IIAP Publications: Recent submissions

  • Broadband observations of the gamma-ray emitting narrow line Seyfert 1 galaxy SBS 0846+513 
    Paliya, Vaidehi S; Rajput, Bhoomika; Stalin, C. S; Pandey, S. B (IOP Publishing, 2016-03)
    We present the results of our broadband study of the γ -ray emitting narrow line Seyfert 1 ( NLSy1 ) galaxy SBS 0846 + 513 ( z = 0.585 ) . This includes multiband fl ux variations, γ -ray spectral analysis, ...
  • Forward modeling of propagating slow waves in coronal loops and their frequency-dependent damping 
    Mandal, Sudip; Magyar, N; Yuan, D; Van Doorsselaere, T; Banerjee, D (IOP Publishing, 2016-03)
    Propagating slow waves in coronal loops exhibit a damping that depends upon the frequency of the waves. In this study we aim to investigate the relationship of the damping length ( L d ) with the frequency of the ...
  • The infrared imaging spectrograph (IRIS) for TMT: latest science cases and simulations 
    Wright, S. A; Walth, G; Do, T; Marshal, D; Larkin, J. E; Moore, A. M; Adamkovics, M; Andersen, D; Armus, L; Barth, A; Cote, Patrick; Cooke, J; Chisholm, E. M; Davidge, T; Dunn, J. S; Dumas, C; Ellerbroek, B. L; Ghez, A. M; Hao, J; Hayano, Y; Liu, M; Lopez-Rodriguez, E; Lu, J. R; Mao, S; Marois, C; Pandey, S. B; Phillip, A. C; Schoeck, M; Subramaniam, A; Subramanian, S; Suzuki, R; Tan, J. C; Terai, T; Treu, T; Simard, L; Weiss, J. (SPIE-The International Society for Optical Engineering, 2016-07)
    The Thirty Meter Telescope (TMT) first light instrument IRIS (Infrared Imaging Spectrograph) will complete its preliminary design phase in 2016. The IRIS instrument design includes a near-infrared (0.85 - 2.4 micron) ...
  • C1XS results—first measurement of enhanced sodium on the lunar surface 
    Athiray, P. S; Narendranath, S; Sreekumar, P; Grande, M (Elsevier B.V, 2014-12)
    We describe the first unambiguous evidence of enhanced sodium on the lunar surface revealed by the Chandrayaan-1 X-ray Spectrometer (C1XS). The C1XS onboard the Chandrayaan-1 spacecraft was designed to map the surface ...
  • Multireference perturbation theory with improved virtualorbitals for radicals: More degeneracies, more problems 
    Ray, S. S; Manna, S; Ghosh, Anirban; Chaudhuri, R. K; Chattopadhyay, Sudip (WILEY-VCH Verlag GmbH & Co., 2019-02-15)
    IVO‐SSMRPT is an affordable and accurate type of state‐specific multireference perturbation (SSMRPT) theory that adds dynamic correlation energy to improved virtual orbital (IVO) complete active space configuration interaction ...
  • Molecular gas and star formation in void galaxies 
    Das, Mousumi; Saito, T; Iono, D; Honey, M; Ramya, S (International Astronomical Union, 2016-10)
    We present the detection of molecular gas using CO(1–0) line emission and followup Hα imaging observations of galaxies located in nearby voids. The CO(1–0) observations were done using the 45m telescope of the Nobeyama ...
  • Physical parameters and long-term photometric variability of V1481 Ori, an SB2 member of Orion nebula Cluster with an accreting component 
    Messina, S; Parihar, P. S; Biazzo, K; Lanza, A. F; Distefano, E; Melo, C. H. F; Bradstreet, D. H; Herbst, W (Oxford University Press on behalf of the Royal Astronomical Society, 2016-04)
    We present the results of our analysis on V1481 Ori (JW 239), a young SB2 in the Orion nebula Cluster with a circumbinary disc accreting on the lower mass component. The analysis is based on high-resolution spectroscopic ...
  • Permanent electric dipole moment of strontium monofluoride as a test of the accuracy of a relativistic coupled-cluster method 
    Srinivasa Prasannaa, V; Abe, M; Das, B. P (The American Physical Society, 2014-11)
    The permanent electric dipole moment of the X2Σ+ electronic ground state of the strontium monofluoride molecule is calculated using a relativistic coupled-cluster method. Our result is compared with those of other calculations ...
  • Characteristics of the solar coronal line profiles from Fabry-Perot interferometric observations 
    Maya Prabhakar; Raju, K. P; Chandrasekhar, T (Springer, 2019-03)
    This article reports the analysis of a set of Fabry–Perot interferograms that were studied to probe the physical parameters of the inner solar corona. The observations were carried out in the coronal green line, Fe XIV ...
  • Properties of small-scale magnetism of stellar atmospheres 
    Steiner, O; Salhab, R; Freytag, B; Rajaguru, S. P; Schaffenberger, W; Steffen, M (Published by Oxford University Press on behalf of the Astronomical Society of Japan, 2014-12)
    The magnetic field outside of sunspots is concentrated in the intergranular space, where it forms a delicate filigree of bright ribbons and dots as seen on broad band images of the Sun. We expect this small-scale magnetic ...
  • Variable stars in Palomar 13; an evaporating globular cluster 
    Yepez, M. A; Ferro, A. A; Schoeder, K. P; Muneer, S; Giridhar, S; Allen, C (Elsevier B.V, 2019-08)
    We present new CCD VI photometry of the distant globular cluster Pal 13. Fourier decomposition of the light curves of the three cluster member RRab stars lead to estimations of [Fe/H] = −1.65, and a distance of 23.67 ± ...
  • GMRT H I study of giant low surface brightness galaxies 
    Mishra, A; Kantharia, N. G; Das, Mousumi; Omar, A; Srivastava, D. C (Oxford University Press on behalf of the Royal Astronomical Society, 2017-01)
    We present H I observations of four giant low surface brightness (GLSB) galaxies UGC 1378, UGC 1922, UGC 4422 and UM 163 using the Giant Meterwave Radio Telescope. We include H I results on UGC 2936, UGC 6614 and Malin 2 ...
  • Multi-dimensional polarized radiative transfer: methods and solar applications 
    Anusha, L. S; Nagendra, K. N (Astronomical Society of the Pacific, 2014-10)
    Observations of the Sun using modern telescopes as well as numerical simulations of the Sun reveal existence of enormous inhomogeneous structures in the solar atmosphere. The polarized spectrum of the Sun (Second Solar ...
  • Chemical analysis of a carbon-enhanced very metal-poor star: CD-27 14351 
    Drisya, K; Goswami, A; Masseron, T (IOP Publishing, 2017-01-01)
    We present, for the first time, an abundance analysis of a very metal-poor carbon-enhanced star CD-27 14351 based on a high-resolution (R ~ 48,000) FEROS spectrum. Our abundance analysis performed using local thermodynamic ...
  • Triggering The Birth of New Cycle’s Sunspots by Solar Tsunami 
    Dikpati, M; McIntosh, S.W; Chatterjee, Subhamoy; Banerjee, D; Yellin-Bergovoy, Ron; Srivastava, A (Springer Nature, 2019-02-14)
    When will a new cycle’s sunspots appear? We demonstrate a novel physical mechanism, namely, that a “solar tsunami” occurring in the Sun’s interior shear-fluid layer can trigger new cycle’s magnetic flux emergence at high ...
  • The distribution and kinematics of interstellar O VI in the milky way 
    Sarma, R; Pathak, A; Murthy, J; Sarma, J. K (Oxford University Press on behalf of the Royal Astronomical Society, 2017-02)
    We present the results of a survey of interstellar O VI absorption in the Milky Way (MW) towards 69 stars in the Large Magellanic Cloud obtained with the Far Ultraviolet Spectroscopic Explorer (FUSE). The integrated MW ...
  • Polarized line formation with angle-dependent partial frequency redistribution 
    Sampoorna, M (Astronomical Society of the Pacific, 2014-10)
    The linear polarization of spectral lines seen in the solar limb observations is created by the scattering of the anisotropic radiation field by atoms and molecules. The partial frequency redistribution (PRD) effects in ...
  • Signature of extended solar cycles as detected from Ca ii K synoptic maps of Kodaikanal and Mount Wilson Observatory 
    Chatterjee, Subhamoy; Banerjee, D; McIntosh, S.W; Leamon, Robert J; Dikpati, Mausumi; Srivastava, Abhishek K; Bertello, L (IOP Publishing, 2019-03-20)
    In recent years there has been a resurgence of the study of extended solar cycles (ESCs) through observational proxies mainly in extreme ultraviolet. But most of them are limited only to the space-based era covering only ...
  • The evolution of the Milky Way: new insights from open clusters 
    Reddy, A. B. S; Lambert, D. L; Giridhar, S (Oxford University Press on behalf of the Royal Astronomical Society, 2016-12)
    We have collected high-dispersion echelle spectra of red giant members in the 12 open clusters (OCs) and derived stellar parameters and chemical abundances for 26 species by either line equivalent widths or synthetic ...
  • Modeling Repeatedly Flaring δ Sunspots 
    Chatterjee, Piyali; Hansteen, V; Carlsson, M (The American Physical Society, 2016-03)
    Active regions (ARs) appearing on the surface of the Sun are classified into α , β , γ , and δ by the rules of the Mount Wilson Observatory, California on the basis of their topological complexity. Amongst these, the δ ...

Search DSpace


Browse

My Account