134 citations · 829 across the 17 of their papers we have counts for
16 papers · 1 filter
The Center of the Milky Way from Radio to X-rays
A. Eckart, M. Valencia-S., B. Shahzamanian +13
We summarize basic observational results on Sagittarius~A* obtained from the radio, infrared and X-ray domain. Infrared observations have revealed that a dusty S-cluster object (DS…
Monitoring the Dusty S-Cluster Object (DSO/G2) on its Orbit towards the Galactic Center Black Hole
M. Valencia-S., A. Eckart, M. Zajacek +23
We analyse and report in detail new near-infrared (1.45 - 2.45 microns) observations of the Dusty S-cluster Object (DSO/G2) during its approach to the black hole at the center of t…
Star Formation in the vicinity of Nuclear Black Holes: Young Stellar Objects close to Sgr A*
B. Jalali, F. I. Pelupessy, A. Eckart +6
It is often assumed that the strong gravitational field of a super-massive black hole disrupts an adjacent molecular cloud preventing classical star formation in the deep potential…
Young Stellar Objects close to Sgr A*
B. Jalali, I. Pelupessy, A. Eckart +6
We aim at modelling small groups of young stars such as IRS 13N, 0.1 pc away from Sgr A*, which is suggested to contain a few embedded massive young stellar objects. We perform hyd…
The infrared K-band identification of the DSO/G2 source from VLT and Keck data
Andreas Eckart, M. Horrobin, S. Britzen +24
A fast moving infrared excess source (G2) which is widely interpreted as a core-less gas and dust cloud approaches Sagittarius A* (SgrA*) on a presumably elliptical orbit. VLT K_s-…
The Galactic Center as a Paradigm for Low Luminosity Nuclei? The K-band identification of the DSO/G2 source from VLT and Keck data
Andreas Eckart, S. Britzen, M. Horrobin +27
The super-massive 4 million solar mass black hole (SMBH) SgrA* shows flare emission from the millimeter to the X-ray domain. The nucleus of the Milky Way has properties (stellar cl…
The M_BH - sigma relation for intermediate-mass black holes in globular clusters
Nora Lützgendorf, Markus Kissler-Patig, Nadine Neumayer +6
For galaxies hosting supermassive black holes (SMBHs), it has been observed that the mass of the central black hole (M_BH) tightly correlates with the effective or central velocity…
Indication for an intermediate-mass black hole in the globular cluster NGC 5286 from kinematics
A. Feldmeier, N. Lützgendorf, N. Neumayer +6
Intermediate-mass black holes (IMBHs, 10^2-10^5 M_sun) fill the gap between stellar-mass black holes and supermassive black holes (SMBHs). Simulations have shown that IMBHs may for…
Intermediate-mass black holes in Globular Clusters
Nora Lützgendorf, Markus Kissler-Patig, Karl Gebhardt +6
For a sample of nine Galactic globular clusters we measured the inner kinematic profiles with integral-field spectroscopy that we combined with existing outer kinematic measurement…
Limits on intermediate-mass black holes in six Galactic globular clusters with integral-field spectroscopy
Nora Lützgendorf, Markus Kissler-Patig, Karl Gebhardt +6
The formation of supermassive black holes at high redshift still remains a puzzle to astronomers. Their growth becomes reasonable only when starting from a massive seed black hole…
High-velocity stars in the cores of globular clusters: The illustrative case of NGC 2808
Nora Lützgendorf, Alessia Gualandris, Markus Kissler-Patig +7
We report the detection of five high-velocity stars in the core of the globular cluster NGC 2808. The stars lie on the the red giant branch and show total velocities between 40 and…
Central kinematics of the globular cluster NGC 2808: Upper limit on the mass of an intermediate-mass black hole
Nora Lützgendorf, Markus Kissler-Patig, Karl Gebhardt +5
Globular clusters are an excellent laboratory for stellar population and dynamical research. Recent studies have shown that these stellar systems are not as simple as previously as…
The S-Star Cluster at the Center of the Milky Way: On the nature of diffuse NIR emission in the inner tenth of a parsec
Nadeen Sabha, Andreas Eckart, David Merritt +9
Sagittarius A*, the super-massive black hole at the center of the Milky Way, is surrounded by a small cluster of high velocity stars, known as the S-stars. We aim to constrain the…
A Dynamical N-body Model for the Central Region of Centauri
B. Jalali, H. Baumgardt, M. Kissler-Patig +4
Supermassive black holes (SMBHs) are fundamental keys to understand the formation and evolution of their host galaxies. However, the formation and growth of SMBHs are not yet well…
Kinematic signature of an intermediate-mass black hole in the globular cluster NGC 6388
N. Lützgendorf, M. Kissler-Patig, E. Noyola +4
Intermediate-mass black holes (IMBHs) are of interest in a wide range of astrophysical fields. In particular, the possibility of finding them at the centers of globular clusters ha…
VLT Kinematics for omega Centauri: Further Support for a Central Black Hole
Eva Noyola, Karl Gebhardt, Markus Kissler-Patig +4
The Galactic globular cluster omega Centauri is a prime candidate for hosting an intermediate mass black hole. Recent measurements lead to contradictory conclusions on this issue.…