Multiwavelength properties of 850-mu m selected sources from the North Ecliptic Pole SCUBA-2 survey
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Multiwavelength properties of 850-mu m selected sources from the North Ecliptic Pole SCUBA-2 survey. / Shim, Hyunjin; Lee, Dongseob; Kim, Yeonsik; Scott, Douglas; Serjeant, Stephen; Ao, Yiping; Barrufet, Laia; Chapman, Scott C.; Clements, David L.; Conselice, Christopher J.; Goto, Tomotsugu; Greve, Thomas R.; Hwang, Ho Seong; Im, Myungshin; Jeong, Woong-Seob; Kim, Helen K.; Kim, Minjin; Kim, Seong Jin; Kong, Albert K. H.; Koprowski, Maciej P.; Malkan, Matthew A.; Michalowski, Michal J.; Pearson, Chris; Seo, Hyunjong; Takagi, Toshinobu; Toba, Yoshiki; White, Glenn J.; Woo, Jong-Hak.
In: Monthly Notices of the Royal Astronomical Society, Vol. 514, No. 2, 22.06.2022, p. 2915-2935.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - Multiwavelength properties of 850-mu m selected sources from the North Ecliptic Pole SCUBA-2 survey
AU - Shim, Hyunjin
AU - Lee, Dongseob
AU - Kim, Yeonsik
AU - Scott, Douglas
AU - Serjeant, Stephen
AU - Ao, Yiping
AU - Barrufet, Laia
AU - Chapman, Scott C.
AU - Clements, David L.
AU - Conselice, Christopher J.
AU - Goto, Tomotsugu
AU - Greve, Thomas R.
AU - Hwang, Ho Seong
AU - Im, Myungshin
AU - Jeong, Woong-Seob
AU - Kim, Helen K.
AU - Kim, Minjin
AU - Kim, Seong Jin
AU - Kong, Albert K. H.
AU - Koprowski, Maciej P.
AU - Malkan, Matthew A.
AU - Michalowski, Michal J.
AU - Pearson, Chris
AU - Seo, Hyunjong
AU - Takagi, Toshinobu
AU - Toba, Yoshiki
AU - White, Glenn J.
AU - Woo, Jong-Hak
PY - 2022/6/22
Y1 - 2022/6/22
N2 - We present the multiwavelength counterparts of 850-mu m selected submillimetre sources over a 2-deg(2) field centred on the North Ecliptic Pole. In order to overcome the large beam size (15 arcsec) of the 850-mu m images, deep optical to near-infrared (NIR) photometric data and arcsecond-resolution 20-cm images are used to identify counterparts of submillimetre sources. Among 647 sources, we identify 514 reliable counterparts for 449 sources (69 per cent in number), based either on probabilities of chance associations calculated from positional offsets or offsets combined with the optical-to-NIR colours. In the radio imaging, the fraction of 850-mu m sources having multiple counterparts is 7 percent. The photometric redshift, infrared luminosity, stellar mass, star formation rate (SFR), and the active galactic nucleus (AGN) contribution to the total infrared luminosity of the identified counterparts are investigated through spectral energy distribution fitting. The SMGs are infrared-luminous galaxies at an average < z > = 2.5 with log(10)(L-IR/L-circle dot) = 11.5-13.5, with a mean stellar mass of log(10)(M-star/M-circle dot) = 10.90 and SFR of log(10)(SFR/M-circle dot yr(-1)) = 2.34. The submillimetre galaxies (SMGs) show twice as large SFR as galaxies on the star-forming main sequence, and about 40 per cent of the SMGs are classified as objects with bursty star formation. At z >= 4, the contribution of AGN luminosity to total luminosity for most SMGs is larger than 30 per cent. The FIR-to-radio correlation coefficient of SMGs is consistent with that of main-sequence galaxies at z similar or equal to 2.
AB - We present the multiwavelength counterparts of 850-mu m selected submillimetre sources over a 2-deg(2) field centred on the North Ecliptic Pole. In order to overcome the large beam size (15 arcsec) of the 850-mu m images, deep optical to near-infrared (NIR) photometric data and arcsecond-resolution 20-cm images are used to identify counterparts of submillimetre sources. Among 647 sources, we identify 514 reliable counterparts for 449 sources (69 per cent in number), based either on probabilities of chance associations calculated from positional offsets or offsets combined with the optical-to-NIR colours. In the radio imaging, the fraction of 850-mu m sources having multiple counterparts is 7 percent. The photometric redshift, infrared luminosity, stellar mass, star formation rate (SFR), and the active galactic nucleus (AGN) contribution to the total infrared luminosity of the identified counterparts are investigated through spectral energy distribution fitting. The SMGs are infrared-luminous galaxies at an average < z > = 2.5 with log(10)(L-IR/L-circle dot) = 11.5-13.5, with a mean stellar mass of log(10)(M-star/M-circle dot) = 10.90 and SFR of log(10)(SFR/M-circle dot yr(-1)) = 2.34. The submillimetre galaxies (SMGs) show twice as large SFR as galaxies on the star-forming main sequence, and about 40 per cent of the SMGs are classified as objects with bursty star formation. At z >= 4, the contribution of AGN luminosity to total luminosity for most SMGs is larger than 30 per cent. The FIR-to-radio correlation coefficient of SMGs is consistent with that of main-sequence galaxies at z similar or equal to 2.
KW - surveys
KW - galaxies: evolution
KW - galaxies: high-redshift
KW - galaxies: starburst
KW - submillimetre: galaxies
KW - COSMOLOGY LEGACY SURVEY
KW - DEEP FIELD-SOUTH
KW - STAR-FORMING GALAXIES
KW - BRIGHT SUBMILLIMETER SOURCES
KW - ACTIVE GALACTIC NUCLEI
KW - DUST-OBSCURED GALAXIES
KW - X-RAY-PROPERTIES
KW - ALMA SURVEY
KW - MU-M
KW - PHYSICAL-PROPERTIES
U2 - 10.1093/mnras/stac1105
DO - 10.1093/mnras/stac1105
M3 - Journal article
VL - 514
SP - 2915
EP - 2935
JO - Royal Astronomical Society. Monthly Notices
JF - Royal Astronomical Society. Monthly Notices
SN - 0035-8711
IS - 2
ER -
ID: 319597886