The SAMI Pilot Survey: the fundamental and mass planes in three low-redshift clusters
Using new integral field observations of 106 galaxies in three nearby clusters, we investigate how the intrinsic scatter of the Fundamental Plane depends on the way in which the velocity dispersion and effective radius are measured. Our spatially resolved spectroscopy, combined with a cluster sample...
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fthighwire:oai:open-archive.highwire.org:mnras:451/3/2723 2023-05-15T18:12:16+02:00 The SAMI Pilot Survey: the fundamental and mass planes in three low-redshift clusters Scott, Nicholas Fogarty, L. M. R. Owers, Matt S. Croom, Scott M. Colless, Matthew Davies, Roger L. Brough, S. Pracy, Michael B. Bland-Hawthorn, Joss Jones, D. Heath Allen, J. T. Bryant, Julia J. Cortese, Luca Goodwin, Michael Green, Andrew W. Konstantopoulos, Iraklis S. Lawrence, J. S. Richards, Samuel Sharp, Rob 2015-06-17 05:02:29.0 text/html http://mnras.oxfordjournals.org/cgi/content/short/451/3/2723 https://doi.org/10.1093/mnras/stv1127 en eng Oxford University Press http://mnras.oxfordjournals.org/cgi/content/short/451/3/2723 http://dx.doi.org/10.1093/mnras/stv1127 Copyright (C) 2015, Oxford University Press Article TEXT 2015 fthighwire https://doi.org/10.1093/mnras/stv1127 2016-11-16T17:07:03Z Using new integral field observations of 106 galaxies in three nearby clusters, we investigate how the intrinsic scatter of the Fundamental Plane depends on the way in which the velocity dispersion and effective radius are measured. Our spatially resolved spectroscopy, combined with a cluster sample with negligible relative distance errors, allows us to derive a Fundamental Plane with minimal systematic uncertainties. From the apertures we tested, we find that velocity dispersions measured within a circular aperture with radius equal to one effective radius minimizes the intrinsic scatter of the Fundamental Plane. Using simple yet powerful Jeans dynamical models, we determine dynamical masses for our galaxies. Replacing luminosity in the Fundamental Plane with dynamical mass, we demonstrate that the resulting Mass Plane has further reduced scatter, consistent with zero intrinsic scatter. Using these dynamical models, we also find evidence for a possibly non-linear relationship between dynamical mass-to-light ratio and velocity dispersion. Text sami HighWire Press (Stanford University) Monthly Notices of the Royal Astronomical Society 451 3 2723 2734 |
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Article Scott, Nicholas Fogarty, L. M. R. Owers, Matt S. Croom, Scott M. Colless, Matthew Davies, Roger L. Brough, S. Pracy, Michael B. Bland-Hawthorn, Joss Jones, D. Heath Allen, J. T. Bryant, Julia J. Cortese, Luca Goodwin, Michael Green, Andrew W. Konstantopoulos, Iraklis S. Lawrence, J. S. Richards, Samuel Sharp, Rob The SAMI Pilot Survey: the fundamental and mass planes in three low-redshift clusters |
topic_facet |
Article |
description |
Using new integral field observations of 106 galaxies in three nearby clusters, we investigate how the intrinsic scatter of the Fundamental Plane depends on the way in which the velocity dispersion and effective radius are measured. Our spatially resolved spectroscopy, combined with a cluster sample with negligible relative distance errors, allows us to derive a Fundamental Plane with minimal systematic uncertainties. From the apertures we tested, we find that velocity dispersions measured within a circular aperture with radius equal to one effective radius minimizes the intrinsic scatter of the Fundamental Plane. Using simple yet powerful Jeans dynamical models, we determine dynamical masses for our galaxies. Replacing luminosity in the Fundamental Plane with dynamical mass, we demonstrate that the resulting Mass Plane has further reduced scatter, consistent with zero intrinsic scatter. Using these dynamical models, we also find evidence for a possibly non-linear relationship between dynamical mass-to-light ratio and velocity dispersion. |
format |
Text |
author |
Scott, Nicholas Fogarty, L. M. R. Owers, Matt S. Croom, Scott M. Colless, Matthew Davies, Roger L. Brough, S. Pracy, Michael B. Bland-Hawthorn, Joss Jones, D. Heath Allen, J. T. Bryant, Julia J. Cortese, Luca Goodwin, Michael Green, Andrew W. Konstantopoulos, Iraklis S. Lawrence, J. S. Richards, Samuel Sharp, Rob |
author_facet |
Scott, Nicholas Fogarty, L. M. R. Owers, Matt S. Croom, Scott M. Colless, Matthew Davies, Roger L. Brough, S. Pracy, Michael B. Bland-Hawthorn, Joss Jones, D. Heath Allen, J. T. Bryant, Julia J. Cortese, Luca Goodwin, Michael Green, Andrew W. Konstantopoulos, Iraklis S. Lawrence, J. S. Richards, Samuel Sharp, Rob |
author_sort |
Scott, Nicholas |
title |
The SAMI Pilot Survey: the fundamental and mass planes in three low-redshift clusters |
title_short |
The SAMI Pilot Survey: the fundamental and mass planes in three low-redshift clusters |
title_full |
The SAMI Pilot Survey: the fundamental and mass planes in three low-redshift clusters |
title_fullStr |
The SAMI Pilot Survey: the fundamental and mass planes in three low-redshift clusters |
title_full_unstemmed |
The SAMI Pilot Survey: the fundamental and mass planes in three low-redshift clusters |
title_sort |
sami pilot survey: the fundamental and mass planes in three low-redshift clusters |
publisher |
Oxford University Press |
publishDate |
2015 |
url |
http://mnras.oxfordjournals.org/cgi/content/short/451/3/2723 https://doi.org/10.1093/mnras/stv1127 |
genre |
sami |
genre_facet |
sami |
op_relation |
http://mnras.oxfordjournals.org/cgi/content/short/451/3/2723 http://dx.doi.org/10.1093/mnras/stv1127 |
op_rights |
Copyright (C) 2015, Oxford University Press |
op_doi |
https://doi.org/10.1093/mnras/stv1127 |
container_title |
Monthly Notices of the Royal Astronomical Society |
container_volume |
451 |
container_issue |
3 |
container_start_page |
2723 |
op_container_end_page |
2734 |
_version_ |
1766184815226257408 |