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Mapping the dark matter of NGC 2974: Combination of stellar & cold gas kinematics

Published online by Cambridge University Press:  14 May 2020

M. Yang Open the ORCID record for M. Yang [Opens in a new window] ,
L. Zhu ,
A. Weijmans ,
G. van de Ven Open the ORCID record for G. van de Ven [Opens in a new window] ,
N. F. Boardman ,
R. Morganti Open the ORCID record for R. Morganti [Opens in a new window]  and
T. A. Oosterloo
M. Yang
Affiliation:
School of Physics and Astronomy, Univ. of St Andrews, North Haugh, St Andrews, KY16 9SS, UK email: [email protected]
L. Zhu
Affiliation:
Shanghai Astronomical Observatory, Chinese Academy of Sciences, 80 Nandan Road, Shanghai200030, China
A. Weijmans
Affiliation:
School of Physics and Astronomy, Univ. of St Andrews, North Haugh, St Andrews, KY16 9SS, UK email: [email protected]
G. van de Ven
Affiliation:
Department of Astrophysics, Univ. of Vienna, Türkenschanzstrasse 17, 1180 Vienna, Austria ESO, Karl-Schwarzschild-Str 2, D-85748 Garching bei Munchen, Germany
N. F. Boardman
Affiliation:
Department of Physics and Astronomy, Univ. of Utah, Salt Lake City, UT84112, USA
R. Morganti
Affiliation:
ASTRON, Postbus 2, NL-7990 AA Dwingeloo, the Netherlands Kapteyn Astronomical Institute, Univ. of Groningen, PO Box 800, NL-9700 AV Groningen, the Netherlands
T. A. Oosterloo
Affiliation:
ASTRON, Postbus 2, NL-7990 AA Dwingeloo, the Netherlands Kapteyn Astronomical Institute, Univ. of Groningen, PO Box 800, NL-9700 AV Groningen, the Netherlands
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Abstract

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We present a new method to combine cold gas kinematics with the stellar kinematics modelled with the Schwarzschild orbit-superposition technique, and its application to the lenticular galaxy NGC 2974. The combination of stellar and cold gas kinematics significantly improves the constraints on the measured dark matter profile: assuming a generalised NFW halo profile, we find a cuspy inner halo slope for NGC 2974.

Keywords

galaxies: structuregalaxies: kinematics and dynamicsgalaxies: halosdark matter
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 14 , Symposium S353: Galactic Dynamics in the Era of Large Surveys , June 2019 , pp. 253 - 254
Copyright
© International Astronomical Union 2020

References

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