IIAP Publications: Recent submissions

  • Star clusters in the magellanic clouds-1: parameterisation and classification of 1072 clusters in the LMC 
    Nayak, P. K; Subramaniam, A; Choudhury, S; Indu, G; Sagar, R (Oxford University Press on behalf of the Royal Astronomical Society, 2016-12-01)
    We have introduced a semi-automated quantitative method to estimate the age and reddening of 1072 star clusters in the Large Magellanic Cloud (LMC) using the Optical Gravitational Lensing Experiment III survey data. This ...
  • An excess of mid-infrared emission from the type Iax SN 2014dt 
    Fox, O. D; Johansson, J; Kasliwal, M; Andrews, J; Bally, J; Bond, H. E; Boyer, M. L; Gehrz, R. D; Helou, G; Hsiao, E. Y; Masci, F. J; Parthasarathy, M; Smith, N; Tinyanont, S; Van Dyk, S. D (IOP Publishing, 2016-01)
    Supernovae Type Iax ( SNe Iax ) are less energetic and less luminous than typical thermonuclear explosions. A suggested explanation for the observed characteristics of this subclass is a binary progenitor system ...
  • A low-frequency radio spectropolarimeter for observations of the solar corona 
    Kishore, P; Ramesh, R; Kathiravan, C; Rajalingam, M (Springer, 2015-09)
    A new spectropolarimeter for dedicated ground-based observations of radio emission from the solar corona at low frequencies (<100 MHz) has recently been commissioned at the Gauribidanur Radio Observatory near Bengaluru, ...
  • Abundance analysis of s-process enhanced barium stars 
    Mahanta, Upakul; Drisya, K; Goswami, A; Duorah, K (Oxford University Press on behalf of the Royal Astronomical Society, 2016-12-01)
    Detailed chemical composition studies of stars with enhanced abundances of neutron-capture elements can provide observational constraints for neutron-capture nucleosynthesis studies and clues for understanding their ...
  • Observations of near-simultaneous split-band solar type-II radio bursts at low frequencies 
    Hariharan, K; Ramesh, R; Kathiravan, C (Springer, 2015-09)
    We report ground-based radio spectral and polarimeter observations of two successive split-band Type-II bursts that occurred on 20 February 2014 at low frequencies (<100 MHz) in association with a solar coronal mass ejection ...
  • Detection of high-frequency oscillations and damping from multi-slit spectroscopic observations of the corona 
    Samanta, T; Singh, J; Sindhuja, G; Banerjee, D (Springer, 2016-01)
    During the total solar eclipse of 11 July 2010, multi-slit spectroscopic observations of the solar corona were performed from Easter Island, Chile. To search for highfrequency waves, observations were taken at a high cadence ...
  • Detection of molecular gas in void galaxies: implications for star formation in isolated environments 
    Mousumi Das; Saito, T; Iono, D; Honey, M; Ramya, S (IOP Publishing, 2015-12-10)
    We present the detection of molecular gas from galaxies located in nearby voids using the CO(1–0) line emission as a tracer. The observations were performed using the 45 m single dish radio telescope of the Nobeyama Radio ...
  • Horizontal flows in active regions from ring-diagram and local correlation tracking methods 
    Jain, K; Tripathy, S. C; Ravindra, B; Komm, R; Hill, F (IOP Publishing, 2016-01)
    Continuous high-cadence and high spatial resolution Dopplergrams allow us to study subsurface dynamics that may be further extended to explore precursors of visible solar activity on the surface. Since the p -mode ...
  • Propagating disturbances in the solar corona and spicular connection 
    Samanta, T; Pant, V; Banerjee, D (IOP Publishing, 2015-12-10)
    Spicules are small, hairy-like structures seen at the solar limb, mainly at chromospheric and transition region lines. They generally live for 3–10 minutes. We study these spicules in a south polar region of the Sun with ...
  • Star-forming, rotating spheroidal galaxies in the GAMA and SAMI surveys 
    Moffett, A. J; Phillipps, S; Robotham, A.S.G; Driver, S.P; Bremer, M.N; Cortese, L; Ivy Wong, O; Brough, S; Brown, Michael J. I; Bryant, Julia J; Conselice, Christopher J; Croom, Scott M; George, K; Goldstein, Greg; Goodwin, Michael; Holwerda, B.W; Hopkins, A.M; Konstantopoulos, I. S; Lawrence, J.S; Lorente, N.P.F; Medling, A. M; Owers, M.S; Pimbblet, K. A; Richards, S.N; Sweet, S. M; Van de Sande, J (Oxford University Press on behalf of the Royal Astronomical Society, 2019-08-12)
    The Galaxy And Mass Assembly (GAMA) survey has morphologically identified a class of ‘Little Blue Spheroid’ (LBS) galaxies whose relationship to other classes of galaxies we now examine in detail. Considering a sample of ...
  • Direct estimates of the solar coronal magnetic field using contemporaneous extremeultraviolet, radio, and white-light observations 
    Anshu Kumari; Ramesh, R; Kathiravan, C; Wang, T. J; Gopalswamy, N (IOP Publishing, 2019-08-10)
    We report a solar coronal split-band type II radio burst that was observed on 2016 March 16 with the Gauribidanur Radio Spectro-Polarimeter in the frequency range ≈90–50 MHz, and the Gauribidanur RadioheliograPH at two ...
  • Search for low-mass objects in the globular cluster M4. I. detection of variable stars 
    Safonova, M; Mkrtichian, D; Hasan, P; Sutaria, F. K; Brosch, N; Gorbikov, E; Joseph, P (IOP Publishing, 2016-02)
    With every new discovery of an extrasolar planet, the absence of planets in globular clusters ( GCs ) becomes more and more conspicuous. Null detection of transiting hot Jupiters in GCs 47 Tuc, ω Cen, and NGC 6397 ...
  • Astronomical site survey report on dust measurement, wind profile, optical turbulence, and their correlation with seeing over IAO-Hanle 
    Shantikumar, S. N; Kathiravan, S; Parihar, P. S; Larson, E. J. L; Sharika Mohanan; Angchuk, D; Jorphel, Sonam; Rangarajan, K. E; Prabhu, K (Springer Netherlands, 2017-04)
    The present work discusses astronomical site survey reports on dust content, vertical distribution of atmospheric turbulence, precipitable water vapor (PWV), surface and upper-air data, and their effects on seeing over the ...
  • Solar dynamics imaging system a back-end instrument for the proposed NLST 
    Ramesh, K. B; Vasantharaju, N; Hemanth, P; Reardon, K (Springer, 2016-12)
    The Solar Dynamics Imaging System (SDIS) will be one of the focal plane instruments operated at the National Large Solar Telescope (NLST). The prime objective of the instrument is to obtain high spatial and temporal ...
  • Validation of water vapor retrieval from Moderate Resolution Imaging Spectro-radiometer (MODIS) in near infrared channels using GPS data over IAO-Hanle, in the trans-Himalayan region 
    Shantikumar, N. S; Jade, S; Shrungeshwara, T. S; Song, H.-J (Elsevier B.V, 2016-01)
    Integrated precipitable water vapor (PWV) retrieved from Moderate Resolution Imaging Spectro-radiometer (MODIS) in near-infrared channels is examined with the PWV estimated from the Global Positioning System (GPS) data and ...
  • Extragalactic survey using GALEX–spitzer matching fields 
    Bose, L. S; Sujatha, N. V; Narayanankutty, K; Murthy, J (Pleiades Publishing, 2015-12)
    We have used Spitzer observations of galaxies in the ELAIS-N1 region centered at 16h10m01s, +54◦30′36″ to extend the effective sensitivity of GALEX UV observations of the same region. Spitzer is more sensitive to external ...
  • Observational Signature of Circumstellar Interaction and 56Ni-mixing in the Type II Supernova 2016gfy 
    Singh, A; Brajesh Kumar; Moriya, Takashi J; Anupama, G. C; Sahu, D. K; Brown, Peter J; Andrews, Jennifer E; Smith, Nathan (IOP Publishing, 2019-09-01)
    The optical and ultraviolet broadband photometric and spectroscopic observations of the Type II supernova (SN) 2016gfy are presented. The V-band light curve (LC) shows a distinct plateau phase with a slope of s2 ∼ 0.12 mag ...
  • Dissecting galaxies: spatial and spectral separation of emission excited by star formation and AGN activity 
    Davies, R. L; Groves, B; Kewley, L; Dopita, M. A; Hampton, E. J; Shastri, P; Scharwachter, J; Sutherland, R; Kharb, P; Bhatt, H. C; Jin, C; Banfield, J; Zaw, I; James, B; Juneau, S; Srivastava, S (Oxford University Press on behalf of the Royal Astronomical Society, 2016-10-21)
    The optical spectra of Seyfert galaxies are often dominated by emission lines excited by both star formation and active galactic nucleus (AGN) activity. Standard calibrations (such as for the star formation rate) are not ...
  • SPIRITS: Uncovering Unusual Infrared Transients with Spitzer 
    Kasliwal, M. M; Bally, J; Masci, F; Cody, Ann Marie; Bond, H. E; Jencson, Jacob E; Tinyanont, S; Cao, Y; Contreras, C; Dykhoff, Devin A; Amodeo, Samuel; Armus, L; Boyer, Martha; Cantiello, Matteo; Carlon, Robert L; Cass, Alexander C; Cook, David; Corgan, David T; Faella, Joseph; Fox, O. D; Green, Wayne; Gehrz, R. D; Helou, G; Hsiao, Eric; Johansson, J; Khan, Rubab M; Lau, Ryan M; Langer, Norbert; Levesque, Emily; Milne, Peter; Mohamed, Shazrene; Morrell, N; Monson, Andy; Moore, Anna; Ofek, E. O; O' Sullivan, Donal; Parthasarathy, M; Perez, Andres; Perley, D. A; Phillips, Mark; Prince, Thomas A; Shenoy, Dinesh; Smith, Nathan; Surace, J; Van Dyk, Schuyler D; Whitelock, P. A; Williams, Robert (IOP Publishing, 2017-04-20)
    We present an ongoing, five-year systematic search for extragalactic infrared transients, dubbed SPIRITS—SPitzer InfraRed Intensive Transients Survey. In the first year, using Spitzer/IRAC, we searched 190 nearby galaxies ...
  • Significance of bar quenching in the global quenching of star formation 
    George, K; Subramanian, S; Paul, K. T (EDP Sciences, 2019-08)
    The suppression of star formation in the inner kiloparsec regions of barred disk galaxies due to the action of bars is known as bar quenching. We investigate here the significance of bar quenching in the global quenching ...

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