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Browsing IIAP Publications by Title

Browsing IIAP Publications by Title

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  • 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.
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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. ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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. ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • Chattopadhyay, Sudip; Chaudhuri, R. K; Mahapatra, Uttam Sinha (John Wiley & Sons, 2011-10)
    We present improved virtual orbital (IVO) complete active space (CAS) configuration interaction (IVO-CASCI) and IVO-CASCI-based multireference Møller–Plesset perturbation theory (MRMPPT) calculations with an aim to elucidate ...
  • Dixit, G; Nataraj, H. S; Sahoo, B. K; Chaudhuri, R. K; Majumder, S (The American Physical Society, 2008-01)
    This work presents accurate ab initio determination of the hyperfine splitting for the ground state and few low-lying excited states of 113Cd+; important candidates for the frequency standard in the microwave region, using ...
  • Peraiah, A (American Astronomical Society, 1987-06)
    The effects of aberration and advection terms in the fluid-frame steady-state radiative-transfer equation are evaluated by means of numerical computations for plane-parallel media moving at velocities 1000, 2000, 3000, ...
  • Peraiah, A (American Astronomical Society, 1991-04)
    The extreme outer layers of supernovae, novae, AGN, QSOs, and many supergiant stars are known to be in rapid expansion or contraction. In this paper, aberration and advection effects in a spherical medium scattering radiation ...

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