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  • Decametric radio spectra of some galaxies in clusters 
    Subramanian, K. R; Sastry, Ch. V (Astronomical Society of Indian, 1988-12)
    Observations of 12 radio sources identified with clusters of galaxies were made in 1983-84 with a decameter-wave radio telescope. The measured flux densities at 34.5 MHz are combined with other low frequency measurements ...
  • Decay of massive photinos and gravitinos and keV X-ray background 
    Sivaram, C (INSDOC, 1983-08)
    The contributions of the decay of supersymmetry-breaking photinos and gravitinos with masses of a few keV to the X-ray background and of neutrinos with mass about 20 eV to the UV background are discussed, using the Coma ...
  • Decaying turbulence and magnetic fields in galaxy clusters 
    Sur, Sharanya (Oxford University Press on behalf of the Royal Astronomical Society, 2019-12)
    We explore the decay of turbulence and magnetic fields generated by fluctuation dynamo action in the context of galaxy clusters where such a decaying phase can occur in the aftermath of a major merger event. ...
  • Decaying turbulence and magnetic fields in galaxy clusters 
    Sur, Sharanya (Oxford University Press on behalf of the Royal Astronomical Society, 2019-09)
    We explore the decay of turbulence and magnetic fields generated by fluctuation dynamo action in the context of galaxy clusters where such a decaying phase can occur in the aftermath of a major merger event. Using idealized ...
  • Deciphering Solar Magnetic Activity: 140 Years of the ‘Extended Solar Cycle’ – Mapping the Hale Cycle 
    McIntosh, Scott W; Leamon, Robert J; Egeland, Ricky; Dikpati, Mausumi; Altrock, Richard C; Banerjee, D; Chatterjee, Subhamoy; Srivastava, Abhishek K; Velli, Marco (Springer, 2021-12)
    We investigate the occurrence of the “extended solar cycle” (ESC) as it occurs in a host of observational data spanning 140 years. Investigating coronal, chromospheric, photospheric, and interior diagnostics, we develop ...
  • Decoding the compositions of four bright r-process-enhanced stars 
    Saraf, Pallavi; Prieto, Carlos Allende; Sivarani, T; Bandyopadhyay, A; Beers, Timothy C.; Susmitha, A (Oxford University Press on behalf of Royal Astronomical Society, 2023-10)
    There has been a concerted effort in recent years to identify the astrophysical sites of the r-process that can operate early in the galaxy. The discovery of many r-process-enhanced (RPE) stars (especially by the R-process ...
  • Decoding the X-Ray Flare from MAXI J0709–159 Using Optical Spectroscopy and Multiepoch Photometry 
    Bhattacharyya, Suman; Mathew, Blesson; Ezhikode, Savithri H; Muneer, S; Selvakumar, G; Maheswar, G; Arun, R; Anilkumar, Hema; Banerjee, Gourav; Kumar, S. P; Kartha, Sreeja S; Paul, KT; Velu, C (IOP Publishing, 2022-07-10)
    We present a follow-up study on the recent detection of two X-ray flaring events by MAXI/Gas Slit Camera observations in soft and hard X-rays from MAXI J0709–159 in the direction of HD 54786 (LY CMa), on 2022 January 25. ...
  • Decollimation of a jet due to spacetime curvature 
    Kapoor, R. C (International Astronomical Union, 1986)
  • Decomposition of data into a sum of nonlinear functions Application to astronomical observations 
    Anandarao, B. G; Rao, S. R (Astronomical Society of Indian, 1986-03)
    In astronomical observations we often encounter spectra which are a result of superposition of individual contributions from phenomena of similar kind. We describe here a method together with its algorithm by which one can ...
  • Decomposition of the Galactic Disk: Abundances and Kinematics 
    Reddy, B. E (Cambridge University Press, 2007-08)
    To this contribution we present a brief review of our recent abundance surveys (Reddy et al. 2003; Reddy et al. 2006) of the Milky Way galaxy. Survey focussed on controlled samples of stars selected based on their kinematic ...
  • Deconstructing IRAS 07027-7934 
    Surendiranath, R (EDP Sciences, 2002-08)
    The planetary nebula IRAS 07027-7934 has a compact ionized core surrounded by a large cloud of matter believed to be of neutral gas and dust particles. A photoionization model of this ionized core is presented in this ...
  • Deconvolution and self-calibration in radio astronomy using MEM 
    Shevgaonkar, R. K (Tata Institute of Fundamental Reserach, 1988)
    Aperture synthesis technique is the most powerful indirect imaging technique used in radio astronomy for obtainIng high resolution images. The technique, instead of measuring the image directly, measures its Fourier ...
  • A Deconvolution Method for Astronomical Photometric and Spectroscopic Observations 
    Anandarao, B. G; Rao, S. R (Astronomical Society of Indian, 1986-03)
    A numerical method for deconvoluting one-dimensional optical imaging is described along with its algorithm. This method can be very successfully used for archieving image enhancement and restoration with minimized noise, ...
  • A deep BVI photometric study of the open cluster NGC 2453 
    Mallik, D. C. V; Sagar, R; Pati, A. K (EDP Sciences, 1995-12)
    CCD observations of the open cluster NGC 2453 have been carried out in B, V and I passbands. A total of 356 stars have been observed in a field of about 4'x6' of the sky centred on the cluster. Colour-magnitude diagrams ...
  • A deep focus on NGC 1883 
    Tadross, A. L (Astronomical Society of India, 2005-12)
    A deep photometric analysis in the open star cluster NGC 1883 has been presented here and added to the work of Carraro et al. (2003), which is the only previous work introduced for this cluster. The radius and metallicity ...
  • Deep galaxy surveys : The IR/submm window 
    Guiderdoni, B (Astronomical Society of India, 1998)
  • Deep Impact, Stardust-NExT and the behavior of Comet 9P/Tempel 1 from 1997 to 2010 
    Meech, K. J; Pittichova, J; Yang, B; Zenn, A; Belton, M. J. S; A’Hearn, M. F; Bagnulo, S; Bai, J; Barrera, L; Bauer, J. M; Bedient, J; Bhatt, B. C; Boehnhardt, H; Brosch, N; Buie, M; Candia, P; Chen, W; Chesley, S; Chiang, P; Choi, Y; Cochran, A; Duddy, S; Farnham, T. L; Fernández, Y; Gutiérrez, P; Hainaut, O. R; Hampton, D; Herrmann, K; Hsieh, H; Kadooka, M. A; Kaluna, H; Keane, J; Kim, M; Kleyna, J; Krisciunas, K; Lauer, T. R; Lara, L; Licandro, J; Lowry, S. C; McFadden, L. A; Moskovitz, N; Mueller, B. E. A; Polishook, D; Raja, N. S; Riesen, T; Sahu, D. K; Samarasinha, N. H; Sarid, G; Sekiguchi, T; Sonnett, S; Suntzeff, N; Taylor, B; Tozzi, G. P; Vasundhara, R; Vincent, J; Wasserman, L; Webster-Schultz, B; Zhao, H (Elsevier B.V., 2011-05)
    We present observational data for Comet 9P/Tempel 1 taken from 1997 through 2010 in an international collaboration in support of the Deep Impact and Stardust-NExT missions. The data were obtained to characterize the nucleus ...
  • Deep Impact: Observations from a Worldwide Earth-Based Campaign 
    Meech, K. J; Ageorges, N; A'Hearn, M. F; Arpigny, C; Ates, A; Aycock, J; Bagnulo, S; Bailey, J; Barber, R; Barrera, L; Barrena, R; Farnham, T. L; Feldman, P; Fernández, Y. R; Filipovic, M. D; Lyke, J; Fisher, S; Fitzsimmons, A; Fong, D; Fugate, R; Jones, G. H; Serra-Ricart, M; Fujiwara, H; Fujiyoshi, T; Furusho, R; Fuse, T; Gibb, E; Groussin, O; Lynch, D; Gulkis, S; Gurwell, M; Hadamcik, E; Sharp, R; Magee, S. K; Hainaut, O; Harker, D; Harrington, D; Harwit, M; Hasegawa, S; Hergenrother, C. W; Hirst, P; Ma, J; Hodapp, K; Snell, R. L; Villanueva, G; Jones, P. A; Kadono, T; Kamath, U. W; Käufl, H. U; Kasuga, T; Kawakita, H; Kelley, M. S; Kerber, F; Kidger, M; Snodgrass, C; Kinoshita, D; von Braun, K; Maheswar, G; Knight, M; Lara, L; Larson, S. M; Lederer, S; Lee, C. F; Levasseur-Regourd, A. C; Li, J. Y; Blake, G; Li, Q. S; Licandro, J; Vora, P; Bauer, J. M; Manfroid, J; Marco, O; Martin, P; Melnick, G; Miller, S; Miyata, T; Stallard, T; Moriarty-Schieven, G. H; Moskovitz, N; Mueller, B. E. A; Wainscoat, R. J; Mumma, M. J; Belton, M. J. S; Muneer, S; Neufeld, D. A; Ootsubo, T; Osip, D; Stecklein, G; Pandea, S. K; Pantin, E; Paterno-Mahler, R; Patten, B; Walsh, K; Penprase, B. E; Peck, A; Bensch, F; Petitpas, G; Pinilla-Alonso, N; Sterken, C; Pittichova, J; Pompei, E; Prabhu, T. P; Qi, C; Rao, R; Watanabe, J; Rauer, H; Reitsema, H; Rodgers, S. D; Bhattacharya, B; Stüwe, J. A; Rodriguez, P; Ruane, R; Ruch, G; Rujopakarn, W; Sahu, D. K; Sako, S; Weaver, H. A; Sakon, I; Samarasinha, N; Sarkissian, J. M; Weiler, M; Saviane, I; Biver, N; Schirmer, M; Schultz, P; Schulz, R; Seitzer, P; Sekiguchi, T; Weaver, W; Selman, F; Honda, M; Sugita, S; Sumner, M; Suntzeff, N; Swaters, R; Takakuwa, S; Takato, N; Bockelée-Morvan, D; Thomas-Osip, J; Thompson, E; Tokunaga, A. T; Howell, E. S; Bonev, B. P; Tozzi, G. P; Tran, H; Troy, M; Trujillo, C; Van Cleve, J; Vasundhara, R; Vazquez, R; Boehnhardt, H; Vilas, F; Hutsemékers, D; Lin, Z. Y; Weissman, P. R; Welsh, W. F; Wilner, D; Wolk, S; Womack, M; Wooden, D; Woodney, L. M; Woodward, C; Wu, Z. Y; Iono, D; Wu, J. H; Lisse, C. M; Bonev, T; Yamashita, T; Yang, B; Yang, Y. B; Yokogawa, S; Zook, A. C; Zauderer, A; Zhao, X; Ip, W. H; Zhou, X; Zucconi, J. M; LoCurto, G; Buie, M. W; Burton, M. G; Butner, H. M; Cabanac, R; Campbell, R; Campins, H; Capria, M. T; Jackson, W; Carroll, T; Chaffee, F; Charnley, S. B; Lovell, A. J; Cleis, R; Coates, A; Cochran, A; Colom, P; Conrad, A; Coulson, I. M; Jehin, E; Crovisier, J; deBuizer, J; Dekany, R; de Léon, J; Lowry, S. C; Dello Russo, N; Delsanti, A; DiSanti, M; Drummond, J; Dundon, L; Jiang, Z. J; Etzel, P. B (Science, 2005-10)
    On 4 July 2005, many observatories around the world and in space observed the collision of Deep Impact with comet 9P/Tempel 1 or its aftermath. This was an unprecedented coordinated observational campaign. These data show ...
  • Deep impacting the Comet - 103P/Hartley 2 on Nov 4, 2010 
    Kapoor, R. C (The Hawk, 2010-09-17)
  • A Deep Investigation of Two Poorly Studied Open Clusters Haffner 22 and Melotte 71 in the Gaia era 
    Bisht, D; Zhu, Qingfeng; Yadav, R. K. S; Rangwal, Geeta; Sariya, Devesh P; Durgapal, Alok; Jiang, Ing-Guey (IOP Publishing, 2022-04)
    This paper presents a deep investigation of two open clusters, Haffner 22 and Melotte 71, using astrometric and photometric data from Gaia EDR3. We identified 382 and 597 most probable cluster members with membership ...

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