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NGC 3621 is a late-type (Sd) spiral galaxy with an active nucleus, previously detected through mid-infrared [Ne V] line emission. Archival Hubble Space Telescope (HST) images reveal that the galaxy contains a bright and compact nuclear star…

Astrophysics · Physics 2008-12-18 A. J. Barth , L. E. Strigari , M. C. Bentz , J. E. Greene , L. C. Ho

We analyze the nuclear stellar dynamics of the SB0 galaxy NGC 1023, utilizing observational data both from the Space Telescope Imaging Spectrograph aboard the Hubble Space Telescope and from the ground. The stellar kinematics measured from…

Different massive black hole mass - host galaxy scaling relations suggest that the growth of massive black holes is entangled with the evolution of their host galaxies. The number of measured black hole masses is still limited, and…

We constrain the possible presence of a central black hole (BH) in the center of the Large Magellanic Cloud (LMC). This requires spectroscopic measurements over an area of order a square degree, due to the poorly known position of the…

Astrophysics of Galaxies · Physics 2017-09-06 H. Boyce , N. Lützgendorf , R. P. van der Marel , H. Baumgardt , M. Kissler-Patig , N. Neumayer , P. T. de Zeeuw

The inner ~200 pc region of the Milky Way contains a nuclear stellar disc and a nuclear star cluster that are embedded in the larger Galactic bar. These stellar systems overlap spatially, which makes it challenging to separate stars that…

Astrophysics of Galaxies · Physics 2025-07-16 A. Feldmeier-Krause , T. Veršič , G. van de Ven , E. Gallego-Cano , N. Neumayer

We estimate the mass of the intermediate-mass black hole at the heart of the dwarf elliptical galaxy NGC 404 using Atacama Large Millimeter/submillimeter Array (ALMA) observations of the molecular interstellar medium at an unprecedented…

We present a stellar dynamical mass measurement of the supermassive black hole in the elliptical (E1) galaxy NGC 3258. Our findings are based on integral field unit spectroscopy from the Multi Unit Spectroscopic Explorer (MUSE) observations…

Astrophysics of Galaxies · Physics 2024-07-23 Thomas K. Waters , Kayhan Gültekin , Karl Gebhardt , Neil Nagar , Vanessa Ávila

In order to improve the reverberation-mapping based estimate of the mass of the central supermassive black hole in the Seyfert 1 galaxy NGC 4151, we have reanalyzed archival ultraviolet monitoring spectra from two campaigns undertaken with…

Astrophysics · Physics 2011-02-11 Kyle G. Metzroth , Christopher A. Onken , Bradley M. Peterson

The nearby lenticular galaxy NGC 1277 is thought to host one of the largest black holes known, however the black hole mass measurement is based on low spatial resolution spectroscopy. In this paper, we present Gemini Near-infrared Integral…

We review the current state of dynamical modeling for galaxies in terms of being able to measure both the central black hole mass and stellar orbital structure. Both of these must be known adequately to measure either property. The current…

Astrophysics · Physics 2007-05-23 Karl Gebhardt

We present a new dynamical measurement of the supermassive black hole mass and intrinsic shape of the stellar halo of the massive radio galaxy NGC 315 as part of the MASSIVE survey. High signal-to-noise ratio spectra from integral-field…

Astrophysics of Galaxies · Physics 2025-07-15 Jacob Pilawa , Emily R. Liepold , Chung-Pei Ma , Jonelle L. Walsh , Jenny E. Greene

Dynamical modelling can be used to constrain the masses of central black holes; however, modelling massive galaxies is challenging due to their complexity. In this work, we report six new supermassive black hole mass measurements of massive…

We present mass estimates of supermassive black holes in six nearby fast rotating early-type galaxies (NGC4339, NGC4434, NGC4474, NGC4551, NGC4578 and NGC4762) with effective stellar velocity dispersion around 100 km/s. We use near-infrared…

Adaptive optics observations of the flattened nuclear star cluster in the nearby edge-on spiral galaxy NGC 4244 using the Gemini Near-Infrared Integral Field Spectrograph (NIFS) have revealed clear rotation. Using these kinematics plus…

Astrophysics of Galaxies · Physics 2015-06-11 F. De Lorenzi , M. Hartmann , V. P. Debattista , A. C. Seth , O. Gerhard

We present a unique set of nested stellar kinematical maps of NGC 3377 obtained with the integral-field spectrographs OASIS and SAURON. We then construct general axisymmetric dynamical models for this galaxy, based on the Schwarzschild…

Astrophysics · Physics 2007-05-23 Y. Copin , N. Cretton , E. Emsellem

The masses of the supermassive black-holes found in galaxy bulges are correlated with a multitude of galaxy properties, leading to suggestions that galaxies and black-holes may evolve together. The number of reliably measured black-hole…

Cosmology and Nongalactic Astrophysics · Physics 2013-01-31 Timothy A. Davis , Martin Bureau , Michele Cappellari , Marc Sarzi , Leo Blitz

We present a detailed dynamical analysis of the projected density and kinematical data available for the globular cluster Omega Cen. We solve the spherical anisotropic Jeans equation to predict the projected profiles of the RMS velocity in…

Astrophysics of Galaxies · Physics 2010-02-01 Roeland P. van der Marel , Jay Anderson

We introduce a novel black hole mass function which realistically models the physics of star formation and pair instability supernova with a minimal number of parameters. Applying this to all events in the LIGO-Virgo GWTC-2 catalog, we…

Cosmology and Nongalactic Astrophysics · Physics 2021-08-11 Eric J. Baxter , Djuna Croon , Samuel D. McDermott , Jeremy Sakstein

We used the PMAS integral field spectrograph to obtain large sets of radial velocities in the central regions of three northern Galactic globular clusters: M3, M13, and M92. By applying the novel technique of crowded field 3D spectroscopy,…

Solar and Stellar Astrophysics · Physics 2014-07-02 Sebastian Kamann , Lutz Wisotzki , Martin M. Roth , Joris Gerssen , Tim-Oliver Husser , Christer Sandin , Peter Weilbacher

Starting from the quasar sample of the Sloan Digital Sky Survey (SDSS) for which the CIV line is observed, we use an analysis scheme to derive the z-dependence of the maximum mass of active black holes, which overcomes the problems related…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-13 Marzia Labita , Roberto Decarli , Aldo Treves , Renato Falomo