J/MNRAS/468/4006 Proto-cluster candidate fields (Mackenzie+, 2017)
SCUBA-2 follow-up of Herschel-SPIRE observed Planck overdensities.
Mackenzie T.P., Scott D., Bianconi M., Clements D.L., Dole H.A.,
Flores-Cacho I., Guery D., Kneissl R., Lagache G., Marleau F.R.,
Montier L., Nesvadba N.P.H., Pointecouteau E., Soucail G.
<Mon. Not. R. Astron. Soc., 468, 4006-4017 (2017)>
=2017MNRAS.468.4006M 2017MNRAS.468.4006M (SIMBAD/NED BibCode)
ADC_Keywords: Clusters, galaxy ; Redshifts ; Photometry, millimetric/submm
Keywords: galaxies: clusters: general - submillimetre: galaxies
Abstract:
We present SCUBA-2 follow-up of 61 candidate high-redshift Planck
sources. Of these, 10 are confirmed strong gravitational lenses and
comprise some of the brightest such submm sources on the observed sky,
while 51 are candidate proto-cluster fields undergoing massive
starburst events. With the accompanying Herschel-Spectral and
Photometric Imaging Receiver observations and assuming an empirical
dust temperature prior of 34+13-9K, we provide photometric
redshift and far-IR luminosity estimates for 172 SCUBA-2-selected
sources within these Planck overdensity fields. The redshift
distribution of the sources peak between a redshift of 2 and 4, with
one-third of the sources having S500/S350>1. For the majority of
the sources, we find far-IR luminosities of approximately
1013L☉, corresponding to star formation rates of around
1000M☉/yr. For S850>8mJy sources, we show that there is up to
an order of magnitude increase in star formation rate density and an
increase in uncorrected number counts of 6 for S850>8mJy when
compared to typical cosmological survey fields. The sources detected
with SCUBA-2 account for only approximately 5 per cent of the Planck
flux at 353 GHz, and thus many more fainter sources are expected in
these fields.
Description:
Of the 172 SCUBA-2-detected sources, 138 are located within the Planck
beam. Table 1 lists the source positions and flux densities, as well
as constraints on their far-IR luminosities and redshifts.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 94 172 SCUBA-2-detected sources within the Planck
proto-cluster candidate fields
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Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 19 A19 --- Galaxy Galaxy name
21- 22 I2 h RAh Right ascension (J2000)
24- 25 I2 min RAm Right ascension (J2000)
27- 32 F6.3 s RAs Right ascension (J2000)
34 A1 --- DE- Declination sign (J2000)
35- 36 I2 deg DEd Declination (J2000)
38- 39 I2 arcmin DEm Declination (J2000)
41- 45 F5.2 arcsec DEs Declination (J2000)
47- 50 F4.1 mJy S850 Flux density at 850um
52- 54 F3.1 mJy e_S850 Flux density at 850um error (1)
56 A1 --- l_zph Limit flag on zph (2)
57- 59 F3.1 --- zph Photometric redshift
61- 63 F3.1 --- E_zph ? Photometric redshift error (upper value) (3)
65- 67 F3.1 --- e_zph ? Photometric redshift error (lower value) (3)
69- 75 E7.2 [Lsun] LFIR Far-IR luminosity
77- 84 E8.3 [Lsun] E_LFIR ? Far-IR luminosity error (upper value) (3)
86- 92 E7.2 [Lsun] e_LFIR ? Far-IR luminosity error (lower value) (3)
94 A1 --- PLCK? [Y/N] In Planck beam ?
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Note (1): Flux density uncertainties at 850um are instrumental noise only and
do not include confusion noise.
Note (2): Photometric redshift fits for sources with redshifts greater than
about 6.5 are not possible, due to the peak of the SED being located outside
the wavelength coverage. For these sources, we provide the 16th percentile of
the distributions as a 1σ lower confidence limit.
Note (3): We report the median values from the MCMC chains and 68 per cent
confidence intervals for both far-IR luminosities and photometric redshifts.
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 16-Mar-2020