IIAP Publications: Recent submissions

  • Spectroscopy of post-AGB a-supergiant HD 101584 (IRAS 11385-5517) 
    Sivarani, T; Parthasarathy, M; García, L. P; Manchado, A; Pottasch, S. R (Kluwer Academic Publishers, 2001-08)
    In the high resolution optical spectra we identified forbidden lines of [OI] and [CI], which indicate the presence of low excitation nebula. There are many emission lines due forbidden and permitted lines of neutral and ...
  • Light variability of color selected IRAS sources: variables in late AGB and early post-AGB phase 
    Fujii, T; Nakad, Y; Parthasarathy, M (Kluwer Academic Publishers, 2001-08)
    The transition from AGB to post-AGB stars was investigated using the H-band monitoring of these objects for four years. The Mira-type pulsations were found only in the restricted area in the IRAS two color diagram. The ...
  • Multislit spectrophotometry of the corona 
    Saxena, A. K; Singh, J; Gabriel, F (Indian National Science Academy, 1981)
  • Ionospheric electron content and equivalent slab thickness in the equatorial region 
    Das Gupta, A; Basu, S; Bhar, J. N; Bhattacharyya, J. C (American Geophysical Union, 1975-02)
    The ionospheric total electron content and equivalent slab thickness in the equatorial region around 75° E have been studied. It is found that the slab thickness exhibits a strong latitudinal dependence with a maximum at ...
  • Coronal photography at H alpha 
    Rangarajan, K. E; Giridhar, S (Indian National Science Academy, 1981)
  • Spectrophotometry of the inner corona 
    Rajamohan, R; Raheem, K. C. A; Jayarajan, A. P (Indian National Science Academy, 1981)
  • HiRES: high resolution extreme ultraviolet spectroheliometer 
    Berger, T; Bergamini, P; Kirby, H; Timothy, J. G; Walker, A. B. C; Bhattacharyya, J. C; Jain, S. K; Saxena, A. K; Huber, M. C. E; Naletto, G; Tondello, G (Cambridge University Press, 1993)
    The HiRES sounding rocket payload is designed to obtain very high spatial, spectral, and temporal resolution images of the solar chromospheric and coronal plasmas in the extreme ultraviolet (EUV) wavelength range from 500 ...
  • Determination of the limb darkening of the solar disc in the visible and near ultraviolet 
    Bhattacharyya, J. C; Chandramohan, R; Sundareswaran, A; Charles, A (Indian National Science Academy, 1981)
  • Polarization of the corona 
    Babu, G. S. D; Jayachandran, M; Jayarajan, A. P; Peter, L (Indian National Science Academy, 1981)
  • Further photometric observations of the cataclysmic variable PG 1012-029 
    Ashoka, B. N; Marar, T. M. K; Seetha, S; Kasturirangan, K; Rao, U. R; Bhattacharyya, J. C (Kluwer Academic Publishers, 1993)
    We report time series photometric observations of PG 1012-029, conducted during 1990 and 1991. Light curves of three consecutive eclipses recorded in a single night are presented. The enhanced pre-eclipse hump in our data ...
  • How black is a black hole? 
    Kapoor, R. C (Bennett. Coleman & Co., Ltd., 1977-05)
  • The colors of Am Stars 
    Shylaja, B. S; Babu, G. S. D (Astronomical Society of the Pacific, 1993-01)
    The energy distribution of the Am stars are affected by the line blanketing, which appears as a deviation in the behaviour of color indices with reference to the normal stars. In this paper we study the various color indices ...
  • Triggered star formation and evolution of T-Tauri stars in and around bright-rimmed clouds 
    Chauhan, N; Pandey, A. K; Ogura, K; Ojha, D. K; Bhatt, B. C; Ghosh, S. K; Rawat, P. S (Blackwell Publishing, 2009-06)
    The aim of this paper is to quantitatively testify the `small-scale sequential star formation' hypothesis in and around bright-rimmed clouds (BRCs). As a continuation of the recent attempt by Ogura et al., we have carried ...
  • Comparison among Ca II K spectroheliogram time series with an application to solar activity studies 
    Ermolli, I; Solanki, S. K; Tlatov, A. G; Krivova, N. A; Ulrich, R. K; Singh, J (Institute of Physics, 2009-06)
    Various observatories around the globe started regular full-disk imaging of the solar atmosphere in the Ca II K line in the early decades of the 20th century. The archives made by these observations have the potential of ...
  • Propagating waves in polar coronal holes as seen by SUMER & EIS 
    Banerjee, D; Teriaca, L; Gupta, G. R; Imada, S; Stenborg, G; Solanki, S. K (EDP Sciences, 2009-06)
    Context: To study the dynamics of coronal holes and the role of waves in the acceleration of the solar wind, spectral observations were performed over polar coronal hole regions with the SUMER spectrometer on SoHO and the ...
  • X-Ray variability of active galactic nuclei in the soft and hard X-Ray bands 
    Chitnis, V. R; Pendharkar, J. K; Bose, D; Agrawal, V. K; Rao, A. R; Misra, R (Institute of Physics, 2009-06)
    We investigate the X-ray variability characteristics of hard X-ray-selected active galactic nuclei (AGNs)—based on Swift/Burst Alert Telescope—in the soft X-ray band using the Rossi X-ray Timing Explorer/All-Sky Monitor ...
  • Relativistic coupled-cluster studies of ionization potentials, lifetimes, and polarizabilities in singly ionized calcium 
    Sahoo, B. K; Das, B. P; Mukherjee, D (The American Physical Society, 2009-05)
    Using the relativistic coupled-cluster method, we have calculated ionization potentials, electric dipole transition amplitudes, and dipole polarizabilities of many low-lying states of Ca/sub+. Contributions from the Breit ...
  • Identification of CrH and CrD molecular lines in the sunspot umbral spectrum 
    Viswanathan, B; Shanmugavel, R; Bagare, S. P; Rajamanickam, N; Sriramachandran, P (Springer, 2009-07)
    High-resolution Fourier transform spectrometer sunspot umbral spectra obtained at the National Solar Observatory/Kitt Peak were used to identify molecular rotational lines arising from the infrared band systems of CrH and ...
  • Planetary dynamos 
    Gaur, V. K (Springer Netherlands, 2008)
    The article begins with a reference to the first rational approaches to explaining the earth’s magnetic field notably Elsasser’s application of magneto-hydrodynamics, followed by brief outlines of the characteristics of ...
  • Pulsar radio emission geometry 
    Gangadhara, R. T (Springer Netherlands, 2008)
    Pulsar radio emission is belived to come from relativistic plasma accelerated along the dipolar magnetic field lines in pulsar magnetosphere. The beamed emission by relativistic sources occur in the direction of tangents ...

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