The Halos of Satellite Galaxies: the Companion of the Massive Elliptical Lens SL2S J08544-0121

Aleksi Halkola; Sherry H. Suyu

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The Halos of Satellite Galaxies: the Companion of the Massive Elliptical Lens SL2S J08544-0121

Sherry H. Suyu, Aleksi Halkola

Cosmology and Nongalactic Astrophysics · Submitted 27 Jul 2010

abstract compiled · 2026-09-23 · no language-model review

The authors' main claim Our measurement of the halo size is compatible with the estimated tidal radius of the satellite galaxy, suggesting that halos of galaxies in groups experience significant tidal stripping, a process that has been previously observed on galaxies in clusters.

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arXiv ID1007.4815 (version 2)

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CitationAleksi Halkola, Sherry H. Suyu. "The Halos of Satellite Galaxies: the Companion of the Massive Elliptical Lens SL2S J08544-0121." arXiv:1007.4815 (2010). https://pith.science/paper/NRCKKCPP

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What the abstract itself states, as probabilities: claims first 0.95 · states limitation 0.42 · human participants 0.01 · controlled comparison 0.05 · randomized assignment 0.01 · states quantitative result 0.99 · compares with prior results 0.80 · mentions code or data availability 0.02.

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arXiv listing abstract v2. Results and the main claim are underlined; show every role.

Strong gravitational lensing by groups or clusters of galaxies provides a powerful technique to measure the dark matter properties of individual lens galaxies. We study in detail the mass distribution of the satellite lens galaxy in the group-scale lens SL2S J08544-0121 by modelling simultaneously the spatially extended surface brightness distribution of the source galaxy and the lens mass distribution using Markov chain Monte Carlo methods. In particular, we measure the dark matter halo size of the satellite lens galaxy to be 6.0^{+2.9}_{-2.0} kpc with a fiducial velocity dispersion of 127^{+21}_{-12} km/s. This is the first time the size of an individual galaxy halo in a galaxy group has been measured using strong gravitational lensing without assumptions of mass following light. We verify the robustness of our halo size measurement using mock data resembling our lens system. Our measurement of the halo size is compatible with the estimated tidal radius of the satellite galaxy, suggesting that halos of galaxies in groups experience significant tidal stripping, a process that has been previously observed on galaxies in clusters. Our mass model of the satellite galaxy is elliptical with its major axis misaligned with that of the light by ~50 deg. The major axis of the total matter distribution is oriented more towards the centre of the host halo, exhibiting the radial alignment found in N-body simulations and observational studies of satellite galaxies. This misalignment between mass and light poses a significant challenge to modified Newtonian dynamics.

background contribution method result interpretation main claim

What the classifier reports for each sentence. The number is the probability it gave the label.
#	sentence	role	the authors' own work	states the main conclusion	strength
s0	Strong gravitational lensing by groups or clusters of galaxies provides a powerful technique to measure the dark matter properties of individual lens galaxies.	background 1.00	0.05	0.03	asserted 1.00
s1	We study in detail the mass distribution of the satellite lens galaxy in the group-scale lens SL2S J08544-0121 by modelling simultaneously the spatially extended surface brightness distribution of the source galaxy and the lens mass distribution using Markov chain Monte Carlo methods.	contribution 0.68	0.97	0.05	asserted 0.96
s2	In particular, we measure the dark matter halo size of the satellite lens galaxy to be 6.0^{+2.9}_{-2.0} kpc with a fiducial velocity dispersion of 127^{+21}_{-12} km/s.	result 1.00	0.98	0.55	asserted 1.00
s3	This is the first time the size of an individual galaxy halo in a galaxy group has been measured using strong gravitational lensing without assumptions of mass following light.	contribution 0.79	0.91	0.38	asserted 1.00
s4	We verify the robustness of our halo size measurement using mock data resembling our lens system.	method 0.93	0.96	0.03	asserted 1.00
s5	Our measurement of the halo size is compatible with the estimated tidal radius of the satellite galaxy, suggesting that halos of galaxies in groups experience significant tidal stripping, a process that has been previously observed on galaxies in clusters.	interpretation 0.98	0.83	0.29	hedged possibility 0.98
s6	Our mass model of the satellite galaxy is elliptical with its major axis misaligned with that of the light by ~50 deg.	result 1.00	0.95	0.07	asserted 1.00
s7	The major axis of the total matter distribution is oriented more towards the centre of the host halo, exhibiting the radial alignment found in N-body simulations and observational studies of satellite galaxies.	result 0.75	0.81	0.11	asserted 1.00
s8	This misalignment between mass and light poses a significant challenge to modified Newtonian dynamics.	interpretation 1.00	0.46	0.11	asserted 1.00

What kind of paper the classifier reports this is: empirical study 1.00 · evidence from analysis of existing data 0.73.

What was examined, and what was not

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arXiv listing abstract v2

not examined

full text
figures and tables
references and citing sentences
relations to other papers

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P abstract

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Every quoted sentence on this record is the authors'. Every label is from Pith's closed vocabulary, with the probability shown beside it. Every number in the measurements table is the authors', checked by code. Record as JSON

The paper

Original abstract

Strong gravitational lensing by groups or clusters of galaxies provides a powerful technique to measure the dark matter properties of individual lens galaxies. We study in detail the mass distribution of the satellite lens galaxy in the group-scale lens SL2S J08544-0121 by modelling simultaneously the spatially extended surface brightness distribution of the source galaxy and the lens mass distribution using Markov chain Monte Carlo methods. In particular, we measure the dark matter halo size of the satellite lens galaxy to be 6.0^{+2.9}_{-2.0} kpc with a fiducial velocity dispersion of 127^{+21}_{-12} km/s. This is the first time the size of an individual galaxy halo in a galaxy group has been measured using strong gravitational lensing without assumptions of mass following light. We verify the robustness of our halo size measurement using mock data resembling our lens system. Our measurement of the halo size is compatible with the estimated tidal radius of the satellite galaxy, suggesting that halos of galaxies in groups experience significant tidal stripping, a process that has been previously observed on galaxies in clusters. Our mass model of the satellite galaxy is elliptical with its major axis misaligned with that of the light by ~50 deg. The major axis of the total matter distribution is oriented more towards the centre of the host halo, exhibiting the radial alignment found in N-body simulations and observational studies of satellite galaxies. This misalignment between mass and light poses a significant challenge to modified Newtonian dynamics.

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Cited by 6 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

OASIS: On-the-fly ASynchronous Image Stream classification -- Transformer-based models for the early detection of strongly lensed supernovae
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Factorized attention (separating spatial and temporal interactions) gives lower classification loss than joint attention or a ConvLSTM baseline for causal, on-the-fly classification of asynchronous multi-band image streams.
Characterization of subhalo structural properties and implications for dark matter annihilation signals
astro-ph.CO 2016-03 conditional novelty 6.0 of 10

Subhalos are more concentrated than field halos of the same mass, and accounting for that raises the predicted substructure boost to dark matter annihilation by a factor of two to three, before tidal stripping cuts it back.
jax-SNANA: A GPU-accelerated Supernova Framework for the SBI Era
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jax-SNANA is a fast, GPU-accelerated supernova simulation and inference framework that shows excellent agreement with SNANA while providing transformational speedups for LSST-era cosmology.
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The first Hubble constant measurement from the quadruply lensed quasar J1537-3010 gives H0 = 75.5^{+9.3}_{-5.8} km/s/Mpc in flat Lambda-CDM, combining 2%-precision time delays, HST imaging, MUSE stellar kinematics, an...
TDCOSMO. XXVII. JWST-based Lens Models and H$_0$ Measurement of WFI2033, HE0435, and PG1115
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JWST-based lens models of three quadruply imaged quasars give H0 = 73.5+2.7-2.8 km/s/Mpc under flat Lambda-CDM with the internal mass-sheet fixed, consistent with HST-based results.

Show 1 more citing papers

Strong gravitational lensing with Euclid
astro-ph.GA 2026-10 unverdicted novelty 2.0 of 10

The author projects that Euclid will discover about 100,000 new strong gravitational lenses, a 30-fold increase that could transform the field.

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8 arXiv papers cite this in 10 sentences

Each citing sentence is taken from the citing paper's LaTeX source and typed by Pith's classifier. A label appears at probability 0.8 or more (0.95 for support), a contest at 0.7 or more; the quoted words are the citing authors'. How each label was checked · JSON

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Uses its method or tool 4 papers

First, it was decided to consider only the two models that are based on codes designed to do high-precision cosmography, glee [ref] and glafic [ref] , weighted by their agreement with observables independent of , yielding $H_0=66.6^+4.1_-3.3$ .

Strong Lensing and $H_0$ · Supernova time delay cosmography: the “Refsdal” case study · 0.95
In this work, we make use of two well-established, independent, lens modeling algorithms, [ref] and Glee [ref] .

Supernova 2025wny: High-angular resolution Keck/NIRC2 observations and preliminary lens modeling · Lens modeling methodology · 1.00
The lensing configurations are generated using our -based [ref] simulation pipeline [ref] .

HOLISMOKES XXI: Detecting strongly lensed type Ia supernovae from time series of multi-band LSST-like imaging data -- Part II · Summary of the datasets · 0.99

Uses its data or values 1 paper

We adopt the average magnification from the two parametric reconstructions provided; [ref] and [ref] .

(Re)solving the Complex Multiscale Morphology and V-shaped Spectral Energy Distribution of a Newly Discovered Strongly Lensed Little Red Dot in A383 · Lens Model · 0.81

Compares with it 1 paper

From the observation, the time delay between S1 and SX is measured to $∼350$ days, which is in excellent agreement with several model predictions, in particular those made with glafic [ref] and GLEE [ref] .

Strong gravitational lensing of explosive transients · Discovery of SN Refsdal. · 0.86

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