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J/A+A/508/117       Spitzer selected starbursts at z∼2       (Fiolet+, 2009)

Multi-wavelength properties of Spitzer selected starbursts at z∼2. Fiolet N., Omont A., Polletta M., Owen F., Berta S., Shupe D., Siana B., Lonsdale C., Strazzullo V., Pannella M., Baker A.J., Beelen A., Biggs A., De Breuck C., Farrah D., Ivison R., Lagache G., Lutz D., Tacconi L.J., Zylka R. <Astron. Astrophys., 508, 117-132 (2009)> =2009A&A...508..117F
ADC_Keywords: Galaxies, radio ; Galaxies, IR ; Redshifts ; Photometry, SDSS ; Photometry, infrared Keywords: galaxies: high-redshift - galaxies: starburst - galaxies: active - infrared: galaxies - submillimeter - radio continuum: galaxies Abstract: Wide-field Spitzer surveys allow identification of thousands of potentially high-z submillimeter galaxies (SMGs) through their bright 24um emission and their mid-IR colors. We want to determine the average properties of such z∼2 Spitzer-selected SMGs by combining millimeter, radio, and infrared photometry for a representative IR-flux (lambdarest∼8um) limited sample of SMG candidates. A complete sample of 33 sources believed to be starbursts (5.8um-peakers) was selected in the (0.5deg2) J1046+56 field with selection criteria F_24um>400uJy, the presence of a redshifted stellar emission peak at 5.8um, and r'Vega>23. The field, part of the SWIRE Lockman Hole field, benefits from very deep VLA/GMRT 20cm, 50cm, and 90cm radio data (all 33 sources are detected at 50cm), and deep 160um and 70um Spitzer data. The 33 sources, with photometric redshifts ∼1.5-2.5, were observed at 1.2mm with IRAM-30m/MAMBO to an rms ∼0.7-0.8mJy in most cases. Their millimeter, radio, 7-band Spitzer, and near-IR properties were jointly analyzed. Description: Observations were made during the winter 2006/2007 MAMBO observing pool between December 2006 and March 2007 at the IRAM 30m telescope, located at Pico Veleta, Spain, using the 117-element version of the MAMBO array operating at 1.2mm (250GHz). File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 117 33 *Optical, near-IR and Spitzer mid-IR data of the selected sample table4.dat 88 33 1.2mm and radio data table5.dat 71 33 Luminosities and star formation rates
Note on table1.dat: The optical magnitude limits correspond to 90% completeness values derived in the field where our sample was selected, but note that the coverage of the optical observations is not uniform across the field. The optical data come from NOAO and the Near-IR magnitudes from UKIRT (see text).
Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 3 A3 --- Name Sequential number, LNN 5- 11 A7 --- --- [SWIRE3_] 12- 30 A19 --- SWIRE3 IAU SWIRE3 designation (JHHMMSS.ss+DDMMSS.s) 32- 35 F4.1 mag umag SDSS u magnitude in Vega system 37- 40 F4.1 mag g'mag SDSS g' magnitude in Vega system 42- 45 F4.1 mag r'mag SDSS r' magnitude in Vega system 47- 50 F4.1 mag i'mag SDSS i' magnitude in Vega system 52- 55 F4.1 mag zmag ? SDSS z magnitude in Vega system 57- 60 F4.1 mag Jmag ? 2MASS J magnitude in Vega system 62- 65 F4.1 mag Hmag ? 2MASS H magnitude in Vega system 67- 70 F4.1 mag Kmag ? 2MASS K magnitude in Vega system 72- 75 F4.1 uJy F3.6 IRAC 3.6um flux density 77- 79 F3.1 uJy e_F3.6 rms uncertainty on F3.6 81- 84 F4.1 uJy F4.5 IRAC 4.5um flux density 86- 88 F3.1 uJy e_F4.5 rms uncertainty on F4.5 90- 93 F4.1 uJy F5.8 IRAC 5.8um flux density 95- 97 F3.1 uJy e_F5.8 rms uncertainty on F5.8 99-102 F4.1 uJy F8.0 IRAC 8.0um flux density 104-106 F3.1 uJy e_F8.0 ? rms uncertainty on F8.0 108-112 F5.1 uJy F24 MIPS 24um flux density 114-117 F4.1 uJy e_F24 rms uncertainty on F24
Byte-by-byte Description of file: table4.dat
Bytes Format Units Label Explanations
1 A1 --- q_F1.2mm [ABC] 1.2mm detection code (1) 3- 5 A3 --- Name Sequential number, LNN 7- 10 F4.2 mJy F1.2mm Flux density at 1.2mm (2) 12- 15 F4.2 mJy e_F1.2mm ? rms uncertainty on F1.2mm 17- 21 F5.2 mJy F1.2mmO ? Flux density at 1.2mm, observed value used in stacks 23- 26 F4.2 mJy e_F1.2mmO ? rms uncertainty on F1.2mmO 28- 32 F5.1 uJy F20cm ? Flux density at 20cm (1.4GHz) (3) 34- 37 F4.1 uJy e_F20cm ? rms uncertainty on F20cm (3) 39- 41 I3 mJy F50cm Flux density at 50cm (3(600MHz) ) 43- 44 I2 mJy e_F50cm rms uncertainty on F50cm (3) 46- 49 I4 uJy F90cm ? Flux density at 90cm (330MHz) (3) 51- 52 I2 uJy e_F90cm ? rms uncertainty on F90cm (3) 54- 57 F4.1 arcsec amaj ? Major axis 59- 61 F3.1 arcsec amin ? Minor axis 63- 67 F5.2 --- alpha Spectral index (F(ν)∝να) 68 A1 --- n_alpha [f] α not determined and fixed to -0.64 70- 73 F4.2 --- e_alpha ? rms uncertainty on alpha 75- 78 F4.2 --- q ? Radio-FIR q factor (FIR-to-radio ratio) 80- 83 F4.2 --- E_q ? Error on q (upper limit) 85- 88 F4.2 --- e_q ? Error on q (lower limit)
Note (1): Code is: A = 1.2mm detections S/N>4 B = 1.2mm tentative detections S/N>3 C = Other non detections at 1.2mm Note (2): The limits on F1.2mm are 3σ limits, except for the sources with 1.5<S/N<3 (Det=C) where they are the observed value plus 2σ. Note (3): The radio flux density limits are 3σ limits.
Byte-by-byte Description of file: table5.dat
Bytes Format Units Label Explanations
1- 3 A3 --- Name Sequential number, LNN 5- 8 F4.2 --- zph Photometric redshift 9 A1 --- n_zph [a] a: Spectroscopic redshift from Berta et al. Cat. J/A+A/467/565 11- 14 F4.2 10+24W/Hz L1.4GHz Radio luminosity at 1.4GHz (1) 16- 19 F4.2 10+12Lsun LFIR Far-IR luminosity from millimetric data 21- 24 F4.2 10+12Lsun e_LFIR ? rms uncertainty on LFIRmm 26- 30 F5.2 10+12Lsun LFIRcm Far infrared luminosity from radio data 32- 36 F5.3 10+12Lsun e_LFIRcm rms uncertainty on LFIRradio 37 A1 --- n_LFIRcm [d] Note on LFIRradio (2) 39- 42 I4 Msun/yr SFR Stellar formation rate derived from millimetric data (3) 44- 47 I4 Msun/yr SFR.rad Stellar formation rate derived from radio data (3) 48 A1 --- u_SFR.rad [d] d for dubious values 50- 53 F4.2 10+11Lsun L1.6um νLν(1.6µm) luminosity 55- 58 F4.2 10+11Msun Mass Stellar mass 59 A1 --- u_Mass [d] d for dubious values 61- 71 A11 --- SMG/SFRG Galaxy type (4)
Note (1): The value of L1.4GHz, the rest-frame luminosity at 1.4GHz, is the weighted average of the two determinations of L1.4GHz from 20cm and 50cm flux densities when both are available. Note (2): d: for sources with high 20cm/1.2mm flux densities ratios, the values of LFIR,radio, the infrared SFR derived from the radio flux densities and the stellar mass are dubious. Note (3): SFR calculated by Kennicutt's formula (Eq. (6)) with a Salpeter IMF (see text). The upper limits of LFIR and SFR are 3σ limits, except for the sources with 1.5<S/N<3 where they are the observed value plus 2σ. The upper limits of LFIR,radio and SFRradio are 3σ limits. Note (4): Abbreviations used: SMG = submillimeter galaxies SFRG = submillimetre faint radio galaxies
History: From electronic version of the journal
(End) Patricia Vannier [CDS] 04-Mar-2010
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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