Comparing lensing and stellar orbital models of a nearby massive strong-lens galaxy
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 constraint...
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ftunivdurham:oai:dro.dur.ac.uk.OAI2:36270 2023-05-15T18:12:45+02:00 Comparing lensing and stellar orbital models of a nearby massive strong-lens galaxy Poci, Adriano Smith, Russell J 2022-06 application/pdf http://dro.dur.ac.uk/36270/ http://dro.dur.ac.uk/36270/1/36270.pdf https://doi.org/10.1093/mnras/stac776 unknown Oxford University Press dro:36270 issn:0035-8711 issn: 1365-2966 doi:10.1093/mnras/stac776 http://dro.dur.ac.uk/36270/ https://doi.org/10.1093/mnras/stac776 http://dro.dur.ac.uk/36270/1/36270.pdf © The Author(s) 2022. Published by Oxford University Press on behalf of Royal Astronomical Society. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited. CC-BY Monthly Notices of the Royal Astronomical Society, 2022, Vol.512(4), pp.5298-5310 [Peer Reviewed Journal] Article PeerReviewed 2022 ftunivdurham https://doi.org/10.1093/mnras/stac776 2022-06-30T22:25:09Z 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 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 Durham University: Durham Research Online Monthly Notices of the Royal Astronomical Society 512 4 5298 5310 |
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Durham University: Durham Research Online |
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description |
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 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. |
format |
Article in Journal/Newspaper |
author |
Poci, Adriano Smith, Russell J |
spellingShingle |
Poci, Adriano Smith, Russell J Comparing lensing and stellar orbital models of a nearby massive strong-lens galaxy |
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 |
publishDate |
2022 |
url |
http://dro.dur.ac.uk/36270/ http://dro.dur.ac.uk/36270/1/36270.pdf https://doi.org/10.1093/mnras/stac776 |
genre |
sami |
genre_facet |
sami |
op_source |
Monthly Notices of the Royal Astronomical Society, 2022, Vol.512(4), pp.5298-5310 [Peer Reviewed Journal] |
op_relation |
dro:36270 issn:0035-8711 issn: 1365-2966 doi:10.1093/mnras/stac776 http://dro.dur.ac.uk/36270/ https://doi.org/10.1093/mnras/stac776 http://dro.dur.ac.uk/36270/1/36270.pdf |
op_rights |
© The Author(s) 2022. Published by Oxford University Press on behalf of Royal Astronomical Society. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited. |
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 |
container_issue |
4 |
container_start_page |
5298 |
op_container_end_page |
5310 |
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1766185242591232000 |