Zobrazeno 1 - 10
of 159
pro vyhledávání: '"Ghosh, Ritesh"'
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
Autor:
Ghosh, Ritesh, Shovkovy, Igor A.
We employ first-principles quantum field theoretical methods to investigate the longitudinal and transverse electrical conductivities of a strongly magnetized hot QED plasma at the leading order in coupling. The analysis utilized the fermion damping
Externí odkaz:
http://arxiv.org/abs/2404.01388
Autor:
Ghosh, Ritesh, Shovkovy, Igor A.
We derive a general expression for the fermion self-energy in a hot magnetized plasma by using the Landau-level representation. In the one-loop approximation, the Dirac structure of the self-energy is characterized by five different functions that de
Externí odkaz:
http://arxiv.org/abs/2402.04307
Publikováno v:
Phys.Rev.D 109, L011503 (2024)
The Gribov-Zwanziger prescription applied within Yang-Mills theory is demonstrated to be an efficient method for refining the theory's infrared dynamics. We study the collisional energy loss experienced by a high-energetic test parton as it traverses
Externí odkaz:
http://arxiv.org/abs/2311.16005
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
Impact of chiral asymmetry and magnetic field on passage of an energetic test parton in a QCD medium
Publikováno v:
Phys. Rev. D 108, 054035 (2023)
We study the dependence of collisional energy loss of a test parton moving with a high velocity on the chiral imbalance and magnetic field in the QCD medium. A semi-classical approach is adopted to estimate the parton energy loss that takes into acco
Externí odkaz:
http://arxiv.org/abs/2306.10247
Publikováno v:
Eur. Phys. J. C 84, 313 (2024)
Gribov-Zwanziger prescription in Yang-Mills theory improves the infrared dynamics. In this work, we study the static potential of a heavy quark-antiquark pair with the HTL resummed perturbation method within the Gribov-Zwanziger approach at finite te
Externí odkaz:
http://arxiv.org/abs/2305.16250
Autor:
Ghosh, Ritesh, Kurian, Manu
Publikováno v:
Phys. Rev. C 107, 034903 (2023)
Electric charge transport of hadronic matter at finite temperature and magnetic field is studied within the linear sigma model. Anisotropic transport coefficients associated with the charge transport are estimated both in the weak and strong regimes
Externí odkaz:
http://arxiv.org/abs/2211.06729
Autor:
Ghosh, Ritesh, Laha, Sibasish, Deshmukh, Kunal, Bhalerao, Varun, Dewangan, Gulab C., Chatterjee, Ritaban
We have studied the nature and origin of the soft X-ray excess detected in the interesting changing-look AGN (CLAGN) Mrk~590 using two decades of multi-wavelength observations from \xmm{}, \suzaku{}, \swift{} and \nustar{}. In the light of vanishing
Externí odkaz:
http://arxiv.org/abs/2208.04067
Publikováno v:
Phys. Rev. D 106, 116006 (2022)
We study the collective modes of gluons in an anisotropic thermal medium in the presence of a constant background magnetic field using the hard-thermal loop (HTL) perturbation theory. The momentum space anisotropy of the medium has been incorporated
Externí odkaz:
http://arxiv.org/abs/2204.09646