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Browsing IIAP Publications by Title

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  • ARIES ST Radar: The First Central Himalayan Wind Profiler 
    Bhattacharjee, Samaresh; Naja, Manish; Jaiswal, Aditya; Rawat, Kishan Singh; Sagar, Ram; Ananthakrishnan, S (World Scientific Publishing Company, 2022-12)
    Recently, a 206.5MHz Stratosphere Troposphere (ST) Radar system was successfully installed and made operationalized at Aryabhatta Research Institute of Observational Sciences (ARIES) (29.4N, 79.2E, 1793m amsl), Nainital, ...
  • ARIES, Nainital: a strategically important location for climate change studies in the Central Gangetic Himalayan region 
    Sagar, R; Dumka, U. C; Naja, M; Singh, N; Phanikumar, D. V (Indian Academy of Sciences, 2015-08-25)
    ARIES, acronym for Aryabhatta Research Institute of Observational Sciences, located in the Central Gangetic Himalayan (CGH) region is emerging as one of the unique sites for climate change studies. The long-term, in situ, ...
  • Arp 202: a TDG formed in a parent's extended dark matter halo? 
    Scott, T. C; Lagos, P; Ramya, S; Sengupta, C; Paudel, S; Sahu, D. K; Misra, K; Woo, J. H; Sohn, B .W (Oxford University Press on behalf of the Royal Astronomical Society, 2018-03)
    We report on H α + [N II] imaging of the Arp 202 interacting pair and its tidal dwarf galaxy (TDG) candidate as well as a GMOS long slit spectrum from the TDG candidate, observed with the Gemini North telescope. Our H α + ...
  • ASASSN-14dq: A fast-declining type II-P Supernova in a low-luminosity host galaxy 
    Singh, A; Srivastav, S; Brajesh Kumar; Anupama, G. C; Sahu, D. K (Oxford University Press on behalf of the Royal Astronomical Society, 2018-10)
    Optical broadband (UBVRI) photometric and low-resolution spectroscopic observations of the Type II-P supernova (SN) ASASSN-14dq are presented. ASASSN-14dq exploded in a low-luminosity/metallicity host galaxy UGC 11860, the ...
  • ASASSN-16fp (SN 2016coi): A Transitional Supernova between Type Ic And Broad-Lined Ic 
    Brajesh Kumar; Singh, A; Srivastav, S; Sahu, D. K; Anupama, G. C (Oxford University Press on behalf of the Royal Astronomical Society, 2018-01)
    We present results based on a well-sampled optical ( UBVRI ) and ultraviolet ( Swift /UVOT) imaging, and low-resolution optical spectroscopic follow-up observations of the nearby Type Ic supernova (SN) ASASSN-16fp ...
  • Aspects of Observational Astronomy in India: The Vidyasankara temple at Sringeri 
    Kameswara Rao, N; Thakur, Priya (Centre for Astronomy, James Cook University, 2011-07)
    The navaranga in the medieval stone temple of Vidyasankara at Sringeri, built around A.D. 1350, has twelve zodiacal pillars arranged in a square with the zodiacal signs carved on them. It has been claimed that the morning ...
  • ASPEN Workshop on Supernova Physics 
    Ramadurai, S (Indian Institute of Astrophysics, 1988)
  • An Aspheric Grin Ray Trace Program for Thermal Analysis of Optical Systems 
    Sharma, D. K; Shyam, D; Sujatha, G (Indian Institute of Astrophysics, Bangalore, 1991)
    In this communication we describe a program which can ray trace through systems bounded by spherical/ aspheric surfaces together with the option to trace through media having graded index profile (GRIN) for one or more ...
  • Assessing landslide susceptibility using Bayesian probability-based weight of evidence model 
    Sujatha, E. R; Kumaravel, P; Rajamanickam, V. G (Springer, 2014-02)
    This study aims to demonstrate the application of a Bayesian probability-based weight of evidence model to map landslide susceptibility in the Tevankarai stream watershed, Kodaikkanal, India. Slope gradient, relief, aspect, ...
  • Assessment of aerosol optical and micro-physical features retrieved from direct and diffuse solar irradiance measurements from Skyradiometer at a high altitude station at Merak 
    Shantikumar, N. S; Srivastava, A. K; Bagare, S. P; Singh, R. B; Kanawade, V. P; Dorjey, N (Springer, 2015-11)
    Optical and micro-physical features of aerosol are reported using Skyradiometer (POM-01L, Prede, Japan) observations taken from a high-altitude station Merak, located in north-eastern Ladakh of the western transHimalayas ...
  • Association between the number of flares in an active region and cumulative flux 
    Suryanarayana, G. S (Elsevier, 2022-07-01)
    Active region (AR) flux is released in the form of flares and Coronal Mass Ejections and a host of several other energetic events. The development of an AR is an indication of the accumulation of flux which reflects the ...
  • Association of calcium network bright points with underneath photospheric magnetic patches 
    Narang, Nancy; Banerjee, D; Chandrashekhar, K; Pant, V (Springer, 2019-04)
    Recent dedicated Hinode polar region campaigns revealed the presence of concentrated kilogauss patches of the magnetic field in the polar regions of the Sun, which are also shown to be correlated with facular bright points ...
  • Association of calcium network brightness with polar magnetic fields 
    Narang, Nancy; Chandrashekhar, K; Pant, V; Banerjee, D (Cambridge University Press, 2018-02)
    Recent dedicated HINODE polar region campaign revealed the presence of concentrated kilogauss patches of magnetic field in the polar regions of Sun which are also shown to be correlated with facular bright points at the ...
  • Association of Plages with Sunspots: A Multi-Wavelength Study Using Kodaikanal Ca ii K and Greenwich Sunspot Area Data 
    Mandal, Sudip; Chatterjee, Subhamoy; Banerjee, D (IOP Publishing, 2017-02-01)
    Plages are the magnetically active chromospheric structures prominently visible in the Ca ii K line (3933.67 Å). A plage may or may not be associated with a sunspot, which is a magnetic structure visible in the solar ...
  • Association of Supergranule Mean Scales with Solar Cycle Strengths and Total Solar Irradiance 
    Mandal, Sudip; Chatterjee, Subhamoy; Banerjee, D (IOP Publishing, 2018-09)
    We analyze the long-term behavior of the supergranule scale parameter, in active regions (ARs) and quiet regions (QRs), using the Kodaikanal digitized data archive. This database provides century-long daily full ...
  • The asteroseismic potential of Kepler: first results for solar-type stars 
    Chaplin, W. J; Appourchaux, T; Elsworth, Y; Garcia, R. A; Houdek, G; Karoff, C; Metcalfe, T. S; Molenda-Zakowicz, J; Monteiro, M. J. P. F. G; Thompson, M. J; Brown, T. M; Kiss, L. L; Kitiashvili, I. N; Kolenberg, K; Korhonen, H; Kosovichev, A. G; Kupka, F; Lebreton, Y; Leroy, B; Ludwig, H. G; Mathis, S; Michel, E; Miglio, A; Montalban, J; Moya, A; Noels, A; Noyes, R. W; Palle, P. L; Piau, L; Preston, H. L; Roca Cortes, T; Roth, M; Sato, K. H; Schmitt, J; Serenelli, A. M; Silva Aguirre, V; Stevens, I. R; Suarez, J. C; Suran, M. D; Trampedach, R; Turck-Chieze, S; Uytterhoeven, K; Ventura, R; Christensen-Dalsgaard, J; Gilliland, R. L; Kjeldsen, H; Borucki, W. J; Koch, D; Jenkins, J. M; Ballot, J; Basu, S; Bazot, M; Bedding, T. R; Benomar, O; Bonanno, A; Brandao, I. M; Bruntt, H; Campante, T. L; Creevey, O. L; Di Mauro, M. P; Dogan, G; Dreizler, S; Eggenberger, P; Esch, L; Fletcher, S. T; Frandsen, S; Gai, N; Gaulme, P; Handberg, R; Hekker, S; Howe, R; Huber, D; Korzennik, S. G; Lebrun, J. C; Leccia, S; Martic, M; Mathur, S; Mosser, B; New, R; Quirion, P. O; Regulo, C; Roxburgh, I. W; Salabert, D; Schou, J; Sousa, S. G; Stello, D; Verner, G. A; Arentoft, T; Barban, C; Belkacem, K; Benatti, S; Biazzo, K; Boumier, P; Bradley, P. A; Broomhall, A. M; Buzasi, D. L; Claudi, R. U; Cunha, M. S; D'Antona, F; Deheuvels, S; Derekas, A; Garcia Hernandez, A; Giampapa, M. S; Goupil, M. J; Gruberbauer, M; Guzik, J. A; Hale, S. J; Ireland, M. J (IOP Publishing, 2010-04)
    We present preliminary asteroseismic results from Kepler on three G-type stars. The observations, made at one-minute cadence during the first 33.5d of science operations, reveal high signal-to-noise solar-like oscillation ...
  • Asteroseismology Sheds Light on the Origin of Carbon-deficient Red Giants: Likely Merger Products and Linked to the Li-rich Giants 
    Maben, Sunayana; Campbel, Simon W; Bharat Kumar, Y; Reddy, B. E; Zhao, Gang (IOP Publishing, 2023-11-01)
    Carbon-deficient red giants (CDGs) are a peculiar class of stars that have eluded explanation for decades. We aim to better characterize CDGs by using asteroseismology (Kepler, TESS) combined with spectroscopy (APOGEE, LAMOST), ...
  • Astreaks: astrometry of NEOs with trailed background stars 
    Sharma, Kritti; Kumar, Harsh; Choudhary, Harsh; Bhalerao, Varun; Swain, Vishwajeet; Bolin, Bryce; Anupama, G. C; Barway, Sudhanshu; Joharle, Simran; Shenoy, Vedant (Oxford University Press on behalf of Royal Astronomical Society, 2023-09)
    The detection and accurate astrometry of fast-moving near-Earth objects (NEOs) has been a challenge for the follow-up community. Their fast apparent motion results in streaks in sidereal images, thus affecting the telescope’s ...
  • Astrometric results of observations of mutual occultations and eclipses of the Uranian satellites in 2007 
    Arlot, J.-E; Emelyanov, N. V; Aslan, Z; Assafin, M; Bel, J; Bhatt, B. C; Braga-Ribas, F; Camargo, J. I. B; Casas, R; Colas, F; Coliac, J. F; Dumas, C; Ellington, C. K; Forne, E; Frappa, E; Khamitov, I; Miller, C; Modic, R. J; Sahu, D. K; Sicardy, B; Tanga, P; Sada, P. V; Vasundhara, R; Vieira-Martins, R (EDP Sciences, 2013-09)
    Context. The photometry of mutual occultations and eclipses of natural planetary satellites can be used to infer very accurate astrometric data. This can be achieved by processing the light curves of the satellites observed ...
  • Astrometry from CCD photometry of mutual events of Jovian satellites from VBO during 1997 
    Vasundhara, R (EDP Sciences, 2002-07)
    Astrometric results of CCD observations of the mutual events of the Galilean satellites of Jupiter from the Vainu Bappu Observatory are presented. The shifts in the photo-centers on the disks of Io and Europa due to albedo ...

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