IIAP Publications: Recent submissions

  • How CMB and large-scale structure constrain chameleon interacting dark energy 
    Boriero, Daniel; Das, Subinoy; Wong, Yvonne Y. Y (IOP Publishing, 2015-06)
    We explore a chameleon type of interacting dark matter-dark energy scenario in which a scalar field adiabatically traces the minimum of an eff ective potential sourced by the dark matter density. We discuss extensively ...
  • Properties of Narrow line Seyfert 1 galaxies 
    Rakshit, S; Stalin, C. S; Chand, H; Zhang, X (Bulletin de la Societe Royale des Sciences de Liege, 2018-04)
    Narrow line Seyfert 1 (NLSy1) galaxies constitute a class of active galactic nuclei characterized by the full width at half maximum (FWHM) of the Hα broad emission line <2000 km s-1 and the flux ratio of [O III] to Hα ...
  • Giant Low Surface Brightness Galaxies 
    Mishra, A; Kantharia, N. G; Mousumi Das; Nimisha, G (Bulletin de la Societe Royale des Sciences de Liege, 2018-04)
    In this paper, we present radio observations of the giant low surface brightness (LSB) galaxies made using the Giant Metrewave Radio Telescope (GMRT). LSB galaxies are generally large, dark matter dominated spirals that ...
  • Core-collapse SNe of type IIP and their progenitors: The case study of PNV J01315945+3328458 
    Dastidar, R; Kumar, B; Sahu, D. K; Misra, K; Singh, M; Gangopadhyay, A; Anapuma, G. C; Pandey, S. B (Societe Royale des Sciences de Liege, 2018-04)
    The type II supernovae (SNe) are hydrogen-rich cosmic explosions resulting from the collapse of massive stars. The impetus of studying individual events arises from its cosmological importance and the diverse understanding ...
  • Light Curve and Spectral Evolution of Type IIb Supernovae 
    Gangopadhyay, A; Misra, K; Pastorello, A; Sahu, D. K; Singh, M; Dastidar, R; Anapuma, G. C; Kumar, B; Pandey, S. B (Societe Royale des Sciences de Liege, 2018-04)
    Stripped-Envelope Supernovae constitute the sub-class of core-collapse supernovae that strip off their outer hydrogen envelope due to high stellar winds or due to interaction with a binary companion where mass transfer ...
  • Multi-band optical variability studies of Blazars 
    Aditi Agarwal (Societe Royale des Sciences de Liege, 2018-04)
    To search for optical variability on a wide range of timescales, we have carried out photometric monitoring of a dozen blazars. CCD magnitudes in B, V, R and I pass-bands were determined for > 10,000 new optical observations ...
  • Physics and observations of tidal disruption events 
    Mangalam, A; Mageshwaran, T (Societe Royale des Sciences de Liege, 2018-04)
    We describe a model of tidal disruption events (TDEs) with input physical parameters that include the black hole (BH) mass M•, the specific orbital energy E, the angular momentum J, the star mass M? and radius R?. We ...
  • Dual Active Galactic Nuclei in Nearby Galaxies 
    Mousumi Das; Rubinur, K; Preethi, K; Varghese, A; Novakkuni, N; James, A (Societe Royale des Sciences de Liege, 2018-04)
    Galaxy mergers play a crucial role in the formation of massive galaxies and the buildup of their bulges. An important aspect of the merging process is the in-spiral of the supermassive black-holes (SMBHs) to the centre ...
  • Probing the central engine and environment of AGN using ARIES 1.3-m and 3.6-m telescopes 
    Chand, H; Rakshit, S; Jalan, P; Ojha, V; Srianand, R; Vivek, M; Mishra, S; Omar, A; Kumar, P; Joshi, R; Gopal Krishna; Kumar, R (Societe Royale des Sciences de Liege, 2018-04)
    : We discuss three long term observational programmes to probe the central engine and environment of active galactic nuclei (AGN) using the recently installed ARIES 1.3-m and 3.6-m telescopes. The first programme is on ...
  • Investigating Extra-solar Planetary System Qatar-1 through Transit Observations 
    Thakur, P; Mannaday, V. K; Jiang, I; Sahu, D. K; Chand, S (Societe Royale des Sciences de Liege, 2018-04)
    We report the results of the transit timing variation (TTV) analysis of the extra-solar planet Qatar1b using thirty eight light curves. Our analysis combines thirty five previously available transit light curves with three ...
  • Facilities at Indian Institute of Astrophysics and New Initiatives 
    Bhatt, B. C (Societe Royale des Sciences de Liege, 2018-04)
    The Indian Institute of Astrophysics is a premier national institute of India for the study of and research into topics pertaining to astronomy, astrophysics and related subjects. The Institute’s main campus in Bangalore ...
  • Present status of the 4-m ILMT data reduction pipeline: application to space debris detection and characterization 
    Pradhan, B; Delchambre, L; Akhunov, T; Hickson, P; Bartczak, P; Kumar, B; Surdej, J (Societe Royale des Sciences de Liege, 2018-04)
    The 4-m International Liquid Mirror Telescope (ILMT) located at the ARIES Observatory (Devasthal, India) has been designed to scan at a latitude of +29◦ 22’ 26” a band of sky having a width of about half a degree in the ...
  • Supernovae study: Context of the 4-m International Liquid Mirror Telescope 
    Kumar, B; Pandey, S. B; Pandey, Kanhaiya L; Anapuma, G. C; Surdej, J (Societe Royale des Sciences de Liege, 2018-04)
    The upcoming 4-m International Liquid Mirror Telescope (ILMT) facility will perform deep imaging (in single scan g 0 ∼22 mag) of a narrow strip of sky each clear night in the Time Delayed Integration mode. A cadence of ...
  • The 4-m International Liquid Mirror Telescope 
    Surdej, J; Hickson, P; Borra, E; Swings, J; Habraken, S; Akhunov, T; Bartczak, P; Chand, H; De Becker, M; Delchambre, L; Finet, F; Kumar, B; Pandey, A; Pospieszalska, A; Pradhan, B; Sagar, R; Wertz, O; De Cat, P; Denis, S; de Ville, J; Jaiswar, M. K; Lampens, P; Nanjappa, N; Tortolani, J (Societe Royale des Sciences de Liege, 2018-04)
    The 4-m International Liquid Mirror Telescope (ILMT) is presently (March-June 2017) being erected on the ARIES site in Devasthal (Uttarakhand). We describe and illustrate in the present paper its different components. ...
  • 3.6-m Devasthal Optical Telescope Project: Completion and first results 
    Kumar, Brijesh; Omar, A; Maheswar, G; Pandey, A. K; Sagar, R; Uddin, W; Sanwal, B. B; Bangia, T; Kumar, T. S; Yadav, S; Sahu, S; Pant, J; Reddy, B. K; Gupta, A. C; Chand, H; Pandey, J. C; Joshi, M. K; Jaiswar, M; Nanjappa, N; Purushottam; Yadav, R. K. S; Sharma, S; Pandey, S. B; Joshi, S; Joshi, Y. C; Lata, S; Mehdi, B. J; Misra, K; Singh, M (Societe Royale des Sciences de Liege, 2018-04)
    We present an update on the 3.6-m aperture optical telescope, which has been installed at Devasthal in the year 2016. In this paper, a brief overview of installation activities at site and first results are presented. The ...
  • Measurement of astronomical seeing using long exposure solar images 
    Sridharan, R; Ravindra, B; Prabhu, K (Springer, 2019-01)
    We extend our modified parameter search method (Sridharan, Dashora, and Venkatakrishnan, Solar Phys.222, 35, 2004) of estimating the Fried parameter (r0) from long exposure images to the images obtained from the Hα-telescope ...
  • Spectroscopic study of two new super Li-rich red clump K giants 
    Raghubar, Singh; Reddy, B. E; Bharat Kumar, Y (Oxford University Press on behalf of the Royal Astronomical Society, 2019-01)
    In this paper, we report the discovery of two new super Li-rich K giants: HD 24960 and TYC 1751-1713-1. Based on high-resolution (R ≈ 60 000) spectroscopy, we have derived Li abundance of A(Li) ≈ 4.0 dex for both ...
  • UVIT–HST–GAIA view of NGC 288: a census of the hot stellar population and its properties from UV 
    Snehalata Sahu; Subramaniam, A; Cote, Patrick; Kameswara Rao, N; Stetson, Peter B (Oxford University Press on behalf of the Royal Astronomical Society, 2019-01)
    A complete census of the blue horizontal branch (BHB) and blue straggler star (BSS) population within a 10 radius from the centre of the globular cluster NGC 288 is presented, based on images from the Ultraviolet Imaging ...
  • The puzzling high velocity G5 supergiant star HD 179821: new insight from Gaia DR2 data 
    Parthasarathy, M; Jasniewicz, G; Thevenin, F (Springer, 2019-01)
    HD 179821 is classified as G5 Ia star. From the IRAS colors and spectral energy distributions it was classified as a post-AGB star. But some studies classify it as a massive (30 to 19 M⊙) post-red supergiant evolving to ...
  • Minkowski Tensors in Two Dimensions: Probing the Morphology and Isotropy of the Matter and Galaxy Density Fields 
    Appleby, S; Pravabati, C; Park, C; Hong, S. E; Kim, J; Vidhya, G (IOP Publishing, 2018-05-10)
    We apply the Minkowski tensor statistics to two-dimensional slices of the three-dimensional matter density field. The Minkowski tensors are a set of functions that are sensitive to directionally dependent signals in the ...

Search DSpace


Browse

My Account