A Radio-to-mm Census of Star-forming Galaxies in Protocluster 4C23.56 at Z = 2.5: Gas Mass and Its Fraction Revealed with ALMA. Lee, M. M., Tanaka, I., Kawabe, R., Kohno, K., Kodama, T., Kajisawa, M., Yun, M. S., Nakanishi, K., Iono, D., Tamura, Y., Hatsukade, B., Umehata, H., Saito, T., Izumi, T., Aretxaga, I., Tadaki, K., Zeballos, M., Ikarashi, S., Wilson, G. W., Hughes, D. H., & Ivison, R. J. The Astrophysical Journal, 842(1):55, June, 2017. ![A Radio-to-mm Census of Star-forming Galaxies in Protocluster 4C23.56 at Z = 2.5: Gas Mass and Its Fraction Revealed with ALMA [link]](https://bibbase.org/img/filetypes/link.svg "link")
Paper doi abstract bibtex We investigate gas contents of star-forming galaxies associated with protocluster 4C23.56 at z = 2.49 by using the redshifted CO (3-2) and 1.1 mm dust continuum with the Atacama Large Millimeter/submillimeter Array. The observations unveil seven CO detections out of 22 targeted Hα emitters (HAEs) and four out of 19 in 1.1 mm dust continuum. They have high stellar mass (\M\\textlessSUB\textgreater\textbackslashstar \textless/SUB\textgreater> 4× \10\\textlessSUP\textgreater10\textless/SUP\textgreater M \textlessSUB\textgreater☉\textless/SUB\textgreater) and exhibit a specific star-formation rate typical of main-sequence star-forming galaxies at z̃ 2.5. Different gas-mass estimators from CO (3-2) and 1.1 mm yield consistent values for simultaneous detections. The gas mass (\M\\textlessSUB\textgreater\gas\textless/SUB\textgreater\) and gas fraction (\f\\textlessSUB\textgreater\gas\textless/SUB\textgreater\) are comparable to those of field galaxies, with \M\\textlessSUB\textgreater\gas\textless/SUB\textgreater\=[0.3,1.8]× \10\\textlessSUP\textgreater11\textless/SUP\textgreater× (\α \\textlessSUB\textgreater\CO\textless/SUB\textgreater\/(4.36× A(Z))) \M\\textlessSUB\textgreater☉ \textless/SUB\textgreater, where \α \\textlessSUB\textgreater\CO\textless/SUB\textgreater\ is the CO-to-H\textlessSUB\textgreater2\textless/SUB\textgreater conversion factor and A(Z) is the additional correction factor for the metallicity dependence of \α \\textlessSUB\textgreater\CO\textless/SUB\textgreater\, and < \f\\textlessSUB\textgreater\gas\textless/SUB\textgreater\> =0.53+/- 0.07 from CO (3-2). Our measurements place a constraint on the cosmic gas density of high-z protoclusters, indicating that the protocluster is characterized by a gas density higher than that of the general fields by an order of magnitude. We found ρ (\H\\textlessSUB\textgreater2\textless/SUB\textgreater)̃ 5× \10\\textlessSUP\textgreater9\textless/SUP\textgreater \M\\textlessSUB\textgreater☉ \textless/SUB\textgreater \\Mpc\\\textlessSUP\textgreater-3\textless/SUP\textgreater with the CO(3-2) detections. The five ALMA CO detections occur in the region of highest galaxy surface density, where the density positively correlates with global star-forming efficiency (SFE) and stellar mass. Such correlations possibly indicate a critical role of the environment on early galaxy evolution at high-z protoclusters, though future observations are necessary for confirmation.
@article{lee_radio--mm_2017,
title = {A {Radio}-to-mm {Census} of {Star}-forming {Galaxies} in {Protocluster} {4C23}.56 at {Z} = 2.5: {Gas} {Mass} and {Its} {Fraction} {Revealed} with {ALMA}},
volume = {842},
shorttitle = {A {Radio}-to-mm {Census} of {Star}-forming {Galaxies} in {Protocluster} {4C23}.56 at {Z} = 2.5},
url = {https://ui.adsabs.harvard.edu/abs/2017ApJ...842...55L/abstract},
doi = {10.3847/1538-4357/aa74c2},
abstract = {We investigate gas contents of star-forming galaxies associated with protocluster 4C23.56 at z = 2.49 by using the redshifted CO (3-2) and 1.1 mm dust continuum with the Atacama Large Millimeter/submillimeter Array. The observations unveil seven CO detections out of 22 targeted Hα emitters (HAEs) and four out of 19 in 1.1 mm dust continuum. They have high stellar mass (\{M\}{\textless}SUB{\textgreater}{\textbackslash}star {\textless}/SUB{\textgreater}\> 4× \{10\}{\textless}SUP{\textgreater}10{\textless}/SUP{\textgreater} M {\textless}SUB{\textgreater}☉{\textless}/SUB{\textgreater}) and exhibit a specific star-formation rate typical of main-sequence star-forming galaxies at z̃ 2.5. Different gas-mass estimators from CO (3-2) and 1.1 mm yield consistent values for simultaneous detections. The gas mass (\{M\}{\textless}SUB{\textgreater}\{gas{\textless}/SUB{\textgreater}\}) and gas fraction (\{f\}{\textless}SUB{\textgreater}\{gas{\textless}/SUB{\textgreater}\}) are comparable to those of field galaxies, with \{M\}{\textless}SUB{\textgreater}\{gas{\textless}/SUB{\textgreater}\}=[0.3,1.8]× \{10\}{\textless}SUP{\textgreater}11{\textless}/SUP{\textgreater}× (\{α \}{\textless}SUB{\textgreater}\{CO{\textless}/SUB{\textgreater}\}/(4.36× A(Z))) \{M\}{\textless}SUB{\textgreater}☉ {\textless}/SUB{\textgreater}, where \{α \}{\textless}SUB{\textgreater}\{CO{\textless}/SUB{\textgreater}\} is the CO-to-H{\textless}SUB{\textgreater}2{\textless}/SUB{\textgreater} conversion factor and A(Z) is the additional correction factor for the metallicity dependence of \{α \}{\textless}SUB{\textgreater}\{CO{\textless}/SUB{\textgreater}\}, and \< \{f\}{\textless}SUB{\textgreater}\{gas{\textless}/SUB{\textgreater}\}\> =0.53+/- 0.07 from CO (3-2). Our measurements place a constraint on the cosmic gas density of high-z protoclusters, indicating that the protocluster is characterized by a gas density higher than that of the general fields by an order of magnitude. We found ρ (\{H\}{\textless}SUB{\textgreater}2{\textless}/SUB{\textgreater})̃ 5× \{10\}{\textless}SUP{\textgreater}9{\textless}/SUP{\textgreater} \{M\}{\textless}SUB{\textgreater}☉ {\textless}/SUB{\textgreater} \{\{Mpc\}\}{\textless}SUP{\textgreater}-3{\textless}/SUP{\textgreater} with the CO(3-2) detections. The five ALMA CO detections occur in the region of highest galaxy surface density, where the density positively correlates with global star-forming efficiency (SFE) and stellar mass. Such correlations possibly indicate a critical role of the environment on early galaxy evolution at high-z protoclusters, though future observations are necessary for confirmation.},
language = {en},
number = {1},
urldate = {2019-05-28},
journal = {The Astrophysical Journal},
author = {Lee, Minju M. and Tanaka, Ichi and Kawabe, Ryohei and Kohno, Kotaro and Kodama, Tadayuki and Kajisawa, Masaru and Yun, Min S. and Nakanishi, Kouichiro and Iono, Daisuke and Tamura, Yoichi and Hatsukade, Bunyo and Umehata, Hideki and Saito, Toshiki and Izumi, Takuma and Aretxaga, Itziar and Tadaki, Ken-ichi and Zeballos, Milagros and Ikarashi, Soh and Wilson, Grant W. and Hughes, David H. and Ivison, R. J.},
month = jun,
year = {2017},
keywords = {Astrophysics - Astrophysics of Galaxies},
pages = {55},
}
Downloads: 0
{"_id":"4Lv8ckmguZKM3NHuF","bibbaseid":"lee-tanaka-kawabe-kohno-kodama-kajisawa-yun-nakanishi-etal-aradiotommcensusofstarforminggalaxiesinprotocluster4c2356atz25gasmassanditsfractionrevealedwithalma-2017","author_short":["Lee, M. M.","Tanaka, I.","Kawabe, R.","Kohno, K.","Kodama, T.","Kajisawa, M.","Yun, M. S.","Nakanishi, K.","Iono, D.","Tamura, Y.","Hatsukade, B.","Umehata, H.","Saito, T.","Izumi, T.","Aretxaga, I.","Tadaki, K.","Zeballos, M.","Ikarashi, S.","Wilson, G. W.","Hughes, D. H.","Ivison, R. J."],"bibdata":{"bibtype":"article","type":"article","title":"A Radio-to-mm Census of Star-forming Galaxies in Protocluster 4C23.56 at Z = 2.5: Gas Mass and Its Fraction Revealed with ALMA","volume":"842","shorttitle":"A Radio-to-mm Census of Star-forming Galaxies in Protocluster 4C23.56 at Z = 2.5","url":"https://ui.adsabs.harvard.edu/abs/2017ApJ...842...55L/abstract","doi":"10.3847/1538-4357/aa74c2","abstract":"We investigate gas contents of star-forming galaxies associated with protocluster 4C23.56 at z = 2.49 by using the redshifted CO (3-2) and 1.1 mm dust continuum with the Atacama Large Millimeter/submillimeter Array. The observations unveil seven CO detections out of 22 targeted Hα emitters (HAEs) and four out of 19 in 1.1 mm dust continuum. They have high stellar mass (\\M\\\\textlessSUB\\textgreater\\textbackslashstar \\textless/SUB\\textgreater> 4× \\10\\\\textlessSUP\\textgreater10\\textless/SUP\\textgreater M \\textlessSUB\\textgreater☉\\textless/SUB\\textgreater) and exhibit a specific star-formation rate typical of main-sequence star-forming galaxies at z̃ 2.5. Different gas-mass estimators from CO (3-2) and 1.1 mm yield consistent values for simultaneous detections. The gas mass (\\M\\\\textlessSUB\\textgreater\\gas\\textless/SUB\\textgreater\\) and gas fraction (\\f\\\\textlessSUB\\textgreater\\gas\\textless/SUB\\textgreater\\) are comparable to those of field galaxies, with \\M\\\\textlessSUB\\textgreater\\gas\\textless/SUB\\textgreater\\=[0.3,1.8]× \\10\\\\textlessSUP\\textgreater11\\textless/SUP\\textgreater× (\\α \\\\textlessSUB\\textgreater\\CO\\textless/SUB\\textgreater\\/(4.36× A(Z))) \\M\\\\textlessSUB\\textgreater☉ \\textless/SUB\\textgreater, where \\α \\\\textlessSUB\\textgreater\\CO\\textless/SUB\\textgreater\\ is the CO-to-H\\textlessSUB\\textgreater2\\textless/SUB\\textgreater conversion factor and A(Z) is the additional correction factor for the metallicity dependence of \\α \\\\textlessSUB\\textgreater\\CO\\textless/SUB\\textgreater\\, and < \\f\\\\textlessSUB\\textgreater\\gas\\textless/SUB\\textgreater\\> =0.53+/- 0.07 from CO (3-2). Our measurements place a constraint on the cosmic gas density of high-z protoclusters, indicating that the protocluster is characterized by a gas density higher than that of the general fields by an order of magnitude. We found ρ (\\H\\\\textlessSUB\\textgreater2\\textless/SUB\\textgreater)̃ 5× \\10\\\\textlessSUP\\textgreater9\\textless/SUP\\textgreater \\M\\\\textlessSUB\\textgreater☉ \\textless/SUB\\textgreater \\\\Mpc\\\\\\textlessSUP\\textgreater-3\\textless/SUP\\textgreater with the CO(3-2) detections. The five ALMA CO detections occur in the region of highest galaxy surface density, where the density positively correlates with global star-forming efficiency (SFE) and stellar mass. Such correlations possibly indicate a critical role of the environment on early galaxy evolution at high-z protoclusters, though future observations are necessary for confirmation.","language":"en","number":"1","urldate":"2019-05-28","journal":"The Astrophysical Journal","author":[{"propositions":[],"lastnames":["Lee"],"firstnames":["Minju","M."],"suffixes":[]},{"propositions":[],"lastnames":["Tanaka"],"firstnames":["Ichi"],"suffixes":[]},{"propositions":[],"lastnames":["Kawabe"],"firstnames":["Ryohei"],"suffixes":[]},{"propositions":[],"lastnames":["Kohno"],"firstnames":["Kotaro"],"suffixes":[]},{"propositions":[],"lastnames":["Kodama"],"firstnames":["Tadayuki"],"suffixes":[]},{"propositions":[],"lastnames":["Kajisawa"],"firstnames":["Masaru"],"suffixes":[]},{"propositions":[],"lastnames":["Yun"],"firstnames":["Min","S."],"suffixes":[]},{"propositions":[],"lastnames":["Nakanishi"],"firstnames":["Kouichiro"],"suffixes":[]},{"propositions":[],"lastnames":["Iono"],"firstnames":["Daisuke"],"suffixes":[]},{"propositions":[],"lastnames":["Tamura"],"firstnames":["Yoichi"],"suffixes":[]},{"propositions":[],"lastnames":["Hatsukade"],"firstnames":["Bunyo"],"suffixes":[]},{"propositions":[],"lastnames":["Umehata"],"firstnames":["Hideki"],"suffixes":[]},{"propositions":[],"lastnames":["Saito"],"firstnames":["Toshiki"],"suffixes":[]},{"propositions":[],"lastnames":["Izumi"],"firstnames":["Takuma"],"suffixes":[]},{"propositions":[],"lastnames":["Aretxaga"],"firstnames":["Itziar"],"suffixes":[]},{"propositions":[],"lastnames":["Tadaki"],"firstnames":["Ken-ichi"],"suffixes":[]},{"propositions":[],"lastnames":["Zeballos"],"firstnames":["Milagros"],"suffixes":[]},{"propositions":[],"lastnames":["Ikarashi"],"firstnames":["Soh"],"suffixes":[]},{"propositions":[],"lastnames":["Wilson"],"firstnames":["Grant","W."],"suffixes":[]},{"propositions":[],"lastnames":["Hughes"],"firstnames":["David","H."],"suffixes":[]},{"propositions":[],"lastnames":["Ivison"],"firstnames":["R.","J."],"suffixes":[]}],"month":"June","year":"2017","keywords":"Astrophysics - Astrophysics of Galaxies","pages":"55","bibtex":"@article{lee_radio--mm_2017,\n\ttitle = {A {Radio}-to-mm {Census} of {Star}-forming {Galaxies} in {Protocluster} {4C23}.56 at {Z} = 2.5: {Gas} {Mass} and {Its} {Fraction} {Revealed} with {ALMA}},\n\tvolume = {842},\n\tshorttitle = {A {Radio}-to-mm {Census} of {Star}-forming {Galaxies} in {Protocluster} {4C23}.56 at {Z} = 2.5},\n\turl = {https://ui.adsabs.harvard.edu/abs/2017ApJ...842...55L/abstract},\n\tdoi = {10.3847/1538-4357/aa74c2},\n\tabstract = {We investigate gas contents of star-forming galaxies associated with protocluster 4C23.56 at z = 2.49 by using the redshifted CO (3-2) and 1.1 mm dust continuum with the Atacama Large Millimeter/submillimeter Array. The observations unveil seven CO detections out of 22 targeted Hα emitters (HAEs) and four out of 19 in 1.1 mm dust continuum. They have high stellar mass (\\{M\\}{\\textless}SUB{\\textgreater}{\\textbackslash}star {\\textless}/SUB{\\textgreater}\\> 4× \\{10\\}{\\textless}SUP{\\textgreater}10{\\textless}/SUP{\\textgreater} M {\\textless}SUB{\\textgreater}☉{\\textless}/SUB{\\textgreater}) and exhibit a specific star-formation rate typical of main-sequence star-forming galaxies at z̃ 2.5. Different gas-mass estimators from CO (3-2) and 1.1 mm yield consistent values for simultaneous detections. The gas mass (\\{M\\}{\\textless}SUB{\\textgreater}\\{gas{\\textless}/SUB{\\textgreater}\\}) and gas fraction (\\{f\\}{\\textless}SUB{\\textgreater}\\{gas{\\textless}/SUB{\\textgreater}\\}) are comparable to those of field galaxies, with \\{M\\}{\\textless}SUB{\\textgreater}\\{gas{\\textless}/SUB{\\textgreater}\\}=[0.3,1.8]× \\{10\\}{\\textless}SUP{\\textgreater}11{\\textless}/SUP{\\textgreater}× (\\{α \\}{\\textless}SUB{\\textgreater}\\{CO{\\textless}/SUB{\\textgreater}\\}/(4.36× A(Z))) \\{M\\}{\\textless}SUB{\\textgreater}☉ {\\textless}/SUB{\\textgreater}, where \\{α \\}{\\textless}SUB{\\textgreater}\\{CO{\\textless}/SUB{\\textgreater}\\} is the CO-to-H{\\textless}SUB{\\textgreater}2{\\textless}/SUB{\\textgreater} conversion factor and A(Z) is the additional correction factor for the metallicity dependence of \\{α \\}{\\textless}SUB{\\textgreater}\\{CO{\\textless}/SUB{\\textgreater}\\}, and \\< \\{f\\}{\\textless}SUB{\\textgreater}\\{gas{\\textless}/SUB{\\textgreater}\\}\\> =0.53+/- 0.07 from CO (3-2). Our measurements place a constraint on the cosmic gas density of high-z protoclusters, indicating that the protocluster is characterized by a gas density higher than that of the general fields by an order of magnitude. We found ρ (\\{H\\}{\\textless}SUB{\\textgreater}2{\\textless}/SUB{\\textgreater})̃ 5× \\{10\\}{\\textless}SUP{\\textgreater}9{\\textless}/SUP{\\textgreater} \\{M\\}{\\textless}SUB{\\textgreater}☉ {\\textless}/SUB{\\textgreater} \\{\\{Mpc\\}\\}{\\textless}SUP{\\textgreater}-3{\\textless}/SUP{\\textgreater} with the CO(3-2) detections. The five ALMA CO detections occur in the region of highest galaxy surface density, where the density positively correlates with global star-forming efficiency (SFE) and stellar mass. Such correlations possibly indicate a critical role of the environment on early galaxy evolution at high-z protoclusters, though future observations are necessary for confirmation.},\n\tlanguage = {en},\n\tnumber = {1},\n\turldate = {2019-05-28},\n\tjournal = {The Astrophysical Journal},\n\tauthor = {Lee, Minju M. and Tanaka, Ichi and Kawabe, Ryohei and Kohno, Kotaro and Kodama, Tadayuki and Kajisawa, Masaru and Yun, Min S. and Nakanishi, Kouichiro and Iono, Daisuke and Tamura, Yoichi and Hatsukade, Bunyo and Umehata, Hideki and Saito, Toshiki and Izumi, Takuma and Aretxaga, Itziar and Tadaki, Ken-ichi and Zeballos, Milagros and Ikarashi, Soh and Wilson, Grant W. and Hughes, David H. and Ivison, R. J.},\n\tmonth = jun,\n\tyear = {2017},\n\tkeywords = {Astrophysics - Astrophysics of Galaxies},\n\tpages = {55},\n}\n\n","author_short":["Lee, M. M.","Tanaka, I.","Kawabe, R.","Kohno, K.","Kodama, T.","Kajisawa, M.","Yun, M. S.","Nakanishi, K.","Iono, D.","Tamura, Y.","Hatsukade, B.","Umehata, H.","Saito, T.","Izumi, T.","Aretxaga, I.","Tadaki, K.","Zeballos, M.","Ikarashi, S.","Wilson, G. W.","Hughes, D. H.","Ivison, R. J."],"key":"lee_radio--mm_2017","id":"lee_radio--mm_2017","bibbaseid":"lee-tanaka-kawabe-kohno-kodama-kajisawa-yun-nakanishi-etal-aradiotommcensusofstarforminggalaxiesinprotocluster4c2356atz25gasmassanditsfractionrevealedwithalma-2017","role":"author","urls":{"Paper":"https://ui.adsabs.harvard.edu/abs/2017ApJ...842...55L/abstract"},"keyword":["Astrophysics - Astrophysics of Galaxies"],"metadata":{"authorlinks":{}}},"bibtype":"article","biburl":"https://bibbase.org/zotero/polyphant","dataSources":["7gvjSdWrEu7z5vjjj"],"keywords":["astrophysics - astrophysics of galaxies"],"search_terms":["radio","census","star","forming","galaxies","protocluster","4c23","gas","mass","fraction","revealed","alma","lee","tanaka","kawabe","kohno","kodama","kajisawa","yun","nakanishi","iono","tamura","hatsukade","umehata","saito","izumi","aretxaga","tadaki","zeballos","ikarashi","wilson","hughes","ivison"],"title":"A Radio-to-mm Census of Star-forming Galaxies in Protocluster 4C23.56 at Z = 2.5: Gas Mass and Its Fraction Revealed with ALMA","year":2017}