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  • Astrophysical Significance of the Observations of Deuterons and Antiprotons in Cosmic Radiation 
    Stephens, S. A (Astronomical Society of India, 1978-06)
    A general survey of the different processes that lead to the production of deuterons and antiprotons in different regions of space and in cosmic rays is made. The avaiable observations on these particles are summarised and ...
  • Astrophysically relevant bound trajectories around a Kerr black hole 
    Prerna Rana; Mangalam, A (IOP Publishing, 2019-02-21)
    We derive alternate and new closed-form analytic solutions for the nonequatorial eccentric bound trajectories, {φ (r, θ), t(r, θ), r(θ)}, around a Kerr black hole by using the transformation 1/r = µ (1 + e cos χ). The ...
  • Astrophysically Useful Parameters for Certain Band Systems of BeH, BeD and BeT Molecules 
    Shanmugavel, R; Bagare, S. P; Rajamanickam, N (Astronomical Observatory, Serbia, 2006-12)
    The vibronic (vibration-electronic) transition probability parameters such as Franck-Condon (FC) factors and r-centroids of diatomic molecular species could be useful in the identification of molecular bands and in the ...
  • Astrophysically Useful Parameters for Some Vibronic Transitions of AlH and BH 
    Karthikeyan, B; Raja, V; Rajamanickam, N; Bagare, S. P (Springer, 2006-12)
    For molecular identification in astrophysical sources, an astrophysicist needs some spectroscopic parameters such as dissociation energy, vibrational or rotational temperature of the source, band or line wavelengths, ...
  • Astrophysics with new horizons: making the most of a generational opportunity 
    Zemcov, Michael; Arcavi, Iair; Arendt, Richard; Bachelet, Etienne; Ranga Ram Chary; Cooray, Asantha; Dragomir, Diana; Conn Henry, Richard; Lisse, Carey; Matsuura, Shuji; Murthy, J; Nguyen, Chi; Poppe, Andrew R; Street, Rachel; Werner, Michael (IOP Publishing, 2018-11)
    The outer solar system provides a unique, quiet vantage point from which to observe the universe around us, where measurements could enable several niche astrophysical science cases that are too difficult to perform near ...
  • The Astropy Project: Sustaining and Growing a Community-oriented Open-source Project and the Latest Major Release (v5.0) of the Core Package 
    The Astropy Collaboration; Price-Whelan, Adrian M; Lim, Pey Lian; Earl, Nicholas; Starkman, Nathaniel; Bradley, Larry; Shupe, David L; Patil, Aarya A; Corrales, Lia; Brasseur, C. E; Nothe, Maximilian; Singer, Leo P; Singhal, Jaladh; Sinha, Manodeep; Sipocz, Brigitta M; Spitler, Lee R; Stansby, David; Streicher, Ole; Sumak, Jani; Tollerud, Erik; Swinbank, John D; Paper Authors; Taranu, Dan S; Tewary, Nikita; Tremblay, Grant R; Val-Borro, Miguel de; Kooten, Samuel J. Van; Vasovic, Zlatan; Verm, Shresth; Cardoso, Jose Vinícius de Miranda; Williams, Peter K. G; Morris, Brett M; Aldcroft, Thomas L; Wilson, Tom J; Winkel, Benjamin; Wood-Vasey, W. M; Xue, Rui; Yoachim, Peter; Zhang, Chen; Zonca, Andrea; Astropy Project Contributors; Ginsburg, Adam; Vaher, Eero; Alvarado-Montes, Jaime A; Weaver, Benjamin A; Tocknell, James; Jamieson, William; Kerkwijk, Marten H. van; Robitaille, Thomas P.; Merry, Bruce; Bachetti, Matteo; Gunthe, H. Moritz; Archibald, Anne M; Bodi, Attila; Bapat, Shreyas; Barentsen, Geert; Bazan, Juanjo; Biswas, Manish; Boquien, Mederic; Handberg, Rasmus; Burke, D. J; Cara, Daria; Cara, Mihai; Conroy, Kyle E; Conseil, Simon; Craig, Matthew W; Cross, Robert M; Cruz, Kelle L; D'Eugenio, Francesco; Dencheva, Nadia; Hart, Akeem; Devillepoix, Hadrien A. R; Dietrich, Jorg P; Eigenbrot, Arthur Davis; Erben, Thomas; Ferreira, Leonardo; Foreman-Macke, Daniel; Fox, Ryan; Freij, Nabil; Garg, Suyog; Geda, Robel; Hatfield-Dodds, Zac; Glattly, Lauren; Gondhalekar, Yash; Gordon, Karl D; Grant, David; Greenfield, Perry; Groener, Austen M; Guest, Steve; Gurovich, Sebastian; Homeier, Derek; Hosseinzadeh, Griffin; Jenness, Tim; Jones, Craig K; Joseph, P; Kalmba, J. Bryce; Karamehmetoglu, Emir; Salgado, Jesus; Kałuszynski, Mikołaj; Kelley, Michael S. P; Kern, Nicholas; Kerzendor, Wolfgang E; Koch, Eric W; Kulumani, Shankar; Lee, Antony; Ly, Chun; M, Zhiyuan; MacBride, Conor; Sanghi, Aniket; Maljaars, Jakob M; Muna, Demitri; Murphy, N. A; Norman, Henrik; O'Steen, Richard; Oman, Kyle A; Pacifici, Camilla; Pascual, Sergio; Pascual-Granado, J; Patil, Rohit R; Saunders, Nicholas; Perren, Gabriel I; Pickering, Timothy E; Rastogi, Tanuj; Roulston, Benjamin R; Ryan, Daniel F; Rykoff, Eli S; Sabater, Jose; Sakurikar, Parikshit; Savchenko, Volodymyr; Schwardt, Ludwig; Seifert-Eckert, Michael; Shih, Albert Y; Jain, Anany Shrey; Shukla, Gyanendra; Sick, Jonathan; Donath, Axel; Simpson, Chris; Singanamalla, Sudheesh (American Astronomical Society, 2022-08-20)
    The Astropy Project supports and fosters the development of open-source and openly developed Python packages that provide commonly needed functionality to the astronomical community. A key element of the Astropy Project ...
  • ASTROSAT mission 
    Singh, Kulinder Pal; Tandon, S. N; Agrawal, P. C; Antia, H. M; Manchanda, R. K; Yadav, J. S; Seetha, S; Ramadevi, M. C; Rao, A. R; Bhattacharya, D; Paul, B; Sreekumar, P; Bhattacharyya, S; Stewart, G. C; Hutchings, J; Subramaniam, A; Ghosh, S. K; Murthy, J; Pati, A. K; Kameswara Rao, N; Stalin, C. S; Girish, V; Sankarasubramanian, K; Vadawale, S; Bhalerao, V. B; Dewangan, G. C; Dedhia, D. K; Hingar, M. K; Katoch, T. B; Kothare, A. T; Mirza, I; Mukerjee, K; Shah, H; Shah, P; Mohan, Rekhesh; Sangal, A. K; Nagabhusana, S; Sriram, S; Malkar, J. P; Sreekumar, S; Abbey, A. F; Hansford, G. M; Beardmore, A. P; Sharma, M. R; Murthy, S; Kulkarni, R; Meena, G; Babu, V. C; Postma, J (SPIE--The International Society for Optical Engineering, 2014-07)
    ASTROSAT is India’s first astronomy satellite that will carry an array of instruments capable of simultaneous observations in a broad range of wavelengths: from the visible, near ultraviolet (NUV), far-UV (FUV), soft X-rays ...
  • AstroSat observation of non-resonant type-C QPOs in MAXI J1535-571 
    Chatterjee, Debjit; Debnath, D; Jana, A; Shang, J.-R.; Chakrabarti, S.K.; Chang, H.-K; Banerjee, A; Bhattacharjee, A; Chatterjee, K; Bhowmick, R; Nath, S.K (Springer, 2021-08)
    Galactic transient black hole candidate (BHC) MAXI J1535-571 was discovered on 2017 September 02 simultaneously by MAXI/GSC and Swift/BAT instruments. It has also been observed by India’s first multi-wavelength astronomy-mission ...
  • ASTROSAT observations: complementary studies from ground 
    Sreekumar, P (Astronomical Society of India, 2005-06)
    Since the advent of the satellite era, X-ray astronomy and UV astronomy have advanced tremendously. The discovery of intense X-ray emission from accreting compact objects has permitted very detailed timing and spectral ...
  • AstroSat soft X-ray observations of the symbiotic recurrent nova V3890 Sgr during its 2019 outburst 
    Singh, K. P; Girish, V; Pavana, M; Ness, J.-U; Anupama, G. C; Orio, M (Oxford University Press on behalf of the Royal Astronomical Society, 2021-02)
    Two long AstroSat Soft X-ray Telescope observations were taken of the third recorded outburst of the symbiotic recurrent nova V3890 Sgr. The first observing run, 8.1–9.9 d after the outburst, initially showed a stable ...
  • AstroSat Study of the Globular Cluster NGC 2298: Probable Evolutionary Scenarios of Hot Horizontal Branch Stars 
    Rani, Sharmila; Pandey, G; Subramaniam, A; Chung, Chul; Sahu, S; Kameswara Rao, N (IOP Publishing, 2021-12-20)
    We present the far-UV (FUV) photometry of images acquired with UVIT on AstroSat to probe the horizontal branch (HB) population of the Galactic globular cluster NGC 2298. UV-optical color–magnitude diagrams (CMDs) are ...
  • AstroSat view of GRS 1915+105 during the soft state: detection of HFQPOs and estimation of mass and spin 
    Sreehari, H; Nandi, Anuj; Das, Santabrata; Agrawal, V. K; Mandal, Samir; Ramadevi, M. C; Katoch, Tilak (Oxford University Press on behalf of the Royal Astronomical Society, 2020-12)
    We report the results of AstroSat observations of GRS 1915+105 obtained using 100 ks Guaranteed Time during the soft state. The colour–colour diagram indicates a variability class of δ with the detection of high-frequency ...
  • Asymmetric lepton production in a universe with non-zero baryon number 
    Sivaram, C (Springer, 1982-03)
    Due to processes occurring during different stages of stellar evolution, a universe with a net baryon number develops an excess of neutrinos and positrons over antineutrinos of the same order as the observed relative ...
  • Asymmetry in energy transfer in a collision of galaxies 
    Ahmed, Farooq; Alladin, S. M (Astronomical Society of India, 1981-03)
    The time dependence of binding and translational energies of a pair of galaxies during head-on collisions has been studied with impulsive approximation. The two galaxies are assumed to be identical with mass distribution ...
  • Asymmetry in the length scales of the solar supergranulation network 
    Raju, K. P (IOP Publishing, 2020-08-20)
    Supergranulation is the horizontal velocity pattern on the solar surface with a typical size of 30,000 km and a lifetime of 24 hr. The network structure seen in chromospheric lines, such as Ca ii K 3934 Å, is the manifestation ...
  • Asymmetry parameter and efficiency for radiation pressure and scattering of electromagnetic radiation by a very large dielectric sphere 
    Shah, G. A (Kluwer Academic Publisher, 1991)
    The asymmetry parameter of the scattering diagram and the efficiency for radiation pressure for scattering by a very large dielectric sphere conforming to geometrical optics and diffraction, have been investigated beyond ...
  • Asymptotic giant branch stars in the ISOGAL survey 
    Ojha, D. K; Omont, A; Simon, G; Blommaert, J (Astronomical Society of India, 2000)
    We present and analyse the data of a field at 1 = 0o, b = +1o from the ISOGAL survey of selected areas of the inner Galactic bulge at 15 and 7 ?m. In combination with IJKs data from the near-infrared southern sky survey ...
  • Asymptotic Values of Some Scattering Parameters from Mie Theory 
    Shah, G. A (Indian Institute of Astrophysics, Bangalore, 1991)
    The scattering parameters such as extinction efficiency, albedo, asymmetry parameter, etc, have been studied on the basis of the Mie theory of scattering of electromagnetic radiation by a sphere as well as the classical ...
  • At what energy does gravity unite with grand unified theories in the early universe? 
    Sivaram, C (Springer, 1987-12)
    Unification of gravity with GUTs is usually expected at the Planck energy E pl≈10/sup19 GeV. However, the vastly different values of the two couplings at E Pl ( α GUT« 1, α grav≈ 1) would make such unity (at E Pl) implausible ...
  • AT2020ohl: its nature and probable implications 
    Roy, Rupak; Mandal, Samir; Sahu, D. K; Anupama, G. C; Nandi, Sumana; Kumar, Brijesh (Oxford University Press on behalf of Royal Astronomical Society., 2024-03)
    ASASSN-20hx, a.k.a AT2020ohl, is an ambiguous nuclear transient, which was discovered in the nearby galaxy NGC6297 by the All-Sky Automated Survey for Supernovae. We have investigated the evolution of AT2020ohl using a ...

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