The SWELLS survey: IV. Precision measurements of the stellar and dark matter distributions in a spiral lens galaxy

Matteo Barnabe; Aaron A. Dutton; Philip J. Marshall; Matthew W. Auger; Brendon J. Brewer; Tommaso Treu; Adam S. Bolton; David C. Koo; Leon V. E. Koopmans

doi:10.1111/j.1365-2966.2012.20934.x

The SWELLS survey: IV. Precision measurements of the stellar and dark matter distributions in a spiral lens galaxy

Matteo Barnabe^*, Aaron A. Dutton, Philip J. Marshall, Matthew W. Auger, Brendon J. Brewer, Tommaso Treu, Adam S. Bolton, David C. Koo, Leon V. E. Koopmans

^*Corresponding author for this work

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Abstract

We construct a fully self-consistent mass model for the lens galaxy SDSS J2141 at redshift 0.14, and use it to improve on previous studies by modelling its gravitational lensing effect, gas rotation curve and stellar kinematics simultaneously. We adopt a very flexible axisymmetric mass model constituted by a generalized NavarroFrenkWhite (NFW) dark matter halo and a stellar mass distribution obtained by deprojecting the multi-Gaussian expansion fit to the high-resolution K'-band laser guide star adaptive optics imaging data of the galaxy, with the (spatially constant) mass-to-light ratio as a free parameter. We model the stellar kinematics by solving the anisotropic Jeans equations. We find that the inner logarithmic slope of the dark halo is weakly constrained, i.e. , and consistent with an unmodified NFW profile; we can conclude, however, that steep profiles (?= 1.5) are disfavoured (

Original language	English
Pages (from-to)	1073-1088
Number of pages	16
Journal	Monthly Notices of the Royal Astronomical Society
Volume	423
Issue number	2
DOIs	https://doi.org/10.1111/j.1365-2966.2012.20934.x
Publication status	Published - Jun-2012

Keywords

gravitational lensing: strong
galaxies: fundamental parameters
galaxies: haloes
galaxies: kinematics and dynamics
galaxies: spiral
galaxies: structure
INITIAL MASS FUNCTION
SPECTROSCOPICALLY SELECTED SAMPLE
MULTI-GAUSSIAN EXPANSION
TO-LIGHT RATIOS
2-DIMENSIONAL KINEMATICS
SLACS LENSES
ADIABATIC CONTRACTION
INTERNAL STRUCTURE
ELLIPTIC GALAXIES
SCALING RELATIONS

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Barnabe, M., Dutton, A. A., Marshall, P. J., Auger, M. W., Brewer, B. J., Treu, T., Bolton, A. S., Koo, D. C., & Koopmans, L. V. E. (2012). The SWELLS survey: IV. Precision measurements of the stellar and dark matter distributions in a spiral lens galaxy. Monthly Notices of the Royal Astronomical Society, 423(2), 1073-1088. https://doi.org/10.1111/j.1365-2966.2012.20934.x

@article{0597067008a44a3a86d6503e35905771,

title = "The SWELLS survey: IV. Precision measurements of the stellar and dark matter distributions in a spiral lens galaxy",

abstract = "We construct a fully self-consistent mass model for the lens galaxy SDSS J2141 at redshift 0.14, and use it to improve on previous studies by modelling its gravitational lensing effect, gas rotation curve and stellar kinematics simultaneously. We adopt a very flexible axisymmetric mass model constituted by a generalized NavarroFrenkWhite (NFW) dark matter halo and a stellar mass distribution obtained by deprojecting the multi-Gaussian expansion fit to the high-resolution K'-band laser guide star adaptive optics imaging data of the galaxy, with the (spatially constant) mass-to-light ratio as a free parameter. We model the stellar kinematics by solving the anisotropic Jeans equations. We find that the inner logarithmic slope of the dark halo is weakly constrained, i.e. , and consistent with an unmodified NFW profile; we can conclude, however, that steep profiles (?= 1.5) are disfavoured (",

keywords = "gravitational lensing: strong, galaxies: fundamental parameters, galaxies: haloes, galaxies: kinematics and dynamics, galaxies: spiral, galaxies: structure, INITIAL MASS FUNCTION, SPECTROSCOPICALLY SELECTED SAMPLE, MULTI-GAUSSIAN EXPANSION, TO-LIGHT RATIOS, 2-DIMENSIONAL KINEMATICS, SLACS LENSES, ADIABATIC CONTRACTION, INTERNAL STRUCTURE, ELLIPTIC GALAXIES, SCALING RELATIONS",

author = "Matteo Barnabe and Dutton, {Aaron A.} and Marshall, {Philip J.} and Auger, {Matthew W.} and Brewer, {Brendon J.} and Tommaso Treu and Bolton, {Adam S.} and Koo, {David C.} and Koopmans, {Leon V. E.}",

year = "2012",

month = jun,

doi = "10.1111/j.1365-2966.2012.20934.x",

language = "English",

volume = "423",

pages = "1073--1088",

journal = "Monthly Notices of the Royal Astronomical Society",

issn = "0035-8711",

publisher = "Oxford University Press",

number = "2",

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TY - JOUR

T1 - The SWELLS survey

T2 - IV. Precision measurements of the stellar and dark matter distributions in a spiral lens galaxy

AU - Barnabe, Matteo

AU - Dutton, Aaron A.

AU - Marshall, Philip J.

AU - Auger, Matthew W.

AU - Brewer, Brendon J.

AU - Treu, Tommaso

AU - Bolton, Adam S.

AU - Koo, David C.

AU - Koopmans, Leon V. E.

PY - 2012/6

Y1 - 2012/6

N2 - We construct a fully self-consistent mass model for the lens galaxy SDSS J2141 at redshift 0.14, and use it to improve on previous studies by modelling its gravitational lensing effect, gas rotation curve and stellar kinematics simultaneously. We adopt a very flexible axisymmetric mass model constituted by a generalized NavarroFrenkWhite (NFW) dark matter halo and a stellar mass distribution obtained by deprojecting the multi-Gaussian expansion fit to the high-resolution K'-band laser guide star adaptive optics imaging data of the galaxy, with the (spatially constant) mass-to-light ratio as a free parameter. We model the stellar kinematics by solving the anisotropic Jeans equations. We find that the inner logarithmic slope of the dark halo is weakly constrained, i.e. , and consistent with an unmodified NFW profile; we can conclude, however, that steep profiles (?= 1.5) are disfavoured (

AB - We construct a fully self-consistent mass model for the lens galaxy SDSS J2141 at redshift 0.14, and use it to improve on previous studies by modelling its gravitational lensing effect, gas rotation curve and stellar kinematics simultaneously. We adopt a very flexible axisymmetric mass model constituted by a generalized NavarroFrenkWhite (NFW) dark matter halo and a stellar mass distribution obtained by deprojecting the multi-Gaussian expansion fit to the high-resolution K'-band laser guide star adaptive optics imaging data of the galaxy, with the (spatially constant) mass-to-light ratio as a free parameter. We model the stellar kinematics by solving the anisotropic Jeans equations. We find that the inner logarithmic slope of the dark halo is weakly constrained, i.e. , and consistent with an unmodified NFW profile; we can conclude, however, that steep profiles (?= 1.5) are disfavoured (

KW - gravitational lensing: strong

KW - galaxies: fundamental parameters

KW - galaxies: haloes

KW - galaxies: kinematics and dynamics

KW - galaxies: spiral

KW - galaxies: structure

KW - INITIAL MASS FUNCTION

KW - SPECTROSCOPICALLY SELECTED SAMPLE

KW - MULTI-GAUSSIAN EXPANSION

KW - TO-LIGHT RATIOS

KW - 2-DIMENSIONAL KINEMATICS

KW - SLACS LENSES

KW - ADIABATIC CONTRACTION

KW - INTERNAL STRUCTURE

KW - ELLIPTIC GALAXIES

KW - SCALING RELATIONS

U2 - 10.1111/j.1365-2966.2012.20934.x

DO - 10.1111/j.1365-2966.2012.20934.x

M3 - Article

SN - 0035-8711

VL - 423

SP - 1073

EP - 1088

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 2

ER -

The SWELLS survey: IV. Precision measurements of the stellar and dark matter distributions in a spiral lens galaxy

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Keywords

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