IIAP Publications: Recent submissions

  • Gauribidanur low-frequency solar spectrograph 
    Kishore, P; Kathiravan, C; Ramesh, R; Rajalingam, M; Barve, Indrajit V (Springer, 2014-10)
    A new radio spectrograph, dedicated to observe the Sun, has been recently commissioned by the Indian Institute of Astrophysics (IIA) at the Gauribidanur Radio Observatory, about 100 km North of Bangalore. The instrument, ...
  • Spitzer Mid-IR Spectroscopy of Powerful 2JY and 3CRR Radio Galaxies. II. AGN Power Indicators and Unification 
    Dicken, D; Tadhunter, C; Morganti, R; Axon, D; Robinson, A; Magagnoli, M; Kharb, P; Almeida, C. R; Mingo, B; Hardcastle, M; Nesvadba, N. P. H; Singh, V; Kouwenhoven, M. B. N; Rose, M; Spoon, H; Inskip, K. J; Holt, J (IOP Publishing, 2014-06-20)
    It remains uncertain which continuum and emission line diagnostics best indicate the bolometric powers of active galactic nuclei (AGNs), especially given the attenuation caused by the circumnuclear material and the possible ...
  • Seismic imaging of crust beneath the Dharwar Craton, India, from ambient noise and teleseismic receiver function modelling 
    Borah, K; Rai, S. S; Prakasam, K. S; Gupta, S; Priestley, K; Gaur, V. K (Oxford University Press on behalf of the Royal Astronomical Society, 2014-05)
    We use cross-correlation of continuous 18 months (2009 February to 2010 August) ambient noise data recorded over 35 broad-band seismographs in the Archean Dharwar Craton and the adjoining granulite terrain to generate ...
  • The peculiar radio-loud narrow line seyfert 1 galaxy 1H 0323+342 
    Paliya, Vaidehi S; Sahayanathan, S; Parker, M. L; Fabian, A. C; Stalin, C. S; Anjum, A; Pandey, S. B (IOP Publishing, 2014-07-10)
    We present a multi-wavelength study of the radio-loud narrow line Seyfert 1 galaxy (NLSy1), 1H 0323+342, detected by Fermi Gamma Ray Space Telescope. Multi-band light curves show many orphan X-ray and optical flares having ...
  • Very large baseline array observations of Mrk 6: probing the jet–lobe connection 
    Kharb, P; O'Dea, C. P; Baum, S. A; Hardcastle, M. J; Dicken, D; Croston, J. H; Mingo, B; Noel-Storr, J (Oxford University Press on behalf of the Royal Astronomical Society, 2014-06-01)
    We present the results of high-resolution VLBI (very long baseline interferometry) observations at 1.6 and 4.9 GHz of the radio-loud Seyfert galaxy, Mrk 6. These observations are able to detect a compact radio core in this ...
  • 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 ...
  • Relativistic equation-of-motion coupled-cluster method: Application to closed-shell atomic systems 
    Pathak, H; Sahoo, B. K; Das, B. P; Vaval, N; Pal, S (The American Physical Society, 2014-04)
    We report our successful implementation of the relativistic equation-of-motion coupled-cluster (EOMCC) method. This method is employed to compute the principal ionization potentials (IPs) of closed-shell rare-gas atoms, ...
  • Polarized Scattering with Paschen-Back Effect, Hyperfine Structure, and Partial Frequency Redistribution in Magnetized Stellar Atmospheres 
    Sowmya, K; Nagendra, K. N; Stenflo, J. O; Sampoorna, M (IOP Publishing, 2014-05-10)
    F-state interference significantly modifies the polarization produced by scattering processes in the solar atmosphere. Its signature in the emergent Stokes spectrum in the absence of magnetic fields is depolarization in ...
  • Analysis of the solar coronal green line profiles from eclipse observations 
    Maya Prabhakar; Raju, K. P; Chandrasekhar, T (Astronomical Society of India, 2013)
    Analysis of the solar coronal green line profiles reveals information regarding the physical conditions of the solar corona like temperature, density, Doppler velocity, non-thermal velocity etc. It provides insights to the ...
  • Models of force-free spheres and applications to solar active regions 
    Avijeet Prasad; Mangalam, A (Astronomical Society of India, 2013)
    Here we present a systematic study of force-free field equation for simple axisymmetric configurations in spherical geometry. The condition of separability of solutions in radial and angular variables leads to two classes ...
  • On the relationship between masses of Sun like G-stars and their exoplanets 
    Gurumath, Shashanka R; Hiremath, K. M; Ramasubramanian, V (Serials Publications Pvt. Ltd., 2014-08)
    Right from dawn of the civilization, human’s quest for understanding the genesis of solar system formation remains elusive. There are many unanswered questions; to cite few: (i) How sun and solar system is formed? ...
  • Preserving our scientific heritage 
    Birdie, C; Vagiswari, A; Indira Chowdhury (Current Science Association, 2008-05-10)
  • Stellar populations in the magellanic clouds 
    Subramanian, S; Subramaniam, A (Astronomical Society of India, 2013)
    The structural parameters of the Large Magellanic Cloud and the Small Magellanic Cloud are derived from the study of di erent stellar populations, such as, Cepheids (age 100 Myr), Red Clump stars (age 2-9 Gyr) and RR ...
  • Classification and disk parameters of Herbig Ae/Be stars using WISE and AKARI data 
    Subramaniam, A; Adara, B (Astronomical Society of India, 2013-12)
    We present the classification and disk parameters of 50 Herbig Ae/Be stars using WISE and AKARI data. These stars have been classified into 4 groups based on the scheme proposed by Koenig et al. (2012) using WISE pass bands ...
  • Primordial black holes as heat sources for living systems with longest possible lifetimes 
    Sivaram, C; Arun, K; Kiren, O. V (Springer, 2014-06)
    Just forty years ago, Hawking wrote his famous paper on primordial black holes (PBH). There have been since innumerable discussions on the consequences of the existence of such exotic objects and ramifications of their ...
  • Separable solutions of force-free spheres and applications to solar active regions 
    Avijeet Prasad; Mangalam, A; Ravindra, B (IOP Publishing, 2014-05-10)
    In this paper, we present a systematic study of the force-free field equation for simple axisymmetric configurations in spherical geometry and apply it to the solar active regions. The condition of separability of solutions ...
  • Orbital signatures from observed light curves of blazars 
    Mangalam, A; Mohan, Prashanth (Indian Academy of Sciences, 2014-04)
    Variability in active galactic nuclei is observed in ultraviolet to X-ray emission based light curves. This could be attributed to orbital signatures of the plasma that constitutes the accretion flow on the putative disk ...
  • Parametric models of the periodogram 
    Mohan, Prashanth; Mangalam, A; Chattopadhyay, S (Indian Academy of Sciences, 2014-04)
    The maximum likelihood estimator is used to determine fit parameters for various parametric models of the Fourier periodogram followed by the selection of the best fit model amongst competing models using the Akaike ...
  • Coronal hole oscillations inferred from the SDO/AIA data 
    Hegde, M; Hiremath, K. M; Doddamani, V. H (Elsevier B.V, 2014-07-15)
    With high temporal resolution (12 sec) of about two hours duration, data of a coronal hole structure in 171°A, 193°A and 211°A taken from SDO/AIA images is considered for examination of oscillations. After estimating the ...
  • Chemical Compositions of RV Tauri Stars and Related Objects 
    Sumangala Rao, S; Giridhar, S (Institute de Astronomia, 2014-04)
    We have undertaken a comprehensive abundance analysis for a sample of relatively unexplored RV Tauri and RV Tauri like stars to further our understanding of post-Asymptotic Giant Branch (post-AGB) evolution. From our study ...

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