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Browsing IIAP Publications by Title

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  • Creating a large aspheric primary mirror using spherical segments 
    Jacob, A; Parihar, P; James, Melvin.K (Springer, 2020-08)
    The use of aspheric mirrors is a common practice to design astronomical telescopes with a few optical elements. In the most preferred optical design Ritchey Chretien (RC), both primary and secondary mirrors are hyperboloid. ...
  • Creating the Measure of Chandrasekhar's Life 
    Miller, A. I; Mallik, D. C. V; Wali, K (American Institute of Physics, 2006-09)
  • Critical Analysis of Tess Transit Photometric Data: Improved Physical Properties for Five Exoplanets 
    Saha, Suman; Sengupta, S (2021-11-01)
    We present improved physical parameters for four hot Jupiters: KELT-7 b, HAT-P-14 b, WASP-29 b, WASP-95 b, and a hot Neptune: WASP-156 b, by performing critical and rigorous analysis of the time-series observations from the ...
  • A critical analysis of the ground and excited electronic states of transition metal nitrides using the relativistic effective Hamiltonian method 
    Chaudhuri, R. K; Freed, K. F (American Institute of Physics, 2003-09-22)
    Multireference many-body perturbative schemes (IVO-CASCI and Hv3rd), which are applicable to the direct calculation of excitation energies, ionization potentials, and spectroscopic properties, are presented and applied to ...
  • A critical compilation of oscillator strengths for Fe II lines. 
    Giridhar, S; Arellano Ferro, A (Mexicana de Astronomia y Astrofisica, 1995-04)
    We have compiled oscillator strengths for 848 Fe II lines of astrophysical interest. The Oscillator strengths from various sources like laboratory measurements, semi-empirical estimates and those derived using solar Fe II ...
  • A critique on Drexler dark matter 
    Sivaram, C; Arun, K; Nagaraja, R (Springer, 2011-05)
    Drexler dark matter is an alternate approach to dark matter that assumes that highly relativistic protons trapped in the halo of the galaxies could account for the missing mass. We look at various energetics involved in ...
  • Crustal shear velocity structure of the south Indian shield 
    Rai, S. S; Priestley, K; Suryaprakasam, K; Srinagesh, D; Gaur, V. K; Du, Z (American Geophysical Union, 2003-02-11)
    The south Indian shield is a collage of Precambrian terrains gathered around and in part derived from the Archean-age Dharwar craton. We operated seven broadband seismographs on the shield along a N-S corridor from Nanded ...
  • Crustal stress patterns: Analysis of Ps splitting for seismic anisotropy 
    Rai, Abhishek; Rai, S. S; Gaur, V. K (Indian Academy of Sciences, 2008-04)
  • Crustal structure and earthquake focal depths beneath northeastern India and southern Tibet 
    Mitra, S; Priestley, K; Bhattacharyya, A. K; Gaur, V. K (Royal Astronomical Society, 2005-01)
    We use broad-band teleseismic data recorded at eight sites along a north-south profile from Karimganj (24.84°N, 92.34°E), south of the eastern Shillong Plateau, to Bomdilla (27.27°N, 92.41°E) in the eastern Lesser Himalaya, ...
  • Crustal structure of the Darjeeling-Sikkim Himalaya and southern Tibet 
    Acton, C. E; Priestley, K; Mitra, S; Gaur, V. K (Wiley Blackwell, 2011-02)
    Analysis of data from nine, temporary broadband seismic stations operated across West Bengal and Sikkim, along with publicly available data from seismographs in the surrounding region, provides the first image of the ...
  • CS Depletion in Prestellar Cores 
    Kim, Shinyoung; Lee, Chang Won; Maheswar, G; Tafalla, Mario; Sohn, Jungjoo; Kim, Gwanjeong; Kim, Mi-Ryang; Archana Soam; Myers, P. C (IOP Publishing, 2020-03-10)
    The CS molecule is known to be adsorbed onto dust in cold and dense conditions, causing it to be significantly depleted in the central region of cores. This study is aimed to investigate the depletion of the CS molecule ...
  • Curiosity, ambition and foolhardiness 
    Krishan, V (Indian Academy of Sciences, 2008)
  • The Curious Case of PDS 11: A Nearby, >10 Myr Old, Classical T Tauri Binary System 
    Mathew, B; Manoj, P; Bhatt, B. C; Sahu, D. K; Maheswar, G; Muneer, S (IOP Publishing, 2017-05)
    We present results of our study of the PDS 11 binary system, which belongs to a rare class of isolated, high Galactic latitude T Tauri stars. Our spectroscopic analysis reveals that PDS 11 is an M2–M2 binary system with ...
  • Current rate of nucleosynthesis and its implications 
    Mallik, D. C. V (Indian Academy of Sciences, 1981-06)
    The current rate of nucleosynthesis in the solar neighbourhood is re-evaluated on the basis of Arnett’s (1978) stellar yields, the mass loss models of Chiosi, Nasi and Sreenivasan (1978) and the initial mass function ...
  • Curvature from spin 
    de Sabbata, V; Sivaram, C (Springer, 1992-12)
    We show that, considering the dislocation defect induced by torsion in spacetime, which behaves like a string with tension, we are lead also to defect angle and then to curvature of spacetime. The space with torsion and ...
  • Curvature, phase space, holography and black hole entropy 
    Sivaram, C; Arun, K (World Scientific Publishing, 2009-12)
    This paper discusses the thermodynamics of a black hole with respect to Hawking radiation and the entropy. We look at a unified picture of black hole entropy and curvature and how this can lead to the usual black hole ...
  • A curved 150 pc long jet in the double-peaked emission-line AGN KISSR 434 
    Kharb, P; Vaddi, Sravani; Sebastian, B; Subramanian, S; Mousumi Das; Paragi, Z (IOP Publishing, 2019-02-01)
    Double-peaked emission lines in the narrow- and/or broad-line spectra of active galactic nuclei (AGNs) have been suggested to arise as a result of disky broad/narrow-line regions, jet–medium interaction, or the presence ...
  • Curvit: An open-source Python package to generate light curves from UVIT data 
    Joseph, P; Stalin, C. S; Tandon, S. N; Ghosh, S. K (Indian Academy of Sciences, 2021-10)
    Curvit is an open-source Python package that facilitates the creation of light curves from the data collected by the Ultra-Violet Imaging Telescope (UVIT) onboard AstroSat, India’s first multi-wavelength astronomical ...
  • Cusps and Distortions in Ionospheric Fl-layer observed over Kodaikanal 
    Sankaran, K. S (Indian Meteorological Department, 1964)
    A special study of cusps and distortions in Fl-layers traces has been made from ionograms obtained at Kodaikanal during a period of about half a solar cycle. Two differnet types of disturbance have been noticed. The first ...
  • Cylindrical Hall – MHD Waves: A Nonlinear Solution 
    Krishan, V; Varghese, B. A (Springer Netherlands, 2008-01)
    The exact nonlinear cylindrical solution for incompressible Hall – magnetohydrodynamic (HMHD) waves, including dissipation, essentially from electron – neutral collisions, is obtained in a uniformly rotating, weakly ionized ...

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