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Browsing IIAP Publications by Title

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  • Robust inversion of carbon dioxide fluxes over temperate Eurasia in 2006–2008 (201) 
    Swathi, P. S; Indira, N. K; Rayner, P. J; Ramonet, M; Jagadheesha, D; Bhatt, B. C; Gaur, V. K (Indian Academy of Sciences, 2013-07-25)
    Carbon dioxide (CO2) fluxes over the temperate Eura-sian region have been estimated robustly for the period 2006–2008 using the time-dependent inversion com-ponent of the TRANSCOM protocol. Data from six CO2 measuring ...
  • Roche instability in binary stellar systems 
    Namboodiri, P. M. S; Kochhar, R. K (Nova Science Publishers Inc, 1993)
  • The role of Compton and Raman scattering in the quasar continuum 
    Gangadhara, R. T; Krishan, V (Blackwell Publishing, 1992-05)
    There are three ways in which an electromagnetic wave can undergo scattering in a plasma: (1) when the scattering of radiation occurs by a single electron, it is called Compton Scattering; (2) if it occurs by a longitudinal ...
  • Role of equatorial ionization anomaly in the initiation of equatorial spread F 
    Raghavarao, R; Nageswararao, M; Sastri, J. H; Vyas, G. D; Sriramarao, M (American Geophysical Union., 1988-06)
    A comparative study is made of the changes in the latitudinal structure of the F region electron density at fixed altitudes in the Indian equatorial region on days with and without postsunset onset of equatorial spread F, ...
  • Role of f-Gravity in Cosmological Models 
    Sivaram, C; Sinha, K. P; Lord, E. A (Indian Academy of Sciences, 1975)
  • The Role of Filamentary Structures in the Formation of Two Dense Cores, L1544 and L694-2 
    Kim, Shinyoung; Lee, Chang Won; Tafalla, Mario; Maheswar, G; Caselli, Paola; Myers, Philip C; Chung, Eun Jung; Li, Shanghuo (American Astronomical Society, 2022-12-01)
    We present mapping results of two prestellar cores, L1544 and L694-2, embedded in filamentary clouds in C18O (3–2), 13CO (3–2), 12CO (3–2), HCO+ (4–3), and H13CO+ (4–3) lines with the James Clerk Maxwell Telescope to examine ...
  • The role of Lorentz force in the evolution of the circum-solar dust band 
    Satheesh Kumar, A; Isobe, S (Indian Institute of Astrophysics, 1997)
    The charging processes of the dust particles in the near- solar regions, and the effects of the Lorentz force acting on such particles have been analyzed. It is found that the Lorentz force is capable of either forcing the ...
  • The role of magnetic fields in the stability and fragmentation of filamentary molecular clouds: two case studies at OMC-3 and OMC-4 
    Li, Pak Shing; Lopez-Rodriguez, Enrique; Archana Soam; Klein, Richard I (Oxford University Press on behalf of Royal Astronomical Society, 2022-08)
    We present the stability analysis of two regions, OMC-3 and OMC-4, in the massive and long molecular cloud complex of Orion A. We obtained 214 μm HAWC + /SOFIA polarization data, and we make use of archival data for the ...
  • Role of magnetic pressure forces in fluctuation dynamo saturation 
    Sur, Sharanya; Subramanian, Kandaswamy (Oxford University Press on behalf of Royal Astronomical Society, 2024-01)
    Using magnetohydrodynamic simulations of fluctuation dynamos in turbulent flows with rms Mach numbers Mrms = 0.2, 1.1, and 3, we show that magnetic pressure forces play a crucial role in dynamo saturation in supersonic ...
  • Role of nonthermal velocity fields in determining the H-alpha widths in supergiant chromospheres 
    Mallik, S. G. V (The Astronomical Society of the Pacific., 1990-10)
    Radiative transfer calculations of the H-alpha line in spherically symmetric, expanding chromospheres explain the large widths of the line observed in late G and K supergiants. The role of various dynamical processes as ...
  • Role of plasma processes in astrophysics 
    Krishan, V (The Royal Swedish Academy of Sciences, 1994)
    The universe is made up of plasmas and fluids. The plasma phenomena exhibits itself through electromagnetic processes and the fluid through configurational processes. I shall try to illustrate both these aspects by taking ...
  • Role of primordial black holes in the direct collapse scenario of supermassive black hole formation at high redshifts 
    Pandey, Kanhaiya L; Mangalam, A (Indian Academy of Sciences, 2018-02)
    In this paper, we explore the possibility of accreting primordial black holes as the source of heating for the collapsing gas in the context of the direct collapse black hole scenario for the formation of super-massive black ...
  • The Role of Quantum Interference and Partial Redistribution in the Solar Ba II D2 4554 Ã… Line 
    Smitha, H. N; Nagendra, K. N; Stenflo, J. O; Sampoorna, M (Astronomical Society of the Pacific, 2014-10)
    The Ba ii D2 line at 4554 Å is a good example, where the F-state interference effects due to the odd isotopes produce polarization profiles, which are very different from those of the even isotopes that do not exhibit ...
  • The role of radiation pressure in the narrow line regions of Seyfert host galaxies 
    Davies, R. L; Dopita, M. A; Kewley, L; Groves, B; Sutherland, R; Hampton, E. J; Shastri, P; Kharb, P; Bhatt, H. C; Scharwachter, J; Jin, C; Banfield, J; Zaw, I; James, B; Juneau, S; Srivastava, S (IOP Publishing, 2016-06-10)
    We investigate the relative significance of radiation pressure and gas pressure in the extended narrow line regions (ENLRs) of four Seyfert galaxies from the integral field Siding Spring Southern Seyfert Spectroscopic ...
  • The Role of Rotation and Polar-Cap currents on Pulsar Radio Emission and Polarization 
    Dinesh Kumar; Gangadhara, R. T (IOP Publishing, 2013-06-01)
    Perturbations such as rotation and polar-cap current (PC-current) have been believed to greatly affect the pulsar radio emission and polarization. The two effects have not been considered simultaneously in the literature; ...
  • Role of time resolution on polarization of pulsar radiation 
    Gangadhara, R. T; Xilouris, K. M; von Hoensbroech, A; Kramer, M; Jessner, A; Wielebinski, R (The European Southern Observatory, 1999-02)
    The role of orthogonal polarization modes in pulsar emission is re-examined in view of polarization data of high time resolution. Individual pulse data of PSR B1133+16 at 1.41 GHz, obtained with time resolutions of 1160, ...
  • Rotating compact star with superconducting quark matter 
    Panda, P. K; Nataraj, H. S (The American Physical Society, 2006-02)
    A compact star with superconducting quark core, the hadron crust and the mixed phase between the two is considered. The quark meson coupling model for hadron matter and the color flavor locked quark model for quark matter ...
  • The rotating envelope of the hot star gamma Cassiopeiae resolved by optical interferometry 
    Mourard, D; Bosc, I; Labeyrie, A; Saha, S. K (Nature Publishing Group, 1989-11)
    CERTAIN hot stars, belonging to the Be class, may have an envelope of hydrogen gas, possibly in the form of a rotating disk or spheroidal shell. Other models involve elliptical rings or close binary systems where the Roche ...
  • Rotating light house effect 
    Rajamohan, R; Satya Narayanan, A (Global Journals Inc., 2013-07)
    We clarify as to how a precession period appears in the analysis of periodic phenomenon in Astrophysics. The observed redshift that is related to this phenomenon is shown to be 2a/V = 2 / T, where ‘a’ is the relative ...
  • Rotating neutron star structure - Implications of the millisecond pulsar PSR 1937 + 214 
    Ray, A; Datta, B (The American Astronomical Society, 1984-07)
    Rapidly rotating fluid objects of a given mass can remain stable only up to a critical angular speed, beyond which they may undergo instabilities leading to disruption. A semi-Newtonian condition of rotational stability ...

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