Browsing by Title

Sort by: Order: Results:

  • Static structure of chameleon dark matter as an explanation of dwarf spheroidal galaxy cores 
    Das, Subinoy; Prolay Krishna Chanda (The American Physical Society, 2017-04)
    We propose a novel mechanism that explains the cored dark matter density profile in recently observed dark matter rich dwarf spheroidal galaxies. In our scenario, dark matter particle mass decreases gradually as a function ...
  • Stationary calcium in space 
    Evershed, John (Taylor and Francis, 1924)
  • Statistical detection of propagating waves in a polar coronal hole 
    Gupta, G. R; O'Shea, E; Banerjee, D; Popescu, M; Doyle, J. G (Springer, 2010)
    Waves are important in the heating of the solar corona and the acceleration of the solar wind. We have examined a long spectral time series sampling a southern coronal hole, observed on the 25 February 1997 using the SUMER ...
  • Statistical mechanics of velocity and magnetic fields in solar active regions 
    Krishan, V (Springer, 1985-02)
    A statistical mechanics of the velocity and magnetic fields is formulated for an active region plasma. The plasma subjected to the conservation laws emerges in a most probable state which is described by an equilibrium ...
  • Statistical properties of galactic synchrotron temperature and polarization maps — a multi-frequency comparison 
    Fazlu, Rahman; Pravabati, C; Ghosh, Tuhin (IOP Publishing, 2024-01)
    Understanding the statistical properties of synchrotron emission from our Galaxy is valuable from the perspective of observations targeting signals of cosmological origin, as well as for understanding physical processes ...
  • A Statistical Study of 3EG Source Characteristics 
    Sharma, M; Kaul, R. K (Astronomical Society of India, 2003)
    A detailed statistical study of 3EG source characteristics and their variation as a function of galactic latitude shows that a majority of Unidentified sources at mid galactic latutudes are so-far undetected AGN.
  • A Statistical Study of Low-Frequency Solar Radio Type III Bursts 
    Mahender, A; Sasikumar Raja, K; Ramesh, R; Panditi, V; Monstein, C; Yellaiah, G (Springer, 2020-11)
    We have studied low-frequency (45 – 410 MHz) type III solar radio bursts observed using the e-Compound Astronomical Low-cost Low-frequency Instrument for Spectroscopy and Transportable Observatory (e-CALLISTO) spectrometer ...
  • Statistical Study of Magnetic Nonpotential Measures in Confined and Eruptive Flares 
    Vasantharaju, N; Vemareddy, P; Ravindra, B; Doddamani, V. H (IOP Publishing, 2018-06-10)
    Using Solar Dynamics Observatory/Helioseismic and Magnetic Imager vector magnetic field observations, we studied the relation between the degree of magnetic non-potentiality with the observed flare/coronal mass ejection ...
  • Statistical study of network jets observed in the solar transition region: a comparison between coronal holes and quiet-sun regions 
    Narang, Nancy; Arbacher, R. T; Tian, H; Banerjee, D; Cranmer, S. R; DeLuca, Ed E; McKillop, S (Springer, 2014-04)
    Recent IRIS observations have revealed a prevalence of intermittent small-scale jets with apparent speeds of 80 – 250 km s−1, emanating from small-scale bright regions inside network boundaries of coronal holes. We find ...
  • A statistical study of plasmoids associated with a post-CME current sheet 
    Ritesh Patel; Pant, Vaibhav; Chandrashekhar, K; Banerjee, D (EDP Sciences, 2020-12)
    Context. Coronal mass ejections (CMEs) are often observed to be accompanied by flare, current sheets, and plasmoids/plasma blobs. 2D and 3D numerical simulations and observations reported plasmoids moving upward as well ...
  • A statistical study of solar radio Type III bursts and spaceweather implication 
    Ndacyayisenga, T; Uwamahoro, J; Raja, K. S; Monstein, C (Elsevier B.V, 2021-02-15)
    olar radio bursts (SRBs) are the signatures of various phenomenon that happen in the solar corona and interplanetary medium (IPM). In this article, we have studied occurrence of Type III bursts and their association with ...
  • A statistical study of the characteristics of type II doublet radio bursts 
    Subramanian, K. R; Ebenezer, E (EDP Sciences, 2006-05)
    Aims.We study the characteristics of doublet type II radio bursts in which two type II bursts occur in sequence and investigate their drivers. Methods.37 type II bursts reported by the Culgoora radio observatory in the ...
  • A statistical study of wave propagation in coronal holes 
    O`Shea, E; Banerjee, D; Doyle, J. G (Astronomy and Astrophysics, Vol. 463, pp. 713 - 725, 2007-02)
    Aims.To find evidence for propagating magnetoacoustic waves in equatorial and polar coronal hole locations. Methods: Using temporal series data from the Coronal Diagnostic Spectrometer (CDS) on SOHO, we study oscillations ...
  • A Statistical Study on the Frequency-dependent Damping of the Slow-mode Waves in Polar Plumes and Interplumes 
    Mandal, Sudip; Krishna Prasad, S; Banerjee, D (IOP Publishing, 2018-02)
    We perform a statistical study on the frequency-dependent damping of slow waves propagating along polar plumes and interplumes in the solar corona. Analysis of a large sample of extreme ultraviolet imaging data with ...
  • Statistics of occurrence of giant pulses from PSR 0950+08 
    Singal, A. K; Vats, H. O; Deshpande, M. R (Astronomical Society of India, 2000)
  • Status of HAGAR, the high altitude gamma ray observatory at Hanle 
    Chitnis, V. R; Acharya, B. S; Bhat, P. N; Cowsik, R; Prabhu, T. P; Srinivasan, R; Srivatsan, R; Vishwanath, P. R (Tata Institute of Fundamental Research, 2005)
    A 7 telescope array is planned to be constructed at Hanle in the Himalayas at an altitude of about 4200m above mean sea level for detecting celestial gamma-rays. The atmospheric Cerenkov light pool created by the ...
  • Status of the Himalayan Gamma-Ray Observatory (HIGRO) and observation with HAGAR at very high energies 
    Britto, R. J; Acharya, B. S; Anupama, G. C; Bhatt, N; Bhattacharjee, P; Bhattacharya, S; Chitnis, V. R; Cowsik, R; Dorji, N; Duhan, S. K; Gothe, K. S; Kamath, P. U; Koul, R; Mahesh, P. K; Manoharan, J; Mitra, A; Nagesh, B. K; Parmar, N. K; Prabhu, T. P; Rannot, R. C; Rao, S. K; Saha, L; Saleem, F; Saxena, A. K; Sharma, S. K; Shukla, A; Singh, B. B; Srinivasan, R; Srinivasulu, G; Sudersanan, P. V; Tickoo, A. K; Tsewang, D; Upadhya, S. S; Vishwanath, P. R; Yadav, K. K (French Society of Astronomy and Astrophysics, 2011-12)
    High Altitude GAmma Ray (HAGAR) telescope array, which is the first stage of HImalayan Gamma Ray Observatory (HIGRO), has been successfully installed at Hanle in Himalayas and has been collecting science data since September, ...
  • Steady and fluctuating parts of sun's internal magnetic field 
    Gokhale, M. H; Hiremath, K. M (International Astronomical Union, 1993-01)
    We have modeled the 'steady' part of sun's internal poloidal magnetic field in the form of a central dipole and a central hexapole with strengths (0.6 +/- 0.1)B(o)R(0) exp 3 and (0.16 +/- 0.05)B(o)R(0) exp 5 embedded in ...
  • Steady part of rotation and toroidal component of magnetic field in the solar convective envelope 
    Hiremath, K. M (Astronomical Society of India, 2001)
    With reasonable assumptions and approximations, we solve analytically the full set of Chandrasekhar's (1956) MHD equations in the convective envelope, for steady part of rotation and toroidal component of the magnetic field ...
  • Steady part of the sun's internal rotation 
    Hiremath, K. M; Gokhale, M. H (Astronomical Society of India, 1998)
    It is shown that steady part of rotation in the Sun's convective envelope (CE) and radiative core (RC)can be determined as an analytical solution of the diffusion equation in an incompressible medium of constant diffusivity. ...

Search DSpace

Browse

My Account