Testing the robustness of black hole mass measurements with ALMA and MUSE. Issue Volume 14:Issue S353(2019) (June 2019)

• Record Type: Journal Article
• Authors: Thater, Sabine; Krajnović, Davor; Nguyen, Dieu D.; Iguchi, Satoru; Weilbacher, Peter M.
• Editors: Valluri, Monica; Sellwood, J. A.
• Is Part Of: Proceedings of the International Astronomical Union. Volume 14:Issue S353(2019)
• Page Start: 199
• Page End: 202
• Publication Date: 2019-06
• Subjects: galaxies: kinematics and dynamics, -- galaxies: nuclei, -- galaxies: individual (NGC6958); Astronomy -- Congresses; Astronomy -- Periodicals; 520
• DOI: 10.1017/S1743921319008445
• Languages: English
• ISSNs: 1743-9213

Abstract

Abstract: We present our ongoing work of using two independent tracers to estimate the supermassive black hole mass in the nearby early-type galaxy NGC 6958; namely integrated stellar and molecular gas kinematics. We used data from the Atacama Large Millimeter/submillimeter Array (ALMA), and the adaptive-optics assisted Multi-Unit Spectroscopic Explorer (MUSE) and constructed state-of-the-art dynamical models. The different methods provide black hole masses of (2.89±2.05)×10 8 M ⊙ from stellar kinematics and (1.35±0.09)×10 8 M ⊙ from molecular gas kinematics which are consistent within their 3σ uncertainties. Compared to recent MBH - σe scaling relations, we derive a slightly over-massive black hole. Our results also confirm previous findings that gas-based methods tend to provide lower black hole masses than stellar-based methods. More black hole mass measurements and an extensive analysis of the method-dependent systematics are needed in the future to understand this noticeable discrepancy.