Comparing lensing and stellar orbital models of a nearby massive strong-lens galaxy
ABSTRACT Exploiting the relative proximity of the nearby strong-lens galaxy SNL-1, we present a critical comparison of the mass estimates derived from independent modelling techniques. We fit triaxial orbit-superposition dynamical models to spatially resolved stellar kinematics, and compare to the c...
Published in: | Monthly Notices of the Royal Astronomical Society |
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Oxford University Press (OUP)
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croxfordunivpr:10.1093/mnras/stac776 2023-05-15T18:12:50+02:00 Comparing lensing and stellar orbital models of a nearby massive strong-lens galaxy Poci, Adriano Smith, Russell J Science and Technology Facilities Council 2022 http://dx.doi.org/10.1093/mnras/stac776 https://academic.oup.com/mnras/advance-article-pdf/doi/10.1093/mnras/stac776/42973767/stac776.pdf https://academic.oup.com/mnras/article-pdf/512/4/5298/43374930/stac776.pdf en eng Oxford University Press (OUP) https://creativecommons.org/licenses/by/4.0/ CC-BY Monthly Notices of the Royal Astronomical Society volume 512, issue 4, page 5298-5310 ISSN 0035-8711 1365-2966 Space and Planetary Science Astronomy and Astrophysics journal-article 2022 croxfordunivpr https://doi.org/10.1093/mnras/stac776 2023-02-10T11:24:19Z ABSTRACT Exploiting the relative proximity of the nearby strong-lens galaxy SNL-1, we present a critical comparison of the mass estimates derived from independent modelling techniques. We fit triaxial orbit-superposition dynamical models to spatially resolved stellar kinematics, and compare to the constraints derived from lens modelling of high-resolution photometry. From the dynamical model, we measure the total (dynamical) mass enclosed within a projected aperture of radius the Einstein radius to be log10(MEin/M⊙) = 11.00 ± 0.02, which agrees with previous measurements from lens modelling to within $5{\rm {per\ cent}}$. We then explore the intrinsic (de-projected) properties of the best-fitting dynamical model. We find that SNL-1 has approximately constant, intermediate triaxiality at all radii. It is oblate like in the inner regions (around the Einstein radius) and tends towards spherical at larger radii. The stellar velocity ellipsoid gradually transforms from isotropic in the very central regions to radially biased in the outskirts. We find that SNL-1 is dynamically consistent with the broader galaxy population, as measured by the relative fraction of orbit ‘temperatures’ compared to the CALIFA survey. On the mass–size plane, SNL-1 occupies the most-compact edge given its mass, compared to both the MaNGA and SAMI surveys. Finally, we explore how the observed lensing configuration is affected by the orientation of the lens galaxy. We discuss the implications of such detailed models on future combined lensing and dynamical analyses. Article in Journal/Newspaper sami Oxford University Press (via Crossref) Monthly Notices of the Royal Astronomical Society 512 4 5298 5310 |
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Oxford University Press (via Crossref) |
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English |
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Space and Planetary Science Astronomy and Astrophysics |
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Space and Planetary Science Astronomy and Astrophysics Poci, Adriano Smith, Russell J Comparing lensing and stellar orbital models of a nearby massive strong-lens galaxy |
topic_facet |
Space and Planetary Science Astronomy and Astrophysics |
description |
ABSTRACT Exploiting the relative proximity of the nearby strong-lens galaxy SNL-1, we present a critical comparison of the mass estimates derived from independent modelling techniques. We fit triaxial orbit-superposition dynamical models to spatially resolved stellar kinematics, and compare to the constraints derived from lens modelling of high-resolution photometry. From the dynamical model, we measure the total (dynamical) mass enclosed within a projected aperture of radius the Einstein radius to be log10(MEin/M⊙) = 11.00 ± 0.02, which agrees with previous measurements from lens modelling to within $5{\rm {per\ cent}}$. We then explore the intrinsic (de-projected) properties of the best-fitting dynamical model. We find that SNL-1 has approximately constant, intermediate triaxiality at all radii. It is oblate like in the inner regions (around the Einstein radius) and tends towards spherical at larger radii. The stellar velocity ellipsoid gradually transforms from isotropic in the very central regions to radially biased in the outskirts. We find that SNL-1 is dynamically consistent with the broader galaxy population, as measured by the relative fraction of orbit ‘temperatures’ compared to the CALIFA survey. On the mass–size plane, SNL-1 occupies the most-compact edge given its mass, compared to both the MaNGA and SAMI surveys. Finally, we explore how the observed lensing configuration is affected by the orientation of the lens galaxy. We discuss the implications of such detailed models on future combined lensing and dynamical analyses. |
author2 |
Science and Technology Facilities Council |
format |
Article in Journal/Newspaper |
author |
Poci, Adriano Smith, Russell J |
author_facet |
Poci, Adriano Smith, Russell J |
author_sort |
Poci, Adriano |
title |
Comparing lensing and stellar orbital models of a nearby massive strong-lens galaxy |
title_short |
Comparing lensing and stellar orbital models of a nearby massive strong-lens galaxy |
title_full |
Comparing lensing and stellar orbital models of a nearby massive strong-lens galaxy |
title_fullStr |
Comparing lensing and stellar orbital models of a nearby massive strong-lens galaxy |
title_full_unstemmed |
Comparing lensing and stellar orbital models of a nearby massive strong-lens galaxy |
title_sort |
comparing lensing and stellar orbital models of a nearby massive strong-lens galaxy |
publisher |
Oxford University Press (OUP) |
publishDate |
2022 |
url |
http://dx.doi.org/10.1093/mnras/stac776 https://academic.oup.com/mnras/advance-article-pdf/doi/10.1093/mnras/stac776/42973767/stac776.pdf https://academic.oup.com/mnras/article-pdf/512/4/5298/43374930/stac776.pdf |
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sami |
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sami |
op_source |
Monthly Notices of the Royal Astronomical Society volume 512, issue 4, page 5298-5310 ISSN 0035-8711 1365-2966 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1093/mnras/stac776 |
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Monthly Notices of the Royal Astronomical Society |
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512 |
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4 |
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5298 |
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5310 |
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1766185318513377280 |