IIA Institutional Repository

Browsing IIAP Publications by Title

Browsing IIAP Publications by Title

Sort by: Order: Results:

  • Champagne flow and triggered star formation in NGC 1893 
    Maheswar, G; Sharma, S; Biman, J. M; Pandey, A. K; Bhatt, H. C (Blackwell Synergy, 2007-08)
    Using Hα grism spectroscopy and optical and Two-Micron All-Sky Survey photometry of the fields containing NGC 1893 and two emission nebulae, Sim 129 and Sim 130, we show the presence of a number of Hα and near-infrared ...
  • Chandra–Eddington episode 
    Sivaram, C (Indian Academy of Sciences, 2006-01)
  • Change of rotation rates of sunspot groups during their lifetimes: Clues to the sites of origin of different flux tubes 
    Hiremath, K. M (E D P Sciences, 2002-05)
    From 103 years of data of non-recurrent sunspot groups and for the two sets (area <100 millionths of hemisphere and >100 millionths of hemisphere), irrespective of their life span, we compute rotation rates and rate of ...
  • Changes in Photospheric Lorentz Force in Eruptive and Confined Solar Flares 
    Maity, Samriddhi Sankar; Sarkar, Ranadeep; Chatterjee, Piyali; Srivastava, Nandita (American Astronomical Society, 2024-02-10)
    Solar flares are known to leave imprints on the magnetic field in the photosphere, often manifested as an abrupt and permanent change in the downward-directed Lorentz force in localized areas inside the active region. Our ...
  • Changes of atmospheric electric potential gradient at Poona during disturbed weather 
    Sivaramakrishnan, M. V (The Manager Government of India Press, Simla, 1953-01)
    A detailed study of the changes of atmospheric potential gradient during disturbed weather at Poona for 5 years 1936-40 has been made. From the analysis it is seen that if during rainfall the potential gradient is negative ...
  • The changing interstellar medium of massive elliptical galaxies and cosmic evolution of radio galaxies and quasars 
    Mangalam, A; Gopal-Krishna; Wiita, Paul J (Blackwell Publishing, 2009-06-03)
    The recently discovered apparent dramatic expansion in the effective radii of massive elliptical galaxies from z≃ 2 to ≃0.1 has been interpreted in terms of either galaxy mergers or the rapid loss of cold gas due to ...
  • Changing look AGN Mrk 590: broad-line region and black hole mass from photometric reverberation mapping 
    Amit Kumar Mandal; Schramm, Malte; Rakshit, Suvendu; Stalin, C. S; Vijarnwannaluk, Bovornpratch; Rujopakarn, Wiphu; Poshyachinda, Saran; Kouprianov, Vladimir V; Haislip, Joshua B; Reichar, Daniel E; Sagar, R; Mathew, Blesson (Oxford University Press on behalf of Royal Astronomical Society, 2021-12)
    We present the results of photometric reverberation mapping observations on the changing look active galactic nucleus Mrk 590 at z = 0.026. The observations were carried out from 2018 July to December using broad-band B-, ...
  • Changing molecular gas properties in the bar and center of NGC 7479 
    Hüttemeister, S; Aalto, S; Das, M; Wall, W. F (European Southern Observatory, 2000-11)
    We present sensitive interferometric 12/supCO, 13/supCO and HCN observations of the barred spiral galaxy NGC 7479, one of the few barred galaxies known to have a continuous gas-filled bar. We focus on the investigation and ...
  • Chaos and Regularity in Adaptive Lattice Dynamics 
    Sinha, S (World Scientific Publishing Company, 1995-04)
    We describe the rich spectrum of spatio-temporal phenomena emerging from a class of models incorporating adaptive dynamics on a lattice of nonlinear (typically chaotic) elements. The investigation is based on extensive ...
  • Characteristics of damping of the pulses in the sun 
    Das, G. C (D.Reidel Publishing Co.,, 1981-06)
    Mathematical modelling is used in determining the rotational frequency and the density of an ionized medium. It is noted that the technique derives from the measurement of the group travel time for a wave propagating in a ...
  • Characteristics of night sporadic-E at Kodaikanal 
    Sastri, J. H; Murthy, B. S (National Institute of Science Communication And Information Resources, 1975-09)
    Published ionospheric data were used as a basis to study the characteristics of nighttime Es (blanketing frequency, virtual height, and transparency range) at Kodaikanal (geomag. lat.: 0.6 N; dip: 3.5 N) with the object ...
  • Characteristics of Polar Coronal Hole Jets 
    Chandrashekhar, K; Bemporad, A; Banerjee, D; Gupta, G. R; Teriaca, L (EDP Sciences, 2014-01)
    Context. High spatial- and temporal-resolution images of coronal hole regions show a dynamical environment where mass flows and jets are frequently observed. These jets are believed to be important for the coronal heating ...
  • Characteristics of synchrotron Čerenkov radiation 
    Pratap, R; Sasidharan, K; Krishan, V (The American physical Society, 1993-01)
    A diagrammatic technique has been worked out in the framework of nonequilibrium statistical mechanics as developed by Prigogine and co-workers to tackle the problem of radiation emission from a relativistic electron in an ...
  • Characteristics of the equatorial midnight temperature maximum in the Indian sector 
    Rao, H. N. R; Sastri, J. H (INIST-CNRS, 1994-04)
    We present the first results on the characteristics of the equatorial midnight temperature maximum (MTM) for the Indian sector. The results are based on measurements of the Doppler width of 630 nm night airglow emission ...
  • 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 ...
  • Characteristics of the solar wind at 1 a.u. in relation to Hale sector boundaries 
    Sastri, J. H (Elsevier, 1986-09)
    A study is made of the solar wind characteristics at 1 a.u. in the vicinity of Hale and anti-Hale sector boundaries (SBs), after isolating the SBs with solar activity related temporal flows and/or transient interplanetary ...
  • Characterization of adaptive optics mirrors using long yrace profilometer 
    Saxena, A. K; Chinnappan, V; Ismail Jabilullah, R (Anita Publications, 2004-12)
    A Long Trace Profilometer (LTP) was designed and fabricated in-house primarily to measure the profile of long, non-circularly symmetric grazing incidence optics. This system was used to calibrate the tip-tilt and deformable ...
  • Characterization of aerosol optical properties over the high-altitude station Hanle, in the trans-Himalayan region 
    Shantikumar, N. S; Bagare, S. P; Sinha, N; Rajendra, B. S; Srivastava, A. K; Larson, E; Kanawade, V. P (Elsevier B.V, 2014-03-01)
    Optical properties of aerosols over Hanle (4500 m amsl) in the western Himalayas were studied using skyradiometer observations during October 2007 to December 2010. Yearly mean value of aerosol optical depth (AOD) at 500 ...
  • Characterization of hot populations of Melotte 66 open cluster using Swift/UVOT 
    Rao, Khushboo K; Vaidya, Kaushar; Agarwal, Manan; Panthi, Anju; Jadhav, Vikrant V (Oxford University Press on behalf of Royal Astronomical Society, 2022-10)
    Ultraviolet (UV) wavelength observations have made a significant contribution to our understanding of hot stellar populations of star clusters. Multiwavelength spectral energy distributions (SEDs) of stars, including ...
  • Characterization of sites for Indian large optical telescope project 
    Parihar, P. S; Sharma, T. K; Surendran, A; Kemkar, P. M. M; Dadul; Stanzin, U; Anupama, G. C (IOP Publishing, 2015-04)
    Growing Indian astronomical community require access to large observing facility preferably located within the country. Site surveys carried out in the post indicates that the best sites for optical-NIR astronomy can better ...

Search DSpace


Browse

My Account