The Lyman Continuum escape fraction of emission line-selected \$z{\textbackslash}sim2.5\$ galaxies is less than 15%. Rutkowski, M. J., Scarlata, C., Henry, A., Hayes, M., Mehta, V., Hathi, N., Cohen, S., Windhorst, R., Koekemoer, A. M., Teplitz, H. I., Haardt, F., & Siana, B. ArXiv e-prints, 1705:arXiv:1705.06355, May, 2017.
Paper abstract bibtex Recent work suggests that strong emission line, star-forming galaxies may be significant Lyman Continuum leakers. We combine archival HST broadband ultraviolet and optical imaging (F275W and F606W, respectively) with emission line catalogs derived from WFC3 IR G141 grism spectroscopy to search for escaping Lyman Continuum (LyC) emission from homogeneously selected \$z{\textbackslash}simeq\$2.5 SFGs. We detect no escaping Lyman Continuum from SFGs selected on [OII] nebular emission (N=208) and, within a narrow redshift range, on [OIII]/[OII]. We measure 1\${\textbackslash}sigma\$ upper limits to the LyC escape fraction relative to the non-ionizing UV continuum from [OII] emitters, \$f_\{esc\}{\textless}\$5.6%, and strong [OIII]/[OII]\${\textgreater}\$5 ELGs, \$f_\{esc\}{\textless}\$14.0%. Our observations are not deep enough to detect \$f_\{esc\}{\textbackslash}lesssim\$10% typical of the low redshift Lyman continuum emitters. However, we find that this population represents a small fraction of the star-forming galaxy population at \$z{\textbackslash}simeq\$2. Thus, unless the number of extreme emission line galaxies grows substantially to z\${\textgreater}\$6, such galaxies may be insufficient for reionization. Deeper survey data in the rest-frame ionizing UV will be necessary to determine whether strong line ratios could be useful for pre-selecting LyC leakers at high redshift.
@article{rutkowski_lyman_2017,
title = {The {Lyman} {Continuum} escape fraction of emission line-selected \$z{\textbackslash}sim2.5\$ galaxies is less than 15\%},
volume = {1705},
url = {http://adsabs.harvard.edu/abs/2017arXiv170506355R},
abstract = {Recent work suggests that strong emission line, star-forming galaxies
may be significant Lyman Continuum leakers. We combine archival HST
broadband ultraviolet and optical imaging (F275W and F606W,
respectively) with emission line catalogs derived from WFC3 IR G141
grism spectroscopy to search for escaping Lyman Continuum (LyC) emission
from homogeneously selected \$z{\textbackslash}simeq\$2.5 SFGs. We detect no escaping
Lyman Continuum from SFGs selected on [OII] nebular emission (N=208)
and, within a narrow redshift range, on [OIII]/[OII]. We measure
1\${\textbackslash}sigma\$ upper limits to the LyC escape fraction relative to the
non-ionizing UV continuum from [OII] emitters, \$f\_\{esc\}{\textless}\$5.6\%, and
strong [OIII]/[OII]\${\textgreater}\$5 ELGs, \$f\_\{esc\}{\textless}\$14.0\%. Our observations
are not deep enough to detect \$f\_\{esc\}{\textbackslash}lesssim\$10\% typical of the low
redshift Lyman continuum emitters. However, we find that this population
represents a small fraction of the star-forming galaxy population at
\$z{\textbackslash}simeq\$2. Thus, unless the number of extreme emission line galaxies
grows substantially to z\${\textgreater}\$6, such galaxies may be insufficient for
reionization. Deeper survey data in the rest-frame ionizing UV will be
necessary to determine whether strong line ratios could be useful for
pre-selecting LyC leakers at high redshift.},
urldate = {2017-05-25},
journal = {ArXiv e-prints},
author = {Rutkowski, Michael J. and Scarlata, Claudia and Henry, Alaina and Hayes, Matthew and Mehta, Vihang and Hathi, Nimish and Cohen, Seth and Windhorst, Rogier and Koekemoer, Anton M. and Teplitz, Harry I. and Haardt, Francesco and Siana, Brian},
month = may,
year = {2017},
keywords = {Astrophysics - Astrophysics of Galaxies},
pages = {arXiv:1705.06355},
}
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We combine archival HST broadband ultraviolet and optical imaging (F275W and F606W, respectively) with emission line catalogs derived from WFC3 IR G141 grism spectroscopy to search for escaping Lyman Continuum (LyC) emission from homogeneously selected \\$z{\\textbackslash}simeq\\$2.5 SFGs. We detect no escaping Lyman Continuum from SFGs selected on [OII] nebular emission (N=208) and, within a narrow redshift range, on [OIII]/[OII]. We measure 1\\${\\textbackslash}sigma\\$ upper limits to the LyC escape fraction relative to the non-ionizing UV continuum from [OII] emitters, \\$f_\\{esc\\}{\\textless}\\$5.6%, and strong [OIII]/[OII]\\${\\textgreater}\\$5 ELGs, \\$f_\\{esc\\}{\\textless}\\$14.0%. Our observations are not deep enough to detect \\$f_\\{esc\\}{\\textbackslash}lesssim\\$10% typical of the low redshift Lyman continuum emitters. However, we find that this population represents a small fraction of the star-forming galaxy population at \\$z{\\textbackslash}simeq\\$2. Thus, unless the number of extreme emission line galaxies grows substantially to z\\${\\textgreater}\\$6, such galaxies may be insufficient for reionization. Deeper survey data in the rest-frame ionizing UV will be necessary to determine whether strong line ratios could be useful for pre-selecting LyC leakers at high redshift.","urldate":"2017-05-25","journal":"ArXiv e-prints","author":[{"propositions":[],"lastnames":["Rutkowski"],"firstnames":["Michael","J."],"suffixes":[]},{"propositions":[],"lastnames":["Scarlata"],"firstnames":["Claudia"],"suffixes":[]},{"propositions":[],"lastnames":["Henry"],"firstnames":["Alaina"],"suffixes":[]},{"propositions":[],"lastnames":["Hayes"],"firstnames":["Matthew"],"suffixes":[]},{"propositions":[],"lastnames":["Mehta"],"firstnames":["Vihang"],"suffixes":[]},{"propositions":[],"lastnames":["Hathi"],"firstnames":["Nimish"],"suffixes":[]},{"propositions":[],"lastnames":["Cohen"],"firstnames":["Seth"],"suffixes":[]},{"propositions":[],"lastnames":["Windhorst"],"firstnames":["Rogier"],"suffixes":[]},{"propositions":[],"lastnames":["Koekemoer"],"firstnames":["Anton","M."],"suffixes":[]},{"propositions":[],"lastnames":["Teplitz"],"firstnames":["Harry","I."],"suffixes":[]},{"propositions":[],"lastnames":["Haardt"],"firstnames":["Francesco"],"suffixes":[]},{"propositions":[],"lastnames":["Siana"],"firstnames":["Brian"],"suffixes":[]}],"month":"May","year":"2017","keywords":"Astrophysics - Astrophysics of Galaxies","pages":"arXiv:1705.06355","bibtex":"@article{rutkowski_lyman_2017,\n\ttitle = {The {Lyman} {Continuum} escape fraction of emission line-selected \\$z{\\textbackslash}sim2.5\\$ galaxies is less than 15\\%},\n\tvolume = {1705},\n\turl = {http://adsabs.harvard.edu/abs/2017arXiv170506355R},\n\tabstract = {Recent work suggests that strong emission line, star-forming galaxies \nmay be significant Lyman Continuum leakers. We combine archival HST\nbroadband ultraviolet and optical imaging (F275W and F606W,\nrespectively) with emission line catalogs derived from WFC3 IR G141\ngrism spectroscopy to search for escaping Lyman Continuum (LyC) emission\nfrom homogeneously selected \\$z{\\textbackslash}simeq\\$2.5 SFGs. We detect no escaping\nLyman Continuum from SFGs selected on [OII] nebular emission (N=208)\nand, within a narrow redshift range, on [OIII]/[OII]. We measure\n1\\${\\textbackslash}sigma\\$ upper limits to the LyC escape fraction relative to the\nnon-ionizing UV continuum from [OII] emitters, \\$f\\_\\{esc\\}{\\textless}\\$5.6\\%, and\nstrong [OIII]/[OII]\\${\\textgreater}\\$5 ELGs, \\$f\\_\\{esc\\}{\\textless}\\$14.0\\%. Our observations\nare not deep enough to detect \\$f\\_\\{esc\\}{\\textbackslash}lesssim\\$10\\% typical of the low\nredshift Lyman continuum emitters. However, we find that this population\nrepresents a small fraction of the star-forming galaxy population at\n\\$z{\\textbackslash}simeq\\$2. Thus, unless the number of extreme emission line galaxies\ngrows substantially to z\\${\\textgreater}\\$6, such galaxies may be insufficient for\nreionization. Deeper survey data in the rest-frame ionizing UV will be\nnecessary to determine whether strong line ratios could be useful for\npre-selecting LyC leakers at high redshift.},\n\turldate = {2017-05-25},\n\tjournal = {ArXiv e-prints},\n\tauthor = {Rutkowski, Michael J. and Scarlata, Claudia and Henry, Alaina and Hayes, Matthew and Mehta, Vihang and Hathi, Nimish and Cohen, Seth and Windhorst, Rogier and Koekemoer, Anton M. and Teplitz, Harry I. and Haardt, Francesco and Siana, Brian},\n\tmonth = may,\n\tyear = {2017},\n\tkeywords = {Astrophysics - Astrophysics of Galaxies},\n\tpages = {arXiv:1705.06355},\n}\n\n","author_short":["Rutkowski, M. 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