scholarly journals Intermediate-mass Black Holes and Dark Matter at the Galactic Center

2018 ◽  
Vol 853 (1) ◽  
pp. L16 ◽  
Author(s):  
Thomas Lacroix ◽  
Joseph Silk
Keyword(s):  
Black Holes ◽  
Dark Matter ◽  
Galactic Center ◽  
Intermediate Mass ◽  
Intermediate Mass Black Holes

scholarly journals Intermediate-mass black holes in globular clusters: observations and simulations - Update

2015 ◽  
Vol 12 (S316) ◽  
pp. 240-245
Author(s):  
Nora Lützgendorf ◽  
Markus Kissler-Patig ◽  
Karl Gebhardt ◽  
Holger Baumgardt ◽  
Diederik Kruijssen ◽  
...  
Keyword(s):  
Black Holes ◽  
Black Hole ◽  
Globular Clusters ◽  
Galactic Center ◽  
Early Stage ◽  
Life Time ◽  
Intermediate Mass ◽  
Software Environment ◽  
Integral Field ◽  
Intermediate Mass Black Holes

AbstractThe study of intermediate-mass black holes (IMBHs) is a young and promising field of research. If IMBH exist, they could explain the rapid growth of supermassive black holes by acting as seeds in the early stage of galaxy formation. Formed by runaway collisions of massive stars in young and dense stellar clusters, intermediate-mass black holes could still be present in the centers of globular clusters, today. We measured the inner kinematic profiles with integral-field spectroscopy for 10 Galactic globular cluster and determined masses or upper limits of central black holes. In combination with literature data we further studied the positions of our results on known black-hole scaling relations (such as M• − σ) and found a similar but flatter correlation for IMBHs. Applying cluster evolution codes, the change in the slope could be explained with the stellar mass loss occurring in clusters in a tidal field over its life time. Furthermore, we present results from several numerical simulations on the topic of IMBHs and integral field units (IFUs). N-body simulations were used to simulate IFU data cubes. For the specific case of NGC 6388 we simulated two different IFU techniques and found that velocity dispersion measurements from individual velocities are strongly biased towards lower values due to blends of neighbouring stars and background light. In addition, we use the Astrophysical Multipurpose Software Environment (AMUSE) to combine gravitational physics, stellar evolution and hydrodynamics to simulate the accretion of stellar winds onto a black hole. We find that the S-stars need to provide very strong winds in order to explain the accretion rate in the galactic center.

scholarly journals Dark matter annihilation around intermediate mass black holes: an update

2009 ◽  
Vol 11 (10) ◽  
pp. 105016 ◽  
Author(s):  
Gianfranco Bertone ◽  
Mattia Fornasa ◽  
Marco Taoso ◽  
Andrew R Zentner
Keyword(s):  
Black Holes ◽  
Dark Matter ◽  
Intermediate Mass ◽  
Dark Matter Annihilation ◽  
Intermediate Mass Black Holes

scholarly journals Primordial intermediate mass black holes as dark matter

2020 ◽  
Vol 35 (36) ◽  
pp. 2044028
Author(s):  
Paul H. Frampton
Keyword(s):  
Black Holes ◽  
Dark Matter ◽  
Magellanic Clouds ◽  
Experimental Confirmation ◽  
Particle Theory ◽  
Intermediate Mass ◽  
Intermediate Mass Black Holes

Among particle theory candidates for the dark matter constituents. Axions and WIMPs are the most popular. In this paper, we discuss these then focus on our preferred astrophysical candidate, the Primordial Intermediate Mass Black Holes in the acronym DM[Formula: see text]=[Formula: see text]PIMBHs. The earliest experimental confirmation may come from microlensing of the Magellanic Clouds at the LSST 8 m telescope in the mid-2020s, or possibly a few years earlier in 2021 from work being pursued, using DECam data from the smaller Blanco 4 m telescope, at LLNL.

scholarly journals Theory of dark matter

2017 ◽  
Vol 32 (19) ◽  
pp. 1730013
Author(s):  
Paul H. Frampton
Keyword(s):  
Black Holes ◽  
Dark Matter ◽  
Angular Momentum ◽  
Galactic Halo ◽  
Weakly Interacting Massive Particles ◽  
Intermediate Mass ◽  
Massive Particles ◽  
The Status ◽  
Intermediate Mass Black Holes

We discuss the hypothesis that the constituents of dark matter in the galactic halo are primordial intermediate-mass black holes (PIMBHs). The status of axions and weakly interacting massive particles (WIMPs) is discussed, as are the methods for detecting PIMBHs with emphasis on microlensing. The role of the angular momentum [Formula: see text] of the PIMBHs in their escaping previous detection is considered.

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