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Browsing IIAP Publications by Title

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  • Supernova SN 1987A - Rotation rate of the central pulsar 
    Bhatt, H. C; Datta, B (Royal Astronomical Society, 1989-04)
    Using available observational data on supernova SN 1987A, firm quantitative lower limits on the rotation period of the central pulsar (assuming the pulsar luminosity to power the supernova light curve) are derived. It is ...
  • Supernova SN 2012dn: a spectroscopic clone of SN 2006gz 
    Chakradhari, N. K; Sahu, D. K; Srivastav, S; Anupama, G. C (Oxford University Press on behalf of the Royal Astronomical Society, 2014-09-11)
    We present optical and UV analysis of the luminous Type Ia supernova SN 2012dn covering the period from ∼−11 to +109 d with respect to the B-band maximum, which occurred on JD 245 6132.89 ± 0.19, with an apparent magnitude ...
  • Supernovae and the AP Phenomenon 
    Rajamohan, R; Pati, A. K (International Astronomical Union, 1980)
  • Supernovae and the AP phenomenon 
    Rajamohan, R; Pati, A. K (Indian Academy of Sciences, 1980-12)
    We put forward evidence that relates the phenomenon of the chemically peculiar stars of the upper main sequence to Supernovae explosions in young clusters. In the Upper Scorpius region we find that a supernova shell has ...
  • Supernovae in early-type galaxies 
    Kochhar, R. K (Kluwer Academic Publishers, 1989-07)
    It is argued that all SNI come from short-lived stars and do not occur in a typical, isolationist, gas-free early-type galaxy. SNI occur only in those galaxies which accrete gas and form stars. SN properties of E/SOs are, ...
  • Supernovae study: Context of the 4-m International Liquid Mirror Telescope 
    Kumar, B; Pandey, S. B; Pandey, Kanhaiya L; Anapuma, G. C; Surdej, J (Societe Royale des Sciences de Liege, 2018-04)
    The upcoming 4-m International Liquid Mirror Telescope (ILMT) facility will perform deep imaging (in single scan g 0 ∼22 mag) of a narrow strip of sky each clear night in the Time Delayed Integration mode. A cadence of ...
  • Supersolid and solitonic phases in one-dimensional extended Bose-Hubbard model 
    Mishra, T; Pai, R. V; Ramanan, S; Luthra, M. S; Das, B. P (The American Physical Society, 2009-10)
    We report our findings on quantum phase transitions in cold bosonic atoms in a one dimensional optical lattice using the finite size density matrix renormalization group method in the framework of the extended Bose-Hubbard ...
  • Supersonic cloud collision. I 
    Anathpindika, S (EDP Sciences, 2009-09)
    It has long been suggested that shocks might play an important role in altering the form of the interstellar medium (ISM). Shocks enhance gas density and sufficiently dense regions may become self gravitating. Potential ...
  • Supersonic cloud collision. II 
    Anathpindika, S (EDP Sciences, 2009-09)
    Aims. In this second paper of the sequel of two papers, we continue to investigate the problem of molecular cloud (MC) collision. The companion paper to this one considered highly supersonic cloud collisions and examined ...
  • Surface compositions of R coronae borealis stars and extreme helium stars - some connections 
    Kameswara Rao, N (Astronomical Society of the Pacific, 2005-09)
    Abundances of R Coronae Borealis stars (RCBs) and Extreme Helium stars (EHes) are discussed. Recent estimates of the s-process elements in hot extreme helium stars show enhancements of lighter s-process elements (Y, Zr) ...
  • Survey for Li-rich K giants 
    Bharat Kumar, Y; Reddy, B. E (Cambridge University Press, 2010-04)
    We present results from an ongoing survey of searching Li-rich K giants among low mass giants along the Red Giant Branch (RGB). A sample of 2500 stars with accurate astrometry have been selected from Hipparcos catalogue ...
  • Survey of Li-rich giants among Kepler and LAMOST fields: determination of Li-rich giants' evolutionary phase 
    Raghubar Singh; Reddy, B. E; Bharat Kumar, Y; Antia, H. M (IOP Publishing, 2019-06-10)
    In this Letter, we report the discovery of 24 new super Li-rich (A(Li) ≥ 3.2) giants of He-core burning phase at the red clump region. Results are based on a systematic search of a large sample of about 12,500 giants common ...
  • Survey of O VI absorption in the Large Magellanic Cloud 
    Pathak, A; Pradhan, A. C; Sujatha, N. V; Murthy, J (Wiley-Blackwell, 2011-04)
    We present a survey of interstellar O VI absorption in the Large Magellanic Cloud (LMC) towards 70 lines of sight based on Far Ultraviolet Spectroscopic Explorer (FUSE) observations. The survey covers O VI absorption in a ...
  • A survey of red stars in the direction of the Large Magellanic Cloud. 2. Some regions around the bar. 
    Bappu, M. K. V; Parthasarathy, M; Scaria, K. K (Indian Institute of Astrophysics, 1978)
    We have continued the survey for red stars in the direction of the large Magellanic Cloud using the technique of ultra-low dispersion spectroscopy. This paper which is the second one on the series lists 706 stars located ...
  • A Survey of Red Stars in the Direction of the Large Magellanic Cloud. III. Some Regions North of Bar 
    Bappu, M. K. V; Parthasarathy, M; Scaria, K. K (Indian Institute of Astrophysics, Bangalore, 1985-11)
    We have continued the survey for red stars in the direction of the Large Magellanic Cloud using the technique of ultra-low dispersion spectroscopy. In this paper we list 310 red stars located north of L M C bar. Finding ...
  • A Survey of Red Stars in the Direction of the Large Magellanic Cloud: The 30 Doradus Region 
    Bappu, M. K. V; Parthasarathy, M; Scaria, K. K (Indian Institute of Astrophysics, Bangalore, 1977)
    We have commenced a survey of red stars in the direction of the Large Magellanic Cloud using the technique of ultra-low dispersion spectroscopy. This first paper is a listing of the red stars in the 30 Doradus region for ...
  • Survivability of cosmological quark nuggets in the chromoelectric flux-tube fission model of baryon evaporation 
    Bhattacharjee, P; Alam, J. E; Sinha, B; Raha, S (The American Physical Society, 1993-11-15)
    The question of the survivability of quark nuggets against the process of baryon evaporation from their surfaces is studied within the context of a dynamical model, namely, the chromoelectric flux-tube fission model of ...
  • Survival of Population III stars 
    Dutta, Jayanta; Sur, Sharanya; Stacy, Athena; Bagla, Jasjeet Singh (Cambridge University Press, 2018-05)
    In our earlier studyDutta (2016a), it has been shown that a number of primordial protostars (the ‘first stars’ in the Universe, also known as Population III or Pop III stars) are being ejected from the cluster of their ...
  • Suzaku X-ray spectral study of the Compton-thick Seyfert galaxy NGC 5135 
    Singh, V; Risaliti, G; Braito, V; Shastri, P (Wiley-Blackwell, 2012-01)
    We present the 0.5–50 keV Suzaku broad-band X-ray spectral study of the Compton-thick active galactic nucleus (AGN) in NGC 5135. The Suzaku observation provides the first detection of NGC 5135 above 10 keV that allowed us, ...
  • SWASTi-CME: A Physics-based Model to Study Coronal Mass Ejection Evolution and Its Interaction with Solar Wind 
    Mayank, Prateek; Vaidya, Bhargav; Mishra, Wageesh; Chakrabarty, D (American Astronomical Society, 2024-01)
    Coronal mass ejections (CMEs) are primary drivers of space weather, and studying their evolution in the inner heliosphere is vital to prepare for a timely response. Solar wind streams, acting as background, influence their ...

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