J/A+A/597/A41 ALMA Frontier Fields Survey. I. (Gonzalez-Lopez+, 2017)
The ALMA Frontier Fields Survey.
I. 1.1 mm continuum detections in Abell 2744, MACS J0416.1-2403 and
MACS J1149.5+2223.
Gonzalez-Lopez J., Bauer F.E., Romero-Canizales C., Kneissl R.,
Villard E., Carvajal R., Kim S., Laporte N., Anguita T., Aravena M.,
Bouwens R.J., Bradley L., Carrasco M., Demarco R., Ford H., Ibar E.,
Infante L., Messias H., Munoz Arancibia A. M., Nagar N., Padilla N.,
Treister E., Troncoso P., Zitrin A.
<Astron. Astrophys. 597, A41 (2017)>
=2017A&A...597A..41G 2017A&A...597A..41G (SIMBAD/NED BibCode)
ADC_Keywords: Galaxies, radio ; Interferometry ; Radio continuum
Keywords: gravitational lensing: strong - galaxies: high-redshift -
submillimeter: galaxies
Abstract:
Dusty star-forming galaxies are among the most prodigious systems at
high redshift (z>1), characterized by high star-formation rates and
huge dust reservoirs. The bright end of this population has been well
characterized in recent years, but considerable uncertainties remain
for fainter dusty star-forming galaxies, which are responsible for the
bulk of star formation at high redshift and thus play a key role in
galaxy growth and evolution.
In this first paper of our series, we describe our methods for finding
high redshift faint dusty galaxies using millimeter observations with
ALMA.
We obtained ALMA 1.1mm mosaic images for three strong-lensing
galaxy clusters from the Frontier Fields Survey, which constitute some
of the best studied gravitational lenses to date. The
∼2'x2' mosaics overlap with the deep HST WFC3/IR footprints and
encompass the high magnification regions of each cluster for maximum
intrinsic source sensitivity. The combination of extremely high ALMA
sensitivity and the magnification power of these clusters allows us to
systematically probe the sub-mJy population of dusty star-forming
galaxies over a large surveyed area.
We present a description of the reduction and analysis of the ALMA
continuum observations for the galaxy clusters Abell 2744 (z=0.308),
MACS J0416.1-2403 (z=0.396) and MACS J1149.5+2223 (z=0.543),
for which we reach observed rms sensitivities of 55, 59 and 71uJy/beam
respectively. We detect 12 dusty star-forming galaxies at S/N≥5.0
across the three clusters, all of them presenting coincidence with
near-infrared detected counterparts in the HST images. None of the
sources fall close to the lensing caustics, thus they are not strongly
lensed. The observed 1.1mm flux densities for the total sample of
galaxies range from 0.41 to 2.82mJy, with observed effective radii
spanning ≲0.05" to 0.37"±0.21". The lensing-corrected sizes
of the detected sources appear to be in the same range as those
measured in brighter samples, albeit with possibly larger dispersion.
Description:
Tables presenting detection properties of mm sources behind the 3
Frontier Fields Abell 2744, MACSJ0416.1-2403 and MACSJ1149.5+2223.
We present the properties of the detected sources in the ALMA
observations. We also present the intrinsic properties of the sources
in the image plane as well as the separations to the optical
counterpart.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 68 12 ALMA detections
table4.dat 60 12 Flux density estimates
table5.dat 94 12 Source parameters and magnification properties
table6.dat 76 12 Counterpart galaxies separation properties
list.dat 145 6 List of fitsd images
fits/* . 6 Individual fits images
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See also:
J/MNRAS/443/1549 : MACSJ0416.1-2403 strong-lensing analysis (Jauzac+, 2014)
J/MNRAS/444/268 : HST Frontier Fields clusters (Richard+, 2014)
J/ApJS/211/21 : Spectroscopic redshifts of galaxies in MACS (Ebeling+, 2014)
J/ApJ/800/18 : HST/WFC3 obs. of z∼7-8 galaxies in A2744 (Atek+, 2015)
J/ApJ/811/29 : GLASS. IV. Lensing cluster Abell 2744 (Wang+, 2015)
J/MNRAS/452/1437 : Abell 2744 strong-lensing analysis (Jauzac+, 2015)
J/ApJS/224/33 : CLASH-VLT: the FF cluster MACSJ0416.1-2403 (Balestra+, 2016)
J/A+A/590/A31 : ASTRODEEP Frontier Fields Catalogues (Merlin+, 2016)
Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 14 A14 --- ID Source ID (Cluster-IDNN)
16- 17 I2 h RAh Centroid right ascension (J2000)
19- 20 I2 min RAm Centroid right ascension (J2000)
22- 26 F5.2 s RAs Centroid right ascension (J2000)
28 A1 --- DE- Centroid declination sign (J2000)
29- 30 I2 deg DEd Centroid declination sign (J2000)
32- 33 I2 arcmin DEm Centroid declination sign (J2000)
35- 39 F5.2 arcsec DEs Centroid declination sign (J2000)
41- 45 F5.3 arcsec e_RAs Positional error of RA
47- 51 F5.3 arcsec e_DEs Positional error of DE
53- 56 F4.1 --- SN Detection signal-to-noise
58- 62 F5.3 mJy/beam Speak Peak intensity per beam at 1.1mm
64- 68 F5.3 mJy/beam e_Speak 1 sigma error of peak intensity
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 14 A14 --- ID Source ID (Cluster-IDNN)
16- 20 F5.3 mJy FPs Integrated flux density at 1.1mm assuming a
PS model
22- 26 F5.3 mJy e_FPs 1 sigma error of FPs
28- 32 F5.3 mJy FExt Integrated flux density at 1.1mm assuming a
6-parameter extended Gaussian model (EXT)
34- 38 F5.3 mJy e_FExt 1 sigma error of FExt
40- 43 F4.1 --- Chi2Ps Reduced chi2/DOF for PS model
45- 48 F4.1 --- Chi2Ext Reduced chi2/DOF for EXT model
50- 54 F5.3 mJy FuvFit Integrated flux density at 1.1mm using UV-FIT
56- 60 F5.3 mJy e_FuvFit 1 sigma error of FuvFit
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Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1- 14 A14 --- ID Source ID (Cluster-IDNN)
16- 19 F4.2 arcsec rs Effective radius
21- 24 F4.2 arcsec e_rs Effective radius error
26- 29 F4.2 --- q The axial ratio
31- 34 F4.2 --- e_q The axial ratio error
36- 38 I3 deg phi The position angle in degrees east of north
40- 41 I2 deg e_phi The position angle error
43- 45 F3.1 --- mu Magnification value
48- 50 F3.1 --- E_mu Magnification value positive error
53- 55 F3.1 --- e_mu Magnification value negative error
57- 60 F4.2 arcsec rsmu Demagnified effective radius
63- 66 F4.2 arcsec E_rsmu Demagnified effective radius positive error
69- 72 F4.2 arcsec e_rsmu Demagnified effective radius negative error
74- 78 F5.3 mJy Fuvmu Demagnified flux density
81- 85 F5.3 mJy E_Fuvmu Demagnified flux density positive error
88- 92 F5.3 mJy e_Fuvmu Demagnified flux density negative error
94 I1 --- Ext [0/2] Extended emission classification (1)
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Note (1): Extended emission classification as follows:
0 = point-like
1 = marginally extended
2 = significantly extended.
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Byte-by-byte Description of file: table6.dat
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Bytes Format Units Label Explanations
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1- 14 A14 --- ID Source ID (Cluster-IDNN)
16- 17 I2 h RAh Centroid right ascension for NIR
counterpart (J2000)
19- 20 I2 min RAm Centroid right ascension for NIR
counterpart (J2000)
22- 28 F7.4 s RAs Centroid right ascension for NIR
counterpart (J2000)
30 A1 --- DE- Centroid declination sign for NIR
counterpart (J2000)
31- 32 I2 deg DEd Centroid declination for NIR
counterpart (J2000)
34- 35 I2 arcmin DEm Centroid declination for NIR
counterpart (J2000)
37- 43 F7.4 arcsec DEs Centroid declination for NIR
counterpart (J2000)
45- 49 F5.3 arcsec e_RAs Positional error of RA for NIR counterpart
52- 56 F5.3 arcsec e_DEs Positional error of DEC for NIR counterpart
58- 61 F4.2 arcsec Ipoff Offset measured in the image plane
63- 66 F4.2 arcsec e_Ipoff Offset measured in the image plane error
68- 71 F4.2 arcsec Spoff Offset measured in the source plane error
73- 76 F4.2 arcsec e_Spoff Offset measured in the source plane error
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Byte-by-byte Description of file: list.dat
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Bytes Format Units Label Explanations
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1- 9 F9.5 deg RAdeg Right Ascension of center (J2000)
10- 18 F9.5 deg DEdeg Declination of center (J2000)
20- 23 I4 --- Nx Number of pixels along X-axis
25- 28 I4 --- Ny Number of pixels along Y-axis
30- 55 A26 --- Obs.Date Observation date (YYYY-MM-DDThh:mm:ss.ssssss)
57- 63 F7.3 GHz Freq Observed frequency
65- 69 I5 Kibyte size Size of FITS file
71-103 A33 --- FileName Name of FITS file, in subdirectory fits
105-145 A41 --- Title Title of the FITS file
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Acknowledgements:
Jorge Gonzalez Lopez, jgonzal(at)astro.puc.cl
(End) Jorge Gonzalez Lopez [PUC], Patricia Vannier [CDS] 31-Oct-2016