Zobrazeno 1 - 10
of 250
pro vyhledávání: '"Nityananda, Rajaram"'
Aperture synthesis observations with full polarisation have long been used to study the magnetic fields of synchrotron emitting sources. Recently proposed closure invariants give us a powerful method for extracting information from measured visibilit
Externí odkaz:
http://arxiv.org/abs/2407.00583
Publikováno v:
Physical Review Letters, 128, 091101 (2022)
The discovery of magnetic fields close to the M87 black hole using Very Long Baseline Interferometry (VLBI) by the Event Horizon Telescope collaboration utilized the novel concept of "closure traces", that are immune to element-based aberrations. We
Externí odkaz:
http://arxiv.org/abs/2108.11400
Publikováno v:
Physical Review D, 105, 043019 (2022)
An $N$-element interferometer measures correlations among pairs of array elements. Closure invariants associated with closed loops among array elements are immune to multiplicative, element-based ("local") corruptions that occur in these measurements
Externí odkaz:
http://arxiv.org/abs/2108.11399
Autor:
Narayanan, Andal, Nityananda, Rajaram
Publikováno v:
Current Science, 2020 Dec . 119(12), 2028-2029.
Externí odkaz:
https://www.jstor.org/stable/27229972
Autor:
Nityananda, Rajaram
Publikováno v:
Current Science, 2020 Jan . 118(2), 175-176.
Externí odkaz:
https://www.jstor.org/stable/27226313
Publikováno v:
Contrib. Plasma Phys. 55, No. 1, 3 - 11 (2015)
Certain recent semi-classical theories of spin-half quantum plasmas are examined with regard to their internal consistency, physical applicability and relevance to fusion, astrophysical and condensed matter plasmas. It is shown that the derivations a
Externí odkaz:
http://arxiv.org/abs/1407.6865
Autor:
Nityananda, Rajaram, Konar, Sushan
Publikováno v:
Phys. Rev. D 91, 028301 (2015)
The super-massive white dwarf models proposed by Das & Mukhopadhyaya [Phys. Rev. D 86 042001 (2012)], based on modifying the equation of state by a super-strong magnetic field in the centre, are very far from equilibrium because of the neglect of Lor
Externí odkaz:
http://arxiv.org/abs/1405.4719
Publikováno v:
Phys. Rev. Lett. 112, 129501, March 2014
A comment on the Letter by S. Braun, F. A. Asenjo and S. M. Mahajan, Phys. Rev. Lett., 109, 175003 (2012). We show that recent arguments for light amplification driven by inhomogeneous quantum spin fields in low temperature electron plasmas in metals
Externí odkaz:
http://arxiv.org/abs/1403.0228
In this Letter certain fundamental physics issues relating to recent theories of so-called `spin quantum plasmas' are examined. It is shown that the derivations and some of the results obtained in these theories contradict well-established principles
Externí odkaz:
http://arxiv.org/abs/1306.1774
Autor:
Nityananda, Rajaram, Konar, Sushan
Publikováno v:
Phys. Rev. D 89, 103017 (2014); Erratum : Phys. Rev. D 99, 029904 (2015)
We show that recently proposed white dwarf models with masses well in excess of the Chandrasekhar limit, based on modifying the equation of state by a super-strong magnetic field in the centre, are very far from equilibrium because of the neglect of
Externí odkaz:
http://arxiv.org/abs/1306.1625