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  • Thater, SabineUniversität Wien,University of Vienna,Leibniz-Institut Für Astrophysik Potsdam,Leibniz Institute for Astrophysics Potsdam (author)

Cross-checking SMBH mass estimates in NGC 6958-I. Stellar dynamics from adaptive optics-assisted MUSE observations

  • Article/chapterEnglish2022

Publisher, publication year, extent ...

  • 2021-11-10
  • Oxford University Press (OUP),2022
  • electronicrdacarrier

Numbers

  • LIBRIS-ID:oai:research.chalmers.se:ef43c148-e73d-4460-8e58-a8d26b694fc7
  • https://doi.org/10.1093/mnras/stab3210DOI
  • https://research.chalmers.se/publication/530485URI

Supplementary language notes

  • Language:English
  • Summary in:English

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  • Subject category:art swepub-publicationtype
  • Subject category:ref swepub-contenttype

Notes

  • Supermassive black hole masses (M (BH)) can dynamically be estimated with various methods and using different kinematic tracers. Different methods have only been cross-checked for a small number of galaxies and often show discrepancies. To understand these discrepancies, detailed cross-comparisons of additional galaxies are needed. We present the first part of our cross-comparison between stellar- and gas-based M-BH estimates in the nearby fast-rotating early-type galaxy NGC 6958. The measurements presented here are based on ground-layer adaptive optics-assisted Multi-Unit Spectroscopic Explorer (MUSE) science verification data at around 0."6 spatial resolution. The spatial resolution is a key ingredient for the measurement and we provide a Gaussian parametrization of the adaptive optics-assisted point spread function for various wavelengths. From the MUSE data, we extracted the stellar kinematics and constructed dynamical models. Using an axisymmetric Schwarzschild technique, we measured an M-BH of (3.6(-2.4)(+2.7)) x10(8) M-circle dot at 3 sigma significance taking kinematical and dynamical systematics (e.g. radially varying mass-to-light ratio) into account. We also added a dark halo, but our data do not allow us to constrain the dark matter fraction. Adding dark matter with an abundance matching prior results in a 25 per cent more massive black hole. Jeans anisotropic models return M-BH of (4.6(-2.7)(+2.5)) x10(8) and (8.6(-0.8)(+0.8)) x10(8) M-circle dot at 3 sigma confidence for spherical and cylindrical alignments of the velocity ellipsoid, respectively. In a follow-up study, we will compare the stellar-based M (BH) with those from cold and warm gas tracers, which will provide additional constraints for the M-BH for NGC 6958, and insights into assumptions that lead to potential systematic uncertainty.

Subject headings and genre

Added entries (persons, corporate bodies, meetings, titles ...)

  • Krajnovic, DavorLeibniz-Institut Für Astrophysik Potsdam,Leibniz Institute for Astrophysics Potsdam (author)
  • Weilbacher, Peter M.Leibniz-Institut Für Astrophysik Potsdam,Leibniz Institute for Astrophysics Potsdam (author)
  • Nguyen, Dieu D.Vietnam National University (author)
  • Bureau, MartinYonsei University,University Of Oxford (author)
  • Cappellari, MicheleUniversity Of Oxford (author)
  • Davis, Timothy A.Cardiff University (author)
  • Iguchi, SatoruNational Institutes of Natural Sciences (NINS) (author)
  • McDermid, RichardMacquarie University (author)
  • Onishi, Kyoko,1989Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)kyokoo (author)
  • Sarzi, Marc (author)
  • van de Ven, GlennUniversität Wien,University of Vienna (author)
  • Universität WienLeibniz-Institut Für Astrophysik Potsdam (creator_code:org_t)

Related titles

  • In:Monthly Notices of the Royal Astronomical Society: Oxford University Press (OUP)509:4, s. 5416-54360035-87111365-2966

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