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Browsing IIAP Publications by Title

Browsing IIAP Publications by Title

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  • Subramaniam, A (The European Southern Observatory, 2003-11)
    The geometry of the LMC bar is studied using the dereddened mean magnitudes of the red clump stars (I0) from the Optical Gravitational Lensing Experiment II catalog. The value of I0 is found to vary in the east-west direction ...
  • Morgan, D. H; Nandy, K; Kameswara Rao, N (D. Reidel Publishing Co, 1986)
    This paper describes the behaviour of HV 12842 during the period 1976 - 1985 as it appears on the 38 I plates of LMC(N) taken with the UK 1.2 m Schmidt Telescope.
  • Sivaram, C (World Scientific, 1984)
    The Ubiquitous occurrence of the Dirac-Eddington large dimensionless numbers when relating the physical parameters such as mass, radius, angular momentum etc. of typical astrophys1cal objects like stars and galax1es to ...
  • Saxena, A. K (SPIE-The International Society for Optical Engineering, 1990)
    Indian Institute of Astrophysics (IIA) has recently completed building of 2.34 MTelescopeS Optics for the same was fabricated in the Optical shop of the Institute. Thepaper describes the technology used in making 2.34 M ...
  • Maben, Sunayana; Bharat Kumar, Y; Reddy, B. E; Campbell, Simon W; Zhao, Gang (Oxford University Press on behalf of Royal Astronomical Society, 2023-11)
    Based on the Apache Point Observatory Galactic Evolution Experiment survey we conducted a search for carbon-deficient red giants (CDGs). We found 103 new CDGs, increasing the number in the literature by more than a factor ...
  • Ravichandran, S; Preethi, K; Safonova, M; Murthy, J (Springer, 2013-04)
    The Ultraviolet Imaging Telescope (UVIT) is scheduled to be launched as a part of the ASTROSAT satellite. As part of the mission planning for the instrument we have studied the efficacy of UVIT observations for interstellar ...
  • The Director, Solar Physics Observatory (National Institute of Science Communication And Information Resources, 1946-11)
  • Sivaraman, K. R (International Astronomical Union, 1990)
    One of the results of a study on the migration of H-alpha filaments, namely, the existence of meridional flow on the sun, is presented and extended to show the participation of this meridional flow in the solar cycle ...
  • Makarov, V. I; Sivaraman, K. R (Springer, 1991)
    The global solar cycle is considered as an interaction of 3 types of activity: at low-latitude (sunspots), at high-latitude (polar faculae) and the weak magnetic field. The properties of single and 3-fold reversals of the ...
  • Morel, T; Marchenko, S. V; Pati, A. K; Kuppuswamy, K; Carini, M. T; Wood, E; Zimmerman, R (The Royal Astronomical Society, 2004-06)
    We present the results of a long-term monitoring campaign of the Hα line in a sample of bright OB supergiants (O7.5-B9) which aims at detecting rotationally modulated changes potentially related to the existence of large-scale ...
  • Subbarayan, A; Balasubramanian, C; Narayandass, Sa. K (Indian Institute of Astrophysics, Bangalore, 1991)
    Perylene thin films were deposited on cleaned glass substrates by ion plating technique in r.f.glow (10 MHz) sustained by argon gas of pressure 0.399 Pa. Laser-induced damage threshold of these thin films has been studied ...
  • Saha, S. K (Indian Association for the Cultivation of Science, 2006)
    A large telescope encodes the information about the source, but unable to get the di raction-limited informations. Due to the inhomogeneity of the propagating medium that carries the light to the Earth's surface, the ...
  • Reiners, A; Banyal, R. K; Ulbrich, R. G (EDP Sciences, 2014-09)
    State-of-the-art Doppler experiments require wavelength calibration with precision at the cm s − 1 level. A low-finesse Fabry-Pérot interferometer (FPI) can provide a wavelength comb with a very large ...
  • Raichur, H; Mousumi Das; Herrero, A. A; Shastri, P; Kantharia, N. G (Springer, 2015-04)
    NGC 5905 is one of the few galaxies with no prior evidence for an active galactic nucleus (AGN) in which an X-ray flare was detected by the ROSAT All Sky Survey (RASS) in 1990–1991. Follow-up studies showed that the X-ray ...
  • Jasniewicz, G; Parthasarathy, M; de Laverny, P; Thévenin, F (European Southern Observatory, 1999-02)
    de la Reza et al. (1997) suggested that all K giants become Li-rich for a short time. During this period the giants are associated with an expanding thin circumstellar shell supposedly triggered by an abrupt internal mixing ...
  • Castro-Tirado, A. J; McBreen, S; Jelínek, M; Pandey, S. B; Bremer, M; de Ugarte Postigo, A; Gorosabel, J; Guziy, S; Bihain, G; Caballero, J. A; Ferrero, P; de Jong, J; Misra, K; Sahu, D. K (American Institute of Physics, 2006-05)
    We present multiwavelength observations of the latest two GRB detected by Hete-2 in 2005. For GRB 051022, no optical/nIR afterglow has been detected, in spite of the strong gamma-ray emission and the reported X-ray afterglow ...
  • Pandey, K. K; Hiremath, K. M; Yellaiah, G (Springer, 2017-06)
    The time interval, between two highest peaks of the sunspot maximum, during which activity energy substantially absorbed is called Gnevyshev gap. In this study we focus on mysterious evolution of the Gnevyshev gap by ...
  • Mandal, Sudip; Karak, B. B; Banerjee, D (2017-12)
    In this paper, we explore the evolution of sunspot latitude distribution and explore its relations with the cycle strength. With the progress of the solar cycle, the distributions in two hemispheres from mid-latitudes ...
  • Pandey, K. K; Yellaiah, G; Hiremath, K. M (Springer, 2015-04)
    We present statistical analysis of about 63000 soft x-ray flare (class ≥C) observed by geostationary operational environmental satellite (GOES) during the period 1976-2008. Class wise occurrence of soft X-ray (SXR) flare ...
  • Vishveshwara, C. V (Current Science Association, 2000-04)

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