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Browsing IIAP Publications by Title

Browsing IIAP Publications by Title

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  • Extragalactic star formation rate -- estimates at different wavelengths 
    Prabhu, T. P (Astronomical Society of India, 2012)
    The star formation rate (SFR) in galaxies is of prime importance in the study of formation and evolution of galaxies. Different methods have hence been evolved to estimate the current SFR in galaxies, using indicators at ...
  • Extragalactic survey of UV Galaxies using GALEX 
    Bose, L. S; Narayanankutty, K; Sujatha, N. V; Murthy, J (International Organization Of Scientific Research (IOSR), 2014-05)
    We report here the results of the study of extragalactic radiation using number counts of galaxies at high galactic latitudes. For this study nine GALEX DIS targets around ELAISN1 in the North Pole. The overlapped regions ...
  • Extragalactic survey using GALEX–spitzer matching fields 
    Bose, L. S; Sujatha, N. V; Narayanankutty, K; Murthy, J (Pleiades Publishing, 2015-12)
    We have used Spitzer observations of galaxies in the ELAIS-N1 region centered at 16h10m01s, +54◦30′36″ to extend the effective sensitivity of GALEX UV observations of the same region. Spitzer is more sensitive to external ...
  • Extrapolating SMBH correlations down the mass scale: the case for IMBHs in globular clusters 
    Safonova, M; Shastri, P (Springer, 2010-01)
    Empirical evidence for both stellar mass black holes (M (aEuro cent)< 10(2) M (aS (TM))) and supermassive black holes (SMBHs, M (aEuro cent)> 10(5) M (aS (TM))) is well established. Moreover, every galaxy with a bulge ...
  • Extrapolating Zernike Moments to Predict Future Optical Wave-fronts in Adaptive Optics Using Real Time Data Mining 
    Vyas, A; Roopashree, M. B; Prasad, B. R (David Publishing Company, 2011-03)
    We present the details of predicting atmospheric turbulence by mining Zernike moment data obtained from simulations as well as experiments. Temporally correlated optical wave-fronts were simulated such that they followed ...
  • The extraterrestrial Raman-scattering 
    Krishan, V (Indian Academy of Sciences, 1993-03-10)
    The diagnostic potential of the Raman scattering of the electro-magnetic radiation has been realized in an all embracing manner in terrestrial phenomena. Our knowledge of the remote reaches of the universe comes almost ...
  • Extremal charged black holes, dark matter and dark energy 
    Sivaram, C; Arun, K; Prasad, A (Springer, 2018-10)
    Formation of black holes may be constrained by intrinsic parameters characterizing them such as electric charge. Here we discuss the effects of a relatively minute excess of charge on extremal black hole formation and the ...
  • The Extreme Solar Activity during October–November 2003 
    Hiremath, K. M; Lovely, M. R; Kariyappa, R (Indian Academy of Sciences, 2006-09)
    The positional measurements of sunspots from the Kodaikanal Observatory and Solar Geophysical data are used to study the association between occurrence of the abnormal activities of big sunspot groups that were observed ...
  • The extreme ultraviolet deficit: jet connection in the quasar 1442+101 
    Punsly, B; Marziani, P; Kharb, P; O'Dea, C. P; Vestergaard, M (IOP Publishing, 2015-10-10)
    In previous studies, it has been shown that the long-term time-averaged jet power, Q, is correlated with spectral index in the extreme ultraviolet (EUV), αEUV (defined by n ~ n-a F EUV computed between 700 and 1100 Å ). ...
  • Extreme-energy cosmic rays: hints to new physics beyond the standard model? 
    Bhattacharjee, P; Sigl, G (Springer, 2001)
    The observed extreme energy cosmic ray (EECR) events above 10(20) eV are difficult to explain within tile standard scenario of origin of cosmic rays in which charged particles are accelerated in magnetized shocks in powerful ...
  • f Gravity and gravitational singularities 
    Sivaram, C; Sinha, K. P; Lord, E. A (Nature Publishing Group, 1974-06)
    TRAUTMAN has postulated1 that the usual space-time singularity occurring in classical cosmological models and in the gravitational collapse of massive objects could be averted if intrinsic spin effects are incorporated ...
  • f-gravity and Dirac's large numbers hypothesis 
    Sivaram, C; Sinha, K. P (Elsevier, 1976-01)
    The identification of the strong f-gravity metric with Dirac's atomic metric and the large value of its coupling constant, i.e. Gf 10/sup39 GN (GN being Newtonian constant) provides the physical basis for the large numbers ...
  • F-region changes associated with the solar flare of 23 February 1956 
    Bhargava, B. N; Subrahmanyan, R. V (Elsevier Ltd., 1962-04)
  • F-region oscillations observed during October 24, 1995 solar eclipse at Waltair 
    Rao, B. M; Anhjaneyulu, P (Indian Institute of Astrophysics, Bangalore, 1997)
    Measurements of changes in phase path/Doppler of HF signals on 5.5 MHz from F-region of the ionosphere are carried-out using coherent pulsed Doppler radar. Preliminary analysis of the data show large deviations in phase ...
  • Fabrication and characterization of SLG/Mo/CZTS/CdS/i-ZnO/Al:ZnO/Al thin film solar cell device 
    Suman, R; Revathy, M. S; Priyal, M; Chitravel, T; Kumar, T. P (National Institute of Research and Development for Optoelectronics, 1905-07)
    A cost effective p-type Copper zinc tin selenide Cu2ZnSnSe4 (CZTSe) thin film was fabricated on molybdenum (Mo) coated soda lime glass substrate by sputtering method followed by rapid thermal processed (RTP) selenization. ...
  • Fabrication of Gradient-Index lens by Ion-Exchange in Glass 
    Masalkar, P. J; Rao, V. V; Sirohi, R. S (Indian Institute of Astrophysics, Bangalore, 1991)
    GRIN lenses have been fabricated using Ag/sup+/ < -- > Na/sup+/ ion-exchange in glass. The fabrication process and characterization of GRIN lenses are discussed. The refractive index profile was studied on the Mach-Zehnder ...
  • Fabry-Perot based narrow band imager for solar filament observations 
    Sajal Kumar Dhara; Ravindra, B; Banyal, R. K (IOP Publishing, 2016-01)
    We have recently developed a narrow band imager (NBI) using a n air gap based Fabry-P ́erot (FP) interferometer at the Indian Institute of Astrophysic s, Bangalore. Narrow band imaging is achieved by using an FP ...
  • Fabry-Perot interferometric observations of the coronal red and green lines during the 1983 Indonesian eclipse 
    Chandrasekhar, T; Ashok, N. M; Desai, J. N; Pasachoff, J. M; Sivaraman, K. R (Optical society of America, 1984-02)
    A dual-channel Fabry-Perot interferometric system was used to study simultaneously the coronal emission lines at 5303 Å (Fe XIV) and at 6374 Å (Fe X). Initial results indicate an emission corona confined largely within 1.2 ...
  • Fabry-Perot Interferometric Observations of the Solar Corona in the Green Line 
    Raju, K. P; Singh, J; Muralishankar, S (Indian Institute of Astrophysics, Bangalore, 1997)
    An imaging Fabry-Perot interferometer was designed and used for coronal observations in the green line (FeXIV) 5303 Armstrong. The observations were carried our at Nim Ka Thana, Rajasthan, India during the total solar ...
  • Facilities at Indian Institute of Astrophysics and New Initiatives 
    Bhatt, B. C (Societe Royale des Sciences de Liege, 2018-04)
    The Indian Institute of Astrophysics is a premier national institute of India for the study of and research into topics pertaining to astronomy, astrophysics and related subjects. The Institute’s main campus in Bangalore ...

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