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S. Nandi
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Volume 32 Issue 4 December 2011 pp 471-474
A Multifrequency Study of Five Large Radio Galaxies
A. Pirya S. Nandi D. J. Saikia C. Konar M. Singh
We present the results of GMRT and VLA observations of five large radio sources over a wide frequency range to investigate their structural and spectral asymmetries. The hot-spot brightness ratios suggest intrinsic source asymmetries, while the spectral indices show evidence of re-acceleration of particles.
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Volume 32 Issue 4 December 2011 pp 477-486
The Dynamics of Radio Galaxies and Double–Double Radio Galaxies
C. Konar M. Jamrozy M. J. Hardcastle J. H. Croston S. Nandi D. J. Saikia J. Machalski
Relativistic and magnetized plasma ejected by radio loud AGNs through jets form the diffuse lobes of radio galaxies. The radiating particles (electron/electron–positron) in lobes emit in radio via the synchrotron process and X-ray via inverse-Compton scattering of cosmic microwave background photons. The thermal environment around radio galaxies emits X-rays via the thermal bremsstrahlung process. By combining information from these processes we can measure physical conditions in and around the radio lobes and thus study the dynamics of radio galaxies, including double–double radio galaxies.
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Volume 32 Issue 4 December 2011 pp 487-490
The Double–Double Radio Galaxy 3C293
S. A. Joshi S. Nandi D. J. Saikia C. H. Ishwara-Chandra C. Konar
We present the results of radio continuum observations at frequencies ranging from ∼ 150–5000 MHz of the misaligned double–double radio galaxy (DDRG) 3C293 (J1352+3126) using the GMRT and the VLA, and estimate the time-scale of interruption of jet activity to be less than ∼ 0.1 Myr.
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Journal of Astrophysics and Astronomy
Volume 44, 2023
All articles
Continuous Article Publishing mode
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Journal of Astrophysics and Astronomy | News
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Continuous Article Publication
Posted on January 27, 2016Since January 2016, the Journal of Astrophysics and Astronomy has moved to Continuous Article Publishing (CAP) mode. This means that each accepted article is being published immediately online with DOI and article citation ID with starting page number 1. Articles are also visible in Web of Science immediately. All these have helped shorten the publication time and have improved the visibility of the articles.
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Editorial Note on Continuous Article Publication
Posted on July 25, 2019Click here for Editorial Note on CAP Mode
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