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Browsing IIAP Publications by Title

Browsing IIAP Publications by Title

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  • How Normal are the Peculiar A-Stars 
    Babu, G. S. D; Shylaja, B. S (Astronomical Society of the Pacific, 1993-02)
  • How well do we know our Sun? 
    Chitre, S. M (Indian Institute of Astrophysics, Bangalore, 1988)
    The role of Our Sun as a valuable astrophysical laboratory for testing theories of stellar physics is highlighted. The state of our knowledge concerning the solar interior and the possible probes for gaining insight into ...
  • Hubble Space Telescope and Optical Observations of Three Pulsating Accreting White Dwarfs in Cataclysmic Variables 
    Szkody, P; Mukadam, A; Gänsicke, B. T; Woudt, P. A; Solheim, Jan - Erik; Nitta, A; Sion, E. M; Warner, B; Sahu, D. K; Prabhu, T. P; Henden, A (University of Chicago Press, 2007-04)
    Ultraviolet observations using the Solar Blind Channel on the Hubble Space Telescope provide light curves and low-resolution spectra of three pulsating white dwarfs in the cataclysmic variables SDSS J013132.39−090122.3, ...
  • Hubble Space Telescope and Optical Observations of Three Pulsating Accreting White Dwarfs in Cataclysmic Variables 
    Szkody, P; Mukadam, A; Gänsicke, B. T; Woudt, P. A; Solheim, Jan-Erik; Nitta, A; Sion, E. M; Warner, B; Sahu, D. K; Prabhu, T. P; Henden, A (American Astronomical Society, 2007-04)
    Ultraviolet observations using the Solar Blind Channel on the Hubble Space Telescope provide light curves and low-resolution spectra of three pulsating white dwarfs in the cataclysmic variables SDSS J013132.39-090122.3, ...
  • Hubble Space Telescope Observations Of Dusty Filaments In Hercules A: Evidence For Entrainment 
    O'Dea, C. P; Baum, S. A; Tremblay, G. R; Kharb, P; Cotton, W; Perley, R (IOP Publishing, 2013-07-01)
    We present U-, V-, and I-band images of the host galaxy of Hercules A (3C 348) obtained with HST/WFC3/UVIS. We find a network of dusty filaments which are more complex and extended than seen in earlier Hubble Space Telescope ...
  • The Hubble tension: change in dark energy or a case for modified gravity? 
    Sivaram, C; Arun, K; Rebecca, Louise (Springer, 2022-03)
    Recently, much controversy has been raised about the cosmological conundrum involving the discrepancy in the value of the Hubble constant as implied by Planck satellite observations of the CMBR in the early Universe and ...
  • Hundred Years of Einstein's Cosmological Constant 
    Sivaram, C; Arun, K; Kiren, O. V; Sivaram, C (Isaac Scientific Publishing, 2018-06)
    It was little over a hundred years ago that Einstein introduced the ‘cosmological constant’ in his General Theory of Relativity in order to obtain a static universe, to conform to the philosophical view of the universe ...
  • Hybrid approach to relativistic Gaussian basis functions: Theory and applications 
    Chaudhuri, R. K; Panda, P. K; Das, B. P (The American Physical Society, 1999-02)
    We present a hybrid method to solve the relativistic Hartree-Fock-Roothan equations where the one- and two-electron radial integrals are evaluated numerically by defining the basis functions on a grid. This procedure reduces ...
  • Hybrid viscosity and magnetoviscous instability in hot, collisionless accretion disks 
    Subramanian, P; Becker, P. A; Kafatos, M. (Springer Netherlands, 2008)
    We aim to illustrate the role of hot protons in enhancing the magnetorotational instability (MRI) via the “hybrid” viscosity, which is due to the redirection of protons interacting with static magnetic field perturbations, ...
  • The hydrogen content of prominences 
    Menon, C. P. S (Government Observatory, Madras, 1933-06-14)
  • The hydrogen-deficient irregular variable star V348 SGR 
    Kameswara Rao, N; Nandy, K (1984-07)
    The distribution of the reddening material around V 348 Sgr was studied using the IUE low resolution spectra. The nebula surrounding the star has a reddening of E(B-V) = 0.3 caused mainly by the foreground interstellar ...
  • Hydrogen-deficient nature of Z UMi 
    Goswami, A; Kameswara Rao, N; Gonzalez, G; Lambert, D. L (Astronomical Society of the Pacific, 1996)
  • Hydromagnetic surface waves in compressible moving cylindrical flux tubes 
    Satya Narayanan, A (IOP Publishing, 1991-04)
    The dispersive characteristics of hydromagnetic surface waves along the boundary of a moving compressible cylindrical plasma column of radius 'a' surrounded by a compressible stationary column are studied
  • Hypertelescope Approach: A Novel Method for Imaging of Stellar Objects 
    Saha, S. K (Optical Society of India, 2011)
    The diffraction limited phase retrieval of a degraded image is an important subject that is being implemented in other branches of physics too, for example, electron microscopy, wavefront sensing, and crystallography. A ...
  • Hypertelescope imaging 
    Saha, S. K (Anita Publications, 2011-03)
    Single aperture interferometry by means of speckle imaging has made inroads in several important fields in astrophysics. In recent years, the adaptive optics system at the telescope has produced spectacular results. ...
  • Hα full line spectropolarimetry as diagnostics of chromospheric magnetic field 
    Nagaraju, K; Sankarasubramanian, K; Rangarajan, K. E (Indian Academy of Sciences, 2020-12)
    Analysis of spectropolarimetric observations of two circular sunspots located close to disk centre in Hα (6562.8 Å) and Fe i (6569.22 Å) is presented in this paper. The corresponding active region numbers areNOAA 10940 and ...
  • H I kinematics of the Large Magellanic Cloud revisited: Evidence of possible infall and outflow 
    Indu, G; Subramaniam, A (EDP Sciences, 2015-01)
    Aims. The neutral atomic Hydrogen (H I) kinematics of the Large Magellanic Cloud (LMC) is revisited in light of two new proper motion estimates. Methods. We analysed the intensity weighted H I velocity maps of the Australia ...
  • i-Process nucleosynthesis: Observational evidences from CEMP stars 
    Goswami, P. P; Goswami, A (Indian Academy of Sciences, 2020-12)
    The surface chemical compositions of a large fraction of carbon-enhanced metal-poor (CEMP) stars, the so-called CEMP-r/s stars, are known to exhibit enhancement of both s-process and r-process elements. For these stars, ...
  • Identification of AlF Molecular Lines in Sunspot Umbral Spectra 
    Bagare, S. P; Balachandra Kumar, K; Rajamanickam, N (Springer, 2006-03)
    High resolution FTS sunspot umbral spectra from NSO/Kitt Peak were used to detect rotational lines due to 11 electronic transitions of the molecule AlF, in the wavelength region 4400 9000 Å. The presence of lines due to ...
  • Identification of beryllium hydride isotopomer lines in sunspot umbral spectra 
    Shanmugavel, R; Bagare, S. P; Rajamanickam, N; Balachandra Kumar, K (Astronomical Observatory, Serbia, 2008-06)
    A high resolution spectrum of FTS sunspot umbra of NSO/Kitt Peak was used to conduct a search for the molecular absorption lines due to BeH, BeD and BeT isotopomers. Analysis led to estimates of identification of the ...

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