Direct evidence for Ly\${\textbackslash}alpha\$ depletion in the protocluster core. Shimakawa, R., Kodama, T., Hayashi, M., Tanaka, I., Matsuda, Y., Kashikawa, N., Shibuya, T., Tadaki, K., Koyama, Y., Suzuki, T. L., & Yamamoto, M. Monthly Notices of the Royal Astronomical Society: Letters, 468(1):L21–L25, June, 2017. arXiv: 1702.00100![Direct evidence for Ly\${\textbackslash}alpha\$ depletion in the protocluster core [link]](https://bibbase.org/img/filetypes/link.svg "link")
Paper doi abstract bibtex We have carried out a panoramic Ly\${\textbackslash}alpha\$ narrowband imaging with Suprime-Cam on Subaru towards the known protocluster USS1558–003 at \$z=2.53\$. Our previous narrowband imaging at near-infrared has identified multiple dense groups of H\${\textbackslash}alpha\$ emitters (HAEs) within the protocluster. We have now identified the large-scale structures across a \${\textbackslash}sim\$50 comoving Mpc scale traced by Ly\${\textbackslash}alpha\$ emitters (LAEs) in which the protocluster traced by the HAEs is embedded. On a smaller scale, however, there are remarkably few LAEs in the regions of HAE overdensities. Moreover, the stacking analyses of the images show that HAEs in higher-density regions show systematically lower escape fractions of Ly\${\textbackslash}alpha\$ photons than those of HAEs in lower-density regions. These phenomena may be driven by the extra depletion of Ly\${\textbackslash}alpha\$ emission lines along our line of sight by more intervening cold circumgalactic/intergalactic medium and/or dust existing in the dense core. We also caution that all the past high-\$z\$ protocluster surveys using LAEs as the tracers would have largely missed galaxies in the very dense cores of the protoclusters where we would expect to see any early environmental effects.
@article{shimakawa_direct_2017,
title = {Direct evidence for {Ly}\${\textbackslash}alpha\$ depletion in the protocluster core},
volume = {468},
issn = {1745-3925, 1745-3933},
url = {http://arxiv.org/abs/1702.00100},
doi = {10.1093/mnrasl/slx019},
abstract = {We have carried out a panoramic Ly\${\textbackslash}alpha\$ narrowband imaging with Suprime-Cam on Subaru towards the known protocluster USS1558--003 at \$z=2.53\$. Our previous narrowband imaging at near-infrared has identified multiple dense groups of H\${\textbackslash}alpha\$ emitters (HAEs) within the protocluster. We have now identified the large-scale structures across a \${\textbackslash}sim\$50 comoving Mpc scale traced by Ly\${\textbackslash}alpha\$ emitters (LAEs) in which the protocluster traced by the HAEs is embedded. On a smaller scale, however, there are remarkably few LAEs in the regions of HAE overdensities. Moreover, the stacking analyses of the images show that HAEs in higher-density regions show systematically lower escape fractions of Ly\${\textbackslash}alpha\$ photons than those of HAEs in lower-density regions. These phenomena may be driven by the extra depletion of Ly\${\textbackslash}alpha\$ emission lines along our line of sight by more intervening cold circumgalactic/intergalactic medium and/or dust existing in the dense core. We also caution that all the past high-\$z\$ protocluster surveys using LAEs as the tracers would have largely missed galaxies in the very dense cores of the protoclusters where we would expect to see any early environmental effects.},
number = {1},
journal = {Monthly Notices of the Royal Astronomical Society: Letters},
author = {Shimakawa, Rhythm and Kodama, Tadayuki and Hayashi, Masao and Tanaka, Ichi and Matsuda, Yuichi and Kashikawa, Nobunari and Shibuya, Takatoshi and Tadaki, Ken-ichi and Koyama, Yusei and Suzuki, Tomoko L. and Yamamoto, Moegi},
month = jun,
year = {2017},
note = {arXiv: 1702.00100},
keywords = {Astrophysics - Astrophysics of Galaxies},
pages = {L21--L25},
}
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We have now identified the large-scale structures across a \\${\\textbackslash}sim\\$50 comoving Mpc scale traced by Ly\\${\\textbackslash}alpha\\$ emitters (LAEs) in which the protocluster traced by the HAEs is embedded. On a smaller scale, however, there are remarkably few LAEs in the regions of HAE overdensities. Moreover, the stacking analyses of the images show that HAEs in higher-density regions show systematically lower escape fractions of Ly\\${\\textbackslash}alpha\\$ photons than those of HAEs in lower-density regions. These phenomena may be driven by the extra depletion of Ly\\${\\textbackslash}alpha\\$ emission lines along our line of sight by more intervening cold circumgalactic/intergalactic medium and/or dust existing in the dense core. We also caution that all the past high-\\$z\\$ protocluster surveys using LAEs as the tracers would have largely missed galaxies in the very dense cores of the protoclusters where we would expect to see any early environmental effects.","number":"1","journal":"Monthly Notices of the Royal Astronomical Society: Letters","author":[{"propositions":[],"lastnames":["Shimakawa"],"firstnames":["Rhythm"],"suffixes":[]},{"propositions":[],"lastnames":["Kodama"],"firstnames":["Tadayuki"],"suffixes":[]},{"propositions":[],"lastnames":["Hayashi"],"firstnames":["Masao"],"suffixes":[]},{"propositions":[],"lastnames":["Tanaka"],"firstnames":["Ichi"],"suffixes":[]},{"propositions":[],"lastnames":["Matsuda"],"firstnames":["Yuichi"],"suffixes":[]},{"propositions":[],"lastnames":["Kashikawa"],"firstnames":["Nobunari"],"suffixes":[]},{"propositions":[],"lastnames":["Shibuya"],"firstnames":["Takatoshi"],"suffixes":[]},{"propositions":[],"lastnames":["Tadaki"],"firstnames":["Ken-ichi"],"suffixes":[]},{"propositions":[],"lastnames":["Koyama"],"firstnames":["Yusei"],"suffixes":[]},{"propositions":[],"lastnames":["Suzuki"],"firstnames":["Tomoko","L."],"suffixes":[]},{"propositions":[],"lastnames":["Yamamoto"],"firstnames":["Moegi"],"suffixes":[]}],"month":"June","year":"2017","note":"arXiv: 1702.00100","keywords":"Astrophysics - Astrophysics of Galaxies","pages":"L21–L25","bibtex":"@article{shimakawa_direct_2017,\n\ttitle = {Direct evidence for {Ly}\\${\\textbackslash}alpha\\$ depletion in the protocluster core},\n\tvolume = {468},\n\tissn = {1745-3925, 1745-3933},\n\turl = {http://arxiv.org/abs/1702.00100},\n\tdoi = {10.1093/mnrasl/slx019},\n\tabstract = {We have carried out a panoramic Ly\\${\\textbackslash}alpha\\$ narrowband imaging with Suprime-Cam on Subaru towards the known protocluster USS1558--003 at \\$z=2.53\\$. Our previous narrowband imaging at near-infrared has identified multiple dense groups of H\\${\\textbackslash}alpha\\$ emitters (HAEs) within the protocluster. We have now identified the large-scale structures across a \\${\\textbackslash}sim\\$50 comoving Mpc scale traced by Ly\\${\\textbackslash}alpha\\$ emitters (LAEs) in which the protocluster traced by the HAEs is embedded. On a smaller scale, however, there are remarkably few LAEs in the regions of HAE overdensities. Moreover, the stacking analyses of the images show that HAEs in higher-density regions show systematically lower escape fractions of Ly\\${\\textbackslash}alpha\\$ photons than those of HAEs in lower-density regions. These phenomena may be driven by the extra depletion of Ly\\${\\textbackslash}alpha\\$ emission lines along our line of sight by more intervening cold circumgalactic/intergalactic medium and/or dust existing in the dense core. We also caution that all the past high-\\$z\\$ protocluster surveys using LAEs as the tracers would have largely missed galaxies in the very dense cores of the protoclusters where we would expect to see any early environmental effects.},\n\tnumber = {1},\n\tjournal = {Monthly Notices of the Royal Astronomical Society: Letters},\n\tauthor = {Shimakawa, Rhythm and Kodama, Tadayuki and Hayashi, Masao and Tanaka, Ichi and Matsuda, Yuichi and Kashikawa, Nobunari and Shibuya, Takatoshi and Tadaki, Ken-ichi and Koyama, Yusei and Suzuki, Tomoko L. and Yamamoto, Moegi},\n\tmonth = jun,\n\tyear = {2017},\n\tnote = {arXiv: 1702.00100},\n\tkeywords = {Astrophysics - Astrophysics of Galaxies},\n\tpages = {L21--L25},\n}\n\n","author_short":["Shimakawa, R.","Kodama, T.","Hayashi, M.","Tanaka, I.","Matsuda, Y.","Kashikawa, N.","Shibuya, T.","Tadaki, K.","Koyama, Y.","Suzuki, T. 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