IIAP Publications: Recent submissions

  • Sunspot drawings at Kodaikanal Observatory: a representative results on hemispheric sunspot numbers and area measurements 
    Ravindra, B; Kumaravel, P; Selvendran, R; Samuel, Joyce; Kumar, P; Nancy Jassoria; Navneeth, R. S (Springer, 2020-01)
    The importance of the periodicity in sunspot appearance was well recognized by the mid-19th century. Several observatories around the globe have made the record of sunspots in the form of drawings and preserved them safely ...
  • The VMC survey – XXXIV. Morphology of stellar populations in the Magellanic Clouds 
    Youssouf, Dalal El; Cioni, Maria-Rosa L; Bell, Cameron P. M; Rubele, Stefano; Bekki, Kenji; Grijs, Richard de; Girardi, Leo; Ivanov, Valentin D; Matijevic, Gal; Niederhofer, Florian; Oliveira, Joana M; Ripepi, Vincenzo; Subramanian, S; van Loon, Jacco Th (Oxford University Press on behalf of the Royal Astronomical Society, 2019-11)
    The Magellanic Clouds are nearby dwarf irregular galaxies whose morphologies show different properties when traced by different stellar populations, making them an important laboratory for studying galaxy morphologies. We ...
  • Testing Alfvén wave propagation in a “realistic” set-up of the solar atmosphere 
    Chatterjee, Piyali (Taylor & Francis, 2020-07)
    We present a radiative magneto-hydrodynamic simulation set-up using the pencil code to study the generation, propagation and dis- sipation of Alfvén waves in the solar atmosphere which includes a convective layer, ...
  • Evolution of the universe and Earth’s place in cosmos – The 2019 Nobel Prize for Physics 
    Murthy, J (Indian Academy of Sciences, 2019-11-10)
    This was an unusual Nobel prize in that it was awarded ‘for contributions to our understanding of the evolution of the universe and Earth’s place in the cosmos’. This is a broad area which could include almost anything in ...
  • Stellar and Galactic studies with the 2-m Himalayan Chandra Telescope 
    Goswami, A (Societe Royale des Sciences de Liege, 2019-10)
    The Himalayan Chandra Telescope (HCT), of the Indian Astronomical Observatory (IAO), is currently one of the most heavily subscribed telescopes in India. The telescope has been in regular use for scientific observations ...
  • Probing the Galactic s-process nucleosynthesis using barium stars 
    Goswami, A.; Jameela, S (Societe Royale des Sciences de Liege, 2019-10)
    The origin and evolution of neutron-capture elements in our Galaxy is poorly understood. In this work, we have attempted to understand the Galactic s-process nucleosynthesis using barium stars as probes. We have performed ...
  • Optical characterization and Radial velocity monitoring of Exoplanet and Eclipsing Binary candidates 
    Joshi, Y. C; De Cat, P; Panchal, A; Goswami, A; Lampens, P; Vermeylen, L; Maurya, J (Societe Royale des Sciences de Liege, 2019-10)
    In recent times, many new exoplanet and eclipsing binary candidates are reported, particularly from the archival data produced by the Kepler space mission destined to detect exoplanets in the Cygnus-Lyra region of the sky. ...
  • Magnetic activities on active solar-type stars 
    Naik, S; Pandey, J. C; Naik, S; Savanov, I. S; Raj, A. (Societe Royale des Sciences de Liege, 2019-10)
    We present results obtained from the studies of magnetic activities on four solar-type stars (F-type star KIC 6791060, K-type star LO Peg, and two M-type planet-hosting stars K2–33 and EPIC 211901114) by using optical ...
  • REMAP: Determination of the inner edge of the dust torus in AGN by measuring time delays 
    Mandal, A. K; Rakshit, S; Pal, I; Stalin, C. S; Sagar, R; Mathew, B. (Societe Royale des Sciences de Liege, 2019-10)
    Active galactic nuclei (AGN) are high luminosity sources powered by accretion of matter onto super-massive black holes (SMBHs) located at the centres of galaxies. According to the Unification model of AGN, the SMBH is ...
  • Scientific potential of the Indo-Belgian 3.6-m DOT in the field of Galactic Astronomy 
    Sagar, R; Kumar, B; Subramaniam, A (Societe Royale des Sciences de Liege, 2019-10)
    India and Belgium have jointly established two 4-meter class optical telescopes at Devasthal located in Nainital, India. After successful installation of the 3.6-m modern new technology Devasthal Optical Telescope (DOT) ...
  • Simultaneous longitudinal and transverse oscillations in filament threads after a failed eruption 
    Rakesh Mazumder; Vaibhav Pant; Manuel Luna; Dipankar Banerjee (EDP Sciences, 2019-11)
    Longitudinal and transverse oscillations are frequently observed in the solar prominences and / or filaments. These oscilla- tions are excited by a large-scale shock wave, impulsive flares at one leg of the filament ...
  • Full orbital solution for the binary system in the northern Galactic disc microlensing event Gaia16aye 
    Wyrzykowski, L; Mroz, P; Rybicki, K. A; Gromadzki, M; Kolaczkowski, Z; Zielinski, M; Zielinski, P; Britavskiy, N; Gomboc, A; Sokolovsky, K; Hodgkin, S. T; Abe, L; Aldi, G. F; AlMannaei, A; Altavilla, G; Al Qasim, A; Anupama, G. C; Awiphan, S; Bachelet, E; Bakış, V; Baker, S; Bartlett, S; Bendjoya, P; Benson, K; Bikmaev, I. F; Birenbaum, G; Blagorodnova, N; Blanco-Cuaresma, S; Boeva, S; Bonanos, A. Z; Bozza, V; Bramich, D. M; Brun, I; Burenin, R. A; Burgaz, U; Butterley, T; Caines, H. E; Caton, D. B; Calchi Novati, S; Carrasco, J. M; Cassan, A; Cepas, V; Cropper, M; Chruslinska, M; Clementini, G; Clerici, A; Conti, D; Conti, M; Cross, S; Cusano, F; and 134 co-authors (EDP Sciences, 2020-01)
    Gaia16aye was a binary microlensing event discovered in the direction towards the northern Galactic disc and was one of the first microlensing events detected and alerted to by the Gaia space mission. Its light curve ...
  • Long term γ-ray variability of blazars 
    Rajput, Bhoomika; Stalin, C. S; Rakshit, S (EDP Sciences, 2020-02)
    We used the data from the Fermi Gamma-ray Space Telescope to characterise the γ-ray flux variability of blazars on month-like time scales. Our sample consists of 1120 blazars of which 481 are flat spectrum radio quasars ...
  • Disintegration of active asteroid P/2016 G1 (PANSTARRS) 
    Hainaut, O. R; Kleyna, J. T; Meech, K. J; Boslough, Mark; Micheli, Marco; Wainscoat, Richard; Dela Cruz, Marielle; Keane, J. V; Sahu, D. K; Bhatt, B. C (EDP Sciences, 2019-08)
    We report on the catastrophic disintegration of P/2016 G1 (PANSTARRS), an active asteroid, in April 2016. Deep images over three months show that the object is made up of a central concentration of fragments surrounded by ...
  • SIGNALS: I. Survey description 
    Rousseau-Nepton, L; Martin, R. P; Robert, C; Drissen, L; Amram, P; Prunet, S; Martin, T; Moumen, I; Adamo, A; Alarie, A; Barmby, P; Boselli, A; Bresolin, F; Bureau, M; Chemin, L; Fernandes, R. C; Combes, F; Crowder, C; Della Bruna, L; Duarte Puertas, S; Egusa, F; Epinat, B; Ksoll, V. F; Girard, M; Gomez Llanos, V; Gouliermis, D; Grasha, K; Higgs, C; Hlavacek-Larrondo, J; Ho, I.-T; Iglesias-Paramo, J; Joncas, G; Kam, Z. S; Karera, P; Kennicutt, R. C; Klessen, R. S; Lianou, S; Liu, L; Liu, Q; Luiz de Amorim, A; Lyman, J. D; Martel, H; Mazzilli-Ciraulo, B; McLeod, A. F; Melchior, A-L; Millan, I; Molla, M; Momose, R; Morisset, C; Pan, H.-A; Pati, A. K; and 13 co-authors (Oxford University Press on behalf of the Royal Astronomical Society, 2019-11)
    SIGNALS, the Star formation, Ionized Gas, and Nebular Abundances Legacy Survey, is a large observing programme designed to investigate massive star formation and H II regions in a sample of local extended galaxies. The ...
  • The intrinsic reddening of the Magellanic Clouds as traced by background galaxies – I. The bar and outskirts of the Small Magellanic Cloud 
    Bell, C. P. M.; Cioni, Maria-Rosa L; Wright, A. H; Rubele, Stefano; Nidever, David L; Tatton, Ben L; van Loon, Jacco Th; Ivanov, Valentin D; Subramanian, S; Oliveira, J. M; Grijs, Richard de; Pennock, Clara M; Choi, Yumi; Zaritsky, Dennis; Olsen, Knut; Niederhofer, Florian; Choudhury, S; Martinez-Delgado, David; Munoz, R. R (Oxford University Press on behalf of the Royal Astronomical Society, 2019-11)
    We present a method to map the total intrinsic reddening of a foreground extinguishing medium via the analysis of spectral energy distributions (SEDs) of background galaxies. In this pilot study, we implement this technique ...
  • Multiband optical variability of 3C 279 on diverse time-scales 
    Agarwal, A; Cellone, S. A; Andruchow, Ileana; Mammana, Luis; Mridweeka Singh; Anupama, G. C; Mihov, B; Raj, A; Slavcheva-Mihova, L; Ozdonmez, Aykut; Ege, Ergun (Oxford University Press on behalf of the Royal Astronomical Society, 2019-09)
    We have monitored the flat spectrum radio quasar, 3C 279, in the optical B, V, R, and I passbands from 2018 February to 2018 July for 24 nights, with a total of 716 frames, to study flux, colour, and spectral variability ...
  • Tracing the Dynamical Mass in Galaxy Disks Using H i Velocity Dispersion and Its Implications for the Dark Matter Distribution in Galaxies 
    Mousumi Das; McGaugh, S. S; Ianjamasimanana, Roger; Schombert, James; Dwarakanath, K. S (IOP Publishing, 2020-01-20)
    We present a method to derive the dynamical mass of face-on galaxy disks using their neutral hydrogen (H i) velocity dispersion (σ H i ). We have applied the method to nearby, gas-rich galaxies that have extended H i gas ...
  • Flash Ionization Signatures in the Type Ibn Supernova SN 2019uo 
    Gangopadhyay, A; Misra, K; Hiramatsu, D; Wang, Shan-Qin; Hosseinzadeh, G; Wang, Xiaofeng; Valenti, Stefano; Zhang, Jujia; Howel, D. A; Arcavi, Iair; Anupama, G. C; Burke, Jamison; Dastidar, Raya; Koichi Itagaki, Koichi; Kumar, Brajesh; Kumar, B; Li, Long; McCully, Curtis; Mo, Jun; Pandey, S. B; Pellegrino, Craig; Sa, Hanna; Sahu, D. K; Pankaj Sanwal; Singh, A; Singh, M; Zhang, Jicheng; Zhang, Tianmeng; Zhang, Xinhan (IOP Publishing, 2020-02-01)
    We present photometric and spectroscopic observations of the type Ibn supernova (SN) 2019uo, the second ever SN Ibn with flash ionization (He ii, C iii, N iii) features in its early spectra. SN 2019uo displays a rapid ...
  • Optical Transmission Spectra of Hot Jupiters: Effects of Scattering 
    Sengupta, S; Chakrabarty, Aritra; Tinetti, Giovanna (IOP Publishing, 2020-02-01)
    We present new grids of transmission spectra for hot Jupiters by solving the multiple-scattering radiative transfer equations with non-zero scattering albedo instead of using the Beer–Bouguer–Lambert law for the change in ...

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