IIAP Publications: Recent submissions

  • UVIT observations of the star-forming ring in NGC 7252: Evidence of possible AGN feedback suppressing central star formation 
    George, K; Joseph, P; Mondal, Chayan; Devaraj, A; Subramaniam, A; Stalin, C. S; Cote, P; Ghosh, S. K; Hutchings, J. B; Mohan, Rekhesh; Postma, J; Sankarasubramanian, K; Sreekumar, P; Tandon, S. N (EDP Sciences, 2018-05)
    Context. Some post-merger galaxies are known to undergo a starburst phase that quickly depletes the gas reservoir and turns it into a red-sequence galaxy, though the details are still unclear. Aims. Here we explore the ...
  • Intra-night Optical Variability Monitoring of Fermi Blazars: First Results from 1.3 m J. C. Bhattacharya Telescope 
    Paliya, Vaidehi S; Stalin, C. S; Ajello, M; Kaur, A (IOP Publishing, 2017-08)
    We report the first results obtained from our campaign to characterize the intra-night-optical variability (INOV) properties of Fermi detected blazars, using the observations from the recently commissioned 1.3 m J. ...
  • GASP. XV. A MUSE view of extreme ram-pressure stripping along the line of sight: physical properties of the jellyfish galaxy JO201 
    Bellhouse, C; Jaffe, Y. L; McGee, S. L; Poggianti, B. M; Smith, R; Tonnesen, S; Fritz, J; Hau, G. K .T; Gullieuszik, M; Vulcani, B; Fasano, G G; Moretti, A; George, K; Bettoni, D; nofrio, O, M.D; Omizzolo, A; Sheen, Y.K (Oxford University Press on behalf of the Royal Astronomical Society, 2019-05)
    We present a study of the physical properties of JO201, a unique disc galaxy with extended tails undergoing extreme ram-pressure stripping (RPS) as it moves through the massive cluster Abell 85 at supersonic speeds mostly ...
  • Three-dimensional Monte Carlo dust radiative transfer study of the H-poor planetary nebula IRAS 18333–2357 located in M22 
    Muthumariappan, C (Oxford University Press on behalf of the Royal Astronomical Society, 2017-08)
    We analyse the characteristics of dust and its distribution in the planetary nebula IRAS 18333– 2357 located in M22 using a three-dimensional radiative transfer code HOCHUNK3D. The spectral energy distribution was ...
  • An automated extinction and sky brightness monitor for the Indian Astronomical Observatory, Hanle 
    Sharma, T. K; Parihar, P. S; Banyal, R. K; Ahmad Dar, Ajaz; Kemkar, P. M. M; Stanzin, U; Anupama, G. C (Oxford University Press on behalf of the Royal Astronomical Society, 2017-08)
    We have developed a simple and portable device that makes precise and automated measurements of night sky extinction. Our instrument uses a commercially available telephoto lens for light collection, which is retrofitted ...
  • Gravitational Lensing and Microlensing in Clusters: Clusters as Dark Matter Telescopes 
    Safonova, M (Societe Royale des Sciences de Liege, 2018-04)
    Gravitational lensing is brightening of background objects due to deflection of light by foreground sources. Rich clusters of galaxies are very effective lenses because they are centrally concentrated. Such natural Gravitational ...
  • PAH features within few hundred parsecs of active galactic nuclei 
    Jensen, J. J; Honig, S. F; Rakshit, S; Alonso-Herrero, A; Asmus, D; Gandhi, P; Kishimoto, M; Smette, A; Tristram, K. R. W (Oxford University Press on behalf of the Royal Astronomical Society, 2017-08)
    Spectral features from polycyclic aromatic hydrocarbon (PAH) molecules observed in the mid-infrared (mid-IR) range are typically used to infer the amount of recent and ongoing star formation on kiloparsec scales around ...
  • Relation between solar flares and halo coronal mass ejections 
    Koteswara Rao, V; Rama Gopal, K; Ramakrishna Reddy, R; Amareswari, K; Sankarasubramanian, K (Indian Academy of Sciences, 2019-02)
    Solar flares and coronal mass ejections (CMEs) are two very important active events from Sun. Inspite of several theoretical and statistical analyses, the relation between solar flares and CMEs is so far not well ...
  • 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 ...
  • Kodaikanal digitized white-light data archive (1921-2011): Analysis of various solar cycle features 
    Mandal, Sudip; Hegde, M; Samanta, T; Hazra, G; Banerjee, D; Ravindra, B (EDP Sciences, 2017-05)
    Context. Long-term sunspot observations are key to understanding and predicting the solar activities and its effects on space weather. Consistent observations, which are crucial for long-term variations studies, are generally ...
  • CO outflow survey of 68 very low luminosity objects: a search for proto-brown-dwarf candidates 
    Kim, G; Lee, C.W; Maheswar, G; Kim, Mi-Ryang; Archana Soam; Saito, Masao; Kiyokane, Kazuhiro; Kim, Sungeun (IOP Publishing, 2019-02)
    We present the results of a systematic search for molecular outflows in 68 Very Low Luminosity Objects (VeLLOs) from single-dish observations in CO isotopologues, finding 16 VeLLOs that show clear outflow signatures in the ...
  • Description of C2 dissociation using a naive treatment of dynamical correlation in the presence of quasidegeneracy of varying degree 
    Ray, S. S; Manna, S; Chaudhuri, R. K; Chattopadhyay, S (Taylor & Francis, 2017-05-19)
    To obtain even qualitatively correct results of potential energy surfaces (PESs) of the ground and two lowest-lying excited singlet states of C2 is a difficult task due to the strong geometry-dependent closeness of these ...
  • Dissipation scale lengths of solar wind turbulence 
    Sasikumar Raja, K; Subramanian, P; Ingale, M; Ramesh, R (IOP Publishing, 2019-02-10)
    Knowing the lengthscales at which turbulent fluctuations dissipate is key to understanding the nature of weakly compressible magnetohydrodynamic turbulence. We use radio wavelength interferometric imaging observations ...
  • First Imaging Observation of Standing Slow Wave in Coronal Fan Loops 
    Pant, V; Tiwari, A; Yuan, D; Banerjee, D (IOP Publishing, 2017-09)
    We observe intensity oscillations along coronal fan loops associated with the active region AR 11428. The intensity oscillations were triggered by blast waves that were generated due to X-class flares in the distant ...
  • Is a Deep One-cell Meridional Circulation Essential for the Flux Transport Solar Dynamo? 
    Hazra, G; Karak, B. B; Choudhuri, A. R (IOP Publishing, 2014-02-20)
    The solar activity cycle is successfully modeled by the flux transport dynamo, in which the meridional circulation of the Sun plays an important role. Most of the kinematic dynamo simulations assume a one-cell structure ...
  • A curved 150 pc long jet in the double-peaked emission-line AGN KISSR 434 
    Kharb, P; Vaddi, Sravani; Sebastian, B; Subramanian, S; Mousumi Das; Paragi, Z (IOP Publishing, 2019-02-01)
    Double-peaked emission lines in the narrow- and/or broad-line spectra of active galactic nuclei (AGNs) have been suggested to arise as a result of disky broad/narrow-line regions, jet–medium interaction, or the presence ...
  • Using an artificial neural network to classify multicomponent emission lines with integral field spectroscopy from SAMI and S7 
    Hampton, E. J; Medling, A. M; Groves, B; Kewley, L; Dopita, M; Davies, R; Ho, I-Ting; Kaasinen, M; Leslie, S; Sharp, R; Sweet, S. M; Thomas, A. (Oxford University Press on behalf of the Royal Astronomical Society, 2017-09)
    Integral field spectroscopy (IFS) surveys are changing how we study galaxies and are creating vastly more spectroscopic data available than before. The large number of resulting spectra makes visual inspection of emission ...
  • SN 2015ba: a Type IIP supernova with a long plateau 
    Dastidar, R; Misra, K; Hosseinzadeh, G; Pastorello, A; Pumo, M. L; Valenti, S; McCully, C; Tomasella, L; Arcavi, I; Elias-Rosa, N; Singh, M; Gangopadhyay, A; Howell, D. A; Morales-Garoffolo, A; Zampieri, L; Kumar, Brijesh; Turatto, M; Benetti, S; Tartaglia, L; Ochner, P; Sahu, D. K; Anupama, G. C; Pandey, S. B (Oxford University Press on behalf of the Royal Astronomical Society, 2018-09)
    We present optical photometry and spectroscopy from about a week after explosion to ∼272 d of an atypical Type IIP supernova, SN 2015ba, which exploded in the edge-on galaxy IC 1029. SN 2015ba is a luminous event with an ...
  • The extended H i disk and star formation in the dwarf spiral galaxy NGC 4701 
    Mousumi Das; Sengupta, C; Honey, M (IOP Publishing, 2019-02-01)
    We present H i, optical, and near-infrared observations of the nearby bulgeless, dwarf spiral galaxy NGC 4701. The galaxy lies on the Virgo filament and is one of the most gas-rich dwarfs in our local environment. Our aim ...
  • The nature of the Stingray nebula from radio observations 
    Harvey-Smith, L; Hardwick, J. A; De Marco, O; Parthasarathy, M; Gonidakis, I; Shaila Akhter; Cunningham, M; Green, J. A (Oxford University Press on behalf of the Royal Astronomical Society, 2018-09)
    We have analysed the full suite of Australia Telescope Compact Array data for the Stingray planetary nebula. Data were taken in the 4–23 GHz range of radio frequencies between 1991 and 2016. The radio flux density of the ...

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