Following the Cosmic Evolution of Pristine Gas II: The search for Pop III-Bright Galaxies. Sarmento, R., Scannapieco, E., & Cohen, S. ArXiv e-prints, 1710:arXiv:1710.09878, October, 2017. ![Following the Cosmic Evolution of Pristine Gas II: The search for Pop III-Bright Galaxies [link]](https://bibbase.org/img/filetypes/link.svg "link")
Paper abstract bibtex Direct observational searches for Population III (Pop III) stars at high-redshift are faced with the question of how to select the most promising targets for spectroscopic follow up. To help answer this, we use a large-scale cosmological simulation, augmented with a new subgrid model that tracks the fraction of pristine gas, to follow the evolution of high-redshift galaxies and the Pop III stars they contain. We generate rest-frame ultraviolet (UV) luminosity functions for our galaxies and find that they are consistent with current \$z {\textbackslash}ge 7 \$ observations. Throughout the redshift range \$7 {\textbackslash}le z {\textbackslash}le 16\$ we identify 'Pop III-bright' galaxies as those with at least 75% of their flux coming from Pop III stars. While less than 5% of galaxies brighter than \$m_\{{\textbackslash}rm UV, AB\} = 31.4\$ mag are Pop III-bright between \$7{\textbackslash}leq z {\textbackslash}leq8\$, roughly a third of such galaxies are Pop III-bright at \$z=9\$, right before reionization occurs in our simulation. Moving to \$z=10\$, \$m_\{p̌hantom{\}}{\textbackslash}rm UV, ABp̌hantom{\{}\} = 31.4\$ mag corresponds to more luminous galaxies and the Pop III-bright fraction falls off to 15%. Finally at the highest redshifts, a large fraction of all galaxies are Pop III-bright regardless of magnitude. While \$m_\{{\textbackslash}rm UV, AB\} = 31.4\$ mag galaxies are likely not detectable during this epoch, we find 90% of galaxies at \$z = 16\$ are Pop III-bright with \$m_\{{\textbackslash}rm UV, AB\} {\textbackslash}le 33\$ mag, a lensed magnitude limit within reach of the James Webb Space Telescope. Thus we predict that the best redshift to search for luminous Pop III-bright galaxies is just before reionization, while lensing surveys for fainter galaxies should push to the highest redshifts possible.
@article{sarmento_following_2017,
title = {Following the {Cosmic} {Evolution} of {Pristine} {Gas} {II}: {The} search for {Pop} {III}-{Bright} {Galaxies}},
volume = {1710},
shorttitle = {Following the {Cosmic} {Evolution} of {Pristine} {Gas} {II}},
url = {http://adsabs.harvard.edu/abs/2017arXiv171009878S},
abstract = {Direct observational searches for Population III (Pop III) stars at
high-redshift are faced with the question of how to select the most
promising targets for spectroscopic follow up. To help answer this, we
use a large-scale cosmological simulation, augmented with a new subgrid
model that tracks the fraction of pristine gas, to follow the evolution
of high-redshift galaxies and the Pop III stars they contain. We
generate rest-frame ultraviolet (UV) luminosity functions for our
galaxies and find that they are consistent with current \$z {\textbackslash}ge 7 \$
observations. Throughout the redshift range \$7 {\textbackslash}le z {\textbackslash}le 16\$ we identify
'Pop III-bright' galaxies as those with at least 75\% of their flux
coming from Pop III stars. While less than 5\% of galaxies brighter than
\$m\_\{{\textbackslash}rm UV, AB\} = 31.4\$ mag are Pop III-bright between \$7{\textbackslash}leq z {\textbackslash}leq8\$,
roughly a third of such galaxies are Pop III-bright at \$z=9\$, right
before reionization occurs in our simulation. Moving to \$z=10\$, \$m\_\{\vphantom{\}}{\textbackslash}rm
UV, AB\vphantom{\{}\} = 31.4\$ mag corresponds to more luminous galaxies and the Pop
III-bright fraction falls off to 15\%. Finally at the highest redshifts,
a large fraction of all galaxies are Pop III-bright regardless of
magnitude. While \$m\_\{{\textbackslash}rm UV, AB\} = 31.4\$ mag galaxies are likely not
detectable during this epoch, we find 90\% of galaxies at \$z = 16\$ are
Pop III-bright with \$m\_\{{\textbackslash}rm UV, AB\} {\textbackslash}le 33\$ mag, a lensed magnitude
limit within reach of the James Webb Space Telescope. Thus we predict
that the best redshift to search for luminous Pop III-bright galaxies is
just before reionization, while lensing surveys for fainter galaxies
should push to the highest redshifts possible.},
journal = {ArXiv e-prints},
author = {Sarmento, Richard and Scannapieco, Evan and Cohen, Seth},
month = oct,
year = {2017},
keywords = {Astrophysics - Astrophysics of Galaxies},
pages = {arXiv:1710.09878},
}
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We generate rest-frame ultraviolet (UV) luminosity functions for our galaxies and find that they are consistent with current \\$z {\\textbackslash}ge 7 \\$ observations. Throughout the redshift range \\$7 {\\textbackslash}le z {\\textbackslash}le 16\\$ we identify 'Pop III-bright' galaxies as those with at least 75% of their flux coming from Pop III stars. While less than 5% of galaxies brighter than \\$m_\\{{\\textbackslash}rm UV, AB\\} = 31.4\\$ mag are Pop III-bright between \\$7{\\textbackslash}leq z {\\textbackslash}leq8\\$, roughly a third of such galaxies are Pop III-bright at \\$z=9\\$, right before reionization occurs in our simulation. Moving to \\$z=10\\$, \\$m_\\{p̌hantom{\\}}{\\textbackslash}rm UV, ABp̌hantom{\\{}\\} = 31.4\\$ mag corresponds to more luminous galaxies and the Pop III-bright fraction falls off to 15%. Finally at the highest redshifts, a large fraction of all galaxies are Pop III-bright regardless of magnitude. While \\$m_\\{{\\textbackslash}rm UV, AB\\} = 31.4\\$ mag galaxies are likely not detectable during this epoch, we find 90% of galaxies at \\$z = 16\\$ are Pop III-bright with \\$m_\\{{\\textbackslash}rm UV, AB\\} {\\textbackslash}le 33\\$ mag, a lensed magnitude limit within reach of the James Webb Space Telescope. Thus we predict that the best redshift to search for luminous Pop III-bright galaxies is just before reionization, while lensing surveys for fainter galaxies should push to the highest redshifts possible.","journal":"ArXiv e-prints","author":[{"propositions":[],"lastnames":["Sarmento"],"firstnames":["Richard"],"suffixes":[]},{"propositions":[],"lastnames":["Scannapieco"],"firstnames":["Evan"],"suffixes":[]},{"propositions":[],"lastnames":["Cohen"],"firstnames":["Seth"],"suffixes":[]}],"month":"October","year":"2017","keywords":"Astrophysics - Astrophysics of Galaxies","pages":"arXiv:1710.09878","bibtex":"@article{sarmento_following_2017,\n\ttitle = {Following the {Cosmic} {Evolution} of {Pristine} {Gas} {II}: {The} search for {Pop} {III}-{Bright} {Galaxies}},\n\tvolume = {1710},\n\tshorttitle = {Following the {Cosmic} {Evolution} of {Pristine} {Gas} {II}},\n\turl = {http://adsabs.harvard.edu/abs/2017arXiv171009878S},\n\tabstract = {Direct observational searches for Population III (Pop III) stars at \nhigh-redshift are faced with the question of how to select the most\npromising targets for spectroscopic follow up. To help answer this, we\nuse a large-scale cosmological simulation, augmented with a new subgrid\nmodel that tracks the fraction of pristine gas, to follow the evolution\nof high-redshift galaxies and the Pop III stars they contain. We\ngenerate rest-frame ultraviolet (UV) luminosity functions for our\ngalaxies and find that they are consistent with current \\$z {\\textbackslash}ge 7 \\$\nobservations. Throughout the redshift range \\$7 {\\textbackslash}le z {\\textbackslash}le 16\\$ we identify\n'Pop III-bright' galaxies as those with at least 75\\% of their flux\ncoming from Pop III stars. While less than 5\\% of galaxies brighter than\n\\$m\\_\\{{\\textbackslash}rm UV, AB\\} = 31.4\\$ mag are Pop III-bright between \\$7{\\textbackslash}leq z {\\textbackslash}leq8\\$,\nroughly a third of such galaxies are Pop III-bright at \\$z=9\\$, right\nbefore reionization occurs in our simulation. Moving to \\$z=10\\$, \\$m\\_\\{\\vphantom{\\}}{\\textbackslash}rm\nUV, AB\\vphantom{\\{}\\} = 31.4\\$ mag corresponds to more luminous galaxies and the Pop\nIII-bright fraction falls off to 15\\%. Finally at the highest redshifts,\na large fraction of all galaxies are Pop III-bright regardless of\nmagnitude. While \\$m\\_\\{{\\textbackslash}rm UV, AB\\} = 31.4\\$ mag galaxies are likely not\ndetectable during this epoch, we find 90\\% of galaxies at \\$z = 16\\$ are\nPop III-bright with \\$m\\_\\{{\\textbackslash}rm UV, AB\\} {\\textbackslash}le 33\\$ mag, a lensed magnitude\nlimit within reach of the James Webb Space Telescope. Thus we predict\nthat the best redshift to search for luminous Pop III-bright galaxies is\njust before reionization, while lensing surveys for fainter galaxies\nshould push to the highest redshifts possible.},\n\tjournal = {ArXiv e-prints},\n\tauthor = {Sarmento, Richard and Scannapieco, Evan and Cohen, Seth},\n\tmonth = oct,\n\tyear = {2017},\n\tkeywords = {Astrophysics - Astrophysics of Galaxies},\n\tpages = {arXiv:1710.09878},\n}\n\n","author_short":["Sarmento, R.","Scannapieco, E.","Cohen, S."],"key":"sarmento_following_2017","id":"sarmento_following_2017","bibbaseid":"sarmento-scannapieco-cohen-followingthecosmicevolutionofpristinegasiithesearchforpopiiibrightgalaxies-2017","role":"author","urls":{"Paper":"http://adsabs.harvard.edu/abs/2017arXiv171009878S"},"keyword":["Astrophysics - Astrophysics of Galaxies"],"metadata":{"authorlinks":{}}},"bibtype":"article","biburl":"https://bibbase.org/zotero/polyphant","dataSources":["7gvjSdWrEu7z5vjjj"],"keywords":["astrophysics - astrophysics of galaxies"],"search_terms":["following","cosmic","evolution","pristine","gas","search","pop","iii","bright","galaxies","sarmento","scannapieco","cohen"],"title":"Following the Cosmic Evolution of Pristine Gas II: The search for Pop III-Bright Galaxies","year":2017}