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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 ...

An assessment of far-infrared measurements and their processing

Ghosh, S. K; Das, B; Rengarajan, T. N; Verma, R. P (Astronomical Society of India, 1993)

Three image processing schemes, used for generating far-infrared (FIR) astronomical maps have been compared for their relative merits. Two of these schemes based on the maximum entropy method (MEM) have been developed at ...

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 Coronal holes with large scale Solar Magnetic fields

Shelke, R. N; Pande, M. C (Astronomical Society of India, 1984-12)

Association of coronal holes with large scale solar magnetic fields has been investigated. It is concluded that coronal holes always form in the large unipolar megnetic field patterns, and no specific polarity rule holds ...

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 solar flares with twisting of magnetic neutral lines

Uddin, W; Pande, M. C; Shelke, R. N (Astronomical Society of Indian, 1986-06)

A 'twisting index' is defined, assuming that flares tend to occur in highly sheared magnetic fields which also lead to a twisting of magnetic neutral lines in complex active regions. The correlation of this twisting index ...

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 ...

Asteroid named after B'luru astrophysicist Jayant Murthy

The Deccan Herald (The Deccan Herald, 2024-03-23)

Asteroid named after city researcher

The Hindu (The Hindu, 2024-03-23)

Asteroid named after Indian astrophysicist Jayant Murthy

The Times of India (The Times of India, 2024-03-23)

Asteroid number 229 "Adelinda" photographed with the Kavalur Schmidt

Deccan Herald (Deccan Herald, 1988-03-19)

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 ...

Asteroseismological calibration of open clusters

Audard, N; Brown, T. M; Christensen-Dalsgaard, J; Frandsen, S; Kjeldsen, H (Astronomical Society of India, 1996)

Combining classical and seismological data permits one to perform a calibration of stars, and therefore to improve the estimate of their fundamental parameters. We present preliminary results of the calibration of stars ...

Asteroseismology of white dwarf stars with medium size telescopes

Marar, T. M. K; Seetha, S; Ashoka, B. N (Astronomical Society of India, 1998)

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), ...

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