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Browsing IIAP Publications by Title

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  • Oscillations In Galaxies 
    Namboodiri, P. M. S (Springer, 2000-02)
    Oscillations in galaxies have been investigated by numerical simulations. The various models used have density distributions corresponding to that of polytrope of index n in the range 0 ≤ n ≤ 4 and their evolution has been ...
  • Oscillations In Galaxies 
    Namboodiri, P. M. S (Kluwer Academic Publishers, 2000-01)
    Oscillations in galaxies have been investigated by numerical simulations. The various models used have density distributions corresponding to that of polytrope of index n in the range 0 ≤ n ≤ 4 and their evolution has been ...
  • Oscillatory motions in intense flux tubes 
    Hasan, S. S (Royal Astronomical Society, 1986-03)
    The intricate nature of oscillatory motions in intene flux tubes is examined and states in which the ratio of gas to magnetic pressure (Beta) is constant are considered. Results are presented for both polytropic and real ...
  • Our Present Understanding of Solar Flares 
    Dwivedi, B. N (Indian Institute of Astrophysics, Bangalore, 1986)
    A general discussion of solar flares with emphasis on two-ribbon flares is given. The basic differences between compact (simple-loop) and two-ribbon flares have also been pointed. Skylab observations have been presented ...
  • The outburst and nature of young eruptive low mass stars in dark clouds 
    Ninan, J. P; Ojha, D. K; Bhatt, B. C; Mallick, K. K; Tej, A; Sahu, D. K; Ghosh, S. K; Mohan, V (Astronomical Society of India, 2012)
    The FU Orionis (FUor) or EX Orionis (EXor) phenomenon has attracted increasing attention in recent years and is now accepted as a crucial element in the early evolution of low-mass stars. FUor and EXor eruptions of young ...
  • Outbursts of Comet 67P/Churyumov-Gerasimenko 
    Sharma, Kritti; Kelley, Michael S. P; Joharle, Simran; Kumar, Harsh; Swain, Vishwajeet; Bhalerao, Varun; Anupama, G. C; Barway, Sudhanshu (IOP Publishing, 2021-12)
    We monitored the comet 67P/Churyumov-Gerasimenko close to its perihelion in November 2021 with the GROWTH-India Telescope. We observed two outbursts of this comet on 2021 October 29.940 and November 17.864 UTC, -3.12 days ...
  • Outer rings of Saturn 
    Bhattacharyya, J. C; Vasundhara, R (Indian Academy of Sciences, 1985)
    A two component model of a possible ring structure at about 12.5 Saturn radii is presented here which can explain the shapes of the immersion and emersion occultation profiles obtained during the occultation of SAO 158913 ...
  • Outgassing Behavior of C/2012 S1 (ISON) from 2011 September to 2013 June 
    Meech, K. J; Yang, B; Kleyna, J; Ansdell, M; Chiang, H. F; Hainaut, O; Vincent, J. B; Boehnhardt, H; Fitzsimmons, A; Rector, T; Riesen, T; Keane, J. V; Reipurth, B; Hsieh, H. H; Michaud, P; Milani, G; Bryssinck, E; Ligustri, R; Trabatti, R; Tozzi, G. P; Mottola, S; Kuehrt, E; Bhatt, B. C; Sahu, D. K; Lisse, C; Denneau, L; Jedicke, R; Magnier, E; Wainscoat, R (IOP Publishing, 2013-10-20)
    We report photometric observations for comet C/2012 S1 (ISON) obtained during the time period immediately after discovery (r = 6.28 AU) until it moved into solar conjunction in mid-2013 June using the UH2.2 m, and Gemini ...
  • Outlying Hα emitters in SDSS IV MaNGA 
    Bait, O; Wadadekar, Y; Barway, Sudhanshu (Oxford University Press on behalf of the Royal Astronomical Society, 2019-05)
    We have carried out a systematic search for outlying Hα emitters in the entire Data Release 14 of the Sloan Digital Sky Survey (SDSS) IV Mapping Nearby Galaxies at APO (MaNGA) survey. We have discovered six outlying Hα ...
  • An overview of and issues with sky radiometer technology and SKYNET 
    Nakajima, T; Campanelli, M; Che, Huizheng; Estelles, V; Irie, Hitoshi; Kim, Sang-Woo; Kim, Jhoon; Liu, Dong; Nishizawa, T; Pandithurai, Govindan; Soni, Vijay Kumar; Thana, Boossarasiri; Tugjsurn, Nas-Urt; Aoki, Kazuma; Sujung Go; Hashimoto, Makiko; Higurashi, Akiko; Kazadzis, Stelios; Khatri, Pradeep; Kouremeti, Natalia; Kudo, Rei; Marenco, Franco; Momoi, Masahiro; Shantikumar, N. S; Ryder, Claire L; Uchiyama, Akihiro; Yamazaki, Akihiro (European Geosciences Union, 2020-08)
    This paper is an overview of the progress in sky radiometer technology and the development of the network called SKYNET. It is found that the technology has produced useful on-site calibration methods, retrieval algorithms, ...
  • An overview of science results obtained from Kodaikanal digitized white-light data archive: 1921-2011 
    Mandal, Sudip; Banerjee, D (Cambridge University Press, 2018-02)
    In this proceeding, we present a summary of the recent scientific results that have been derived using the newly digitized whit-light (WL) data obtained from the Kodaikanal Solar Observatory.
  • An overview of some experimental and theoretical aspects of fundamental symmetry violations in atoms 
    Budker, D; Sahoo, B. K; Angom, D; Das, B. P (Indian Academy of Sciences, 2010-12)
    We present some of the advances in our experimental and theoretical studies of violations in fundamental symmetries in atoms. A part of this work was performed under the auspices of a NSF{DST project. During this period, ...
  • Overview of the DESI legacy imaging surveys 
    Arjun Dey; Schlegel, David J; Lang, Dustin; Blum, Robert; Kaylan Burleigh; Fan, Xiaohui; Findlay, Joseph R; Finkbeiner, Doug; Herrera, David; Juneau, Stephanie; Landriau, Martin; Levi, Michael; McGreer, Ian; Meisner, Aaron; Myers, Adam D; Moustakas, John; Nugent, Peter; Patej, Anna; Schlafly, Edward F; Walker, Alistair R; Valdes, Francisco; Weaver, Benjamin A; Yeche, Christophe; Zou, Hu; Zhou, Xu; Abaresh, Behzad; Abbott, T. M. C; Abolfathi, Bela; Aguilera, C; Alam, Shadab; Allen, Lori; Alvarez, A; Annis, James; Ansarinejad, Behzad; Aubert, Marie; Beechert, Jacqueline; Bell, Eric F; BenZvi, Segev Y; Beutler, Florian; Bielby, Richard M; Bolton, Adam S; Briceno, Cesar; Buckley-Geer, Elizabeth J; Butler, Karen; Calamida, Annalisa; Carlberg, Raymond G; Carter, Paul; Casas, Ricard; Castander, Francisco J; Choi, Yumi; Comparat, Johan; Cukanovaite, Elena; Delubac, Timothee; DeVries, Kaitlin; Dey, Sharmila; Dhungana, Govinda; Dickinson, Mark; Ding, Zhejie; Donaldson, John B; Duan, Yutong; Duckworth, Christopher J; Eftekharzadeh, Sarah; Eisenstein, Daniel J; Etourneau, Thomas; Fagrelius, Parker A; Farihi, Jay; Fitzpatrick, Mike; Font-Ribera, Andreu; Fulmer, Leah; Gansicke, Boris T; Gaztanaga, Enrique; George, K; and 89 co-authors (IOP Publishing, 2019-05)
    The DESI Legacy Imaging Surveys (http://legacysurvey.org/) are a combination of three public projects (the Dark Energy Camera Legacy Survey, the Beijing–Arizona Sky Survey, and the Mayall z-band Legacy Survey) that will ...
  • An overview of the proposed Indian spectroscopic and imaging space telescope 
    Subramaniam, A (Indian Academy of Sciences, 2022-12)
    India reached a major milestone in the area of space astronomy with the successful launch and postlaunch operations of its first space observatory, AstroSat. The success of this space observatory and the lessons learned ...
  • Overview of the Sun 
    Hasan, S. S (World Scientific, 2008)
  • Oxygen abundances of carbon-enhanced stellar population in the halo 
    Susmitha, A; Sivarani, T; Ojha, D. K; Ninan, Joe P; Bandyopadhyay, A; Surya, A; Athira, U (Springer, 2020-12)
    The large fraction of carbon-enhanced metal-poor (CEMP) stars at lower metallicities makes them an interesting class of objects to be probed further in greater detail. They show different abundance patterns of neutron-capture ...
  • Oxygen in the Sun's chromosphere 
    Royds, T (Government Observatory, Madras, 1935-08-29)
  • Oxygen isotopic ratios in cool R coronae borealis stars 
    Garcia-Hernandez, D. A; Lambert, D. L; Kameswara Rao, N; Hinkle, K. H; Eriksson, K (Institute of Physics, 2010-05)
    We investigate the relationship between R Coronae Borealis (RCB) stars and hydrogen-deficient carbon (HdC) stars by measuring precise 16O/18O ratios for five cool RCB stars. The 16O/18O ratios are derived by spectrum ...
  • P Cygni type profiles 
    Peraiah, A; Srinivasa Rao, M (Indian Institute of Astrophysics, Bangalore, 1985-11)
    We have presented a series of P Cygni type profiles of special lines computed by employing different velocity laws of expansion in a spherically atmosphere. A comparison has been made with those of Beals classification. ...
  • p-capture reaction cycles in rotating massive stars and their impact on elemental abundances in globular cluster stars: A case study of O, Na and Al 
    Mahanta, Upakul; Goswami, A; Duorah, H. L; Duorah, K (IOP Publishing, 2017-08)
    Elemental abundance patterns of globular cluster stars can provide important clues for understanding cluster formation and early chemical evolution. The origin of the abundance patterns, however, still remains poorly ...

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