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Browsing IIAP Publications by Title

Browsing IIAP Publications by Title

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  • Sahoo, B. K; Das, B. P (American Physical Society, 2011-07)
    We consider parity nonconservation (PNC) in singly ionized ytterbium (Yb+) arising from the neutral current weak interaction. We calculate the PNC electric dipole transition amplitude (E1PNC) and the properties associated ...
  • Kharb, P; Shastri, P (International Astronomical Union, 2001)
    A majority of a complete sample of 3CR FR I radio galaxies show unresolved optical nuclear sources on the scales of 0.1 arcsec. These Compact Central Cores (CCC) have been interpreted as the optical counterparts of the ...
  • Mohan, P; An, T; Frey, S; Mangalam, A; Gabanyi, K. E; Kun, E (Oxford University Press on behalf of the Royal Astronomical Society, 2016-12-01)
    The quasar PG 1302−102 is believed to harbour a supermassive binary black hole (SMBBH) system. Using the available 15 GHz and 2–8 GHz, multi-epoch Very Long Baseline Array data, we constrain the pc-scale jet properties ...
  • Kharb, P; Gabuzda, D; Shastri, P (Blackwell Publishing, 2008-02)
    We present very long baseline interferometry polarization images of an X-ray-selected sample of BL Lacertae objects belonging to the first HEAO-1 and the ROSAT–Green Bank (RGB) surveys. These are primarily high-energy-peaked ...
  • Lal, D. V; Shastri, P; Gabuzda, D. C (The Astronomical Society of the Pacific, 2001)
  • Nagendra, K. N (Springer, 1996-03)
    Velocity fields in line formation regions strongly affect the line polarization. The conventionally used observer's frame method of solving the polarized transfer equation becomes expensive and inaccurate for partial ...
  • Nagendra, K. N (Astronomical Society of the Pacific, 2014-10)
    In this review we first describe briefly the techniques to formulate partial redistribution (PRD) matrices for polarized line scattering on atoms. These matrices have to be formulated by either semi-classical or quantum ...
  • Vahia, M. N (Indian Institute of Astrophysics, Bangalore, 1988)
    Recent results on various aspects of solar energetic particles are reviewed. A possible grain component of the polar particles is discussed in brief. The plasma component namely the solar wind and the solar energetic ...
  • de Sabbata, V; Sivaram, C (Springer, 1990-10)
    We discuss the Kaluza-Klein theory in the strong-gravity framework: this leads naturally to the values of the elementary-particle magnetic moments showing also that the spin of the particle, through torsion, plays a more ...
  • Naik, Suvedha Suresh; Furuuchi, Kazuyuki; Pravabati, C (IOP Publishing, 2022-07)
    A class of inflationary models that involve rapid bursts of particle productions predict observational signatures, such as bump-like features in the primordial scalar power spectrum. In this work, we analyze such models ...
  • Naik, Suvedha Suresh; Pravabati, C; Furuuchi, Kazuyuki (IOP Publishing, 2023-04)
    We examine a type of feature in the primordial scalar power spectrum, namely, the bump-like feature(s) that arise as a result of burst(s) of particle production during inflation. The latest CMB observations by Planck ...
  • Sharma, A; Ramanna, R (World Scientific Publishing Company, 1996-09)
    In this letter it is shown that there is a close connection between the isospins of the fundamental particles and their masses and lifetimes. One of the important results is that the lifetime of the proton comes out to be ...
  • Sastri, J. H (European Geosciences Union, 1985-10)
    From a statistical analysis of ionogram data of Kodaikanal (dip 3.5 deg N) it is shown that, during years of high sunspot activity, the discontinuous or patchy occurrence of equatorial spread-F (ESF) depends on season. ...
  • Kharb, P; Shastri, P; Gabuzda, D. C (Elsevier, 2003-10)
    We study two aspects of the differences between Active Galactic Nuclei (AGN) of the two Fanaroff-Riley types in order to investigate the causes of the F-R divide. We: (a) contrast the properties of the optical cores in ...
  • Ananth, A. V; Srinivasan, R; Srinivasulu, G (Council of Scientific and Industrial Research, 1991-08)
  • Sagar, R; Srinivasan, R (Tata Institute of Fundamental Research, 1988)
  • Suryanarayana, G. S; Balakrishna, K. M (IOP Publishing, 2017-01)
    Features of flares that occur in association with coronal mass ejections (CMEs) have often displayed variations compared to flares with no associated CMEs. A comparative estimation of peak flux values of flares associated ...
  • Vahia, M. N (Indian Institute of Astrophysics, Bangalore, 1988)
    In this paper we attempt to show that currently available data on solar flare particle abundances allows studies of abundance and enchancement patterns. In particular we show that solar particles originate from regions of ...
  • Goswami, P. P; Goswami, A (EDP Sciences, 2022-01)
    Context. Understanding the surface chemical composition of carbon-enhanced metal-poor (CEMP) stars with enhanced abundances of heavy elements remains problematic. Aims. One of the primary objectives is to investigate the ...
  • Gupta, A. C; Mangalam, A; Wiita, J. Paul; Kushwaha, P; Gaur, H; Zhang, H; Gu, M. F; Liao, M; Dewangan, G. C; Ho, L. C; Mohan, P; Umeura, M; Sasada, M; Volvach, A. E; Agarwal, A; Aller, M. F; Aller, H. D; Bachev, R; Lahteenmaki, A; Semkov, E; Strigachev, A; Tornikoski, M; Volvach, L. N (Oxford University Press on behalf of the Royal Astronomical Society, 2017-11)
    The blazar 3C 454.3 exhibited a strong flare seen in γ -rays, X-rays and optical/near-infrared bands during 2009 December 3–12. Emission in the V and J bands rose more gradually than did the γ -rays and soft X-rays, ...

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