The black hole in the most massive ultracompact dwarf galaxy M59-UCD3
We examine the internal properties of the most massive ultracompact dwarf galaxy (UCD), M59-UCD3, by combining adaptive-optics-assisted near-IR integral field spectroscopy from Gemini/NIFS and Hubble Space Telescope (HST) imaging. We use the multiband HST imaging to create a mass model that suggests...
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| Main Authors: | , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
2018 May 11
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| In: |
The astrophysical journal
Year: 2018, Volume: 858, Issue: 2 |
| ISSN: | 1538-4357 |
| DOI: | 10.3847/1538-4357/aabc57 |
| Online Access: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.3847/1538-4357/aabc57
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| Author Notes: | Christopher P. Ahn, Anil C. Seth, Michele Cappellari, Davor Krajnović, Jay Strader, Karina T. Voggel, Jonelle L. Walsh, Arash Bahramian, Holger Baumgardt, Jean Brodie, Igor Chilingarian, Laura Chomiuk, Mark den Brok, Matthias Frank, Michael Hilker, Richard M. McDermid, Steffen Mieske, Nadine Neumayer, Dieu D. Nguyen, Renuka Pechetti, Aaron J. Romanowsky, and Lee Spitler |
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| 245 | 1 | 4 | |a The black hole in the most massive ultracompact dwarf galaxy M59-UCD3 |c Christopher P. Ahn, Anil C. Seth, Michele Cappellari, Davor Krajnović, Jay Strader, Karina T. Voggel, Jonelle L. Walsh, Arash Bahramian, Holger Baumgardt, Jean Brodie, Igor Chilingarian, Laura Chomiuk, Mark den Brok, Matthias Frank, Michael Hilker, Richard M. McDermid, Steffen Mieske, Nadine Neumayer, Dieu D. Nguyen, Renuka Pechetti, Aaron J. Romanowsky, and Lee Spitler |
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| 520 | |a We examine the internal properties of the most massive ultracompact dwarf galaxy (UCD), M59-UCD3, by combining adaptive-optics-assisted near-IR integral field spectroscopy from Gemini/NIFS and Hubble Space Telescope (HST) imaging. We use the multiband HST imaging to create a mass model that suggests and accounts for the presence of multiple stellar populations and structural components. We combine these mass models with kinematics measurements from Gemini/NIFS to find a best-fit stellar mass-to-light ratio (M/L) and black hole (BH) mass using Jeans anisotropic models (JAMs), axisymmetric Schwarzschild models, and triaxial Schwarzschild models. The best-fit parameters in the JAM and axisymmetric Schwarzschild models have BHs between 2.5 and 5.9 million solar masses. The triaxial Schwarzschild models point toward a similar BH mass but show a minimum χ 2 at a BH mass of ∼0. Models with a BH in all three techniques provide better fits to the central V rms profiles, and thus we estimate the BH mass to be M ⊙ (estimated 1σ uncertainties). We also present deep radio imaging of M59-UCD3 and two other UCDs in Virgo with dynamical BH mass measurements, and we compare these to X-ray measurements to check for consistency with the fundamental plane of BH accretion. We detect faint radio emission in M59cO but find only upper limits for M60-UCD1 and M59-UCD3 despite X-ray detections in both these sources. The BH mass and nuclear light profile of M59-UCD3 suggest that it is the tidally stripped remnant of a ∼109-1010 M ⊙ galaxy. | ||
| 700 | 1 | |a Seth, Anil C. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Cappellari, Michele |e VerfasserIn |4 aut | |
| 700 | 1 | |a Krajnović, Davor |e VerfasserIn |4 aut | |
| 700 | 1 | |a Strader, Jay |e VerfasserIn |4 aut | |
| 700 | 1 | |a Voggel, Karina T. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Walsh, Jonelle L. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Bahramian, Arash |e VerfasserIn |4 aut | |
| 700 | 1 | |a Baumgardt, Holger |e VerfasserIn |4 aut | |
| 700 | 1 | |a Brodie, Jean |e VerfasserIn |4 aut | |
| 700 | 1 | |a Chilingarian, Igor |e VerfasserIn |4 aut | |
| 700 | 1 | |a Chomiuk, Laura |e VerfasserIn |4 aut | |
| 700 | 1 | |a Brok, Mark den |e VerfasserIn |4 aut | |
| 700 | 1 | |a Frank, Matthias Johannes |e VerfasserIn |0 (DE-588)1027578500 |0 (DE-627)72942703X |0 (DE-576)373414463 |4 aut | |
| 700 | 1 | |a Hilker, Michael |d 1968- |e VerfasserIn |0 (DE-588)120012715 |0 (DE-627)69630158X |0 (DE-576)291994989 |4 aut | |
| 700 | 1 | |a McDermid, Richard M. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Mieske, Steffen |e VerfasserIn |4 aut | |
| 700 | 1 | |a Neumayer, Nadine |e VerfasserIn |4 aut | |
| 700 | 1 | |a Nguyen, Dieu D. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Pechetti, Renuka |e VerfasserIn |4 aut | |
| 700 | 1 | |a Romanowsky, Aaron J. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Spitler, Lee |e VerfasserIn |4 aut | |
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