Matches in SemOpenAlex for { <https://semopenalex.org/work/W1915403750> ?p ?o ?g. }
- W1915403750 endingPage "1816" @default.
- W1915403750 startingPage "1792" @default.
- W1915403750 abstract "We present a dynamical analysis to infer the structural parameters and properties of the two nearby, compact, high velocity dispersion galaxies MRK1216 & NGC1277. Combining deep HST imaging, wide-field IFU stellar kinematics, and complementary long-slit spectroscopic data out to 3 R_e, we construct orbit-based models to constrain their black hole masses, dark matter content and stellar mass-to-light ratios. We obtain a black hole mass of log(Mbh/Msun) = 10.1(+0.1/-0.2) for NGC1277 and an upper limit of log(Mbh/Msun) = 10.0 for MRK1216, within 99.7 per cent confidence. The stellar mass-to-light ratios span a range of Upsilon_V = 6.5(+1.5/-1.5) in NGC1277 and Upsilon_H = 1.8(+0.5/-0.8) in MRK1216 and are in good agreement with SSP models of a single power-law Salpeter IMF. Even though our models do not place strong constraints on the dark halo parameters, they suggest that dark matter is a necessary ingredient in MRK1216, with a dark matter contribution of 22(+30/-20) per cent to the total mass budget within 1 R_e. NGC1277, on the other hand, can be reproduced without the need for a dark halo, and a maximal dark matter fraction of 13 per cent within the same radial extent. In addition, we investigate the orbital structures of both galaxies, which are rotationally supported and consistent with photometric multi-S'ersic decompositions, indicating that these compact objects do not host classical, non-rotating bulges formed during recent (z <= 2) dissipative events or through violent relaxation. Finally, both MRK 1216 and NGC 1277 are anisotropic, with a global anisotropy parameter delta of 0.33 and 0.58, respectively. While MRK 1216 follows the trend of fast-rotating, oblate galaxies with a flattened velocity dispersion tensor in the meridional plane of the order of beta_z = delta, NGC 1277 is highly tangentially anisotropic and seems to belong kinematically to a distinct class of objects." @default.
- W1915403750 created "2016-06-24" @default.
- W1915403750 creator A5001553407 @default.
- W1915403750 creator A5023699178 @default.
- W1915403750 creator A5026266948 @default.
- W1915403750 creator A5033875500 @default.
- W1915403750 creator A5038068614 @default.
- W1915403750 creator A5051770664 @default.
- W1915403750 creator A5054559636 @default.
- W1915403750 creator A5078390799 @default.
- W1915403750 date "2015-07-17" @default.
- W1915403750 modified "2023-09-30" @default.
- W1915403750 title "MRK 1216 and NGC 1277 – an orbit-based dynamical analysis of compact, high-velocity dispersion galaxies" @default.
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