Results 31 to 40 of about 6,310 (180)
Quantum Aspects of Black Holes [PDF]
, 2006 In this thesis we study two quantum aspects of black holes, their entropy and the Hawking effect. First, we present a model for the statistical interpretation of black hole entropy and show that this entropy emerges as a result of missing information ...
Deeg, Dorothea
core
How Supermassive Black Holes Shape Galaxies
, 2023 We often think of black holes as mysterious objects that swallow everything that passes by them—from dust to entire stars. In reality, black holes “eat” in a messy way, while spinning around super quickly.
core +1 more source
Supermassive black holes in galactic bulges [PDF]
Monthly Notices of the Royal Astronomical Society: Letters, 2008 Abstract Growing evidence indicate supermassive black holes (SMBHs) in a mass range of MBH∼ 106–1010 M⊙ lurking in central stellar bulges of galaxies. Extensive observations reveal fairly tight power laws of MBH versus the mean stellar velocity dispersion σ of the host stellar bulge.
Lou, Yu-Qing, Jiang, Yan-Fei
openaire +2 more sources
Axion Black Hole Solution in Non‐Metricity Gravity
Fortschritte der Physik, Volume 74, Issue 2, February 2026.Abstract A static, spherically symmetric black hole solution in symmetric teleparallel (non‐metricity) gravity sourced by an axion field is constructed. Starting from the modified field equations, exact configurations are obtained characterized by the mass M$M$ and an axion–geometry coupling β$\beta$, with temporal metric function A(r)=1−2Mr+βr$A(r)=1-\
A. Eid, G.G.L. Nashed
wiley +1 more source
Eötvös experiments with supermassive black holes [PDF]
Monthly Notices of the Royal Astronomical Society, 2016 By examining the locations of central black holes in two elliptical galaxies, M\,32 and M\,87, we derive constraints on the violation of the strong equivalence principle for purely gravitational objects, i.e. black holes, of less than about two-thirds, $η_N<0.68$ from the gravitational interaction of M\,87 with its neighbours in the Virgo cluster ...
Asvathaman, Asha +2 more
openaire +1 more source
Advances in Astronomy, Volume 2026, Issue 1, 2026.We examine the weak cosmic censorship conjecture (WCCC) violation by throwing a charged and rotating test particle into a Kerr–Newman–modified gravity black hole (KN–MOG BH). The result depends on several factors, such as the relative sign of the particle’s charge and its direction of rotation with respect to black hole (BH).
Waqar Ahmad +2 more
wiley +1 more source
Braneworld black holes and black strings [PDF]
, 2008 This thesis involves the study of strong and weak gravity phenomenology within the braneworld paradigm. We begin with a general overview of the hypothesised concept of extra spatial dimensions and explain why they are so interesting.
Mistry, Bina
core
Episodic ejection from super-massive black holes
, 2006 Episodic activity in super-massive black holes is shown by radio galaxies exhibiting ‘double-double’ radio morphologies (Subrahmanyan et al. 1996, Schoenmakers et al. 2000). Spectacular examples showing a renewal of beam activity in the form of new beams
Subrahmanyan, Ravi +2 more
core +1 more source
Supermassive black holes in the early Universe [PDF]
Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences, 2015 The recent discovery of the ultraluminous quasar SDSS J010013.02+280225.8 at redshift 6.3 has exacerbated the time compression problem implied by the appearance of supermassive black holes only approximately 900 Myr after the big bang, and only approximately 500 Myr beyond the formation of Pop II and III stars.
F. Melia, T. M. McClintock
openaire +2 more sources
The GLEAMing of the first supermassive black holes
Publications of the Astronomical Society of Australia, 2020 AbstractWe present the results of a new selection technique to identify powerful ($L_{\rm 500\,MHz} \gt 10^{27}\,\text{WHz}^{-1}$) radio galaxies towards the end of the Epoch of Reionisation. Our method is based on the selection of bright radio sources showing radio spectral curvature at the lowest frequency (${\sim}100\,\text{MHz}$) combined with the ...
Guillaume Drouart +9 more
openaire +5 more sources