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J/ApJ/788/125   An ALMA survey of ECDFS submillimeter galaxies  (Simpson+, 2014)

An ALMA survey of submillimeter galaxies in the extended Chandra Deep Field-South: the redshift distribution and evolution of submillimeter galaxies. Simpson J.M., Swinbank A.M., Smail I., Alexander D.M., Brandt W.N., Bertoldi F., de Breuck C., Chapman S.C., Coppin K.E.K., da Cunha E., Danielson A.L.R., Dannerbauer H., Greve T.R., Hodge J.A., Ivison R.J., Karim A., Knudsen K.K., Poggianti B.M., Schinnerer E., Thomson A.P., Walter F., Wardlow J.L., Weiss A., van der Werf P.P. <Astrophys. J., 788, 125 (2014)> =2014ApJ...788..125S (SIMBAD/NED BibCode)
ADC_Keywords: Galaxies, photometry ; Photometry, millimetric/submm ; Photometry, UBVRIJKLMNH ; Redshifts Keywords: galaxies: evolution - galaxies: high-redshift - galaxies: starburst Abstract: We present the first photometric redshift distribution for a large sample of 870 µm submillimeter galaxies (SMGs) with robust identifications based on observations with ALMA. In our analysis we consider 96 SMGs in the Extended Chandra Deep Field South, 77 of which have 4-19 band photometry. We model the SEDs for these 77 SMGs, deriving a median photometric redshift of zphot=2.3±0.1. The remaining 19 SMGs have insufficient photometry to derive photometric redshifts, but a stacking analysis of Herschel observations confirms they are not spurious. Assuming that these SMGs have an absolute H-band magnitude distribution comparable to that of a complete sample of z∼1-2 SMGs, we demonstrate that they lie at slightly higher redshifts, raising the median redshift for SMGs to zphot=2.5±0.2. Critically we show that the proportion of galaxies undergoing an SMG-like phase at z≥3 is at most 35%±5% of the total population. We derive a median stellar mass of M*=(8±1)x1010 M, although there are systematic uncertainties of up to 5x for individual sources. Assuming that the star formation activity in SMGs has a timescale of ∼100 Myr, we show that their descendants at z∼0 would have a space density and MH distribution that are in good agreement with those of local ellipticals. In addition, the inferred mass-weighted ages of the local ellipticals broadly agree with the look-back times of the SMG events. Taken together, these results are consistent with a simple model that identifies SMGs as events that form most of the stars seen in the majority of luminous elliptical galaxies at the present day. Description: In this study we undertake a multi-wavelength analysis of the ALMA-detected submm galaxies from the catalog presented by Hodge et al. (2013, J/ApJ/768/91) (see also Karim et al. 2013MNRAS.432....2K). To briefly summarize the observations, we obtained 120 s integrations of 122 of the original 126 LESS submm sources, initially identified using the LABOCA camera on the APEX telescope (Weiss et al. 2009, J/ApJ/707/1201). These Cycle 0 observations used the compact configuration, yielding a median synthesized beam of ∼1.6"x1.2". The observing frequency was matched to the original LESS survey, 344 GHz (Band 7), and we reach a typical rms across our velocity-integrated maps of 0.4 mJy/beam. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 98 19 Summary of Photometry table2.dat 214 96 Photometry table3.dat 84 77 Derived Properties
See also: J/ApJS/155/73 : Photometric redshifts of X-ray sources in CDF-S (Zheng+, 2004) J/ApJ/622/772 : Redshift survey of submillimeter galaxies (Chapman+, 2005) J/ApJ/699/1610 : Spitzer survey of submillimeter galaxies (Hainline+, 2009) J/ApJ/707/1201 : LABOCA ECDFS Submillimeter Survey (LESS) (Weiss+, 2009) J/ApJS/191/124 : Optical spectroscopy of ECDF-S X-ray sources (Silverman+, 2010) J/ApJS/203/15 : Counterparts to 1.4GHz sources in ECDF-S (Bonzini+, 2012) J/ApJ/768/91 : ALMA observations of LESS submm galaxies (Hodge+, 2013) J/MNRAS/442/577 : Selected ALESS submm galaxies radio properties (Thomson+, 2014) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 19 A19 --- Filter Filter used in the observation 21- 24 F4.2 um lambda Effective wavelength 26- 29 F4.1 --- Limit 3σ detection limit in AB mag 31- 48 A18 --- r_Limit Detection limit reference 50- 68 A19 --- Bibcode Reference bibcode 70- 83 A14 --- Cat Catalog reference in VizieR 85- 98 A14 --- Com Comment on reference
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 5 A5 --- --- [ALESS] 7- 11 A5 --- ALESS SMG identifier (NN.NN; NNN.N) (1) 13 A1 --- f_ALESS [a] Flag on ALESS (2) 15 A1 --- l_UMmag [>] The 3σ upper limit on UMmag 17- 21 F5.2 mag UMmag ? MUSYC U band magnitude 23- 26 F4.2 mag e_UMmag ? Uncertainty in UMmag 28 A1 --- l_U38mag [>] The 3σ upper limit on U38mag 30- 34 F5.2 mag U38mag ? MUSYC U38 band magnitude 36- 39 F4.2 mag e_U38mag ? Uncertainty in U38mag 41 A1 --- l_UVmag [>] The 3σ upper limit on UVmag 43- 47 F5.2 mag UVmag ? VIMOS U band magnitude 49- 52 F4.2 mag e_UVmag ? Uncertainty in UVmag 54 A1 --- l_Bmag [>] The 3σ upper limit on Bmag 56- 60 F5.2 mag Bmag ? MUSYC WFI B band magnitude 62- 65 F4.2 mag e_Bmag ? Uncertainty in Bmag 67 A1 --- l_Vmag [>] The 3σ upper limit on Vmag 69- 73 F5.2 mag Vmag ? MUSYC WFI V band magnitude 75- 78 F4.2 mag e_Vmag ? Uncertainty in Vmag 80 A1 --- l_Rmag [>] The 3σ upper limit on Rmag 82- 86 F5.2 mag Rmag ? MUSYC WFI R band magnitude 88- 91 F4.2 mag e_Rmag ? Uncertainty in Rmag 93 A1 --- l_Imag [>] The 3σ upper limit on Imag 95- 99 F5.2 mag Imag ? MUSYC WFI I band magnitude 101-104 F4.2 mag e_Imag ? Uncertainty in Imag 106 A1 --- l_zmag [>] The 3σ upper limit on zmag 108-112 F5.2 mag zmag ? MUSYC Mosaic-II z band magnitude 114-117 F4.2 mag e_zmag ? Uncertainty in zmag 119 A1 --- l_Jmag [>] The 3σ upper limit on Jmag 121-125 F5.2 mag Jmag ? J band magnitude (TENIS if nothing in f_Ksmag) (3) 127-130 F4.2 mag e_Jmag ? Uncertainty in Jmag 132-133 A2 --- f_Jmag Flag on Jmag (4) 135 A1 --- l_Hmag [>] The 3σ upper limit on Hmag 137-141 F5.2 mag Hmag ? H band magnitude 143-146 F4.2 mag e_Hmag ? Uncertainty in Hmag 148 A1 --- l_Ksmag [>] The 3σ upper limit on Ksmag 150-154 F5.2 mag Ksmag ? KS band magnitude (TENIS if nothing in f_Ksmag) (3) 156-159 F4.2 mag e_Ksmag ? Uncertainty in Ksmag 161-162 A2 --- f_Ksmag [* **] Flag on Ksmag and Jmag (4) 164 A1 --- l_3.6mag [>] The 3σ upper limit on 3.6mag 166-170 F5.2 mag 3.6mag SIMPLE/IRAC 3.6 micron band magnitude 172-175 F4.2 mag e_3.6mag ? Uncertainty in 3.6mag 177 A1 --- l_4.5mag [>] The 3σ upper limit on 4.5mag 179-183 F5.2 mag 4.5mag SIMPLE/IRAC 4.5 micron band magnitude 185-188 F4.2 mag e_4.5mag ? Uncertainty in 4.5mag 190 A1 --- l_5.8mag [>] The 3σ upper limit on 5.8mag 192-196 F5.2 mag 5.8mag ? SIMPLE/IRAC 5.8 micron band magnitude 198-201 F4.2 mag e_5.8mag ? Uncertainty in 5.8mag 203 A1 --- l_8.0mag [>] The 3σ upper limit on 8.0mag 205-209 F5.2 mag 8.0mag ? SIMPLE/IRAC 8.0 micron band magnitude 211-214 F4.2 mag e_8.0mag ? Uncertainty in 8.0mag
Note (1): All photometry is left blank where a source is not covered by available imaging. Note (2): Flag as follows: a = Source is within 4" of a 3.6 micron source of comparable, or greater, flux. Note (3): We measure J and KS photometry from three imaging surveys, but quote a single value, in order of 3σ detection limit (see Table 1). Note (4): Flag as follows: * = Photometry measured from HAWK-I imaging; ** = Photometry measured from MUSYC imaging, otherwise photometry measured from TENIS imaging.
Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1- 5 A5 --- --- [ALESS] 7- 12 A6 --- ALESS SMG identifier (NNN.NN) 14 A1 --- f_ALESS [a] Flag on ALESS (1) 16- 17 I2 h RAh Hour of Right Ascension (J2000) 19- 20 I2 min RAm Minute of Right Ascension (J2000) 22- 26 F5.2 s RAs Second of Right Ascension (J2000) 28 A1 --- DE- Sign of the Declination (J2000) 29- 30 I2 deg DEd Degree of Declination (J2000) 32- 33 I2 arcmin DEm Arcminute of Declination (J2000) 35- 38 F4.1 arcsec DEs Arcsecond of Declination (J2000) 40- 43 F4.2 --- zphot Photometric redshift 45- 48 F4.2 --- E_zphot Upper limit uncertainty in zphot 50- 53 F4.2 --- e_zphot Lower limit uncertainty in zphot 55- 58 F4.2 --- zspec ? Spectroscopic redshift 60 A1 --- r_zspec zspec reference (2) 62- 66 F5.2 --- Chi2 Reduced Χ2 68- 69 I2 --- Detec Number of detection 71- 72 I2 --- Obs Number of observation 74- 79 F6.2 mag HMag Absolute H band AB magnitude 81- 84 F4.2 Msun/Lsun M/L H band mass-to-light ratio
Note (1): Flag as follows: a = As discussed in Section 3.2.1 these SMGs are potential gravitational lenses, or have significantly contaminated photometry. We advise that the photometric redshifts for these SMGs are treated with extreme caution. Note (2): Reference as follows: b = Casey et al. (2011MNRAS.411.2739C); c = Zheng et al. (2004, J/ApJS/155/73); d = Swinbank et al. (2012MNRAS.427.1066S); e = Silverman et al. (2010, J/ApJS/191/124); f = Kriek et al. (2008ApJ...677..219K); g = Coppin et al. (2009MNRAS.395.1905C); h = Coppin et al. (2012MNRAS.427..520C); Danielson et al. in prep; i = Bonzini et al. (2012, J/ApJS/203/15).
History: From electronic version of the journal
(End) Prepared by [AAS], Tiphaine Pouvreau [CDS] 17-Jul-2017
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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