SCUBA-2 Ultra Deep Imaging EAO Survey(Studies). III. Multiwavelength Properties,Luminosity Functions, and Preliminary Source Catalog of 450μm Selected Galaxies

Chen-Fatt Lim; Wei-Hao Wang; Ian Smail; Douglas Scott; Chian-Chou Chen; Yu-Yen Chang; James M. Simpson; Yoshiki Toba; Xinwen Shu; Dave Clements; Josh Greenslade; YiPing Ao; Arif Babul; Jack Birkin; Scott C. Chapman; Tai-An Cheng; Brian S. Cho; Helmut Dannerbauer; Ugnė Dudzevičiūtė; James Dunlop; Yu Gao; Tomotsugu Goto; Luis C. Ho; Li-Ting Hsu; Ho Seong Hwang; Woong-Seob Jeong; Maciej Koprowski; Chien-Hsiu Lee; Ming-Yi Lin; Wei-Ching Lin; Michał J. Michałowski; Harriet Parsons; Marcin Sawicki; Raphael Shirley; Hyunjin Shim; Sheona Urquhart; Jianfa Wang; Tao Wang

doi:10.3847/1538-4357/ab607f

SCUBA-2 Ultra Deep Imaging EAO Survey(Studies). III. Multiwavelength Properties,Luminosity Functions, and Preliminary Source Catalog of 450μm Selected Galaxies

Chen-Fatt Lim^*, Wei-Hao Wang, Ian Smail, Douglas Scott, Chian-Chou Chen, Yu-Yen Chang, James M. Simpson, Yoshiki Toba, Xinwen Shu, Dave Clements, Josh Greenslade, YiPing Ao, Arif Babul, Jack Birkin, Scott C. Chapman, Tai-An Cheng, Brian S. Cho, Helmut Dannerbauer, Ugnė Dudzevičiūtė, James DunlopYu Gao, Tomotsugu Goto, Luis C. Ho, Li-Ting Hsu, Ho Seong Hwang, Woong-Seob Jeong, Maciej Koprowski, Chien-Hsiu Lee, Ming-Yi Lin, Wei-Ching Lin, Michał J. Michałowski, Harriet Parsons, Marcin Sawicki, Raphael Shirley, Hyunjin Shim, Sheona Urquhart, Jianfa Wang, Tao Wang

^*Corresponding author for this work

School of Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

Abstract

We construct a SCUBA-2 450 μm map in the COSMOS field that covers an area of 300 arcmin² and reaches a 1σ noise level of 0.65 mJy in the deepest region. We extract 256 sources detected at 450 μm with signal-to-noise ratios >4.0 and analyze the physical properties of their multiwavelength counterparts. We find that most of the sources are at z 3, with a median of . About of our sources are classified as starburst galaxies based on their total star formation rates (SFRs) and stellar masses (M_*). By fitting the far-infrared spectral energy distributions, we find that our 450 μm selected sample has a wide range of dust temperatures (20 K T_d 60 K), with a median of K. We do not find a redshift evolution in dust temperature for sources with at z < 3. However, we find a moderate correlation where the dust temperature increases with the deviation from the SFR–M_* relation. The increase in dust temperature also correlates with optical morphology, which is consistent with merger-triggered starbursts in submillimeter galaxies. Our galaxies do not show the tight IRX–β_UV correlation that has been observed in the local universe. We construct the infrared luminosity functions of our 450 μm sources and measure their comoving SFR densities (SFRDs). The contribution of the population to the SFRD rises dramatically from z = 0 to 2 (∝(1 + z)^3.9±1.1) and dominates the total SFRD at z 2.

Original language	English
Article number	80
Pages (from-to)	1-33
Number of pages	33
Journal	Astrophysical Journal
Volume	889
Issue number	2
DOIs	https://doi.org/10.3847/1538-4357/ab607f
Publication status	Published - 28 Jan 2020

Keywords

astro-ph.GA

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10.3847/1538-4357/ab607f

1912.03669v3Accepted author manuscript, 5.04 MB

https://arxiv.org/abs/1912.03669

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Lim, C-F., Wang, W-H., Smail, I., Scott, D., Chen, C-C., Chang, Y-Y., Simpson, J. M., Toba, Y., Shu, X., Clements, D., Greenslade, J., Ao, Y., Babul, A., Birkin, J., Chapman, S. C., Cheng, T-A., Cho, B. S., Dannerbauer, H., Dudzevičiūtė, U., ... Wang, T. (2020). SCUBA-2 Ultra Deep Imaging EAO Survey(Studies). III. Multiwavelength Properties,Luminosity Functions, and Preliminary Source Catalog of 450μm Selected Galaxies. Astrophysical Journal, 889(2), 1-33. [80]. https://doi.org/10.3847/1538-4357/ab607f

@article{47542362e1fd4c82bf97f6b8b112f5a3,

title = "SCUBA-2 Ultra Deep Imaging EAO Survey(Studies). III. Multiwavelength Properties,Luminosity Functions, and Preliminary Source Catalog of 450μm Selected Galaxies",

abstract = "We construct a SCUBA-2 450 μm map in the COSMOS field that covers an area of 300 arcmin2 and reaches a 1σ noise level of 0.65 mJy in the deepest region. We extract 256 sources detected at 450 μm with signal-to-noise ratios >4.0 and analyze the physical properties of their multiwavelength counterparts. We find that most of the sources are at z 3, with a median of . About of our sources are classified as starburst galaxies based on their total star formation rates (SFRs) and stellar masses (M*). By fitting the far-infrared spectral energy distributions, we find that our 450 μm selected sample has a wide range of dust temperatures (20 K Td 60 K), with a median of K. We do not find a redshift evolution in dust temperature for sources with at z < 3. However, we find a moderate correlation where the dust temperature increases with the deviation from the SFR–M* relation. The increase in dust temperature also correlates with optical morphology, which is consistent with merger-triggered starbursts in submillimeter galaxies. Our galaxies do not show the tight IRX–βUV correlation that has been observed in the local universe. We construct the infrared luminosity functions of our 450 μm sources and measure their comoving SFR densities (SFRDs). The contribution of the population to the SFRD rises dramatically from z = 0 to 2 (∝(1 + z)3.9±1.1) and dominates the total SFRD at z 2.",

keywords = "astro-ph.GA",

author = "Chen-Fatt Lim and Wei-Hao Wang and Ian Smail and Douglas Scott and Chian-Chou Chen and Yu-Yen Chang and Simpson, {James M.} and Yoshiki Toba and Xinwen Shu and Dave Clements and Josh Greenslade and YiPing Ao and Arif Babul and Jack Birkin and Chapman, {Scott C.} and Tai-An Cheng and Cho, {Brian S.} and Helmut Dannerbauer and Ugnė Dudzevi{\v c}iūtė and James Dunlop and Yu Gao and Tomotsugu Goto and Ho, {Luis C.} and Li-Ting Hsu and Hwang, {Ho Seong} and Woong-Seob Jeong and Maciej Koprowski and Chien-Hsiu Lee and Ming-Yi Lin and Wei-Ching Lin and Micha{\l}owski, {Micha{\l} J.} and Harriet Parsons and Marcin Sawicki and Raphael Shirley and Hyunjin Shim and Sheona Urquhart and Jianfa Wang and Tao Wang",

note = "Published in the ApJ",

year = "2020",

month = jan,

day = "28",

doi = "10.3847/1538-4357/ab607f",

language = "English",

volume = "889",

pages = "1--33",

journal = "Astrophysical Journal",

issn = "0004-637X",

publisher = "IOP Publishing Ltd.",

number = "2",

}

Lim, C-F, Wang, W-H, Smail, I, Scott, D, Chen, C-C, Chang, Y-Y, Simpson, JM, Toba, Y, Shu, X, Clements, D, Greenslade, J, Ao, Y, Babul, A, Birkin, J, Chapman, SC, Cheng, T-A, Cho, BS, Dannerbauer, H, Dudzevičiūtė, U, Dunlop, J, Gao, Y, Goto, T, Ho, LC, Hsu, L-T, Hwang, HS, Jeong, W-S, Koprowski, M, Lee, C-H, Lin, M-Y, Lin, W-C, Michałowski, MJ, Parsons, H, Sawicki, M, Shirley, R, Shim, H, Urquhart, S, Wang, J & Wang, T 2020, 'SCUBA-2 Ultra Deep Imaging EAO Survey(Studies). III. Multiwavelength Properties,Luminosity Functions, and Preliminary Source Catalog of 450μm Selected Galaxies', Astrophysical Journal, vol. 889, no. 2, 80, pp. 1-33. https://doi.org/10.3847/1538-4357/ab607f

TY - JOUR

T1 - SCUBA-2 Ultra Deep Imaging EAO Survey(Studies). III. Multiwavelength Properties,Luminosity Functions, and Preliminary Source Catalog of 450μm Selected Galaxies

AU - Lim, Chen-Fatt

AU - Wang, Wei-Hao

AU - Smail, Ian

AU - Scott, Douglas

AU - Chen, Chian-Chou

AU - Chang, Yu-Yen

AU - Simpson, James M.

AU - Toba, Yoshiki

AU - Shu, Xinwen

AU - Clements, Dave

AU - Greenslade, Josh

AU - Ao, YiPing

AU - Babul, Arif

AU - Birkin, Jack

AU - Chapman, Scott C.

AU - Cheng, Tai-An

AU - Cho, Brian S.

AU - Dannerbauer, Helmut

AU - Dudzevičiūtė, Ugnė

AU - Dunlop, James

AU - Gao, Yu

AU - Goto, Tomotsugu

AU - Ho, Luis C.

AU - Hsu, Li-Ting

AU - Hwang, Ho Seong

AU - Jeong, Woong-Seob

AU - Koprowski, Maciej

AU - Lee, Chien-Hsiu

AU - Lin, Ming-Yi

AU - Lin, Wei-Ching

AU - Michałowski, Michał J.

AU - Parsons, Harriet

AU - Sawicki, Marcin

AU - Shirley, Raphael

AU - Shim, Hyunjin

AU - Urquhart, Sheona

AU - Wang, Jianfa

AU - Wang, Tao

N1 - Published in the ApJ

PY - 2020/1/28

Y1 - 2020/1/28

N2 - We construct a SCUBA-2 450 μm map in the COSMOS field that covers an area of 300 arcmin2 and reaches a 1σ noise level of 0.65 mJy in the deepest region. We extract 256 sources detected at 450 μm with signal-to-noise ratios >4.0 and analyze the physical properties of their multiwavelength counterparts. We find that most of the sources are at z 3, with a median of . About of our sources are classified as starburst galaxies based on their total star formation rates (SFRs) and stellar masses (M*). By fitting the far-infrared spectral energy distributions, we find that our 450 μm selected sample has a wide range of dust temperatures (20 K Td 60 K), with a median of K. We do not find a redshift evolution in dust temperature for sources with at z < 3. However, we find a moderate correlation where the dust temperature increases with the deviation from the SFR–M* relation. The increase in dust temperature also correlates with optical morphology, which is consistent with merger-triggered starbursts in submillimeter galaxies. Our galaxies do not show the tight IRX–βUV correlation that has been observed in the local universe. We construct the infrared luminosity functions of our 450 μm sources and measure their comoving SFR densities (SFRDs). The contribution of the population to the SFRD rises dramatically from z = 0 to 2 (∝(1 + z)3.9±1.1) and dominates the total SFRD at z 2.

AB - We construct a SCUBA-2 450 μm map in the COSMOS field that covers an area of 300 arcmin2 and reaches a 1σ noise level of 0.65 mJy in the deepest region. We extract 256 sources detected at 450 μm with signal-to-noise ratios >4.0 and analyze the physical properties of their multiwavelength counterparts. We find that most of the sources are at z 3, with a median of . About of our sources are classified as starburst galaxies based on their total star formation rates (SFRs) and stellar masses (M*). By fitting the far-infrared spectral energy distributions, we find that our 450 μm selected sample has a wide range of dust temperatures (20 K Td 60 K), with a median of K. We do not find a redshift evolution in dust temperature for sources with at z < 3. However, we find a moderate correlation where the dust temperature increases with the deviation from the SFR–M* relation. The increase in dust temperature also correlates with optical morphology, which is consistent with merger-triggered starbursts in submillimeter galaxies. Our galaxies do not show the tight IRX–βUV correlation that has been observed in the local universe. We construct the infrared luminosity functions of our 450 μm sources and measure their comoving SFR densities (SFRDs). The contribution of the population to the SFRD rises dramatically from z = 0 to 2 (∝(1 + z)3.9±1.1) and dominates the total SFRD at z 2.

KW - astro-ph.GA

U2 - 10.3847/1538-4357/ab607f

DO - 10.3847/1538-4357/ab607f

M3 - Article

VL - 889

SP - 1

EP - 33

JO - Astrophysical Journal

JF - Astrophysical Journal

SN - 0004-637X

IS - 2

M1 - 80

ER -

SCUBA-2 Ultra Deep Imaging EAO Survey(Studies). III. Multiwavelength Properties,Luminosity Functions, and Preliminary Source Catalog of 450μm Selected Galaxies

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Keywords

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