J/A+A/614/A118 NIKA Sunyaev-Zel'dovich data release (Adam+, 2018)
Substructure and merger detection in resolved NIKA Sunyaev-Zel'dovich images
of distant clusters.
Adam R., Hahn O., Ruppin F., Ade P., Andre P., Arnaud M., Bartalucci I.,
Beelen A., Benoit A., Bideaud A., Billot N., Bourrion O., Calvo M.,
Catalano A., Coiffard G., Comis B., D'Addabbo A., Desert F.-X., Doyle S.,
Ferrari C., Goupy J., Kramer C., Lagache G., Leclercq S., Lestrade J.-F.,
Macias-Perez J.F., Martinez Aviles G., Martizzi D., Maurogordato S.,
Mauskopf P., Mayet F., Monfardini A., Pajot F., Pascale E., Perotto L.,
Pisano G., Pointecouteau E., Ponthieu N., Pratt G.W., Reveret V., Ricci M.,
Ritacco A., Rodriguez L., Romero C., Roussel H., Schuster K., Sievers A.,
Triqueneaux S., Tucker C., Wu H.-Y., Zylka R.
<Astron. Astrophys. 614, A118 (2018)>
=2018A&A...614A.118A 2018A&A...614A.118A (SIMBAD/NED BibCode)
ADC_Keywords: Clusters, galaxy ; Radio continuum
Keywords: techniques: high angular resolution - techniques: image processing -
galaxies: clusters: intracluster medium -
large-scale structure of Universe
Abstract:
Substructures in the hot gas atmosphere of galaxy clusters are related
to their formation history and to the astrophysical processes at play
in the intracluster medium (ICM). The thermal Sunyaev-Zel'dovich (tSZ)
effect is directly sensitive to the line-of-sight integrated ICM
pressure, and is thus particularly adapted to study ICM substructures.
In this paper, we apply structure-enhancement filtering algorithms to
high-resolution tSZ observations (e.g., NIKA) of distant clusters in
order to search for pressure discontinuities, compressions, and
secondary peaks in the ICM. The same filters are applied to toy-model
images and to synthetic tSZ images extracted from RHAPSODY-G
cosmological hydrodynamic simulations, in order to better interpret
the extracted features. We also study the noise propagation through
the filters and quantify the impact of systematic effects, such as
data-processing-induced artifacts and point-source residuals, the
latter being identified as the dominant potential contaminant. In
three of our six NIKA-observed clusters we identify features at high
signal-to-noise ratio that show clear evidence for merger events. In
MACS J0717.5+3745 (z=0.55), three strong pressure gradients are
observed on the east, southeast, and west sectors, and two main peaks
in the pressure distribution are identified. We observe a lack of tSZ
compact structure in the cool-core cluster PSZ1 G045.85+57.71
(z=0.61), and a tSZ gradient ridge dominates in the southeast. In the
highest redshift cluster, CL J1226.9+3332 (z=0.89), we detect a ridge
pressure gradient of ∼45-arcsec (360kpc) in length associated with a
secondary pressure peak in the west region. Our results show that
current tSZ facilities have now reached the angular resolution and
sensitivity to allow an exploration of the details of pressure
substructures in clusters, even at high redshift. This opens the
possibility to quantify the impact of the dynamical state on the
relation between the tSZ signal and the mass of clusters, which is
important when using tSZ clusters to test cosmological models. This
work also marks the first NIKA cluster sample data release.
Description:
The surface brightness maps of the 6 clusters obtained with NIKA at
the IRAM 30-meter telescope at 150 GHz are presented together with the
necessary data products to use them. They were obtained between
November 2012 and February 2015. In the case of the cluster RX
J1347.5-1145, the map can only be used qualitatively and the extra
data products do not apply. The 150GHz bandpass is provided. The
maps FWHM angular resolution is 18.2" and we provide the beam
profile. Due to the scanning strategy, the noise rms is relatively
constant in the central 80" radius but rapidly increase towards the
edge. Noise Monte Carlo realization are provided to address the noise
properties. Scales larger than 2' are filtered during the data
reduction and the corresponding transfer functions are is provided.
The clusters fields are contaminated by point sources and we provide
best-fit point source models. The cluster MACS J0717.5+3745 is
affected by kinetic SZ signal and we provide a best-fit model to
correct for it. The image coordinates can be found in the FITS header.
Units are mJy/beam. More information can be obtained via
http://lpsc.in2p3.fr/NIKA2LPSZ/nika2sz.release.php.
Objects:
------------------------------------------------------------------------
RA (ICRS) DE Designation(s)
------------------------------------------------------------------------
12 26 57.7 +33 32 50 CL J1226.9+3332 = ClG J1226+3332
07 17 36.50 +37 45 23.0 MACS J0717.5+3745 = ClG J0717+3745
14 23 47.7 +24 04 40 MACS J1423.8+2404 = ClG J1423+2404
15 18 19.2 +29 27 24 PSZ1 G045.85+57.71 = PSZ1 G045.85+57.71
17 17 00.3 +24 04 25 PSZ1 G046.13+30.75 = PSZ1 G046.13+30.75
13 47 33.5 -11 45 42 RX J1347.5-1145 = ClG J1347-1145
------------------------------------------------------------------------
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
list.dat 174 18 List of fits images
fits/* . 18 Individual fits images
beam.dat 32 101 150GHz beam (Beam150GHz.fits)
bandpass.dat 18 170 150GHz bandpass (BandPass150GHz.fits)
ftclj.dat 24 76 *Transfer function of CLJ1226.9+3332 at 150GHz
(TransferFunction150GHz_CLJ1227.fits)
ftmacs07.dat 24 76 *Transfer function of MACSJ0717.5+3745 at 150GHz
(TransferFunction150GHz_MACSJ0717.fits)
ftmacs14.dat 24 76 *Transfer function of MACS J1423.8+2404 at 150GHz
(TransferFunction150GHz_MACSJ1424.fits)
ftpsz045.dat 24 76 *Transfer function of PSZ1 G045.85+57.71 at 150GHz
(TransferFunction150GHz_PSZ1G045.fits)
ftpsz046.dat 24 76 *Transfer function of PSZ1 G046.13+30.75 at 150GHz
TransferFunction150GHz_PSZ1G046.fits)
files/* . 7 Beam, bandpass and transfer functions files
in fits format
--------------------------------------------------------------------------------
Note on ft*: RESOINIARCSEC=2.0000016 and NSIDE_INI=151.
--------------------------------------------------------------------------------
See also:
J/A+A/576/A12 : NIKA maps of ClG J1226.9+3332 at 150 and 250GHz (Adam+, 2015)
http://lpsc.in2p3.fr/NIKA2LPSZ/nika2sz.release.php : Explanatory supplement
Byte-by-byte Description of file: list.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 9 F9.5 deg RAdeg Right Ascension of center (J2000)
10- 18 F9.5 deg DEdeg Declination of center (J2000)
20- 22 I3 --- Nx Number of pixels along X-axis
24- 26 I3 --- Ny Number of pixels along Y-axis
28- 30 I3 Kibyte size Size of FITS file
32- 68 A37 --- FileName Name of FITS file, in subdirectory fits
70-174 A105 --- Title Title of the FITS file
--------------------------------------------------------------------------------
Byte-by-byte Description of file: beam.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 9 F9.5 arcsec Radius ?=- Radius (RADIUS_ARCSEC)
11- 21 F11.8 --- Beam ?=- Beam (BEAM)
23- 32 F10.8 --- e_Beam ?=- Beam error (BEAM_ERROR)
--------------------------------------------------------------------------------
Byte-by-byte Description of file: bandpass.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 9 F9.5 GHz Freq Frequency (FREQ_GHZ)
11- 18 F8.6 --- Trans ?=0 Transmission (TRANSMISSION)
--------------------------------------------------------------------------------
Byte-by-byte Description of file: ft*.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 8 F8.6 arcsec Wave Wave number (WAVENUMBERARCSEC)
10- 16 F7.5 --- TF Transfer function (TF)
18- 24 F7.5 --- e_TF Error on TF (TF_ERR)
--------------------------------------------------------------------------------
Acknowledgements:
Remi Adam, remi.adam(at)oca.eu
References:
Explanatory supplement at
http://lpsc.in2p3.fr/NIKA2LPSZ/nika2sz.release.php
R. Adam, O. Hahn, F. Ruppin et al. (2017), submitted to A&A
Sub-structure and merger detection in resolved NIKA Sunyaev-Zel'dovich
images of distant clusters
C. Romero, M. McWilliam, J. F. Macedas-Perez et al. (2017), A&A,
in-press, arXiv:1707.06113
A multi-instrument non-parametric reconstruction of the electron
pressure profile in the galaxy cluster CLJ1226.9+3332
R. Adam, M. Arnaud, I. Bartalucci et al. (2017A&A...606A..64A 2017A&A...606A..64A),
arXiv:1706.10230
Mapping the hot gas temperature in galaxy clusters using X-ray and
Sunyaev-Zel'dovich imaging
F. Ruppin, R. Adam, B. Comis et al. (2017A&A...597A.110R 2017A&A...597A.110R),
arXiv:1607.07679
Non parametric deprojection of NIKA SZ observations: pressure distribution
in the Planck-discovered cluster PSZ1 G045.85+57.71
R. Adam, I. Bartalucci, G. W. Pratt et al. (2017A&A...598A.115A 2017A&A...598A.115A),
arXiv:1606.07721
Mapping the kinetic Sunyaev-Zel'dovich effect toward MACS J0717.5+3745
with NIKA
R. Adam, B. Comis, I. Bartalucci et al. (2016A&A...586A.122A 2016A&A...586A.122A),
arXiv:1510.06674
High angular resolution Sunyaev-Zel'dovich observations of MACS J1423.8+2404
with NIKA: multi-wavelength analysis
R. Adam (2015), Ph.D. thesis, https://tel.archives-ouvertes.fr/tel-01303736
Observation des amas de galaxies par effet Sunyaev-Zel'dovich et de la
polarisation du fond diffus cosmologique : de Planck a NIKA
R. Adam, B. Comis, J. F. Macedas-Perez et al. (2015A&A...576A..12A 2015A&A...576A..12A,
Cat. J/A+A/576/A12), 1410.2808
Pressure distribution of the high-redshift cluster of galaxies
CL J1226.9+3332 with NIKA
A. Catalano, M. Calvo, N. Ponthieu, R. Adam et al. (2014A&A...569A...9C 2014A&A...569A...9C),
1402.0260
Performance and calibration of the NIKA camera at the IRAM 30m telescope
R. Adam, B. Comis, J. F. Macedas-Perez et al. (2014A&A...569A..66A 2014A&A...569A..66A),
1310.6237
First observation of the thermal Sunyaev-Zel'dovich effect with kinetic
inductance detectors
(End) Patricia Vannier [CDS] 28-Dec-2017