J/A+A/698/A161 Strong lensing model of MACS J0035.4-2015 (Somma+, 2025)
The strong lensing model of MACS J0035.4-2015.
Somma C., Caminha G.B., Suyu S.H.
<Astron. Astrophys. 698, A161 (2025)>
=2025A&A...698A.161S 2025A&A...698A.161S (SIMBAD/NED BibCode)
ADC_Keywords: Gravitational lensing ; Redshifts
Keywords: gravitational lensing: strong -
galaxies: clusters: individual: MACS J0035.4-2015 -
cosmological parameters - cosmology: observations - dark matter -
dark energy
Abstract:
We have used strong gravitational lensing to perform a study of the
mass distribution of the galaxy cluster MACS J0035.4-2015 by modeling
its total mass distribution, and at the same time, constrain the
geometry of the Universe in various cosmological models. The
combination of high-resolution imaging from the Hubble Space Telescope
with ground-based spectroscopy with the Multi Unit Spectroscopic
Explorer mounted at the VLT allows us to model the observed multiple
image positions with ∼0.3" precision. Firstly we found that MACS
J0035.4-2015 can be best described by a combination of an elliptical
dark matter halo as an isothermal mass profile, with the brightest
cluster galaxy and cluster members, each with a spherical truncated
isothermal parameterization. With these assumptions, the total mass is
estimated to be ∼6x1013M☉ within 100kpc. In order to constrain
the background geometry of the Universe, we adopt four different
cosmological models. All of the resulting values of the cosmological
parameters in these cosmological models are statistically consistent
with the flat Lambda CDM model with an estimated value of Ω_m.
By combining the results with five other clusters from previous
studies, we could reduce the uncertainties and obtain a more precise
value of Ω_m. Our results show that cluster strong gravitational
lensing is a formidable probe to be included in future cosmological
surveys.
Description:
Catalogue of spectroscopic redshifts from MUSE observations of MACS
J0035.4-2015. Coordinates are based on HST/RELICS public imaging (Coe
et al., 2019ApJ...884...85C 2019ApJ...884...85C). This table includes all extracted
sources with redshift measurements, redshift quality flags, and
identifiers indicating multiple images of lensed sources.
Objects:
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RA (2000) DE Designation(s)
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00 35 26.50 -20 15 46.0 MACS J0035.4-2015 = MCXC J0035.4-2015
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 59 73 *MUSE redshift catalogue for MACS J0035.4-2015
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Note on table2.dat: Each row corresponds to a spectroscopically confirmed
source.
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 26 A26 --- ID Object identifier: M0035-JHHMMSS.ss+DDMMSS.ss
28- 36 F9.7 deg RAdeg Right Ascension (J2000) (1)
38- 48 F11.7 deg DEdeg Declination (J2000) (1)
50- 55 F6.4 --- zs Spectroscopic redshift
57 I1 --- q_zs [2/9] Redshift quality flag (2)
59 I1 --- Multi Number of multiple images with spectroscopic
redshift for this object (3)
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Note (1): The coordinates are calibrated against the HST/RELICS dataset
(Coe et al., 2019ApJ...884...85C 2019ApJ...884...85C, Cat. J/ApJ/884/85).
Note (2): Redshift quality flag as follows:
2 = likely
3 = secure
9 = single line
4 = field star
Note (3): The "Multi" column helps identify multiply-lensed background sources.
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Acknowledgements:
Chitsanupong Somma, chitsanupongsomma(at)googlemail.com
(End) Patricia Vannier [CDS] 23-May-2025