J/MNRAS/479/4577 AzTEC 1.1mm observations of 17 radio sources (Zeballos+, 2018)
AzTEC 1.1 mm observations of high-z protocluster environments:
SMG overdensities and misalignment between AGN jets and SMG distribution.
Zeballos M., Aretxaga I., Hughes D.H., Humphrey A., Wilson G.W.,
Austermann J., Dunlop J.S., Ezawa H., Ferrusca D., Hatsukade B.,
Ivison R.J., Kawabe R., Kim S., Kodama T., Kohno K., Montana A.,
Nakanishi K., Plionis M., Sanchez-Arguelles D., Stevens J.A., Tamura Y.,
Velazquez M., Yun M.S.
<Mon. Not. R. Astron. Soc., 479, 4577-4632 (2018)>
=2018MNRAS.479.4577Z 2018MNRAS.479.4577Z (SIMBAD/NED BibCode)
ADC_Keywords: Galaxies ; Active gal. nuclei ; Photometry, millimetric/submm ;
Radio sources
Keywords: galaxies: active - galaxies: evolution - galaxies: starburst -
submillimetre: galaxies
Abstract:
We present observations at 1.1mm towards 16 powerful radio galaxies
and a radio-quiet quasar at 0.5<z<6.3 acquired with the AzTEC camera
mounted at the James Clerk Maxwell Telescope and Atacama Submillimeter
Telescope Experiment to study the spatial distribution of
submillimetre galaxies (SMGs) towards possible protocluster regions.
The survey covers a total area of 1.01 sq deg with rms depths of
0.52-1.44mJy and detects 728 sources above 3σ. We find
overdensities of a factor of ∼2 in the source counts of three
individual fields (4C+23.56, PKS1138-262, and MRC0355-037) over areas
of ∼200 sq deg. When combining all fields, the source-count analysis
finds an overdensity that reaches a factor ≳3 at S1.1mm≥4mJy
covering a 1.5-arcmin-radius area centred on the active galactic
nucleus. The large size of our maps allows us to establish that beyond
a radius of 1.5 arcmin, the radial surface density of SMGs falls to
that of a blank field. In addition, we find a trend for SMGs to align
closely to a perpendicular direction with respect to the radio jets of
the powerful central radio galaxies (73-14+13deg). This
misalignment is found over projected comoving scales of 4-20Mpc,
departs from perfect alignment (0 deg) by ∼5σ, and apparently
has no dependence on SMG luminosity. Under the assumption that the
AzTEC sources are at the redshift of the central radio galaxy, the
misalignment reported here can be interpreted as SMGs preferentially
inhabiting mass-dominant filaments funnelling material towards the
protoclusters, which are also the parent structures of the radio
galaxies.
Description:
We targeted fields centred on luminous AGN at 0.5<z<6.3 which were
known or suspected to be hosted by massive galaxies, as potential
signposts of high-redshift overdensities.
The ACES protocluster sample was surveyed at a wavelength of 1.1mm
with the AzTEC camera as a visiting instrument at the 15-m James Clerk
Maxwell Telescope (JCMT;FWHM=18arcsec) in Hawaii and at the 10-m
Atacama Submillimeter Telescope Experiment (ASTE; FWHM=30arcsec) in
the northern part of Chile. The field towards 4C+41.17 was observed at
the JCMT in 2005 December, and the other 16 fields were observed at
the ASTE from 2007 May to October and 2008 July to December.
Table 3 shows the source catalogue for the PKS1138-262 field. This
list is in decreasing order of S/N and includes the measured 1.1mm
flux densities and their deboosted fluxes. Tables A1 to A16 show the
catalogues for the other ACES protoclusters.
Objects:
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RA (J2000) DE Designation(s)
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10 30 27.10 +05 24 55.0 SDSSJ1030+0524 = SDSS J103027.09+052455.0
09 24 19.91 -22 01 41.5 TNJ0924-2201 = [DVR2000] TN J0924-2201
13 38 26.23 -19 42 33.6 TNJ1338-1942 = [DVR2000] TN J1338-1942
20 07 53.22 -13 16 43.4 TNJ2007-1316 = [DVR2000] TN J2007-1316
06 50 52.35 +41 30 31.4 4C+41.17 = 4C+41.17
20 09 48.08 -30 40 07.4 TNJ2009-3040 = [DVR2000] TN J2009-3040
03 18 12.14 -25 35 10.2 MRC0316-257 = MRC0316-257
05 30 25.43 -54 54 23.3 PKS0529-549 = PKS0529-549
21 06 58 27 -24 05 09.1 MRC2104-242 = MRC2104-242
21 07 14.82 +23 31 45.1 4C+23.56 = 4C+23.56
11 40 48.35 -26 29 08.6 PKS1138-262 = PKS1138-262
03 57 48.06 -03 34 09.5 MRC0355-037 = MRC0355-037
20 51 03.49 -27 03 03.7 MRC2048-272 = MRC2048-272
23 25 10.23 -03 44 46.7 TXS2322-040 = Gopal 2322-040
23 25 19.62 -04 57 36.6 MRC2322-052 = MRC2322-052
20 11 14.22 -06 44 03.6 MRC2008-068 = MRC2008-068
22 05 04.83 -55 17 44.0 MRC2201-555 = MRC2201-555
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File Summary:
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FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table3.dat 59 47 AzTEC source catalogue for the field of
PKS1138-262
tablea1.dat 59 64 SDSSJ1030+0524 AzTEC source catalogue
tablea2.dat 59 37 TNJ0924-2201 AzTEC source catalogue
tablea3.dat 59 12 TNJ1338-1942 AzTEC source catalogue
tablea4.dat 59 30 TNJ2007-1316 AzTEC source catalogue
tablea5.dat 59 51 4C+41.17 AzTEC source catalogue
tablea6.dat 59 33 TNJ2009-3040 AzTEC source catalogue
tablea7.dat 59 43 MRC0316-257 AzTEC source catalogue
tablea8.dat 59 55 PKS0529-549 AzTEC source catalogue
tablea9.dat 59 38 MRC2104-242 AzTEC source catalogue
tablea10.dat 59 51 4C+23.56 AzTEC source catalogue
tablea11.dat 59 61 MRC0355-037 AzTEC source catalogue
tablea12.dat 59 31 MRC2048-272 AzTEC source catalogue
tablea13.dat 59 55 TXS2322-040 AzTEC source catalogue
tablea14.dat 59 44 MRC2322-052 AzTEC source catalogue
tablea15.dat 59 41 MRC2008-068 AzTEC source catalogue
tablea16.dat 59 35 MRC2201-555 AzTEC source catalogue
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Byte-by-byte Description of file: table*.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- ID Source ID within the table
4- 25 A22 --- IAUname Source name
27- 31 F5.2 --- S/N Signal to noise ratio (1)
33- 36 F4.1 mJy S Measured 1.1mm flux density
38- 40 F3.1 mJy e_S Measured 1.1mm flux density error
42- 45 F4.1 mJy Sdeb Deboosted 1.1mm flux density
47- 49 F3.1 mJy E_Sdeb Upper 68% confidence interval in Sdeb
51- 53 F3.1 mJy e_Sdeb Lower 68% confidence interval in Sdeb
55- 59 F5.3 --- P<0 Probability for the source to have a negative
deboosted flux
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Note (1): The catalogue is limited to sources detected at an S/N>3 within
50 per cent coverage region of the AzTEC map
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History:
From electronic version of the journal
(End) Ana Fiallos [CDS] 06-May-2022