Results 151 to 160 of about 9,238,867 (222)

Signature of a Seyfert-like Component in Blazar 3C 273 and Its Reflection-based Explanation

The Astrophysical Journal
We present the results of blazar 3C 273 from simultaneous observations obtained using the XMM-Newton and NuSTAR satellites during the period 2015–2019 in five epochs. When the spectra are modeled with a power law, significant residuals arise below ∼2 keV
Haritma Gaur, Main Pal, Muhammad S. Anjum, Kiran Wani, Pankaj Kushwaha, Ashwani Pandey, Liang Chen   +6 more
doaj   +1 more source

X-ray emission mechanisms in active galactic nuclei

, 2016
Active Galactic Nuclei (AGN) are compact regions at the centre of active galaxies which are visible across the full electromagnetic spectrum. Their radiation comes from the accretion of matter onto a supermassive black hole. They are particularly bright in X-rays, showing several components in their spectra.
openaire   +2 more sources

Cosmic ray feedback in galaxies and galaxy clusters: A pedagogical introduction and a topical review of the acceleration, transport, observables, and dynamical impact of cosmic rays. [PDF]

Astron Astrophys Rev, 2023
Ruszkowski M, Pfrommer C.
europepmc   +1 more source

Jets from a stellar-mass black hole are as relativistic as those from supermassive black holes. [PDF]

Nat Commun
Zhang X, Yu W, Carotenuto F, Fender R, Motta S, Bahramian A, Miller-Jones JCA, Russell TD, Corbel S, Woudt PA, Atri P, Knigge C, Sivakoff GR, Hughes AK, van den Eijnden J, Matthews JH, Baglio MC, Saikia P.   +17 more
europepmc   +1 more source

Origin of radio emission from nearby low-luminosity active galactic nuclei

, 2005
We use the observational data in radio, optical, and X-ray wave bands for a sample of active galactic nuclei (AGNs) with measured black hole masses to explore the origin of radio emission from nearby low-luminosity active galactic nuclei (LLAGNs).
Wu, QW, Cao, XW
core  

Imaging black holes: a VLBI success story. [PDF]

Astrophys Space Sci
Zensus JA.
europepmc   +1 more source

Reverberation lags viewed in hard X-rays from an accreting stellar-mass black hole. [PDF]

Nat Commun
You B, Yu W, Ingram A, De Marco B, Qu JL, Zhu ZH, Santangelo A, Xu SE.   +7 more
europepmc   +1 more source

Super-Critical Accretion onto Stellar Mass Black Holes and Neutron Stars: A Short Review. [PDF]

Space Sci Rev
Middleton M, Lipunova G, Ohsuga K, Abramowicz M.   +3 more
europepmc   +1 more source

Accurate determination of chemical abundances near a supermassive black hole. [PDF]

Nat Astron
XRISM Collaboration.
europepmc   +1 more source

Reduced gas accretion onto galaxies due to effects of external giant radio lobes. [PDF]

Proc Natl Acad Sci U S A
Qiu Y, Cen R.
europepmc   +1 more source