IIA Institutional Repository

Browsing IIAP Publications by Title

Browsing IIAP Publications by Title

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  • A Study of blanketing sporadic E in the Indian Equatorial region 
    Bhargava, B. N; Subrahmanyan, R. V (Indian National Science Academy, 1964)
  • Study of bubble nebula using IUE high resolution spectra 
    Anand, M. Y; Kagali, B. A; Murthy, J (Astronomical Society of India, 2009-06)
    In this paper, we have analyzed IUE high resolution spectra of the central star (BD+602522) of the Bubble nebula. We discuss velocities of the different regions along the line of sight to the bubble. We find that the Bubble ...
  • Study of calcium-K network evolution from Antarctica 
    Singh, J; Nagabhushana, B. S; Babu, G. S. D; Uddin, Wahab (Springer, 1994-08)
    To study the evolution of large convective cells known as supergranules, a solar telescope was set up at Maitri, Indian permanent station in Antarctica region, during the local summer months (December 1989 through March ...
  • Study of candidate be stars in the magellanic clouds using near-infrared photometry and optical spectroscopy 
    Paul, K. T; Subramaniam, A; Mathew, B; Mennickent, R. E; Sabogal, B (Wiley-Blackwell, 2012-04)
    Mennickent et al. and Sabogal et al. identified a large number of classical Be (CBe) candidates (∼3500) in the Large and Small Magellanic Clouds (LMC and SMC) based on their photometric variability using the OGLE II data ...
  • Study of chemically peculiar stars - I. High-resolution spectroscopy and K2 photometry of Am stars in the region of M44 
    Joshi, Santosh; Trust, Otto; Semenko, E; Williams, P. E; Lampens, P; De Cat, P; Vermeylen, L; Holdsworth, D. L; García, R. A; Mathur, S; Santos, A. R. G; Mkrtichian, D; Goswami, A; Cuntz, M; Yadav, A. P; Sarkar, M; Bhatt, B. C; Kahraman Alicavus, F; Nhlapo, M. D; Lund, M. N; Goswami, P. P; Savanov, I; Jorissen, A; Jurua, E; Avvakumova, E; Dmitrienko, E. S; Chakradhari, N. K; Das, M. K; Chowdhury, S; Abedigamba, O. P; Yakunin, I; Letarte, B; Karinkuzhi, D (Oxford University Press on behalf of Royal Astronomical Society, 2022-03)
    We present a study based on the high-resolution spectroscopy and K2 space photometry of five chemically peculiar stars in the region of the open cluster M44. The analysis of the high-precision photometric K2 data reveals ...
  • Study of classical Be stars in open clusters older than 100 Myr 
    Jagadeesh, Madhu Kashyap; Blesson, Mathew; Paul, K. T; Banerjee, Gourav; Subramaniam, A; Arun, R (Springer, 2021-10)
    We performed the slitless spectroscopic survey to identify classical Be (CBe) stars in open clusters older than 100 Myr. Observing a sample of 71 open clusters, we identified 13 CBe stars in 11 open clusters, one of, ...
  • Study of Compton broadening due to electron-photo scattering 
    Srinivasa Rao, M (Astronomical Observatory, Serbia, 2010-06)
    SUMMARY: We have investigated the effects of Compton broadening due to electron-photon scattering in hot stellar atmospheres. A purely electron-photon scattering media is assumed to have plane parallel geometry with an ...
  • Study of core-collapse supernovae with the upcoming 4m international liquid mirror telescope at Devasthal, Nainital 
    Brajesh Kumar; Surdej, J; Hickson, P; Borra, E. F; Finet, F; Swings, J. P; Habraken, S; Pandey, S. B (Astronomical Society of India, 2015-03)
    We present an overview and status of the upcoming 4m International Liquid Mirror Telescope facility at Devasthal, Nainital and its uses for the study of core-collapse supernovae (CCSNe).
  • Study of correlation between optical flux and polarization variations in BL Lac objects 
    Rajput, Bhoomika; Pandey, Ashwani; Stalin, C. S; Mathew, Blesson (Oxford University Press on behalf of Royal Astronomical Society, 2022-12)
    Polarized radiation from blazars is one key piece of evidence for synchrotron radiation at low energy, which also shows variations. We present here our results on the correlation analysis between optical flux and polarization ...
  • Study of dust and ionized gas in early-type galaxies 
    Kulkarni, S; Sahu, D. K; Chaware, L; Chakradhari, N. K; Pandey, S. K (Elsevier B.V, 2014-07)
    We present results of optical broad-band and narrow-band Hα observations of a sample of forty nearby early-type galaxies. The majority of sample galaxies are known to have dust in various forms viz. dust lanes, nuclear ...
  • Study of dynamical status of the globular cluster NGC 1851 using ultraviolet imaging telescope 
    Singh, Gaurav; Yadav, R. K. S; Snehalata Sahu; Subramaniam, A (Indian Academy of Sciences, 2021-10)
    We present the study of dynamical status of the globular cluster NGC 1851. A combination of multi-wavelength space and ground-based data sets are used for the present analysis. In order to select the genuine cluster members, ...
  • Study of emission line stars in young open clusters 
    Mathew, B; Subramaniam, A (Astronomical Society of India, 2011)
    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 ...
  • Study of equilibrium geometries of diradicaloid systems via state specific multireference Moller-Plesset perturbation theory (SS-MRMPPT) 
    Chattopadhyay, S; Mahapatra, U. S; Chaudhuri, R. K (Elsevier, 2010-03)
    The numerical gradient scheme for rigorously size-extensive spin-free state-speci. c multireference Moller-Plesset perturbation theory based on Rayleigh-Schrdinger expansion (termed as SS-MRMPPT) has been employed for ...
  • Study of faint young open clusters as tracers of spiral features in our Galaxy 
    Babu, G. S. D (Indian Academy of Sciences, 1991-09)
    Continuing the study of faint young open clusters as tracers of spiral features in the Galaxy, photoelectric and photographic photometry of 39 stars was done in the field of the faint open cluster NGC 2236 = OCl 501 in the ...
  • A study of faint young open clusters as tracers of spiral features in our Galaxy. III - Collinder 97 (OCl 506) 
    Babu, G. S. D (Indian Academy of Sciences, 1987-09)
    Photoelectric and photographic photometry of twenty-nine stars was done in the field of the open cluster Collinder 97 ≡ OCl 506. Of these stars, a total of twenty-four have been found to be possible members. There is ...
  • A Study of Inner Solar Corona during Total Solar Eclipse of October 24, 1995 
    Saxena, A. K; Cowsik, R; Lancelot, J. P; Samson, J. P. A; Bagare, S. P; Ismail, R (Indian Institute of Astrophysics, Bangalore, 1997)
    To study the inner corona during the total solar eclipse of October 24, 1995, an experiment was setup at Kalpi, the second location of the two IIA camps. Continuous broad record at regular interval at 40ms (TV rate) using ...
  • Study of interstellar extinction in some young open clusters 
    Sagar, R (Royal Astronomical Society, 1987-09)
    Interstellar extinction has been studied in 15 open clusters, based on reliable cluster members and precise observational data. Out of these, 10 show nonuniform extinction across the cluster region. Most of these show ...
  • Study of isolated 1 : 1 AI+3.He complex using many-body perturbation theory: A multi-reference approach 
    Chattopadhyay, S; Mahapatra, U. S; Chaudhuri, R. K (Indian Association for the Cultivation of Science, 2007-10)
    Development and applications of many-body methods capable of reliable computation of potential energy curves (PEC) containing avoided curve-crossing zone remains a challenging area of activity in electronic structure theory ...
  • A study of K i 7699 Å and related shell lines during the recent eclipse of ϵ Aurigae 
    Muthumariappan, C; Parthasarathy, M; Leadbeater, R; Potravnov, I. S; Appakutty, M; Jayakumar, K (Oxford University Press on behalf of the Royal Astronomical Society, 2014-12-11)
    We report high-resolution (R = 30 000, 45 000 and 75 000) echelle and medium-resolution (R = 22 000 and 10 000) spectroscopic observations of the long-period, eclipsing binary ε Aurigae during the 2009 - 2011 eclipse. ...
  • Study of Lithium-rich giants with the GALAH spectroscopic survey 
    Deepak; Reddy, B. E (Oxford University Press on behalf of the Royal Astronomical Society, 2019-04)
    In this article, we speculate on the possible mechanisms for Li enhancement origin in RGB stars based on a large data set of around 340 299 stars collected from the GALAH survey combined with the Gaia astrometry. Data has ...

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