Zobrazeno 1 - 10
of 17 521
pro vyhledávání: '"BLACK HOLE PHYSICS"'
Autor:
Chandra B. Singh, Michael Williams, David Garofalo, Luis Rojas Castillo, Landon Taylor, Eddie Harmon
Publikováno v:
Universe, Vol 10, Iss 8, p 319 (2024)
Mature radio galaxies such as M87 belong to a specific subclass of active galaxies (AGN) whose evolution in time endows them with five distinguishing characteristics, including (1) low excitation emission, (2) low star formation rates, (3) high bulge
Externí odkaz:
https://doaj.org/article/420b18b464694b5a9541a957c28d2a75
Publikováno v:
Universe, Vol 10, Iss 8, p 335 (2024)
The fundamental plane of black hole activity is a very important tool to study accretion and jets. However, we found that the SEDs of AGNs and XRBs are different in the 2–10 keV energy band, and it seems inappropriate to use 2–10 keV X-ray lumino
Externí odkaz:
https://doaj.org/article/513da537e1634df8989d894e9558a24c
Publikováno v:
In New Astronomy May 2025 116
Autor:
Lev Titarchuk, Elena Seifina
Publikováno v:
Frontiers in Astronomy and Space Sciences, Vol 11 (2024)
Precise measurements of black hole (BH) masses are necessary to understand the coevolution of these sources and their host galaxies. Sometimes in the center of a galaxy, there is not one but two BHs. The BH duality of the quasar nucleus SDSS J075217.
Externí odkaz:
https://doaj.org/article/88b575ae32624ffd9d0f57147812f32f
Publikováno v:
Universe, Vol 10, Iss 5, p 225 (2024)
This white paper explores the detectability of intermediate-mass black holes (IMBHs) wandering in the Milky Way (MW) and massive local galaxies, with a particular emphasis on the role of AXIS. IMBHs, ranging within 103−6M⊙, are commonly found at
Externí odkaz:
https://doaj.org/article/9f73c2b7cab74f12a4af9e55c76ecd90
Autor:
Henric Krawczynski, Yajie Yuan, Alexander Y. Chen, Kun Hu, Nicole Rodriguez Cavero, Sohee Chun, Ephraim Gau, James F. Steiner, Michal Dovčiak
Publikováno v:
The Astrophysical Journal Letters, Vol 977, Iss 1, p L10 (2024)
The Imaging X-ray Polarimetry Explorer observations of the X-ray binary 4U 1630–47 in the high soft state revealed high linear polarization degrees (PDs) rising from 6% at 2 keV to 10% at 8 keV. We discuss in this Letter three different mechanisms
Externí odkaz:
https://doaj.org/article/0b8f2047b19b4f069df1e95d87dedf3e
Publikováno v:
The Astrophysical Journal Letters, Vol 976, Iss 1, p L13 (2024)
Relativistic jets from a Kerr black hole (BH) following the core collapse of a massive star (“collapsar”) is a leading model for gamma-ray bursts (GRBs). However, the two key ingredients for a Blandford–Znajek-powered jet—rapid rotation and a
Externí odkaz:
https://doaj.org/article/2067400d11a144b29ae32b50f900b591
Publikováno v:
The Astrophysical Journal Letters, Vol 975, Iss 2, p L40 (2024)
Light passing near a black hole can follow multiple paths from an emission source to an observer due to strong gravitational lensing. Photons following different paths take different amounts of time to reach the observer, which produces an echo signa
Externí odkaz:
https://doaj.org/article/f9f0a634b2ad481f90972802c225004d
Autor:
Abraham Loeb
Publikováno v:
The Astrophysical Journal Letters, Vol 975, Iss 1, p L15 (2024)
The Schwarzschild radii of primordial black holes (PBHs) in the mass range of 6 × 10 ^14 –4 × 10 ^19 g match the sizes of nuclei to atoms. I discuss the resulting quantum-mechanical suppression in the accretion of matter by PBHs in dense astrophy
Externí odkaz:
https://doaj.org/article/8396e4e802f74a4e98e848463d05f793
Publikováno v:
The Astrophysical Journal Letters, Vol 971, Iss 2, p L46 (2024)
Stars falling too close to massive black holes in the centers of galaxies can be torn apart by the strong tidal forces. Simulating the subsequent feeding of the black hole with disrupted material has proved challenging because of the range of timesca
Externí odkaz:
https://doaj.org/article/373d64df442b420d9aa0e1eae70d6ec0