IR SED and Dust Masses of Sub-solar Metallicity Galaxies at z\textasciitilde2.3. Shivaei, I., Popping, G., Rieke, G., Reddy, N., Pope, A., Kennicutt, R., Mobasher, B., Coil, A., Fudamoto, Y., Kriek, M., Lyu, J., Oesch, P., Sanders, R., Shapley, A., & Siana, B. arXiv:2201.04270 [astro-ph], January, 2022. arXiv: 2201.04270![IR SED and Dust Masses of Sub-solar Metallicity Galaxies at z\textasciitilde2.3 [link]](https://bibbase.org/img/filetypes/link.svg "link")
Paper abstract bibtex We present results from ALMA 1.2mm continuum observations of a sample of 27 star-forming galaxies at z=2.1-2.5 from the MOSFIRE Deep Evolution Field (MOSDEF) survey. These galaxies have gas-phase metallicity and star-formation rate measurements from Hb, [OIII], Ha, and [NII]. Using stacks of Spitzer, Herschel, and ALMA photometry (rest-frame \textasciitilde 8-400\${\textbackslash}mu\$m), we examine the IR SED of high-redshift subsolar metallicity (\textasciitilde0.5 \$Z_\{{\textbackslash}odot\}\$) LIRGs. We find that the data agree well with an average SED template of higher luminosity local low-metallicity dwarf galaxies (reduced \${\textbackslash}chi{\textasciicircum}2\$ of 1.8). When compared with the commonly used templates for solar-metallicity local galaxies or high-redshift LIRGs and ULIRGs, even in the most favorable case (with reduced \${\textbackslash}chi{\textasciicircum}2\$ of 2.8), the templates are rejected at \textgreater98% confidence level. The broader and hotter IR SED of both the local dwarfs and high-redshift subsolar metallicity galaxies may result from different grain properties, a clumpy dust geometry, or a harder/more intense ionizing radiation field that heats the dust to higher temperatures. The obscured SFR indicated by the FIR emission of the subsolar metallicity galaxies is only \textasciitilde 60% of the total SFR, which is considerably lower than that of the local LIRGs with \textasciitilde 96-97% obscured fractions. Due to the evolving IR SED shape, the local LIRG templates fit to mid-IR data can overestimate the Rayleigh-Jeans tail measurements at z\textasciitilde2 by a factor of 2-20, and these templates underestimate IR luminosities if fit to the observed ALMA fluxes by \textgreater0.4dex. At a given stellar mass or metallicity, dust masses at z\textasciitilde2.3 are an order of magnitude higher than those at z\textasciitilde0. Given the predicted molecular gas mass fractions, the observed z\textasciitilde2.3 dust-to-stellar mass ratios suggest lower dust-to-molecular gas masses than in local galaxies at the same metallicity.
@article{shivaei_ir_2022,
title = {{IR} {SED} and {Dust} {Masses} of {Sub}-solar {Metallicity} {Galaxies} at z{\textasciitilde}2.3},
url = {http://arxiv.org/abs/2201.04270},
abstract = {We present results from ALMA 1.2mm continuum observations of a sample of 27 star-forming galaxies at z=2.1-2.5 from the MOSFIRE Deep Evolution Field (MOSDEF) survey. These galaxies have gas-phase metallicity and star-formation rate measurements from Hb, [OIII], Ha, and [NII]. Using stacks of Spitzer, Herschel, and ALMA photometry (rest-frame {\textasciitilde} 8-400\${\textbackslash}mu\$m), we examine the IR SED of high-redshift subsolar metallicity ({\textasciitilde}0.5 \$Z\_\{{\textbackslash}odot\}\$) LIRGs. We find that the data agree well with an average SED template of higher luminosity local low-metallicity dwarf galaxies (reduced \${\textbackslash}chi{\textasciicircum}2\$ of 1.8). When compared with the commonly used templates for solar-metallicity local galaxies or high-redshift LIRGs and ULIRGs, even in the most favorable case (with reduced \${\textbackslash}chi{\textasciicircum}2\$ of 2.8), the templates are rejected at {\textgreater}98\% confidence level. The broader and hotter IR SED of both the local dwarfs and high-redshift subsolar metallicity galaxies may result from different grain properties, a clumpy dust geometry, or a harder/more intense ionizing radiation field that heats the dust to higher temperatures. The obscured SFR indicated by the FIR emission of the subsolar metallicity galaxies is only {\textasciitilde} 60\% of the total SFR, which is considerably lower than that of the local LIRGs with {\textasciitilde} 96-97\% obscured fractions. Due to the evolving IR SED shape, the local LIRG templates fit to mid-IR data can overestimate the Rayleigh-Jeans tail measurements at z{\textasciitilde}2 by a factor of 2-20, and these templates underestimate IR luminosities if fit to the observed ALMA fluxes by {\textgreater}0.4dex. At a given stellar mass or metallicity, dust masses at z{\textasciitilde}2.3 are an order of magnitude higher than those at z{\textasciitilde}0. Given the predicted molecular gas mass fractions, the observed z{\textasciitilde}2.3 dust-to-stellar mass ratios suggest lower dust-to-molecular gas masses than in local galaxies at the same metallicity.},
urldate = {2022-01-13},
journal = {arXiv:2201.04270 [astro-ph]},
author = {Shivaei, Irene and Popping, Gergö and Rieke, George and Reddy, Naveen and Pope, Alexandra and Kennicutt, Robert and Mobasher, Bahram and Coil, Alison and Fudamoto, Yoshinobu and Kriek, Mariska and Lyu, Jianwei and Oesch, Pascal and Sanders, Ryan and Shapley, Alice and Siana, Brian},
month = jan,
year = {2022},
note = {arXiv: 2201.04270},
keywords = {Astrophysics - Astrophysics of Galaxies},
}
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Using stacks of Spitzer, Herschel, and ALMA photometry (rest-frame \\textasciitilde 8-400\\${\\textbackslash}mu\\$m), we examine the IR SED of high-redshift subsolar metallicity (\\textasciitilde0.5 \\$Z_\\{{\\textbackslash}odot\\}\\$) LIRGs. We find that the data agree well with an average SED template of higher luminosity local low-metallicity dwarf galaxies (reduced \\${\\textbackslash}chi{\\textasciicircum}2\\$ of 1.8). When compared with the commonly used templates for solar-metallicity local galaxies or high-redshift LIRGs and ULIRGs, even in the most favorable case (with reduced \\${\\textbackslash}chi{\\textasciicircum}2\\$ of 2.8), the templates are rejected at \\textgreater98% confidence level. The broader and hotter IR SED of both the local dwarfs and high-redshift subsolar metallicity galaxies may result from different grain properties, a clumpy dust geometry, or a harder/more intense ionizing radiation field that heats the dust to higher temperatures. The obscured SFR indicated by the FIR emission of the subsolar metallicity galaxies is only \\textasciitilde 60% of the total SFR, which is considerably lower than that of the local LIRGs with \\textasciitilde 96-97% obscured fractions. Due to the evolving IR SED shape, the local LIRG templates fit to mid-IR data can overestimate the Rayleigh-Jeans tail measurements at z\\textasciitilde2 by a factor of 2-20, and these templates underestimate IR luminosities if fit to the observed ALMA fluxes by \\textgreater0.4dex. At a given stellar mass or metallicity, dust masses at z\\textasciitilde2.3 are an order of magnitude higher than those at z\\textasciitilde0. Given the predicted molecular gas mass fractions, the observed z\\textasciitilde2.3 dust-to-stellar mass ratios suggest lower dust-to-molecular gas masses than in local galaxies at the same metallicity.","urldate":"2022-01-13","journal":"arXiv:2201.04270 [astro-ph]","author":[{"propositions":[],"lastnames":["Shivaei"],"firstnames":["Irene"],"suffixes":[]},{"propositions":[],"lastnames":["Popping"],"firstnames":["Gergö"],"suffixes":[]},{"propositions":[],"lastnames":["Rieke"],"firstnames":["George"],"suffixes":[]},{"propositions":[],"lastnames":["Reddy"],"firstnames":["Naveen"],"suffixes":[]},{"propositions":[],"lastnames":["Pope"],"firstnames":["Alexandra"],"suffixes":[]},{"propositions":[],"lastnames":["Kennicutt"],"firstnames":["Robert"],"suffixes":[]},{"propositions":[],"lastnames":["Mobasher"],"firstnames":["Bahram"],"suffixes":[]},{"propositions":[],"lastnames":["Coil"],"firstnames":["Alison"],"suffixes":[]},{"propositions":[],"lastnames":["Fudamoto"],"firstnames":["Yoshinobu"],"suffixes":[]},{"propositions":[],"lastnames":["Kriek"],"firstnames":["Mariska"],"suffixes":[]},{"propositions":[],"lastnames":["Lyu"],"firstnames":["Jianwei"],"suffixes":[]},{"propositions":[],"lastnames":["Oesch"],"firstnames":["Pascal"],"suffixes":[]},{"propositions":[],"lastnames":["Sanders"],"firstnames":["Ryan"],"suffixes":[]},{"propositions":[],"lastnames":["Shapley"],"firstnames":["Alice"],"suffixes":[]},{"propositions":[],"lastnames":["Siana"],"firstnames":["Brian"],"suffixes":[]}],"month":"January","year":"2022","note":"arXiv: 2201.04270","keywords":"Astrophysics - Astrophysics of Galaxies","bibtex":"@article{shivaei_ir_2022,\n\ttitle = {{IR} {SED} and {Dust} {Masses} of {Sub}-solar {Metallicity} {Galaxies} at z{\\textasciitilde}2.3},\n\turl = {http://arxiv.org/abs/2201.04270},\n\tabstract = {We present results from ALMA 1.2mm continuum observations of a sample of 27 star-forming galaxies at z=2.1-2.5 from the MOSFIRE Deep Evolution Field (MOSDEF) survey. These galaxies have gas-phase metallicity and star-formation rate measurements from Hb, [OIII], Ha, and [NII]. Using stacks of Spitzer, Herschel, and ALMA photometry (rest-frame {\\textasciitilde} 8-400\\${\\textbackslash}mu\\$m), we examine the IR SED of high-redshift subsolar metallicity ({\\textasciitilde}0.5 \\$Z\\_\\{{\\textbackslash}odot\\}\\$) LIRGs. We find that the data agree well with an average SED template of higher luminosity local low-metallicity dwarf galaxies (reduced \\${\\textbackslash}chi{\\textasciicircum}2\\$ of 1.8). When compared with the commonly used templates for solar-metallicity local galaxies or high-redshift LIRGs and ULIRGs, even in the most favorable case (with reduced \\${\\textbackslash}chi{\\textasciicircum}2\\$ of 2.8), the templates are rejected at {\\textgreater}98\\% confidence level. The broader and hotter IR SED of both the local dwarfs and high-redshift subsolar metallicity galaxies may result from different grain properties, a clumpy dust geometry, or a harder/more intense ionizing radiation field that heats the dust to higher temperatures. The obscured SFR indicated by the FIR emission of the subsolar metallicity galaxies is only {\\textasciitilde} 60\\% of the total SFR, which is considerably lower than that of the local LIRGs with {\\textasciitilde} 96-97\\% obscured fractions. Due to the evolving IR SED shape, the local LIRG templates fit to mid-IR data can overestimate the Rayleigh-Jeans tail measurements at z{\\textasciitilde}2 by a factor of 2-20, and these templates underestimate IR luminosities if fit to the observed ALMA fluxes by {\\textgreater}0.4dex. At a given stellar mass or metallicity, dust masses at z{\\textasciitilde}2.3 are an order of magnitude higher than those at z{\\textasciitilde}0. Given the predicted molecular gas mass fractions, the observed z{\\textasciitilde}2.3 dust-to-stellar mass ratios suggest lower dust-to-molecular gas masses than in local galaxies at the same metallicity.},\n\turldate = {2022-01-13},\n\tjournal = {arXiv:2201.04270 [astro-ph]},\n\tauthor = {Shivaei, Irene and Popping, Gergö and Rieke, George and Reddy, Naveen and Pope, Alexandra and Kennicutt, Robert and Mobasher, Bahram and Coil, Alison and Fudamoto, Yoshinobu and Kriek, Mariska and Lyu, Jianwei and Oesch, Pascal and Sanders, Ryan and Shapley, Alice and Siana, Brian},\n\tmonth = jan,\n\tyear = {2022},\n\tnote = {arXiv: 2201.04270},\n\tkeywords = {Astrophysics - Astrophysics of Galaxies},\n}\n\n","author_short":["Shivaei, I.","Popping, G.","Rieke, G.","Reddy, N.","Pope, A.","Kennicutt, R.","Mobasher, B.","Coil, A.","Fudamoto, Y.","Kriek, M.","Lyu, J.","Oesch, P.","Sanders, R.","Shapley, A.","Siana, B."],"key":"shivaei_ir_2022","id":"shivaei_ir_2022","bibbaseid":"shivaei-popping-rieke-reddy-pope-kennicutt-mobasher-coil-etal-irsedanddustmassesofsubsolarmetallicitygalaxiesatztextasciitilde23-2022","role":"author","urls":{"Paper":"http://arxiv.org/abs/2201.04270"},"keyword":["Astrophysics - Astrophysics of Galaxies"],"metadata":{"authorlinks":{}}},"bibtype":"article","biburl":"https://bibbase.org/zotero/polyphant","dataSources":["7gvjSdWrEu7z5vjjj"],"keywords":["astrophysics - astrophysics of galaxies"],"search_terms":["sed","dust","masses","sub","solar","metallicity","galaxies","textasciitilde2","shivaei","popping","rieke","reddy","pope","kennicutt","mobasher","coil","fudamoto","kriek","lyu","oesch","sanders","shapley","siana"],"title":"IR SED and Dust Masses of Sub-solar Metallicity Galaxies at z\\textasciitilde2.3","year":2022}