J/A+A/674/A79 MACS J0416.1-2403 spectroscopic multiple images (Bergamini+, 2023)
A state-of-the-art strong lensing model of MACS J0416.1-2403 with the largest
sample of spectroscopic multiple images.
Bergamini P., Grillo C., Rosati P., Vanzella E., Mestric U., Mercurio A.,
Acebron A., Caminha G.B., Granata G., Meneghetti M., Angora G., Nonino M.
<Astron. Astrophys. 674, A79 (2023)>
=2023A&A...674A..79B 2023A&A...674A..79B (SIMBAD/NED BibCode)
ADC_Keywords: Clusters, galaxy ; Gravitational lensing ; Redshifts
Keywords: gravitational lensing: strong - galaxies: clusters: general -
dark matter - cosmology: observations -
galaxies: clusters: individual: MACS J0416.1-2403
Abstract:
The combination of multi-band imaging from the Hubble Space Telescope
with Multi-Unit Spectroscopic Explorer integral field spectroscopy,
obtained at the Very Large Telescope, has recently driven remarkable
progress in strong lensing (SL) modeling of galaxy clusters. From a
few tens of multiple images with photometric redshifts per cluster, a
new generation of high-precision SL models have recently been
developed, by exploiting in some cases over a hundred of
spectroscopically confirmed multiple images and cluster member
galaxies. A further step forward is expected with James Webb Space
Telescope observations of SL clusters (from hundreds to possibly a
thousand of multiple images). In this context, we present a new,
state-of-the-art SL model of the galaxy cluster MACS J0416.1-2403,
utilizing 237 spectroscopically confirmed multiple images, which is
the largest sample of secure multiply lensed sources utilized to date.
In addition, this model incorporates stellar kinematics information of
64 cluster galaxies and the hot-gas mass distribution of the cluster,
determined from Chandra X-ray observations. The observed positions of
the many multiple images are reproduced with a remarkable average
accuracy of 0.43". To further assess the reliability of this lens
model and to highlight the improvement over previously published
models, we show the extended surface brightness reconstruction of
several lensed galaxies through a newly developed forward modeling
software. The comparison with other SL models of the same cluster
demonstrates that this new model is better suited to accurately
reproduce the positions, shapes and fluxes of the observed multiple
images. Besides a robust characterization of the total mass
distribution of the cluster, our model can provide accurate and
precise magnification maps that are key to studying the intrinsic
physical properties of faint, high-redshift lensed sources. The model
is made publicly available through our newly developed Strong Lensing
Online Tool (or SLOT), that thank to a simple graphical interface
allows astronomers (including lensing non-experts) to take full
advantage of the predictive power of the model, including statistical
uncertainties on the relevant quantities associated to the multiply
lensed sources.
Description:
Catalog of the 237 secure multiple images used as constraints in the
new high-precision strong lensing model of the galaxy cluster
MACS J0416.1-2403.
Objects:
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RA (2000) DE Designation(s)
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04 16 08.37 -24 04 20.8 MACS J0416.1-2403 = 1RXS J041609.9-240358
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablea1.dat 37 237 MACS J0416.1-2403 secure multiple images
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See also:
J/A+A/646/A83 : 12 massive lensing clusters MUSE observations (Richard+, 2021)
Byte-by-byte Description of file: tablea1.dat
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Bytes Format Units Label Explanations
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1- 6 A6 --- ID Multiple image ID
8- 10 A3 --- Comment [abcd- ] Multiple image description (1)
12- 20 F9.6 deg RAdeg Right ascension (J2000.0)
22- 31 F10.6 deg DEdeg Declination (J2000.0)
33- 37 F5.3 --- zsp Source redshift
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Note (1): Comments as discussed in Section 3.1 and shown in Figure 11 of the
presented paper, as follows:
a = images that are new with respect to Bergamini et al.
(2021A&A...645A.140B 2021A&A...645A.140B or 2021A&A...648A.123B 2021A&A...648A.123B)
b = new images that were not included in the Richard et al.
(2021A&A...646A..83R 2021A&A...646A..83R, Cat. J/A+A/646/A83) lens catalog
c = images in common with Richard et al. (2021A&A...646A..83R 2021A&A...646A..83R,
Cat. J/A+A/646/A83) for which we revisited the redshift measurement
d = images of Sys16 with corrected positions and associations with respect to
Bergamini et al. (2021A&A...645A.140B 2021A&A...645A.140B or 2021A&A...648A.123B 2021A&A...648A.123B)
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Acknowledgements:
Pietro Bergamini, pietro.bergamini(at)unimi.it
(End) Patricia Vannier [CDS] 08-Mar-2023