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Selected Works of Aaron J. Romanowsky
Article
The SLUGGS survey: revisiting the correlation between X-ray luminosity and total mass of massive early-type galaxies
Monthly Notices of the Royal Astronomical Society Letters (2017)
  • Duncan A. Forbes, Swinburne University of Technology
  • Adebusola B. Alabi, Swinburne University of Technology
  • Aaron J. Romanowsky, San Jose State University
  • Dong-Woo Kim, Smithsonian Astrophysical Observatory
  • Jean P. Brodie, University of California Observatories
  • Giuseppina Fabbiano, Smithsonian Astrophysical Observatory
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Abstract
Here we utilize recent measures of galaxy total dynamical mass and X-ray gas luminosities (LX,Gas) for a sample of 29 massive early-type galaxies from the SLUGGS survey to probe LX, Gas–mass scaling relations. In particular, we investigate scalings with stellar mass, dynamical mass within 5 effective radii (Re) and total virial mass. We also compare these relations with predictions from Λ cold dark matter simulations. We find a strong linear relationship between LX, Gas and galaxy dynamical mass within 5Re, which is consistent with the recent cosmological simulations of Choi et al. that incorporate mechanical heating from AGN. We conclude that the gas surrounding massive early-type galaxies was shock-heated as it fell into collapsing dark matter haloes so that LX, Gas is primarily driven by the depth of a galaxy's potential well. Heating by an AGN plays an important secondary role in determining LX, Gas.
Keywords
  • galaxies: elliptical and lenticular,
  • cD,
  • galaxies: evolution,
  • galaxies: haloes,
  • X-rays: galaxies
Disciplines
Publication Date
January, 2017
DOI
10.1093/mnrasl/slw176
Publisher Statement
This article was originally published in Monthly Notices of the Royal Astronomical Society Letters, volume 464, issue 1. ©: 2016 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.

This article can also be found online at the following link: https://doi.org/10.1093/mnrasl/slw176
Citation Information
Duncan A. Forbes, Adebusola B. Alabi, Aaron J. Romanowsky, Dong-Woo Kim, et al.. "The SLUGGS survey: revisiting the correlation between X-ray luminosity and total mass of massive early-type galaxies" Monthly Notices of the Royal Astronomical Society Letters Vol. 464 Iss. 1 (2017) p. L26 - L30 ISSN: 1745-3933
Available at: http://works.bepress.com/aaron_romanowsky/127/