A simple numerical experiment on the dust temperature bias for Lyman break galaxies at z ≳ 5. Chen, Y. Y., Hirashita, H., Wang, W., & Nakai, N. Monthly Notices of the Royal Astronomical Society, November, 2021. ADS Bibcode: 2021MNRAS.tmp.2904C![A simple numerical experiment on the dust temperature bias for Lyman break galaxies at z ≳ 5 [link]](https://bibbase.org/img/filetypes/link.svg "link")
Paper doi abstract bibtex Some studies suggest that the dust temperatures (Td) in high-redshift (z ≳ 5) Lyman break galaxies (LBGs) are high. However, possible observational bias in Td is yet to be understood. Thus, we perform a simple test using random realizations of LBGs with various stellar masses, dust temperatures, and dust-to-stellar mass ratios, and examine how the sample detected by ALMA is biased in terms of Td. We show that ALMA tends to miss high-Td objects even at total dust luminosity LIR \textgreater 1011 L⊙. LBGs are, however, basically selected by the stellar UV luminosity. The dust-temperature bias in a UV-selected sample is complicated because of the competing effects between high Td and low dust abundance. For ALMA Band 6, there is no tendency of high-Td LBGs being more easily detected in our experiment. Thus, we suggest that the observed trend of high Td in z ≳ 5 LBGs is real. We also propose that the 450 \${\textbackslash}rm \{{\textbackslash}mu m\}\$ band is useful in further clarifying the dust temperatures. To overcome the current shallowness of 450 \${\textbackslash}rm \{{\textbackslash}mu m\}\$ observations, we examine a future Antarctic 30-m class telescope with a suitable atmospheric condition for wavelengths \${\textbackslash}lesssim 450{\textasciitilde}{\textbackslash}rm \{{\textbackslash}mu m\}\$, where the detection is not confusion-limited. We find that, with this telescope, an LIR-selected sample with log (LIR/L⊙) \textgreater 11 is constructed for z ≳ 5, and detection in the intermediate-M⋆ (stellar mass) range [9 \textless log (M⋆/M⊙) \textless 9.5] is much improved, especially at high Td.
@article{chen_simple_2021,
title = {A simple numerical experiment on the dust temperature bias for {Lyman} break galaxies at z ≳ 5},
issn = {0035-8711},
url = {https://ui.adsabs.harvard.edu/abs/2021MNRAS.tmp.2904C},
doi = {10.1093/mnras/stab3142},
abstract = {Some studies suggest that the dust temperatures (Td) in high-redshift (z ≳ 5) Lyman break galaxies (LBGs) are high. However, possible observational bias in Td is yet to be understood. Thus, we perform a simple test using random realizations of LBGs with various stellar masses, dust temperatures, and dust-to-stellar mass ratios, and examine how the sample detected by ALMA is biased in terms of Td. We show that ALMA tends to miss high-Td objects even at total dust luminosity LIR {\textgreater} 1011 L⊙. LBGs are, however, basically selected by the stellar UV luminosity. The dust-temperature bias in a UV-selected sample is complicated because of the competing effects between high Td and low dust abundance. For ALMA Band 6, there is no tendency of high-Td LBGs being more easily detected in our experiment. Thus, we suggest that the observed trend of high Td in z ≳ 5 LBGs is real. We also propose that the 450 \${\textbackslash}rm \{{\textbackslash}mu m\}\$ band is useful in further clarifying the dust temperatures. To overcome the current shallowness of 450 \${\textbackslash}rm \{{\textbackslash}mu m\}\$ observations, we examine a future Antarctic 30-m class telescope with a suitable atmospheric condition for wavelengths \${\textbackslash}lesssim 450{\textasciitilde}{\textbackslash}rm \{{\textbackslash}mu m\}\$, where the detection is not confusion-limited. We find that, with this telescope, an LIR-selected sample with log (LIR/L⊙) {\textgreater} 11 is constructed for z ≳ 5, and detection in the intermediate-M⋆ (stellar mass) range [9 {\textless} log (M⋆/M⊙) {\textless} 9.5] is much improved, especially at high Td.},
urldate = {2021-11-29},
journal = {Monthly Notices of the Royal Astronomical Society},
author = {Chen, Yung Ying and Hirashita, Hiroyuki and Wang, Wei-Hao and Nakai, Naomasa},
month = nov,
year = {2021},
note = {ADS Bibcode: 2021MNRAS.tmp.2904C},
keywords = {Astrophysics - Astrophysics of Galaxies, dust, extinction, galaxies: evolution, galaxies: high-redshift, galaxies: statistics, infrared: galaxies, submillimetre: galaxies},
}
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LBGs are, however, basically selected by the stellar UV luminosity. The dust-temperature bias in a UV-selected sample is complicated because of the competing effects between high Td and low dust abundance. For ALMA Band 6, there is no tendency of high-Td LBGs being more easily detected in our experiment. Thus, we suggest that the observed trend of high Td in z ≳ 5 LBGs is real. We also propose that the 450 \\${\\textbackslash}rm \\{{\\textbackslash}mu m\\}\\$ band is useful in further clarifying the dust temperatures. To overcome the current shallowness of 450 \\${\\textbackslash}rm \\{{\\textbackslash}mu m\\}\\$ observations, we examine a future Antarctic 30-m class telescope with a suitable atmospheric condition for wavelengths \\${\\textbackslash}lesssim 450{\\textasciitilde}{\\textbackslash}rm \\{{\\textbackslash}mu m\\}\\$, where the detection is not confusion-limited. We find that, with this telescope, an LIR-selected sample with log (LIR/L⊙) \\textgreater 11 is constructed for z ≳ 5, and detection in the intermediate-M⋆ (stellar mass) range [9 \\textless log (M⋆/M⊙) \\textless 9.5] is much improved, especially at high Td.","urldate":"2021-11-29","journal":"Monthly Notices of the Royal Astronomical Society","author":[{"propositions":[],"lastnames":["Chen"],"firstnames":["Yung","Ying"],"suffixes":[]},{"propositions":[],"lastnames":["Hirashita"],"firstnames":["Hiroyuki"],"suffixes":[]},{"propositions":[],"lastnames":["Wang"],"firstnames":["Wei-Hao"],"suffixes":[]},{"propositions":[],"lastnames":["Nakai"],"firstnames":["Naomasa"],"suffixes":[]}],"month":"November","year":"2021","note":"ADS Bibcode: 2021MNRAS.tmp.2904C","keywords":"Astrophysics - Astrophysics of Galaxies, dust, extinction, galaxies: evolution, galaxies: high-redshift, galaxies: statistics, infrared: galaxies, submillimetre: galaxies","bibtex":"@article{chen_simple_2021,\n\ttitle = {A simple numerical experiment on the dust temperature bias for {Lyman} break galaxies at z ≳ 5},\n\tissn = {0035-8711},\n\turl = {https://ui.adsabs.harvard.edu/abs/2021MNRAS.tmp.2904C},\n\tdoi = {10.1093/mnras/stab3142},\n\tabstract = {Some studies suggest that the dust temperatures (Td) in high-redshift (z ≳ 5) Lyman break galaxies (LBGs) are high. However, possible observational bias in Td is yet to be understood. Thus, we perform a simple test using random realizations of LBGs with various stellar masses, dust temperatures, and dust-to-stellar mass ratios, and examine how the sample detected by ALMA is biased in terms of Td. We show that ALMA tends to miss high-Td objects even at total dust luminosity LIR {\\textgreater} 1011 L⊙. LBGs are, however, basically selected by the stellar UV luminosity. The dust-temperature bias in a UV-selected sample is complicated because of the competing effects between high Td and low dust abundance. For ALMA Band 6, there is no tendency of high-Td LBGs being more easily detected in our experiment. Thus, we suggest that the observed trend of high Td in z ≳ 5 LBGs is real. We also propose that the 450 \\${\\textbackslash}rm \\{{\\textbackslash}mu m\\}\\$ band is useful in further clarifying the dust temperatures. To overcome the current shallowness of 450 \\${\\textbackslash}rm \\{{\\textbackslash}mu m\\}\\$ observations, we examine a future Antarctic 30-m class telescope with a suitable atmospheric condition for wavelengths \\${\\textbackslash}lesssim 450{\\textasciitilde}{\\textbackslash}rm \\{{\\textbackslash}mu m\\}\\$, where the detection is not confusion-limited. 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