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Browsing IIAP Publications by Title

Browsing IIAP Publications by Title

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  • 26 Al Readioactive decay and gamma ray background 
    Sivaram, C (International Cosmic Ray, 1990)
  • 2D radiative equilibrium models of magnetic flux tubes 
    Hasan, S. S; Kalkofen, W; Steiner, O (Kluwer Academic Publishers, 1999)
  • The 3-Dimensional Distribution of Interstellar Dust 
    Murthy, J (Cambridge University Press, 2014-01)
    A knowledge of the three dimensional distribution of interstellar dust is critical in interpreting all observations of the sky, particularly in the understanding of the structure and morphology of our Galaxy. It has been ...
  • 3.0 to 3.5 micron spectrum of V 348 SGR and R CrB 
    Nandy, K; Kameswara Rao, N; Morgan, D. H (D. Reidel Publishing Co, 1986)
    With a view to search for weaker dust spectral features the authors obtained the spectrum of R CrB and V348 Sgr with higher resolution than employed before.
  • The 3.6 metre Devasthal optical telescope: from inception to realization 
    Sagar, R; Kumar, Brijesh; Omar, A (Indian Academy of Sciences, 2019-08-10)
    India’s largest 3.6 metre Devasthal Optical Telescope (DOT) was commissioned in 2016, though the idea of building it germinated way back in 1976. This article provides research accounts as well as glimpses of its nearly ...
  • 3.6-m Devasthal Optical Telescope Project: Completion and first results 
    Kumar, Brijesh; Omar, A; Maheswar, G; Pandey, A. K; Sagar, R; Uddin, W; Sanwal, B. B; Bangia, T; Kumar, T. S; Yadav, S; Sahu, S; Pant, J; Reddy, B. K; Gupta, A. C; Chand, H; Pandey, J. C; Joshi, M. K; Jaiswar, M; Nanjappa, N; Purushottam; Yadav, R. K. S; Sharma, S; Pandey, S. B; Joshi, S; Joshi, Y. C; Lata, S; Mehdi, B. J; Misra, K; Singh, M (Societe Royale des Sciences de Liege, 2018-04)
    We present an update on the 3.6-m aperture optical telescope, which has been installed at Devasthal in the year 2016. In this paper, a brief overview of installation activities at site and first results are presented. The ...
  • 3D Simulations of realistic power halos in magnetohydrostatic sunspot atmospheres: linking theory and observation 
    Rijs, C; Rajaguru, S. P; Przybylski, D; Moradi, H; Cally, P. S; Shelyag, S (IOP Publishing, 2016-01)
    The well-observed acoustic halo is an enhancement in time-averaged Doppler velocity and intensity power with respect to quiet-Sun values that is prominent for the weak and highly inclined field around the penumbra ...
  • 3He Rich Solar Flares 
    Ramadurai, S (Indian Institute of Astrophysics, Bangalore, 1986)
    The various observational features of the 3He rich solar flares like their characteristics and association with other phenomena are discussed. It is shown that 3He rich flares split into two distinct groups, if one plots ...
  • The 4-m International Liquid Mirror Telescope 
    Surdej, J; Hickson, P; Borra, E; Swings, J; Habraken, S; Akhunov, T; Bartczak, P; Chand, H; De Becker, M; Delchambre, L; Finet, F; Kumar, B; Pandey, A; Pospieszalska, A; Pradhan, B; Sagar, R; Wertz, O; De Cat, P; Denis, S; de Ville, J; Jaiswar, M. K; Lampens, P; Nanjappa, N; Tortolani, J (Societe Royale des Sciences de Liege, 2018-04)
    The 4-m International Liquid Mirror Telescope (ILMT) is presently (March-June 2017) being erected on the ARIES site in Devasthal (Uttarakhand). We describe and illustrate in the present paper its different components. ...
  • A 500 parsec halo surrounding the galactic globular NGC 1851 
    Olszewski, E. W; Saha, A; Knezek, P; Subramaniam, A; de Boer, T; Seitzer, P (American Astronomical Society, 2009-12)
    Using imaging that shows 4 mag of main-sequence stars, we have discovered that the Galactic globular cluster NGC 1851 is surrounded by a halo that is visible from the tidal radius of 700 arcsec (41 pc) to more than 4500 ...
  • The 50cm robotic telescope: control system upgrade and automation 
    Stanzin, Tsewang; Jorphail, S; Parihar, P. S; Angchuk, D; Dorjai, T; Gyalson, T; Mahey, T. T; Dorjay, Padma; Dorjay, Phuntsok; Phunchok, Tsewang; Pamber, Tashi; Stanzin, Urgain; Angdu, Skalzang (SPIE-The International Society for Optical Engineering, 2022-08)
    We describe the details into the design and development of a low-cost yet efficient telescope control system (TCS) and observatory control software (OCS) for the 50cm telescope at the Indian Astronomical Observatory. The ...
  • 5303Å Coronal Irradiance and Its Relation to the Photospheric Magnetic Activity 
    Ramesh, K. B (Kluwer Academic Publishers, 1998-12)
    The association of Lomnický Štít data of coronal green line irradiance (CI) to photospheric magnetic activity is studied for the years 1975-1994 using the Carrington rotation averaged photospheric magnetic flux data. It ...
  • Ab initio calculation of P, T-odd interaction constant in BaF: a restricted active space configuration interaction approach 
    Nayak, M. K; Chaudhuri, R. K (Institute of Physics, 2006-03)
    A fully relativistic restricted active space (RAS) configuration interaction (CI) approach is employed to compute the P, T-odd interaction constant W/subd of the ground 2/supΣ state of BaF. The present calculation estimates ...
  • Ab initio calculation of P,T-odd effects in YbF molecule 
    Nayak, M; Chaudhuri, R. K (Elsevier, 2006-02)
    A fully-relativistic restricted active space (RAS) configuration interaction (CI) approach is employed to compute the P,T-odd interaction constant Wd of the ground (2Σ) state of YbF. A series of increasingly sophisticated ...
  • Ab initio calculation of the electron-nucleus scalar-pseudoscalar interaction constant Ws in heavy polar molecules 
    Nayak, M. K; Chaudhuri, R. K; Das, B. P (The American Physical Society, 2007-02)
    A fully relativistic restricted active space configuration interaction method is employed to compute the P,T-odd interaction constant Ws for the ground (2Sigma1/2) state of YbF and BaF molecules, which yield the results ...
  • Ab initio calculations of forbidden transition amplitudes and lifetimes of the low-lying states in V4+ 
    Dixit, G; Sahoo, B. K; Chaudhuri, R. K; Majumder, S (The American Physical Society, 2007-10)
    We report electric quadrupole (E2) and magnetic dipole (M1) transition amplitudes of the first few low-lying states of quadruply ionized vanadium (V4+), which are important in various experimental applications and astrophysics. ...
  • Ab initio description of the ground and excited states of cyanogen isomers 
    Chaudhuri, R. K; Krishnamachari, S. L. N. G; Freed, K. F (Elsevier, 2006-08)
    Ab initio calculations are used to characterize the ground and low lying excited electronic states of several linear and cyclic isomers of cyanogen. In particular, the calculations consider the excitation energies for ...
  • Ab initio determination of polarizabilities and van der Waals coefficients of Li atoms using the relativistic coupled-cluster method 
    Wansbeek, L. W; Sahoo, B. K; Timmermans, R. G. E; Das, B. P; Mukherjee, D (The American Physical Society, 2008-07)
    We report on a technique to determine the van der Waals coefficients of lithium (Li) atoms based on relativistic coupled-cluster theory. These quantities are determined using the imaginary parts of the scalar dipole and ...
  • Ab initio determination of the lifetime of the 6(2)P(3/2) state for Pb-207(+) by relativistic many-body theory 
    Sahoo, B. K; Majumder, S; Chaudhuri, R. K; Das, B. P; Mukherjee, D (Institute of Physics, 2004-09)
    Relativistic coupled-cluster theory has been employed to calculate the lifetime of the 6(2)P(3/2) state of singly ionized lead (207Pb) and compared with the corresponding values obtained from second-order relativistic ...
  • Ab initio determination of the P- and T-violating coupling constants in atomic Xe by the relativistic-coupled-cluster method 
    Singh, Y; Sahoo, B. K; Das, B. P (The American Physical Society, 2014-03)
    The parity (P) and time-reversal (T) odd coupling constant associated with the tensor-pseudotensor (T-PT) electron-nucleus interaction and the nuclear Schiff moment (NSM) have been determined by combining the result of the ...

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