Search Results - "Dwivedi, Bhola N."
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High-frequency torsional Alfvén waves as an energy source for coronal heating
Published in Scientific reports (03-03-2017)“…The existence of the Sun’s hot atmosphere and the solar wind acceleration continues to be an outstanding problem in solar-astrophysics. Although…”
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On the radial acceleration of disc galaxies
Published in Monthly notices of the Royal Astronomical Society (21-05-2020)“…ABSTRACT The physical processes defining the dynamics of disc galaxies are still poorly understood. Hundreds of articles have appeared in the literature over…”
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A physical process of the radial acceleration of disc galaxies
Published in Monthly notices of the Royal Astronomical Society (01-03-2018)“…Abstract An impact model of gravity designed to emulate Newton's law of gravitation is applied to the radial acceleration of disc galaxies. Based on this model…”
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CME Productive and Non-productive Recurring Jets Near an Active Region AR11176
Published in Solar physics (01-02-2020)“…We study the recurring jets near AR11176 during the period 2011 March 31 17:00 UT to April 1 05:00 UT using observations from the Atmospheric Imaging Assembly…”
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Two-fluid Numerical Simulations of Solar Spicules
Published in The Astrophysical journal (10-11-2017)“…We aim to study the formation and evolution of solar spicules by means of numerical simulations of the solar atmosphere. With the use of newly developed JOANNA…”
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Gravitational redshift and the vacuum index of refraction
Published in Astrophysics and space science (01-02-2019)“…A physical process of the gravitational redshift was described in an earlier paper (Wilhelm and Dwivedi, New Astron. 31:8, 2014 ). This process did not require…”
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Inference of magnetic field in the coronal streamer invoking kink wave motions generated by multiple EUV waves
Published in Monthly notices of the Royal Astronomical Society (01-12-2016)“…We analyse the observations from Solar TErrestrial RElations Observatory (STEREO) of an oscillating coronal streamer. STEREO-B Extreme Ultraviolet Imaging…”
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Plasma Flows in the Cool Loop Systems
Published in The Astrophysical journal (20-03-2019)“…We study the dynamics of low-lying cool loop systems for three data sets as observed by the Interface Region Imaging Spectrograph. Radiances, Doppler shifts,…”
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Secular perihelion advances of the inner planets and asteroid Icarus
Published in New astronomy (01-08-2014)“…A small effect expected from a recently proposed gravitational impact model (Wilhelm et al., 2013) is used to explain the remaining secular perihelion advance…”
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Anomalous Earth flybys of spacecraft
Published in Astrophysics and space science (01-07-2015)“…A small deviation from the 1 / r potential is expected for the gravitational interaction of extended bodies. It is explained as a consequence of a recently…”
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On the gravitational redshift
Published in New astronomy (01-08-2014)“…•Gravitational redshift is still an important subject in modern physics.•There is no consensus on the physical process(es) causing the shift.•Solution is…”
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Anomalous Sun Flyby of 1I/2017 U1 (`Oumuamua)
Published in Galaxies (01-12-2020)“…The findings of Micheli et al. (Nature2018, 559, 223–226) that 1I/2017 U1 (`Oumuamua) showed anomalous orbital accelerations have motivated us to apply an…”
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An impact model of Newton’s law of gravitation
Published in Astrophysics and space science (01-01-2013)“…The far-reaching gravitational force—in the approximation of Newton’s law of gravitation—is described by a heuristic model with hypothetical massless particles…”
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Confined pseudo-shocks as an energy source for the active solar corona
Published in Nature astronomy (01-12-2018)“…The Sun’s active corona requires an energy flux of ~10 3 W m −2 to compensate for radiative losses and to maintain its high temperature 1 . Plasma moves in…”
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Signatures of red-shifted foot points in the quiescent coronal loop system
Published in Annales geophysicae (1988) (30-08-2019)“…We observed quiescent coronal loops using multi-wavelength observations from the Atmospheric Imaging Assembly (AIA) aboard the Solar Dynamics Observatory (SDO)…”
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Increase of the mean Sun–Earth distance caused by a secular mass accumulation
Published in Astrophysics and space science (01-09-2013)“…Based on many planetary observations between the years 1971 and 2003, Krasinsky and Brumberg (Celest. Mech. Dyn. Astron. 90:267–288, 2004 ) have estimated a…”
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Possible signature of Alfvén wave dissipation in the localized magnetic funnels of the equatorial solar corona
Published in Publications of the Astronomical Society of Japan (01-12-2014)“…We analyse the Hinode/EIS 2″-spectroscopic scan data containing the spectral line formed at typical inner coronal temperature. The strong Fe xii 195.120 Å line…”
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Gravity, massive particles, photons and Shapiro delay
Published in Astrophysics and space science (2013)“…An impact model of gravity designed to emulate Newton’s law of gravitation is applied to particles with relative motions at slow and relativistic speeds. Based…”
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Solar Coronal Plumes and the Fast Solar Wind
Published in Journal of astrophysics and astronomy (01-03-2015)“…The spectral profiles of the coronal Ne viii line at 77 nm have different shapes in quiet-Sun regions and Coronal Holes (CHs). A single Gaussian fit of the…”
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Discovery of the Sun’s million-degree hot corona
Published in Frontiers in astronomy and space sciences (30-07-2014)“…As time goes by, discoveries become common knowledge, and often the person who first changed a paradigm gets forgotten. One such case is the discovery that the…”
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