J/ApJ/889/80 STUDIES. III. SCUBA-2 450um gal. with MIPS & VLA obs. (Lim+, 2020)
SCUBA-2 Ultra Deep Imaging EAO Survey (STUDIES).
III. Multiwavelength properties, luminosity functions, and preliminary source
catalog of 450 µm selected galaxies.
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.,
Dudzeviciute U., Dunlop J., Gao Y., Goto T., Ho L.C., Hsu L.-T.,
Hwang H.S., Jeong W.-S., Koprowski M., Lee C.-H., Lin M.-Y., Lin W.-C.,
Michalowski M.J., Parsons H., Sawicki M., Shirley R., Shim H., Urquhart S.,
Wang J., Wang T.
<Astrophys. J., 889, 80-80 (2020)>
=2020ApJ...889...80L 2020ApJ...889...80L (SIMBAD/NED BibCode)
ADC_Keywords: Galaxies, radio; Photometry, millimetric/submm;
Photometry, infrared; Redshifts; Surveys
Keywords: High-redshift galaxies; Galaxy evolution; Luminosity function
Submillimeter astronomy
Abstract:
We construct a SCUBA-2 450µm map in the COSMOS field that covers an
area of 300arcmin2 and reaches a 1σ noise level of 0.65mJy in
the deepest region. We extract 256 sources detected at 450µm 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 z=1.79-0.15+0.03%. About
35-25+32% 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 450µm selected sample has a wide range of dust
temperatures (20K≲Td≲60K), with a median of Td=38.3-0.9+0.4K.
We do not find a redshift evolution in dust temperature for sources
with LIR>1012L☉ 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 450µm sources and measure their comoving SFR densities
(SFRDs). The contribution of the LIR>1012L☉ 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.
Description:
The SCUBA-2 data presented in this paper come from three sources:
STUDIES (Wang+ 2017ApJ...850...37W 2017ApJ...850...37W), Casey+ (2013, J/MNRAS/436/191) work
in the COSMOS field, and the SCUBA-2 Cosmology Legacy Survey (S2CLS;
Geach+ 2013MNRAS.432...53G 2013MNRAS.432...53G and 2017, J/MNRAS/465/1789). We combine
these observations to produce an extremely deep 450um map.
We also use the Very Large Array (VLA)-COSMOS Large Project survey
conducted with the Jansky VLA at 3 GHz (Smolcic+ 2017, J/A+A/602/A2)
and the S-COSMOS infrared imaging survey carried out with the Spitzer
Space Telescope (Sanders+ 2007ApJS..172...86S 2007ApJS..172...86S).
As the archival MIPS 24um catalog published by
Sanders+ (2007ApJS..172...86S 2007ApJS..172...86S) contains only sources with
S24um>150uJy, we generated our own 24um catalog using SExtractor
(Bertin & Arnouts 1996A&AS..117..393B 1996A&AS..117..393B) and recalibrated the fluxes to
the Spitzer General Observer (GO) Cycle 3 total fluxes released by the
S-COSMOS team. See Section 2.2.
In this paper, we adopt the spectroscopic redshift catalog of
Hasinger+ (2018, J/ApJ/858/77), who compiled all of the spectroscopic
data of about 10000 objects that were observed through multislit
spectroscopy with the Deep Imaging Multi-Object Spectrograph on the
Keck II telescope. In addition, we also use the data from the zCOSMOS
survey (Lilly+ 2009, J/ApJS/184/218) conducted with the VIMOS
spectrograph on the Very Large Telescope and the hCOSMOS redshift
survey (Damjanov+ 2018, J/ApJS/234/21) observed with the Hectospec
spectrograph on the MMT (formerly Multiple Mirror Telescope).
See Section 4.2.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table2.dat 142 134 Derived properties of VLA 3-GHz
identified 450-um sources
table3.dat 140 76 Derived properties of MIPS 24-um
identified 450-um sources
table4.dat 127 134 Multi-wavelength photometry for VLA 3-GHz
identified 450-um sources
table5.dat 128 76 Multi-wavelength photometry for MIPS 24-um
identified 450-um sources
table6.dat 56 46 List of 450-um sources without VLA 3GHz and
MIPS 24um counterparts
--------------------------------------------------------------------------------
See also:
J/ApJ/614/671 : Hot, dusty ultraluminous galaxies at z∼2 (Chapman+, 2004)
J/ApJ/616/71 : Optical properties of SCUBA galaxies (Smail+, 2004)
J/ApJS/155/271 : Chandra Deep Field-South: Opt. spectroscopy (Szokoly+, 2004)
J/ApJ/622/772 : Redshift survey of submillimeter galaxies (Chapman+, 2005)
J/MNRAS/363/563 : SCUBA Half-Degree Extragalactic Survey. I. (Mortier+, 2005)
J/A+A/463/519 : VVDS-VLA Deep Field: 610 MHz catalog (Bondi+, 2007)
J/ApJ/663/81 : SED of hard X-ray selected AGN in XMDS (Polletta+, 2007)
J/MNRAS/379/1571 : SCUBA Half-Degree Extragalactic Survey. IV (Aretxaga+, 2007)
J/ApJS/172/70 : zCOSMOS-bright catalog (Lilly+, 2007)
J/MNRAS/385/2225 : AzTEC millimetre survey of COSMOS field (Scott+, 2008)
J/ApJ/692/556 : Star forming galaxy templates (Rieke+, 2009)
J/ApJ/696/1195 : COSMOS AGN spectroscopic survey. I. (Trump+, 2009)
J/MNRAS/397/281 : Radio imaging in Lockman Hole (Ibar+, 2009)
J/ApJS/184/218 : The zCOSMOS 10k-bright spectroscopic sample (Lilly+, 2009)
J/ApJ/707/1201 : LABOCA ECDFS Submillimeter Survey (LESS) (Weiss+, 2009)
J/ApJ/715/572 : GOALS UV and FIR properties (Howell+, 2010)
J/ApJ/719/763 : Millimeter-wave sources in the SPT survey (Vieira+, 2010)
J/MNRAS/411/102 : AzTEC/ASTE 1.1mm observations in the ADF-S (Hatsukade+ 2011)
J/MNRAS/415/3831 : AzTEC/ASTE source catalogue (Aretxaga+, 2011)
J/A+A/533/A119 : GOODS-Herschel North and South catalogs (Elbaz+, 2011)
J/A+A/545/A141 : UV selected sources in the GOODS-S field (Buat+, 2012)
J/MNRAS/426/1845 : AzTEC survey of the SHADES fields. II. (Michalowski+, 2012)
J/ApJ/761/140 : Spectroscopy of Herschel-SPIRE galaxies (Casey+, 2012)
J/ApJ/762/83 : Massive early-type galaxies in K-band (Chang+, 2013)
J/MNRAS/436/430 : SCUBA-2 cosmology legacy survey (Roseboom+, 2013)
J/ApJ/779/61 : SPT-SZ point sources at 95, 150 & 220GHz (Mocanu+, 2013)
J/MNRAS/436/1919 : SCUBA observations of COSMOS galaxies (Casey+, 2013)
J/MNRAS/439/1556 : ACT high significance 148 & 218GHz sources (Marsden+, 2014)
J/ApJ/788/125 : ALMA survey of ECDFS submillimeter galaxies (Simpson+, 2014)
J/MNRAS/442/577 : ALESS submm galaxies radio properties (Thomson+, 2014)
J/ApJ/793/115 : UV-continuum slopes beta for z∼4-8 galaxies (Bouwens+, 2014)
J/ApJ/806/110 : ALESS survey: SMGs in the ECDF-S data (da Cunha+, 2015)
J/ApJ/820/82 : S2CLS: multiwavelength counterparts to SMGs (Chen+, 2016)
J/ApJS/224/24 : The COSMOS2015 catalog (Laigle+, 2016)
J/MNRAS/458/4321 : SCUBA-2 galaxies in 850um survey (Koprowski+, 2016)
J/ApJ/832/78 : SCUBA-2 & LABOCA obs. of HATLAS galaxies (Ivison+, 2016)
J/MNRAS/464/3369 : SCUBA-2 EGS deep field (Zavala+, 2017)
J/MNRAS/465/1789 : SCUBA-2 Cosmology Legacy Survey (Geach+, 2017)
J/ApJ/837/139 : SUPER GOODS. I. Ultradeep SCUBA-2 survey (Cowie+, 2017)
J/ApJ/839/58 : ALMA submm galaxies multi-wavelength data (Simpson+, 2017)
J/A+A/602/A2 : VLA-COSMOS 3 GHz Large Project. II. (Smolcic+, 2017)
J/MNRAS/469/492 : JCMT/SCUBA2 obs. in COSMOS & UDS fields (Michalowski+ 2017)
J/ApJS/234/21 : hCOSMOS: Hectospec survey of COSMOS gal. (Damjanov+, 2018)
J/ApJ/858/77 : DEIMOS 10K sp. survey in COSMOS field (Hasinger+, 2018)
J/ApJ/865/103 : STUDIES. II. NIR morphologies of submm gal. (Chang+, 2018)
J/ApJ/865/106 : SUPER GOODS. III. SCUBA-2 sources with ALMA (Cowie+, 2018)
J/ApJ/880/43 : S2COSMOS: SCUBA-2 submm sources in COSMOS (Simpson+, 2019)
Byte-by-byte Description of file: table[23].dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 2 I2 h RAh [9/10] 450um Hour of Right Ascension (J2000)
(G1)
4- 5 I2 min RAm 450um Minute of Right Ascension (J2000) (G1)
7- 11 F5.2 s RAs 450um Second of Right Ascension (J2000) (G1)
13 A1 --- DE- [+] 450um Sign of Declination (J2000) (G1)
14 I1 deg DEd [2] 450um Degree of Declination (J2000) (G1)
16- 17 I2 arcmin DEm [12/33] 450um Arcminute of Declination (J2000)
(G1)
19- 23 F5.2 arcsec DEs 450um Arcsecond of Declination (J2000) (G1)
25- 26 I2 h RACh Hour of Right Ascension (J2000) (1)
28- 29 I2 min RACm Minute of Right Ascension (J2000) (1)
31- 35 F5.2 s RACs Second of Right Ascension (J2000) (1)
37 A1 --- DEC- Sign of Declination (J2000) (1)
38 I1 deg DECd Degree of Declination (J2000) (1)
40- 41 I2 arcmin DECm Arcminute of Declination (J2000) (1)
43- 47 F5.2 arcsec DECs Arcsecond of Declination (J2000) (1)
49- 53 F5.2 mJy S450 [1.9/42.3] The 450 micron flux density (G2)
55- 58 F4.2 mJy e_S450 [0.6/8.1] Uncertainty in S450
60- 64 F5.2 mJy S850 [1.4/14.3]? The 850 micron flux density (G2)
66- 69 F4.2 mJy e_S850 [0.1/1.6]? Uncertainty in S850
71- 74 F4.2 --- z [0.1/4.8]? Public redshift
76- 79 F4.2 --- e_z [0/1.9]? Uncertainty in z
81 I1 --- f_z [0/3] Flag on z (2)
83- 87 F5.2 [Msun] logM* [7.7/11.6]? Log stellar mass
89- 92 F4.2 [Msun] e_logM* [0.2/0.4]? Uncertainty in logM* (3)
94- 98 F5.2 [Lsun] logLUV [7.5/12.5]? Log GALEX UV luminosity (G3)
100- 103 F4.2 [Lsun] e_logLUV [0/0.5]? Uncertainty in logLUV
105- 109 F5.2 [Lsun] logLIR [10.2/13.4] Log IR luminosity
111- 114 F4.2 [Lsun] e_logLIR [0.03/0.6] Uncertainty in logLIR (3)
116- 120 F5.2 K Td [17/66]? Dust temperature
122- 126 F5.2 K e_Td [0.09/16]? Uncertainty in Td
128- 133 F6.2 --- betaUV [-11.3/11.6]? Dust UV emissivity spectral
index
135- 138 F4.2 --- e_betaUV [0.2/4.4]? Uncertainty in betaUV
140- 142 A3 --- flag AGN flag (s) (4)
--------------------------------------------------------------------------------
Note (1): VLA 3-GHz image coordinates (Table 2) or MIPS 24-um image
coordinates (Table 3).
Note (2): Flag as follows:
1 = spectroscopic redshift;
2 = photometric redshift;
3 = FIR redshift.
Note (3): Derived from LE PHARE code (Arnouts+ 1999MNRAS.310..540A 1999MNRAS.310..540A &
Ilbert+ 2006A&A...457..841I 2006A&A...457..841I) by including the photometric errors in
each waveband but without including the redshift uncertainties.
Note (4): AGN flag as follows:
1 = X-ray AGN;
2 = mid-infrared AGN;
3 = radio excess.
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table[45].dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 2 I2 h RAh [9/10] 450um Hour of Right Ascension (J2000)
(G1)
4- 5 I2 min RAm 450um Minute of Right Ascension (J2000) (G1)
7- 11 F5.2 s RAs 450um Second of Right Ascension (J2000) (G1)
13 A1 --- DE- [+] 450um Sign of Declination (J2000) (G1)
14 I1 deg DEd [2] 450um Degree of Declination (J2000) (G1)
16- 17 I2 arcmin DEm [12/33] 450um Arcminute of Declination (J2000)
(G1)
19- 23 F5.2 arcsec DEs 450um Arcsecond of Declination (J2000) (G1)
25- 26 I2 h RAOh ? Optical Hour of Right Ascension (J2000)
28- 29 I2 min RAOm ? Optical Minute of Right Ascension (J2000)
31- 35 F5.2 s RAOs ? Optical Second of Right Ascension (J2000)
37 A1 --- DEO- ? Optical Sign of Declination (J2000) (G1)
38 I1 deg DEOd ? Optical Degree of Declination (J2000)
40- 41 I2 arcmin DEOm ? Optical Arcminute of Declination (J2000)
43- 47 F5.2 arcsec DEOs ? Optical Arcsecond of Declination (J2000)
49- 53 F5.2 mag rmag [19.19/26.9]? Apparent Subaru/Suprime-cam
r band magnitude (G3)
55- 58 F4.2 mag e_rmag [0/0.41]? Uncertainty in rmag
60- 64 F5.2 mag Ksmag [17.57/24.4]? Apparent VISTA/VIRCAM
Ks band magnitude (G3)
66- 69 F4.2 mag e_Ksmag [0/0.28]? Uncertainty in Ksmag
71- 75 F5.2 mJy S3.6 [17.26/23.62]? The Spitzer/IRAC 3.6um flux
density (from Sanders+ 2007ApJS..172...86S 2007ApJS..172...86S)
77- 80 F4.2 mJy e_S3.6 [0/0.06]? Uncertainty in S3.6
82- 86 F5.2 mJy S250 [0.7/87] The Herschel/SPIRE 250um flux
density (G4)
88- 91 F4.2 mJy e_S250 [0.7/3.8] Uncertainty in S250
93- 97 F5.2 mJy S450 [1.98/42.3] The JCMT/SCUBA-2 450um flux
density (G2)
99- 102 F4.2 mJy e_S450 [0.6/8.1] Uncertainty in S450
104- 108 F5.2 mJy S850 [1.45/14.3]? The JCMT/SCUBA-2 850um flux
density (G2)
110- 113 F4.2 mJy e_S850 [0.1/1.6]? Uncertainty in S850
115- 121 F7.2 mJy SC The VLA 3GHz (Table 4) or MISP 24um (Table 5)
flux density
123- 128 F6.2 mJy e_SC Uncertainty in SC
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table6.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 2 I2 h RAh [10] Hour of Right Ascension (J2000)
4- 5 I2 min RAm [0] Minute of Right Ascension (J2000)
7- 11 F5.2 s RAs Second of Right Ascension (J2000)
13 A1 --- DE- [+] 450um Sign of Declination (J2000) (G1)
14 I1 deg DEd [2] Degree of Declination (J2000)
16- 17 I2 arcmin DEm [11/34] Arcminute of Declination (J2000)
19- 23 F5.2 arcsec DEs Arcsecond of Declination (J2000)
25- 29 F5.2 mJy S250 [0.2/46] The Herschel/SPIRE 250um flux
density (G4)
31- 34 F4.2 mJy e_S250 [0.4/3.1] Uncertainty in S250
36- 40 F5.2 mJy S450 [2.16/51.2] The JCMT/SCUBA-2 450um flux
density (G2)
42- 46 F5.2 mJy e_S450 [0.6/13.7] Uncertainty in S450
48- 51 F4.2 mJy S850 [1.4/5]? The JCMT/SCUBA-2 850um flux
density (G2)
53- 56 F4.2 mJy e_S850 [0.1/0.3]? Uncertainty in S850
--------------------------------------------------------------------------------
Global notes:
Note (G1): In the 450 micron image. The positional error at 90% confidence
interval is ∼4" in radius (see more in Section A).
Note (G2): Corrected for flux boosting.
Note (G3): GALEX UV, Suprime-cam/Subaru r-band and VIRCAM/VISTA Ks-band
from COSMOS2015 (Laigle+, 2016, J/ApJS/224/24)
Note (G4): Herschel/SPIRE 250um flux estimated from
XID+ (Hurley+ 2017MNRAS.464..885H 2017MNRAS.464..885H) with our 450-um sources as
positional priors (see Section 2.2).
--------------------------------------------------------------------------------
History:
From electronic version of the journal
References:
Wang et al. 2017ApJ...850...37W 2017ApJ...850...37W
Chang et al. Paper II. 2018ApJ...865..103C 2018ApJ...865..103C Cat. J/ApJ/865/103
Lim et al. Paper III. 2020ApJ...889...80L 2020ApJ...889...80L This catalog
Lim et al. Paper IV. 2020ApJ...895..104L 2020ApJ...895..104L
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 19-Oct-2021