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Monthly Notices of the Royal Astronomical SocietyVolume 363, Issue 3, 1 November 2005, Pages 769-800

Dark matter in early-type galaxies: Dynamical modelling of IC 1459, IC 3370, NGC 3379 and NGC 4105(Article)(Open Access)

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  • aDipartimento di Astronomia, Università di Trieste, Via Tiepolo 11, I-34131 Trieste, Serbia
  • bINAF, Osservatorio Astronomico di Trieste, Via Tiepolo 11, I-34131 Trieste, Serbia
  • cAstronomical Observatory, Volgina 7, 11160 Belgrade, Serbia
  • dInstitute Isaac Newton of Chile, Yugoslavia Branch, Serbia

Abstract

We analyse long-slit spectra of four early-type galaxies which extend from ∼1 to 3 effective radii: IC 1459; IC 3370; NGC 3379 and NGC 4105. We have extracted the full line-of-sight velocity distribution (in the case of NGC 3379 we also used data from the literature), which we model using the two-integral approach. Using two-integral modelling, we find no strong evidence for dark haloes, but the fits suggest that three-integral modelling is necessary. We also find that the inferred constant mass-to-light ratio in all the four cases is typical for early-type galaxies. Finally, we also discuss the constraints on the mass-to-light ratio, which can be obtained using X-ray haloes in the case of IC 1459, NGC 3379 and NGC 4105, and compare the estimated values with the predictions from the dynamical modelling. © 2005 RAS.

Author keywords

Dark matterGalaxies: elliptical and lenticularGalaxies: ISMGalaxies: kinematics and dynamicsGalaxies: structureX-rays

Indexed keywords

Engineering controlled terms:GalaxiesTiming circuits
Engineering uncontrolled termsDark matterDynamical modelingEarly typesEffective radiusGalaxies: elliptical and lenticularGalaxies: ISMGalaxies: Kinematics and dynamicsGalaxies:structureIntegral modelSpectra's
Engineering main heading:Integrated circuits
  • ISSN: 00358711
  • CODEN: MNRAA
  • Source Type: Journal
  • Original language: English
  • DOI: 10.1111/j.1365-2966.2005.09479.x
  • Document Type: Article
  • Publisher: Blackwell Publishing Ltd

  Samurović, S.; Dipartimento di Astronomia, Università di Trieste, Via Tiepolo 11, Serbia;
© Copyright 2022 Elsevier B.V., All rights reserved.

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