A Spectroscopic View of the JWST/GTO Strong Lensing Cluster A1489

Rines, Kenneth J.; Sohn, Jubee; Geller, Margaret J.; Diaferio, Antonaldo

doi:10.3847/1538-4357/ac67a8

Cited by 3 publications

(1 citation statement)

References 67 publications

(118 reference statements)

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“…Galaxy clusters contain hundreds of galaxies and X-ray emitting hot intracluster plasma, but their mass budget is dominated by dark matter. The mass distribution within a galaxy cluster can be measured through several physical processes such as kinematics of member galaxies (e.g., Saro et al 2013;Rines et al 2022), the hydrodynamics of the hot X-ray gas (e.g., Vikhlinin et al 2009;Ettori et al 2013), and gravitational lensing.…”

Section: Introductionmentioning

confidence: 99%

An excursion into the core of the cluster lens Abell 1689

Ghosh¹,

Adams²,

Williams³

et al. 2022

Preprint

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Abell 1689 is a well studied cluster of galaxies and one of the largest gravitational lens systems ever observed. We have obtained a reconstruction of the cluster Abell 1689 using G , a free-form lens inversion method that relies exclusively on the multiple image data. Non-inclusion of any data related to cluster member galaxies ensures an unbiased measure of the mass distribution, which is the most notable feature of this method. We used two different sets of multiply lensed systems from the available strong lensing data -one containing only the secure systems (107 images), and the other containing all available systems, only excluding some very non-secure systems (151 images). Both the reconstructions produced similar mass distributions whose circularly symmetric radial profiles are well fit with the Navarro-Frenk-White (NFW) profile with concentration parameter values, 𝑐 ∼ 6.8. For the very well-constrained central ∼100 kpc region of the cluster we made detailed comparison of the G reconstructed lensing mass and stellar mass retrieved by the Spectral Energy Distribution (SED) fitting software ++. We found an offset in the light peak of the Brightest Cluster Galaxy (BCG) and its associated lensing mass peak, of about 10 kpc. We also found a light-unaccompanied mass peak in this region, whose location agrees with features retrieved by some of the earlier reconstructions using different methodologies. Both the light-unaccompanied mass peak and the BCG offset are consistent with dark matter self-interaction cross-section 𝜎 1cm 2 /g, while the mass peak is in tension with larger cross-sections.

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Section: Introductionmentioning

confidence: 99%

An excursion into the core of the cluster lens Abell 1689

Ghosh¹,

Adams²,

Williams³

et al. 2022

Preprint

View full text Add to dashboard Cite

show abstract

An excursion into the core of the cluster lens Abell 1689

Ghosh,

Adams,

Williams

et al. 2023

Monthly Notices of the Royal Astronomical Society

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Abell 1689 is a well studied cluster of galaxies and one of the largest gravitational lens systems ever observed. We have obtained a reconstruction of the cluster Abell 1689 using grale, a free-form lens inversion method that relies exclusively on the multiple image data. Non-inclusion of any data related to cluster member galaxies ensures an unbiased measure of the mass distribution, which is the most notable feature of free-form methods like grale. We used two different sets of multiple image systems from the available strong lensing data - one containing only the secure systems (107 images), and the other containing all available systems, only excluding some very non-secure systems (151 images). For the very well-constrained central ∼100 kpc region of the cluster we made detailed comparison of the grale reconstructed lensing mass and stellar mass retrieved by the Spectral Energy Distribution (SED) fitting software fast++. We found a light-unaccompanied mass peak in this region, whose existence, while tentative, is favored by the distribution of nearby images that are local maxima in the Fermat potential. However, further tests, using different methodologies are needed to confirm the reality of this feature. If it shown to be real, this light-unaccompanied mass peak is consistent with dark matter self-interaction cross-section σ ≲ 1cm2/g, while being in tension with larger cross-sections.

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Redshift Survey of 12 Moderate-redshift Clusters

Rines

Geller

2022

Res. Notes AAS

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We conducted a redshift survey of 12 X-ray selected clusters in the redshift range z = 0.35–0.50 with MMT/Hectospec. The redshift surveys confirm that these clusters are massive systems. There are no massive groups or clusters projected along the line of sight that might contaminate the observed cluster X-ray properties significantly. We identify 25–79 members per cluster and refine the estimates of each cluster’s mean redshift. We include the 8004 new redshifts in Data Behind the Figure.

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A Spectroscopic View of the JWST/GTO Strong Lensing Cluster A1489

Cited by 3 publications

References 67 publications

An excursion into the core of the cluster lens Abell 1689

An excursion into the core of the cluster lens Abell 1689

An excursion into the core of the cluster lens Abell 1689

Redshift Survey of 12 Moderate-redshift Clusters

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