IIA Institutional Repository

Browsing IIAP Publications by Title

Browsing IIAP Publications by Title

Sort by: Order: Results:

  • AutoTAB: Automatic Tracking Algorithm for Bipolar Magnetic Regions 
    Sreedevi, Anu; Jha, Bibhuti K; Karak, Bidya Binay; Banerjee, D (American Astronomical Society, 2023-10)
    Bipolar magnetic regions (BMRs) provide crucial information about solar magnetism. They exhibit varying morphology and magnetic properties throughout their lifetime, and studying these properties can provide valuable ...
  • Awakening of the high-redshift blazar CGRaBS J0809+5341 
    Paliya, Vaidehi S; Parker, M. L; Stalin, C. S; Fabian, A. C; Ramya, S; Covino, S; Tagliaferri, G; Sahayanathan, S; Ravikumar, C. D (IOP Publishing, 2015-04)
    CGRaBS J0809+5341, a high-redshift blazar at z = 2.144, underwent a giant optical outburst on 2014 April 19 when it brightened by ~5 mag and reached an unfiltered apparent magnitude of 15.7 mag. This implies an absolute ...
  • Axisymmetric MHD equilibrium of a self-gravitating incompressible fluid 
    Satya Narayanan, A (Royal Swedish Academy of Sciences, 1996-05)
    The equilibrium of a self-gravitating incompressible fluid with a magnetic field and large electrical conductivity is studied. The magnetic fields and fluid motions are assumed to have a symmetry about an axis. The basic ...
  • Azimuthal structures in the wind and chromosphere of the Herbig AE star AB Aurigae. Results from the MUSICOS 1992 campaign 
    Boehm, T; Catala, C; Donati, J. F; Welty, A; Baudrand, J; Butler, C. J; Carter, B; Collier-Cameron, A; Czarny, J; Foing, B; Ghosh, K; Hao, J; Houdebine, E; Huang, L; Jiang, S; Neff, J. E; Rees, D; Semel, M; Simon, T; Talavera, A; Zhai, D; Zhao, F (European Southern Observatory, 1996-12)
    The observations of the MUSICOS 1992 campaign concerned three scientific programs, among which was the study of azimuthal structures in the wind and chromosphere of the pre-main sequence Herbig Ae star AB Aur. The He I ...
  • B-fields in Star-forming Region Observations (BISTRO): Magnetic Fields in the Filamentary Structures of Serpens Main 
    Kwon, Woojin; Pattle, Kate; Sadavoy, Sarah; Hull, Charles L. H; Johnstone, Doug; Ward-Thompson, Derek; Francesco, James Di; Koch, Patrick M; Furuya, Ray; Doi, Yasuo; Le Gouellec, Valentin J. M; Hwang, Jihye; Lyo, A. -Ran; Archana Soam; & 138 Co-authors (American Astronomical Society, 2022-02-20)
    We present 850 μm polarimetric observations toward the Serpens Main molecular cloud obtained using the POL-2 polarimeter on the James Clerk Maxwell Telescope as part of the B-fields In STar-forming Region Observations ...
  • B-L cosmic strings and baryogenesis 
    Bhattacharjee, P; Sahu, N; Yajnik, U.A (American Physical Society, 2004-10)
    Cosmic strings arising from breaking of the $U(1)_{B-L}$ gauge symmetry that occurs in a wide variety of unified models can carry zero modes of heavy Majorana neutrinos. Decaying and/or repeatedly self-interacting closed ...
  • Ba+ quadrupole polarizabilities: theory versus experiment 
    Sahoo, B. K; Das, B. P (American Physical Society, 2012-08)
    Three different measurements have been reported for the ground-state quadrupole polarizability in singly ionized barium (Ba+) which disagree with each other. Our calculation of this quantity using the relativistic ...
  • Balloon UV experiments for astronomical and atmospheric observations 
    Sreejith, A. G; Mathew, J; Mayuresh, Sarpotdar; Nirmal, K; Ambily, S; Prakash, A; Safonova, M; Murthy, J (SPIE-The International Society for Optical Engineering, 2016-08)
    The ultraviolet (UV) window has been largely unexplored through balloons for astronomy. We discuss here the development of a compact near-UV spectrograph with fiber optics input for balloon flights. It is a modified ...
  • Band-limited integrated scatter measurements on super polished optical mirrors 
    Ventaka, S; Prasad, B. R; Natarajan, V; Kamath, P. U; Kathiravan, S (SPIE-The International Society for Optical Engineering, 2020-08)
    Scattering of light from a surface depends on its microroughness. In general, total integrated scattering of a surface is expressed in terms of root-mean-square microroughness (σrms) using empirical relations. These ...
  • Bar quenching: Evidence from star-formation-rate indicators 
    George, K; Subramanian, S (EDP Sciences, 2021-07)
    The central regions of star-forming barred spiral galaxies can be devoid of star formation because of the redistribution of gas along the length of the bar. However, there can be gas outside the length of the bar that can ...
  • Bar rejuvenation in S0 galaxies? 
    Barway, Sudhanshu; Saha, Kanak (Oxford University Press on behalf of the Royal Astronomical Society, 2020-07)
    Based on the colour measurements from a multiband, multicomponent 2D decompositions of S0 and spiral galaxies using SDSS images, we found that bars are bluer in S0 galaxies compared to the spiral galaxies. Most of the S0s ...
  • Baryogenesis via leptogenesis in presence of cosmic strings 
    Sahu, N; Bhattacharjee, P; Yajnik, U. A (Elsevier, 2006-09)
    We study the effect on leptogenesis due to B L cosmic strings of a U1 extension of the Standard Model. The disappearance of closed loops of B L cosmic strings can produce heavy right handed neutrinos, N's, whose CP-asymmetric ...
  • BD-18° 3437, a new short period eclipsing binary 
    Sanwal, N. B; Sarma, M. B. K; Parthasarathy, M; Abhyankar, K. D (European Southern Observatory, 1974-01)
  • Be phenomenon in open clusters: results from a survey of emission-line stars in young open clusters 
    Mathew, B; Subramaniam, A; Bhatt, B. C (The Royal Astronomical Society, 2008-08)
    Emission-line stars in young open clusters are identified to study their properties, as a function of age, spectral type and evolutionary state. 207 open star clusters were observed using the slitless spectroscopy method ...
  • Be phenomenon in open clusters: Results from a survey of emission-line stars in young open clusters 
    Mathew, B; Subramaniam, A; Bhatt, B. C (Institute de Astronomia, 2010-02)
    Emission-line stars in young open clusters are identified to study their properties, as a function of age, spectral type and evolutionary state. 207 open star clusters were observed using slitless spectroscopy method and ...
  • Be star disk structure as implied by X-ray observations 
    Saraswat, P; Apparao, K. M. V (International Astronomical Union, 1994)
  • Beginning of Activity in Long-period Comet C / 2015 ER61 ( PANSTARRS ) 
    Meech, K. J; Schambeau, C. A; Sorli, K; Kleyna, J; Micheli, M; Bauer, J; Denneau, L; Keane, J. V; Toller, E; Wainscoat, R; Hainaut, O; Bhatt, B. C; Sahu, D. K; Yang, B; Kramer, E; Magnier, G (IOP Publishing, 2017-05)
    We report the beginning of activity for comet C / 2015 ER61 ( PANSTARRS ) , the fi rst instance of watching a long- period comet turn on. Pre-discovery observations and observations from the NEOWISE space telescope ...
  • The behaviour of λ4686 line of He II in Wolf-Rayet binaries 
    Shylaja, B. S (International Astronomical Union, 1987)
    The binaries with subgroup WN components have been chosen, with periods ranging from 1.64 d to 21.63 d, for understanding the effect of the companion on the formation of this line.
  • Beobachtungen des Kometen 1910 a 
    Smith, C. M (Wiley, 1910-03)
  • Betti Numbers of Gaussian fields 
    Park, C; Pranav, P; Pravabati, C; Weygaert, R; Jones, B; Vegter, G; Kim, I; Hidding, J; Hellwing, W. A (The Korean Astronomical Society, 2013-06)
    We present the relation between the genus in cosmology and the Betti numbers for excursion sets of three- and two-dimensional smooth Gaussian random fields, and numerically investigate the Betti numbers as a function of ...

Search DSpace


Browse

My Account