Results 31 to 40 of about 135,505 (333)
Detection of compact objects by means of gravitational lensing in binary systems [PDF]
, 2002 We consider the gravitational magnification of light for binary systems containing two compact objects: white dwarfs, a white dwarf and a neutron star or a white dwarf and a black hole.
A. V. Tuntsov +50 more
core +2 more sources
Identification and Characterization of a Large Sample of Distant Active Dwarf Galaxies in XMM-SERVS
The Astrophysical Journal, 2023 Active dwarf galaxies are important because they contribute to the evolution of dwarf galaxies and can reveal their hosted massive black holes. However, the sample size of such sources beyond the local universe is still highly limited.
Fan Zou +12 more
doaj +1 more source
Infrared signature of active massive black holes in nearby dwarf galaxies [PDF]
, 2017 We investigate the possible presence of active galactic nuclei (AGN) in dwarf galaxies and other nearby galaxies to identify candidates for follow-up confirmation and dynamical mass measurements.
Bianconi, Matteo +3 more
core +1 more source
Multimessenger Signatures of Massive Black Holes in Dwarf Galaxies [PDF]
Monthly Notices of the Royal Astronomical Society, 2018 Recent discoveries of massive black holes (MBHs) in dwarf galaxies suggest that they may have a more common presence than once thought. Systematic searches are revealing more candidates, but this process could be accelerated by predictions from simulations.
Jillian Bellovary +9 more
openaire +3 more sources
Hierarchical merger of primordial black holes in dwarf galaxies
Journal of Cosmology and Astroparticle Physics, 2022 Abstract We study the merger history of primordial black holes (PBHs) in a scenario where they represent the dominant dark matter component of a typical dwarf galaxies' core. We investigate the possibility of a sequence of collisions resulting in a hierarchical merger of black holes, and look at the final mass spectrum in such clusters ...
Erfani, Encieh +2 more
openaire +2 more sources
QPOs in Cataclysmic Variables and in X-ray Binaries [PDF]
, 2005 Recent observations, reported by Warner and Woudt, of Dwarf Nova Oscillations (DNOs) exhibiting frequency drift, period doubling, and 1:2:3 harmonic structure, can be understood as disc oscillations that are excited by perturbations at the spin frequency
Abramowicz +32 more
core +4 more sources
The origins of off-centre massive black holes in dwarf galaxies [PDF]
Monthly Notices of the Royal Astronomical Society, 2021 ABSTRACT Massive black holes often exist within dwarf galaxies, and both simulations and observations have shown that a substantial fraction of these may be off-centre with respect to their hosts. We trace the evolution of off-centre massive black holes (MBHs) in dwarf galaxies using cosmological hydrodynamical simulations, and show that
Jordan Van Nest +12 more
openaire +3 more sources
Gas heating from spinning and non-spinning evaporating primordial black holes
Physics Letters B, 2021 Primordial black holes (PBHs) from the early Universe constitute a viable dark matter (DM) candidate and can span many orders of magnitude in mass. Light PBHs with masses around 1015 g contribute to DM and will efficiently evaporate through Hawking ...
Ranjan Laha +2 more
doaj +1 more source
On central black holes in ultra-compact dwarf galaxies [PDF]
Astronomy & Astrophysics, 2013 16 pages, 8 figures, A&A in ...
Mieske, S. +5 more
openaire +3 more sources
Acta Agrobotanica, 2018 Selected cultivars of Asian brassicacean vegetables were evaluated for their yield potential and susceptibility to bacterial infection. Chinese broccoli, two cultivars of Chinese cabbage (‘Dwarf milk cabbage’ and improved ‘Tahtsai’), and mizuna were ...
Tomáš Kopta +3 more
doaj +1 more source