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Browsing IIAP Publications by Title

Browsing IIAP Publications by Title

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  • Strong-CP question in SU(3)c×SU(3)L×U(1)N models 
    Palash, B. Pal (The American Physical Society, 1995-08)
    We analyze two recent models based on the gauge group SU(3)c×SU(3)L×U(1)N where each generation is not anomaly-free but the anomaly cancels when three generations are taken into account. We show that the most general Yukawa ...
  • Structural analysis of star-forming blue early-type galaxies Merger-driven star formation in elliptical galaxies 
    George, K (EDP Sciences, 2017-02)
    Context. Star-forming blue early-type galaxies at low redshift can give insight to the stellar mass growth of L⋆ elliptical galaxies in the local Universe. Aims. We wish to understand the reason for star formation in ...
  • The structure and characteristic scales of the H I gas in galactic disks 
    Dib, Sami; Braine, Jonathan; Maheswar, G; Lara-López, Maritza A; Kravtsov, Valery V; Archana Soam; Sharma, Ekta; Zhukovska, Svitlana; Aouad, Charles; Belinchón, José Antonio; Helou, George; Li, Di (EDP Sciences, 2021-11)
    The spatial distribution of the H I gas in galactic disks holds important clues about the physical processes that shape the structure and dynamics of the interstellar medium (ISM). The structure of the ISM could be affected ...
  • Structure and Dynamics of the Solar Wind 
    Vats, Hari Om (Indian Institute of Astrophysics, Bangalore, 1986)
    Due to high temperature and very small temperature gradient with height, the solar corona is not in hydrostatic equilibrium but is continuously expanding into the inter-planetary space. The expanding coronal plasma is known ...
  • Structure and variability in the corona of the ultrafast rotator LO Pegasi 
    Lalitha, S; Schmitt, J. H. M. M; Singh, K. P (EDP Sciences, 2017-07)
    Context. Low-mass ultrafast rotators show the typical signatures of magnetic activity and are known to produce flares, probably as a result of magnetic reconnection. As a consequence, the coronae of these stars exhibit ...
  • The structure of the Cygnus Loop at 34.5 MHz 
    Sastry, Ch. V; Shevgaonkar, R. K; Dwarakanath, K. S (Indian Academy of Sciences, 1981-09)
    The large supernova remnant Cygnus Loop was observed at 34.5 MHz with a low-frequency radio telescope at Gauribidanur, India. The structure of the object is presented on a radio map with a resolution of 26 arcmin x 40 ...
  • Structure of the Large Magellanic Cloud from near infrared magnitudes of red clump stars 
    Subramanian, S; Subramaniam, A (EDP Sciences, 2013-04)
    Context. The structural parameters of the disk of the Large Magellanic Cloud (LMC) are estimated. Aims. We used the JH photometric data of red clump (RC) stars from the Magellanic Cloud Point Source Catalog (MCPSC) ...
  • Structure of the Solar Corona 
    Krishan, V (Indian Institute of Astrophysics, Bangalore, 1988)
    Solar eclipses established the existence of the outer region of the solar atmosphere, the solar corona, extending to several solar-radii and exhibiting open and closed magnetic field patterns. The density and the temperature ...
  • Structures in Saturn's Magnetosphere 
    Bhattacharyya, J. C (Indian Academy of Sciences, 1995-12)
  • Studies of a possible new Herbig Ae/Be star in the open cluster NGC 7380 
    Mathew, B; Banerjee, D. P. K; Ashok, N. M; Subramaniam, A; Bhavya, B; Joshi, V (Chinese Academy of Sciences, 2012-02)
    We present a study of the star 2MASS J22472238+5801214 with the aim of identifying its true nature which has hitherto been uncertain. This object, which is a member of the young cluster NGC 7380, has been variously proposed ...
  • Studies of diffuse UV radiation 
    Sujatha, N. V; Murthy, J (Astronomical Society of India, 2007-06)
    The upcoming TAUVEX mission is expected to provide us with high quality data from observations over large parts of the sky in different wavelength bands. We propose to use this data for the study of diffuse radiation field ...
  • Studies of synoptic solar activity using Kodaikanal Ca K data 
    Raju, K. P (International Astronomical Union, 2017-09)
    The chromospheric network, the bright emission network seen in the chromospheric lines such as Ca ii K and Hα , outline the supergranulation cells. The Ca images are dominated by the chromospheric network and plages which ...
  • Studies of waves in sunspots using spectropolarimetric observations 
    MacDonald, G. A; Rajaguru, S. P (Cambridge University Press, 2011-08)
    We observe the acoustic velocity oscillations in and near active region NOAA 10960 on 8 June, 2007 using observations from the IBIS instrument at the Dunn Solar Telescope at NSO/Sacramento Peak and simultaneous Hinode ...
  • Studies on E2 Transition in the Na-like Highly Stripped Ion Fe XVI 
    Ray, H (The American Astronomical Society, 2002-11)
    The spectrum of the solar corona and plasma spectra in astrophysical objects and fusion devices exhibit forbidden lines in alkali-like ions. Ions belonging to the iron group are particularly important in this respect. The ...
  • Studies on m-benzyne and phenol via improved virtual orbital-complete active space configuration interaction (IVO-CASCI) analytical gradient method 
    Chattopadhyay, S; Chaudhuri, R. K; Mahapatra, U. S (Elsevier, 2010-05)
    Improved virtual orbital-complete active space configuration interaction (IVO-CASCI) analytical gradient theory has been used to investigate geometrical parameters, vibrational frequencies and excitation energies of m-benzyne ...
  • Studies on the E2-transition in CoXVII 
    Ray, H (EDP Sciences, 2002-09)
    The spectrum of the solar corona, plasma spectra, astrophysical objects and fusion devices exhibit forbidden lines in alkali-like ions. Ions belonging to the iron group are particularly important in this respect. More ...
  • A study of 2175 Å absorption feature with TAUVEX: An Indo-Israeli UV mission 
    Muthumariappan, C; Maheswar, G; Eswaraiah, C; Pandey, A. K (International Astronomical Union, 2008-02)
    TAUVEX is an Indo-Israeli collaborative mission to make photometric observations in the UV region. Using the narrowband filters positioned near 2175 Å feature, we plan to construct the UV bump in the extinction curve towards ...
  • A study of a macro-spicule and a transition region explosive event in a solar coronal hole 
    Popescu, M. D; Xia, L. D; Banerjee, D; Doyle, J. G (Advances in Space Research, Vol. 40, Issue 7, pp. 1021 - 1025, 2007-02)
    Aims Spicules and the higher macro-spicules (jet-like structures seen at the solar limb) are believed to be the dominant mechanism for mass ejection in the higher solar atmosphere outside active regions. But what is the ...
  • A study of accretion discs around rapidly rotating neutron stars in general relativity and its applications to four low mass X-ray binaries 
    Bhattacharyya, S (E D P Sciences, 2002-02)
    We calculate the accretion disc temperature profiles, disc luminosities and boundary layer luminosities for rapidly rotating neutron stars considering the full effect of general relativity. We compare the theoretical values ...
  • Study of accretion flows around an ultraluminous X-ray source M82 X-1 using NuSTAR data 
    Mondal, Santanu; Palit, Biswaraj; Chakrabarti, Sandip K (Indian Academy of Sciences, 2022-12)
    We study the spectral properties and accretion flow behavior of an ultraluminous X-ray source M82 X-1 using NuSTAR observations. We use the physical two-component advective flow (TCAF) model to fit the data and to derive ...

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