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Browsing IIAP Publications by Title

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  • Effects of rotation on the colours and line indices of stars. V - The ZRMS and the ZRZAMS 
    Mathew, Annamma; Rajamohan, R (Indian Academy of Sciences, 1992-03)
    The observed uvby and H-beta indices of member stars of the Hyades and Praesepe clusters are analyzed in detail for rotation. The slopes of the rotation effects observed are utilized to determine the zero rotation main ...
  • Effects of rotation on the colours and line indices of stars. VI - The reality of the blue straggler phenomenon 
    D'Souza, J; Mathew, Annamma; Rajamohan, R (Indian Academy of Sciences, 1992-03)
    The effect of rotation on the observed colors of stars has been considered as a possible cause for the blue straggler phenomenon in clusters listed by Mermilliod (1982). It appears that this phenomenon is definitely not ...
  • Effects of Solar Eclipse on Zooplanktomic Diel Periodicity and Primary Productivity in fresh water ponds 
    Mukhopadhyay, S. K; Biswas, S; Chatterjee, A (Indian Institute of Astrophysics, Bangalore, 1997)
    Solar eclipse was observed to initiate changes in primary productivity and diel periodicity in zooplanktonic surface crowding. Eclipse effect was more pronounced on loricate, illoricate rotifers and a copepoda Mesocyclops ...
  • Effects of spacetime curvature and rotation on arrival times of pulses from fast pulsars 
    Kapoor, R. C; Datta, B (American Astronomical Society, 1986-12)
    General relativistic effects due to spacetime curvature and rotation on the arrival times of pulsar signals are investigated using a rotationally perturbed spherical metric. It is found that for the millisecond pulsar PSR ...
  • Effects of stimulated emission on radiative transfer with partial redistribution 
    Rangarajan, K. E; Mohan Rao, D; Peraiah, A (The European Southern Observatory, 1990-08)
    The non-LTE line transfer with stimulated emission is studied. Stimulated emission is important for red transitions in hot stars and infrared transitions in cool stars. The deviation of the absorption and emission profiles ...
  • Effects of temperature and velocity gradients on Doppler widths 
    Peraiah, A; Varghese, B. A (D. Reidel Publishing Co., 1986-10)
    The effects of gradients of temperature and expansion velocities on Doppler widths is investigated, and the emergent profiles of lines in different spherically symmetric media are calculated. The variations of the source ...
  • The effects of the small-scale behaviour of dark matter power spectrum on CMB spectral distortion 
    Sarkar, A; Sethi, S. K; Das, Subinoy (IOP Publishing, 2017-07)
    After numerous astronomical and experimental searches, the precise particle nature of dark matter is still unknown. The standard Weakly Interacting Massive Particle(WIMP) dark matter, despite successfully explaining the ...
  • The effects of the small-scale DM power on the cosmological neutral hydrogen (HI) distribution at high redshifts 
    Sarkar, A; Mondal, Rajesh; Das, Subinoy; Sethi, S. K; Bharadwaj, Somnath; Marsh, D.â (IOP Publishing, 2016-04)
    JCAP04(2016)012 ou rnal of C osmology and A strop article P hysics An IOP and SISSA journal J The effects of the small-scale DM power on the cosmological neutral hydrogen (H i ) distribution at ...
  • Effects of thermal emission on Chandrasekhar's semi-infinite diffuse reflection problem 
    Sengupta, Soumya (IOP Publishing, 2021-04-20)
    The analytical results of Chandrasekhar's semi-infinite diffuse reflection problem is crucial in the context of the stellar or planetary atmosphere. However, the atmospheric emission effect was not taken into account in ...
  • Effects of thermal emission on the transmission spectra of hot Jupiters 
    Chakrabarty, Aritra; Sengupta, S (IOP Publishing, 2020-07-20)
    The atmosphere on the dayside of a highly irradiated close-in gas giant (also known as a hot Jupiter) absorbs a significant part of the incident stellar radiation, which again gets re-emitted in the infrared wavelengths ...
  • The Effects of Transients on Photospheric and Chromospheric Power Distributions 
    Mandal, Sudip; Yuan, D; Fang, Xia; Banerjee, D; Pant, V; Van Doorsselaere, T (IOP Publishing, 2016-09-10)
    Slow MHD waves are important tools for understanding coronal structures and dynamics. In this paper, we report a number of observations from the X-Ray Telescope (XRT) on board HINODE and Solar Dynamic Observatory/Atmospheric ...
  • The effects of transients on photospheric and chromospheric power distributions 
    Samanta, T; Henriques, V. M. J; Banerjee, D; Krishna Prasad, S; Mathioudakis, M; Jess, D; Pant, V (IOP Publishing, 2016-09-01)
    We have observed a quiet-Sun region with the Swedish 1 m Solar Telescope equipped with the CRISP Imaging SpectroPolarimeter. High-resolution, high-cadence, Hα line scanning images were taken to observe different layers of ...
  • Effects of Velocities on Ca II H and K Lines 
    Rangarajan, K. E; Mohan Rao, D; Peraiah, A (Indian Institute of Astrophysics, Bangalore, 1981)
    Ca II H and K (3968, 3933) and infrared triplet lines lamda lamda lamda 8498, 8662, 8542 were calculated in a very slowly expanding medium. Five level atom with continuum was considered. Radiative transfer equation and ...
  • Effects on partial frequency redistribution R(II) on the level population ratios in a resonance line 
    Peraiah, A; Nagendra, K. N (Kluwer Academic Publishers, 1983-02)
    Simultaneous solutions of the radiative transfer equation in the comoving frame and the statistical equilibrium equation, for a non-LTE two-level atom, have been obtained by means of angle-averaged partial frequency ...
  • An efficient decomposition technique to solve angle-dependent Hanle scattering problems 
    Supriya, H. D; Sampoorna, M; Nagendra, K. N; Ravindra, B; Anusha, L. S (Elsevier, 2013-04)
    Hanle scattering is an important diagnostic tool to study weak solar magnetic fields. Partial frequency redistribution (PRD) is necessary to interpret the linear polarization observed in strong resonance lines. Usually ...
  • Efficient minimization of servo lag error in adaptive optics using data stream mining 
    Vyas, A; Roopashree, M. B; Prasad, B. R (Springer, 2011)
    Prediction of the wavefronts helps in reducing the servo lag error in adaptive optics caused by finite time delays (~ 1-5 ms) before wavefront correction. Piecewise linear segmentation based prediction is not suitable in ...
  • An efficient modulation scheme for dual beam polarimetry 
    Nagaraju, K; Ramesh, K. B; Sankarasubramanian, K; Rangarajan, K. E (Astronomical Society of India, 2007-09)
    An eight stage balanced modulation scheme for dual beam polarimetry is presented in this paper. The four Stokes parameters are weighted equally in all the eight stages of modulation resulting in total polarimetric efficiency ...
  • Eigenfrequencies of radial pulsations of strange quark stars 
    Datta, B; Sahu, P. K; Anand, J. D; Goyal, A (World Scientific, 1994)
    We calculate the range of Eigenfrequencies of radial pulsations of stable strange quark stars, using the general relativity pulsation equation and adopting realistic equation of state for degenerate (u,d,s) quark matter.
  • Eigenfrequencies of radial pulsations of strange quark starsEigenfrequencies of radial pulsations of strange quark stars 
    Datta, B; Sahu, P. K; Anand, J. D; Goyal, A (Elsevier, 1992-06)
    We calculate the range of eigenfrequencies of radial pulsations of stable strange quark stars, using the general relativistic pulsation equation and adopting realistic equation of state for degenerate strange quark matter.
  • The Eighth Data Release of the Sloan Digital Sky Survey: First Data from SDSS-III 
    Aihara, H; Allende Prieto, C; An, D; Anderson, S. F; Aubourg, E; Balbinot, E; Beers, T. C; Berlind, A. A; Bickerton, S. J; Bizyaev, D; Blanton, M. R; Gillespie, B. A; Pan, K; Gilmore, G; González Hernández, J. I; Bochanski, J. J; Gott, J. R; Gould, A; Grebel, E. K; Mullally, F; Gunn, J. E; Phleps, S; Hamilton, J; Harding, P; Carr, M. A; Harris, D. W; Hawley, S. L; Hearty, F. R; Nichol, R. C; Ho, S; Hogg, D. W; Holtzman, J. A; Davenport, J. R. A; Honscheid, K; Muna, D; Inada, N; Pandey, P; Ivans, I. I; Jiang, L; Johnson, J. A; Jordan, C; O'Connell, R. W; Jordan, W. P; Pichon, C; Kazin, E. A; Kirkby, D; Klaene, M. A; Knapp, G. R; Paris, I; Munn, J. A; Kneib, J; Kochanek, C. S; Koesterke, L; Kollmeier, J. A; Pieri, M. M; Ogando, R. L. C; Kron, R. G; Lampeitl, H; Lang, D; Le Goff, J; Bolton, A. S; Lee, Y. S; Lin, Y; Murayama, H; Long, D. C; Chen, Y; Loomis, C. P; Lucatello, S; Olmstead, M. D; Lundgren, B; Lupton, R. H; Ma, Z; Percival, W. J; MacDonald, N; Mahadevan, S; Maia, M. A. G; Prada, F; Makler, M; Myers, A. D; Malanushenko, E; Malanushenko, V; Oravetz, D. J; Mandelbaum, R; Maraston, C; Petitjean, P; Margala, D; Masters, K. L; Price-Whelan, A. M; McBride, C. K; McGehee, P. M; McGreer, I. D; Ménard; Naugle, T; Fausti Neto, A; Padmanabhan, N; Palanque-Delabrouille, N; Pfaffenberger, R; Pforr, J; Raddick, M. J; Bovy, J; Ramos, B. H. F; Esposito, M; Reyle, C; Rich, J; Miralda-Escudé, J; Richards, G. T; Rix, H; Robin, A. C; Chiappini, C; Rocha-Pinto, H. J; Rockosi, C. M; Roe, N. A; Cuong Nguyen, D; Rollinde, E; Brandt, W. N; Ross, A. J; Dawson, K; Ross, N. P; Rossetto, B. M; Sánchez, A. G; Sayres, C; Comparat, J; Schlegel, D. J; Evans, M. L; Schlesinger, K. J; Schmidt, S. J; Schneider, D. P; Sheldon, E; Dhital, S; Brinkmann, J; Shu, Y; Simmerer, J; Simmons, A. E; Sivarani, T; Fan, X; Connolly, N; Snedden, S. A; Sobeck, J. S; Steinmetz, M; Strauss, M. A; Ealet, A; Szalay, A. S; Tanaka, M; Brown, P. J; Thakar, A. R; Morrison, H. L; Thomas, D; Tinker, J. L; Cortes, M; Tofflemire, B. M; Tojeiro, R; Tremonti, C. A; Ebelke, G. L; Vandenberg, J; Vargas Magaña, M; Verde, L; Femenía Castellá, B; Vogt, N. P; Brownstein, J. R; Wake, D. A; Wang, J; Croft, R. A. C; Weaver, B. A; Weinberg, D. H; Edmondson, E. M; White, M; White, S. D. M; Font-Ribera, A; Yanny, B; Yasuda, N; Yeche, C; Zehavi, I; Busca, N. G; Campbell, H; Cuesta, A. J; da Costa, L. N; Eisenstein, D. J; Escoffier, S; Frinchaboy, P. M; Ge, J (IOP Publishing, 2011-04)
    The Sloan Digital Sky Survey (SDSS) started a new phase in 2008 August, with new instrumentation and new surveys focused on Galactic structure and chemical evolution, measurements of the baryon oscillation feature in the ...

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