Zobrazeno 1 - 10
of 569
pro vyhledávání: '"Begelman, Mitchell C."'
The presence of a strong, large-scale magnetic field in an accretion flow leads to extraction of the rotational energy of the black hole (BH) through the Blandford-Znajek (BZ) process, believed to power relativistic jets in various astrophysical sour
Externí odkaz:
http://arxiv.org/abs/2411.02515
Autor:
Scepi, Nicolas, Dexter, Jason, Begelman, Mitchell C., Marcel, Grégoire, Ferreira, Jonathan, Petrucci, Pierre-Olivier
X-ray binaries (XRBs) exhibit spectral hysteresis for luminosities in the range $10^{-2}\lesssim L/L_\mathrm{Edd}\lesssim 0.3$, with a hard X-ray spectral state that persists from quiescent luminosities up to $\gtrsim 0.3L_\mathrm{Edd}$, transitionin
Externí odkaz:
http://arxiv.org/abs/2410.12920
Autor:
Gorbunov, Evgeny A., Bacchini, Fabio, Zhdankin, Vladimir, Werner, Gregory R., Begelman, Mitchell C., Uzdensky, Dmitri A.
We present the largest 3D Particle-in-Cell shearing-box simulations of turbulence driven by the magnetorotational instability, for the first time employing the realistic proton-to-electron mass ratio. We investigate the energy partition between relat
Externí odkaz:
http://arxiv.org/abs/2410.02872
Autor:
Meyer, Eileen T., Laha, Sibasish, Shuvo, Onic I., Roychowdhury, Agniva, Green, David A., Rhodes, Lauren, Hankla, Amelia M., Philippov, Alexander, Mbarek, Rostom, laor, Ari, Begelman, Mitchell C., Sadaula, Dev R., Ghosh, Ritesh, Bruni, Gabriele, Panessa, Francesca, Guainazzi, Matteo, Behar, Ehud, Masterson, Megan, Zhang, Haocheng, Yang, Xiaolong, Gurwell, Mark A., Keating, Garrett K., Williams-Baldwin, David, Bray, Justin D., Bempong-Manful, Emmanuel K., Wrigley, Nicholas, Bianchi, Stefano, Ricci, Federica, La Franca, Fabio, Kara, Erin, Georganopoulos, Markos, Oates, Samantha, Nicholl, Matt, Pal, Main, Cenko, S. Bradley
We present multi-frequency (5-345 GHz) and multi-resolution radio observations of 1ES 1927+654, widely considered one of the most unusual and extreme changing-look active galactic nuclei (CL-AGN). The source was first designated a CL-AGN after an opt
Externí odkaz:
http://arxiv.org/abs/2406.18061
JWST observations demonstrate that supermassive black holes (SMBHs) exist by redshifts $z \gtrsim 10$, providing further evidence for "direct collapse" black hole (BH) formation, whereby massive ($\sim 10^{3-5} M_{\odot}$) SMBH seeds are generated wi
Externí odkaz:
http://arxiv.org/abs/2405.00084
Autor:
Begelman, Mitchell C.
We present an analytic, quasi-local model for accretion discs threaded by net, vertical magnetic flux. In a simple slab geometry and ignoring stochastic mean-field dynamo effects, we calculate the large-scale field resulting from the balance between
Externí odkaz:
http://arxiv.org/abs/2402.15657
Autor:
Sullivan, Andrew G., Blandford, Roger D., Begelman, Mitchell C., Birkinshaw, Mark, Readhead, Anthony C. S.
Double lobe radio sources associated with active galactic nuclei represent one of the longest studied groups in radio astronomy. A particular sub-group of double radio sources comprises the compact symmetric objects (CSOs). CSOs are distinguished by
Externí odkaz:
http://arxiv.org/abs/2401.14399
Autor:
Bacchini, Fabio, Zhdankin, Vladimir, Gorbunov, Evgeny A., Werner, Gregory R., Arzamasskiy, Lev, Begelman, Mitchell C., Uzdensky, Dmitri A.
We present 3D fully kinetic shearing-box simulations of pair-plasma magnetorotational turbulence with unprecedented macro-to-microscopic scale separation. While retrieving the expected fluid behavior of the plasma at large scales, we observe a steepe
Externí odkaz:
http://arxiv.org/abs/2401.01399
Autor:
Ghosh, Ritesh, Laha, Sibasish, Meyer, Eileen, Roychowdhury, Agniva, Yang, Xiaolong, Pulido, J. A. Acosta, Rakshit, Suvendu, Pandey, Shivangi, Gonzalez, Josefa Becerra, Behar, Ehud, Gallo, Luigi C., Panessa, Francesca, Bianchi, Stefano, La Franca, Fabio, Scepi, Nicolas, Begelman, Mitchell C., Longinotti, Anna Lia, Lusso, Elisabeta, Oates, Samantha, Nicholl, Matt, Cenko, S. Bradley, Connor, Brendan O, Hammerstein, Erica, Jose, Jincen, Gabanyi, Krisztina Eva, Ricci, Federica, Chattopadhyay, Sabyasachi
1ES1927+654 is a nearby active galactic nucleus that has shown an enigmatic outburst in optical/UV followed by X-rays, exhibiting strange variability patterns at timescales of months-years. Here we report the unusual X-ray, UV, and radio variability
Externí odkaz:
http://arxiv.org/abs/2308.03602