J/ApJ/727/83 A panchromatic study of BLAST counterparts (Moncelsi+, 2011)
A panchromatic study of BLAST counterparts: total star formation rate, morphology, active galactic nucleus fraction, and stellar mass. Moncelsi L., Ade P.A.R., Chapin E.L., Cortese L., Devlin M.J., Dye S., Eales S., Griffin M., Halpern M., Hargrave P.C., Marsden G., Mauskopf P., Netterfield C.B., Pascale E., Scott D., Truch M.D.P., Tucker C., Viero M.P., Wiebe D.V. <Astrophys. J., 727, 83 (2011)> =2011ApJ...727...83M
ADC_Keywords: Galaxies, IR ; Active gal. nuclei ; Millimetric/submm sources ; Ultraviolet ; Redshifts ; Equivalent widths Keywords: cosmology: observations - galaxies: evolution - galaxies: high-redshift - galaxies: star formation - submillimeter: galaxies Abstract: We carry out a multi-wavelength study of individual galaxies detected by the Balloon-borne Large Aperture Submillimeter Telescope (BLAST) and identified at other wavelengths, using data spanning the radio to the ultraviolet (UV). We develop a Monte Carlo method to account for flux boosting, source blending, and correlations among bands, which we use to derive deboosted far-infrared (FIR) luminosities for our sample. We estimate total star-formation rates (SFRs) for BLAST counterparts with z≤0.9 by combining their FIR and UV luminosities. We assess that about 20% of the galaxies in our sample show indication of a type 1 active galactic nucleus, but their submillimeter emission is mainly due to star formation in the host galaxy. We compute stellar masses for a subset of 92 BLAST counterparts; these are relatively massive objects, with a median mass of ∼1011M☉, which seem to link the 24um and Submillimetre Common-User Bolometer Array (SCUBA) populations, in terms of both stellar mass and star formation activity. Description: We use data from the wide-area extragalactic survey of BLAST described by Devlin et al. (2009, Cat. J/other/Nat/458.737), and centered on the GOODS-S region. The maps cover an area of 8.7deg2 with a 1σ depth of 36, 31, and 20mJy at 250, 350, and 500um, respectively. An optical spectroscopic follow-up of the BLAST IDs was carried out with the AAOmega optical spectrograph at the Anglo-Australian Telescope. The BLAST spectroscopic redshift survey is discussed in Eales et al. (2009, Cat. J/ApJ/707/1779) as well as the reduction of the spectral data; here we extend their analysis and results. We identify near-UV (NUV) and far-UV (FUV) counterparts to BLAST IDs by searching for GALEX sources in the Deep Imaging Survey (DIS; data release GR-4/5) within 6" of the radio or 24um counterpart. We also use 70 and 160um fluxes extracted from SWIRE maps (Lonsdale et al. 2004ApJS..154...54L). File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file tableb1.dat 113 227 Primary counterparts to ≥5σ BLAST sources: redshift, spectral and morphological information tableb2.dat 143 227 Primary counterparts to ≥5σ BLAST sources: UV and FIR properties
See also: II/290 : SWIRE Photometric Redshift Catalogue (Rowan-Robinson+, 2008) II/253 : Chandra Deep Field South: multi-colour data (Wolf+, 2008) J/MNRAS/411/505 : Submm observations in Extended Chandra DFS (Chapin+, 2011) J/ApJS/183/295 : A K-selected cat. of the ECDFS from MUSYC (Taylor+, 2009) J/A+A/504/751 : GOODS-MUSIC catalog updated version (Santini+, 2009) J/ApJ/707/1779 : BLAST: the redshift survey (Eales+, 2009) J/ApJ/707/1201 : LABOCA ECDFS Submillimeter Survey (LESS) (Weiss+, 2009) J/ApJ/703/285 : Radio and IR counterparts of BLAST sources in CDFS (Dye+, 2009) J/other/Nat/458.737 : BLAST sources at 250, 350 and 500um (Devlin+, 2009) J/AJ/138/1261 : Spitzer observations of the COSMOS field (Frayer+, 2009) J/ApJS/179/114 : VLA 1.4GHz survey of E-CDF-S (Miller+, 2008) J/A+A/465/1099 : Redshift catalog of 691 objects in CDFS (Ravikumar+, 2007) J/ApJS/164/38 : UV and FIR properties of galaxies (Iglesias-Paramo+, 2006) J/AJ/132/2409 : Deep ATLAS radio observations of CDFS (Norris+, 2006) J/ApJS/162/1 : MUSYC: optical source catalog (Gawiser+, 2006) J/A+A/454/453 : Redshifts of IDS galaxies (Della Valle+, 2006) J/MNRAS/372/1621 : SCUBA Half-Degree Extragalactic Survey. II (Coppin+, 2006) J/ApJ/622/772 : Redshift survey of submillimeter galaxies (Chapman+, 2005) J/ApJ/586/794 : Multiwavelength luminosities of galaxies (Bell, 2003) J/MNRAS/300/417 : Durham/UKST Galaxy Redshift Survey (Ratcliffe+, 1998) Byte-by-byte Description of file: tableb1.dat
Bytes Format Units Label Explanations
1- 3 I3 --- Seq [1/376] BLAST identification number 5- 9 A5 --- --- [BLAST] 11- 24 A14 --- BLAST Full IAU BLAST source name (JHHMMSS+DDMMSS) 26- 34 F9.6 deg RAdeg Right Ascension (BLAST) in decimal degrees (J2000) (1) 36- 45 F10.6 deg DEdeg Declination (BLAST) in decimal degrees (J2000) (1) 47 I1 --- Deep [0/1] Source located within BGS-Deep (1=Yes) 49- 56 F8.6 --- z [0.014/2.57]? Redshift (spectro or photo) 58 A1 --- f_z [0/1] Redshift flag (1=spectroscopic; 0=photometric) 60- 66 A7 --- Ref Redshift provenance; see Section 2.6 (2) 67 A1 --- r_z Reference for NED redshift (3) 69- 72 F4.1 0.1nm EW ? Hα rest-frame equivalent width from AAOmega spectra, in Angstroms. 74- 77 F4.1 0.1nm e_EW ? Uncertainty in EW 79- 82 F4.2 --- NII/Ha ? The [NII](658.3nm)/Hα ratio 84-103 A20 --- AGN Presence of an AGN in host galaxy (4) 105-106 A2 --- Q [Q? ] Quasar flag (5) 108-113 A6 --- Morph Morphological classification (6)
Note (1): The position of the counterpart (the arithmetic mean between the two sets of coordinates if both the radio and 24µm counterparts are present). Note (2): In addition to the 82 spectroscopic redshifts obtained with AAO for the BLAST primary IDs, we have found five additional spectroscopic redshifts by exploring the NASA/IPAC Extragalactic Database (NED) with a 1" search radius around each ID. For the other sources, we use photometric redshifts from the MUSYC-EAZY ("EASY"; Taylor et al. 2009, Cat. J/ApJS/183/295), COMBO-17 (Wolf et al. 2004, Cat. II/253; 2008A&A...492..933W; only sources with R≤24) and Rowan-Robinson et al. ("RR"; 2008, Cat. II/290) catalogs, using again a 1" search radius. Note (3): Reference as follows: a = Colless et al. (2003astro.ph..6581C); b = Ratcliffe et al. (1998, Cat. J/MNRAS/300/417); c = Ravikumar et al. (2007, Cat. J/A+A/465/1099). Note (4): For AGN, Based on line ratios ([NII]/Hα>0.6, Kauffmann et al. 2003MNRAS.346.1055K; Miller et al. 2003ApJ...597..142M), or for a quasar, based solely on the broadness of the lines (we also indicate with "NED" objects flagged as AGN in NED). Note (5): Based solely on optical and mid-IR (IRAC) colors (see Section 6 for details). Note (6): See Section 7 for details. Code as follows: S = spiral; IS = interacting system; E = elliptical; C = compact; RC = red compact; BC = blue compact.
Byte-by-byte Description of file: tableb2.dat
Bytes Format Units Label Explanations
1- 3 I3 --- Seq [1/376] BLAST identification number 5- 9 A5 --- --- [GALEX] 11- 26 A16 --- GALEX Full IAU GALEX source name (JHHMMSS.s+DDMMSS) 28- 36 F9.6 deg RAGdeg ? GALEX Right Ascension in decimal degrees (J2000) 38- 47 F10.6 deg DEGdeg ? GALEX Declination in decimal degrees (J2000) 49- 53 F5.2 mag FUV ? GALEX/FUV band magnitude 55- 58 F4.2 mag e_FUV ? Uncertainty in FUV 60- 65 F6.3 mag NUV ? GALEX/NUV band magnitude 67- 71 F5.3 mag e_NUV ? Uncertainty in NUV 73- 79 F7.5 mag E(B-V) ? Schlegel et al. 1998ApJ...500..525S Galactic extinction correction 81- 87 F7.2 Msun/yr SFRF ? Star formation rate from FUV flux (7) 89- 94 F6.2 Msun/yr e_SFRF ? Uncertainty in SFRF 96-101 F6.2 Msun/yr SFRN ? Star formation rate from NUV flux (7) 103-107 F5.2 Msun/yr e_SFRN ? Uncertainty in SFRN 109-115 F7.2 10+10Lsun LFIR ? BLAST rest-frame bolometric FIR luminosity 117-122 F6.2 10+10Lsun e_LFIR ? Lower limit uncertainty in LFIR (8) 124-129 F6.2 10+10Lsun E_LFIR ? Upper limit uncertainty in LFIR (8) 131-136 F6.3 10+10Msun Mass ? BLAST stellar mass 138-143 F6.3 10+10Msun e_Mass ? Uncertainty in Mass
Note (7): See Equation 3. Note that we listed SFRF for all FUV sources, even if only those with z<0.36 are to be considered reliable and SFRN for all NUV sources, even if only those with z<0.91 are to be considered reliable, see 4.2. Note (8): We quote the mode, and 68% c.l. of the distribution obtained, see Section 3.2.
History: From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 28-Aug-2012
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