and environment of bright galaxies during the {Epoch} of {Reionization}},
	url = {https://ui.adsabs.harvard.edu/abs/2021arXiv210803675Q},
	abstract = {The highly neutral inter-galactic medium (IGM) during the Epoch of Reionization (EoR) is expected to suppress Ly\${\textbackslash}alpha\$ emission with damping-wing absorption, causing nearly no Ly\${\textbackslash}alpha\$ detection from star-forming galaxies at \$z\{{\textbackslash}sim\}8\$. However, spectroscopic observations of the 4 brightest galaxies (\$\{{\textbackslash}rm H\}\_\{160\}\{{\textbackslash}sim\}25\$ mag) at these redshifts do reveal prominent Ly\${\textbackslash}alpha\$ line, suggesting locally ionised IGM. In this paper, we explore the Ly\${\textbackslash}alpha\$ IGM transmission and environment of bright galaxies during the EoR using the Meraxes semi-analytic model. We find brighter galaxies to be less affected by damping-wing absorption as they are effective at ionizing surrounding neutral hydrogen. Specifically, the brightest sources (\$\{{\textbackslash}rm H\}\_\{160\}\{{\textbackslash}lesssim\}25.5\$ mag) lie in the largest ionized regions in our simulation, and have low attenuation of their Ly\${\textbackslash}alpha\$ from the IGM (optical depth \$\{{\textless}\}1\$). Fainter galaxies (25.5 mag\$\{{\textless}\}\{{\textbackslash}rm H\}\_\{160\}\{{\textless}\}27.5\$ mag) have transmission that depends on UV luminosity, leading to a lower incidence of Ly\${\textbackslash}alpha\$ detection at fainter magnitudes. This luminosity-dependent attenuation explains why Ly\${\textbackslash}alpha\$ has only been observed in the brightest galaxies at \$z\{{\textbackslash}sim\}8\$. Follow-up observations have revealed counterparts in the vicinity of these confirmed \$z\{{\textbackslash}sim\}8\$ Ly\${\textbackslash}alpha\$ emitters. The environments of our modelled analogues agree with these observations in the number of nearby galaxies, which is a good indicator of whether Ly\${\textbackslash}alpha\$ can be detected among fainter galaxies. At the current observational limit, galaxies with \$\{{\textbackslash}ge\}2\$--5 neighbours within \$2'\{{\textbackslash}times\}2'\$ are \$\{{\textbackslash}sim\}2\$--3 times more likely to show Ly\${\textbackslash}alpha\$ emission. JWST will discover an order of magnitude more neighbours, revealing \$\{rsim\}50\$ galaxies in the largest ionizing bubbles and facilitating direct study of reionization morphology.},
	urldate = {2021-09-07},
	author = {Qin, Yuxiang and Wyithe, J. Stuart B. and Oesch, Pascal A. and Illingworth, Garth D. and Leonova, Ecaterina and Mutch, Simon J. and Naidu, Rohan P.},
	month = aug,
	year = {2021},
	note = {Publication Title: arXiv e-prints
ADS Bibcode: 2021arXiv210803675Q
Type: article},
	keywords = {Astrophysics - Astrophysics of Galaxies, Astrophysics - Cosmology and Nongalactic Astrophysics},
}

{"_id":"K22y5oDseEDkkS2xa","bibbaseid":"qin-wyithe-oesch-illingworth-leonova-mutch-naidu-darkagesreionizationandgalaxyformationsimulationxxthelytextbackslashalphaigmtransmissionpropertiesandenvironmentofbrightgalaxiesduringtheepochofreionization-2021","author_short":["Qin, Y.","Wyithe, J. S. B.","Oesch, P. A.","Illingworth, G. D.","Leonova, E.","Mutch, S. J.","Naidu, R. P."],"bibdata":{"bibtype":"techreport","type":"techreport","title":"Dark-ages Reionization and Galaxy Formation Simulation XX. The Ly\\${\\textbackslash}alpha\\$ IGM transmission properties and environment of bright galaxies during the Epoch of Reionization","url":"https://ui.adsabs.harvard.edu/abs/2021arXiv210803675Q","abstract":"The highly neutral inter-galactic medium (IGM) during the Epoch of Reionization (EoR) is expected to suppress Ly\\${\\textbackslash}alpha\\$ emission with damping-wing absorption, causing nearly no Ly\\${\\textbackslash}alpha\\$ detection from star-forming galaxies at \\$z\\{{\\textbackslash}sim\\}8\\$. However, spectroscopic observations of the 4 brightest galaxies (\\$\\{{\\textbackslash}rm H\\}_\\{160\\}\\{{\\textbackslash}sim\\}25\\$ mag) at these redshifts do reveal prominent Ly\\${\\textbackslash}alpha\\$ line, suggesting locally ionised IGM. In this paper, we explore the Ly\\${\\textbackslash}alpha\\$ IGM transmission and environment of bright galaxies during the EoR using the Meraxes semi-analytic model. We find brighter galaxies to be less affected by damping-wing absorption as they are effective at ionizing surrounding neutral hydrogen. Specifically, the brightest sources (\\$\\{{\\textbackslash}rm H\\}_\\{160\\}\\{{\\textbackslash}lesssim\\}25.5\\$ mag) lie in the largest ionized regions in our simulation, and have low attenuation of their Ly\\${\\textbackslash}alpha\\$ from the IGM (optical depth \\$\\{{\\textless}\\}1\\$). Fainter galaxies (25.5 mag\\$\\{{\\textless}\\}\\{{\\textbackslash}rm H\\}_\\{160\\}\\{{\\textless}\\}27.5\\$ mag) have transmission that depends on UV luminosity, leading to a lower incidence of Ly\\${\\textbackslash}alpha\\$ detection at fainter magnitudes. This luminosity-dependent attenuation explains why Ly\\${\\textbackslash}alpha\\$ has only been observed in the brightest galaxies at \\$z\\{{\\textbackslash}sim\\}8\\$. Follow-up observations have revealed counterparts in the vicinity of these confirmed \\$z\\{{\\textbackslash}sim\\}8\\$ Ly\\${\\textbackslash}alpha\\$ emitters. The environments of our modelled analogues agree with these observations in the number of nearby galaxies, which is a good indicator of whether Ly\\${\\textbackslash}alpha\\$ can be detected among fainter galaxies. At the current observational limit, galaxies with \\$\\{{\\textbackslash}ge\\}2\\$–5 neighbours within \\$2'\\{{\\textbackslash}times\\}2'\\$ are \\$\\{{\\textbackslash}sim\\}2\\$–3 times more likely to show Ly\\${\\textbackslash}alpha\\$ emission. JWST will discover an order of magnitude more neighbours, revealing \\$\\{rsim\\}50\\$ galaxies in the largest ionizing bubbles and facilitating direct study of reionization morphology.","urldate":"2021-09-07","author":[{"propositions":[],"lastnames":["Qin"],"firstnames":["Yuxiang"],"suffixes":[]},{"propositions":[],"lastnames":["Wyithe"],"firstnames":["J.","Stuart","B."],"suffixes":[]},{"propositions":[],"lastnames":["Oesch"],"firstnames":["Pascal","A."],"suffixes":[]},{"propositions":[],"lastnames":["Illingworth"],"firstnames":["Garth","D."],"suffixes":[]},{"propositions":[],"lastnames":["Leonova"],"firstnames":["Ecaterina"],"suffixes":[]},{"propositions":[],"lastnames":["Mutch"],"firstnames":["Simon","J."],"suffixes":[]},{"propositions":[],"lastnames":["Naidu"],"firstnames":["Rohan","P."],"suffixes":[]}],"month":"August","year":"2021","note":"Publication Title: arXiv e-prints ADS Bibcode: 2021arXiv210803675Q Type: article","keywords":"Astrophysics - Astrophysics of Galaxies, Astrophysics - Cosmology and Nongalactic Astrophysics","bibtex":"@techreport{2021arXiv210803675Q,\n\ttitle = {Dark-ages {Reionization} and {Galaxy} {Formation} {Simulation} {XX}. {The} {Ly}\\${\\textbackslash}alpha\\$ {IGM} transmission properties and environment of bright galaxies during the {Epoch} of {Reionization}},\n\turl = {https://ui.adsabs.harvard.edu/abs/2021arXiv210803675Q},\n\tabstract = {The highly neutral inter-galactic medium (IGM) during the Epoch of Reionization (EoR) is expected to suppress Ly\\${\\textbackslash}alpha\\$ emission with damping-wing absorption, causing nearly no Ly\\${\\textbackslash}alpha\\$ detection from star-forming galaxies at \\$z\\{{\\textbackslash}sim\\}8\\$. However, spectroscopic observations of the 4 brightest galaxies (\\$\\{{\\textbackslash}rm H\\}\\_\\{160\\}\\{{\\textbackslash}sim\\}25\\$ mag) at these redshifts do reveal prominent Ly\\${\\textbackslash}alpha\\$ line, suggesting locally ionised IGM. In this paper, we explore the Ly\\${\\textbackslash}alpha\\$ IGM transmission and environment of bright galaxies during the EoR using the Meraxes semi-analytic model. We find brighter galaxies to be less affected by damping-wing absorption as they are effective at ionizing surrounding neutral hydrogen. Specifically, the brightest sources (\\$\\{{\\textbackslash}rm H\\}\\_\\{160\\}\\{{\\textbackslash}lesssim\\}25.5\\$ mag) lie in the largest ionized regions in our simulation, and have low attenuation of their Ly\\${\\textbackslash}alpha\\$ from the IGM (optical depth \\$\\{{\\textless}\\}1\\$). Fainter galaxies (25.5 mag\\$\\{{\\textless}\\}\\{{\\textbackslash}rm H\\}\\_\\{160\\}\\{{\\textless}\\}27.5\\$ mag) have transmission that depends on UV luminosity, leading to a lower incidence of Ly\\${\\textbackslash}alpha\\$ detection at fainter magnitudes. This luminosity-dependent attenuation explains why Ly\\${\\textbackslash}alpha\\$ has only been observed in the brightest galaxies at \\$z\\{{\\textbackslash}sim\\}8\\$. Follow-up observations have revealed counterparts in the vicinity of these confirmed \\$z\\{{\\textbackslash}sim\\}8\\$ Ly\\${\\textbackslash}alpha\\$ emitters. The environments of our modelled analogues agree with these observations in the number of nearby galaxies, which is a good indicator of whether Ly\\${\\textbackslash}alpha\\$ can be detected among fainter galaxies. At the current observational limit, galaxies with \\$\\{{\\textbackslash}ge\\}2\\$--5 neighbours within \\$2'\\{{\\textbackslash}times\\}2'\\$ are \\$\\{{\\textbackslash}sim\\}2\\$--3 times more likely to show Ly\\${\\textbackslash}alpha\\$ emission. JWST will discover an order of magnitude more neighbours, revealing \\$\\{rsim\\}50\\$ galaxies in the largest ionizing bubbles and facilitating direct study of reionization morphology.},\n\turldate = {2021-09-07},\n\tauthor = {Qin, Yuxiang and Wyithe, J. Stuart B. and Oesch, Pascal A. and Illingworth, Garth D. and Leonova, Ecaterina and Mutch, Simon J. and Naidu, Rohan P.},\n\tmonth = aug,\n\tyear = {2021},\n\tnote = {Publication Title: arXiv e-prints\nADS Bibcode: 2021arXiv210803675Q\nType: article},\n\tkeywords = {Astrophysics - Astrophysics of Galaxies, Astrophysics - Cosmology and Nongalactic Astrophysics},\n}\n\n","author_short":["Qin, Y.","Wyithe, J. S. B.","Oesch, P. A.","Illingworth, G. D.","Leonova, E.","Mutch, S. J.","Naidu, R. P."],"key":"2021arXiv210803675Q","id":"2021arXiv210803675Q","bibbaseid":"qin-wyithe-oesch-illingworth-leonova-mutch-naidu-darkagesreionizationandgalaxyformationsimulationxxthelytextbackslashalphaigmtransmissionpropertiesandenvironmentofbrightgalaxiesduringtheepochofreionization-2021","role":"author","urls":{"Paper":"https://ui.adsabs.harvard.edu/abs/2021arXiv210803675Q"},"keyword":["Astrophysics - Astrophysics of Galaxies","Astrophysics - Cosmology and Nongalactic Astrophysics"],"metadata":{"authorlinks":{}}},"bibtype":"techreport","biburl":"https://bibbase.org/zotero/polyphant","dataSources":["7gvjSdWrEu7z5vjjj"],"keywords":["astrophysics - astrophysics of galaxies","astrophysics - cosmology and nongalactic astrophysics"],"search_terms":["dark","ages","reionization","galaxy","formation","simulation","textbackslash","alpha","igm","transmission","properties","environment","bright","galaxies","during","epoch","reionization","qin","wyithe","oesch","illingworth","leonova","mutch","naidu"],"title":"Dark-ages Reionization and Galaxy Formation Simulation XX. The Ly\\${\\textbackslash}alpha\\$ IGM transmission properties and environment of bright galaxies during the Epoch of Reionization","year":2021}