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The SAMI Galaxy Survey: Data Release Two with absorption-line physics value-added products

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posted on 2024-08-06, 11:50 authored by Nicholas Scott, Jesse van de Sande, Scott M. Croom, Brent Groves, Matt S. Owers, Henry Poetrodjojo, Francesco D'Eugenio, Anne M. Medling, Dilyar Barat, Tania M. Barone, Joss Bland-Hawthorn, Sarah Brough, Julia Bryant, Luca Cortese, Caroline Foster, Andrew W. Green, Sree Oh, Matthew Colless, Michael J. Drinkwater, Simon P. Driver, Michael Goodwin, Madusha L.P. Gunawardhana, Christoph Federrath, Lloyd Harischandra, Yifei Jin, J. S. Lawrence, Nuria P. Lorente, Elizabeth Mannering, Simon O'Toole, Samuel N. Richards, Sebastian F. Sanchez, Adam L. Schaefer, Katrina Sealey, Rob Sharp, Sarah Sweet, Dan S. Taranu, Mathew Varidel
We present the second major release of data from the Sydney - Australian Astronomical Observatory Multi-Object Integral Field Spectrograph (SAMI) Galaxy Survey. Data Release Two includes data for 1559 galaxies, about 50 per cent of the full survey. Galaxies included have a redshift range 0.004 < z < 0.113 and a large stellar mass range 7.5 < log (M-*/M-circle dot) < 11.6. The core data for each galaxy consist of two primary spectral cubes covering the blue and red optical wavelength ranges. For each primary cube, we also provide three spatially binned spectral cubes and a set of standardized aperture spectra. For each core data product, we provide a set of value-added data products. This includes all emission line value-added products from Data Release One, expanded to the larger sample. In addition, we include stellar kinematic and stellar population value-added products derived from absorption line measurements. The data are provided online through Australian Astronomical Optics' Data Central. We illustrate the potential of this release by presenting the distribution of similar to 350 000 stellar velocity dispersion measurements from individual spaxels as a function of R/R e , divided in four galaxy mass bins. In the highest stellar mass bin [log (M-*/M-circle dot) > 11], the velocity dispersion strongly increases towards the centre, whereas below log (M-*/M-circle dot) < 10 we find no evidence for a clear increase in the central velocity dispersion. This suggests a transition mass around log (M-*/M-circle dot) similar to 10 for galaxies with or without a dispersion-dominated bulge.

Funding

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History

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ISSN

1365-2966

Journal title

Monthly Notices of the Royal Astronomical Society

Volume

481

Issue

2

Pagination

20 pp

Publisher

Oxford University Press (OUP)

Copyright statement

This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society. Copyright © 2018 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.

Language

eng

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