IIAP Publications: Recent submissions

  • Very Low Mass Stellar and Substellar Companions to Solar-like Stars from MARVELS. IV. A Candidate Brown Dwarf or Low-mass Stellar Companion to HIP 67526 
    Jiang, P; Ge, J; Cargile, P; Crepp, J. R; De Lee, N; Porto de Mello, G. F; Esposito, M.; Ferreira, L. D; Femenia, B; Fleming, S. W; Gaudi, B. S; Ghezzi, L; Gonzalez Hernandez, J. I; Hebb, L; Lee, B. L; Ma, Bo; Stassun, K. G; Wang, Ji; Wisniewski, John P; Agol, Eric; Bizyaev, Dmitry; Brewington, Howard; Chang, Liang; Nicolaci da Costa, Luiz; Eastman, Jason D; Ebelke, Garrett; Gary, Bruce; Kane, Stephen R; Li, Rui; Liu, Jian; Mahadevan, Suvrath; Maia, Marcio A. G; Malanushenko, Viktor; Malanushenko, Elena; Muna, Demitri; Nguyen, Duy Cuong; Ogando, Ricardo L. C; Oravetz, Audrey; Oravetz, Daniel; Pan, Kaike; Pepper, Joshua; Paegert, Martin; Allende Prieto, Carlos; Rebolo, Rafael; Santiago, Basilio X; Schneider, Donald P; Shelden Bradley, Alaina C; Sivarani, T; Snedden, Stephanie; van Eyken, J. C; Wan, Xiaoke; Weaver, Benjamin A; Zhao, Bo (IOP Publishing, 2013-09)
    We report the discovery of a candidate brown dwarf (BD) or a very low mass stellar companion (MARVELS-5b) to the star HIP 67526 from the Multi-object Apache point observatory Radial Velocity Exoplanet Large-area Survey ...
  • The Progenitor of SN 2011ja: Clues from Circumstellar Interaction 
    Chakraborti, S; Ray, A; Smith, R; Ryder, S; Yadav, N; Sutaria, F. K; Dwarkadas, V. V; Chandra, P; Pooley, D; Roy, R (IOP Publishing, 2013-09-01)
    Massive stars, possibly red supergiants, which retain extended hydrogen envelopes until core collapse, produce Type II plateau (IIP) supernovae. The ejecta from these explosions shocks the circumstellar matter originating ...
  • Holography, dark energy and entropy of large cosmic structures 
    Sivaram, C; Arun, K (Springer, 2013-11)
    As is well known, black hole entropy is proportional to the area of the horizon suggesting a holographic principle wherein all degrees of freedom contributing to the entropy reside on the surface. In this note, we point ...
  • Identification of metal-poor stars using the artificial neural network 
    Giridhar, S; Goswami, A; Kunder, A; Muneer, S; Selvakumar, G (EDP Sciences, 2013-08)
    Context. Identification of metal-poor stars among field stars is extremely useful for studying the structure and evolution of the Galaxy and of external galaxies. Aims. We search for metal-poor stars using the artificial ...
  • A study of the starless dark cloud LDN 1570: Distance, dust properties, and magnetic field geometry 
    Eswaraiah, C; Maheswar, G; Pandey, A. K; Jose, J; Ramaprakash, A. N; Bhatt, H. C (EDP Sciences, 2013-08)
    Aims. We aim to map the magnetic field geometry and to study the dust properties of the starless cloud, L1570, using multi-wavelength optical polarimetry and photometry of the stars projected on the cloud. Methods. The ...
  • Dust Around R Coronae Borealis Stars. II. Infrared Emission Features in an H-poor Environment 
    Garcia-Hernandez, D. A; Kameswara Rao, N; Lambert, D. L (IOP Publishing, 2013-08-20)
    Residual Spitzer/Infrared Spectrograph spectra for a sample of 31 R Coronae Borealis (RCB) stars are presented and discussed in terms of narrow emission features superimposed on the quasi-blackbody continuous infrared ...
  • Velocities and linewidths in the network and cell interiors of a polar coronal hole compared with the quiet Sun 
    Raju, K. P; Bromage, B. J. I (Springer, 2014-03)
    The relative Doppler velocities and linewidths in a polar coronal hole and the nearby quiet-Sun region have been obtained from the Solar and Heliospheric Observatory (SOHO)/Coronal Diagnostic Spectrometer (CDS) observations ...
  • A Comparison of Solar Cycle Variations in the Equatorial Rotation Rates of the Sun's Subsurface, Surface, Corona, and Sunspot Groups 
    Javaraiah, J (Springer, 2013-10)
    Using the Solar Optical Observing Network (SOON) sunspot-group data for the period 1985 – 2010, the variations in the annual mean equatorial-rotation rates of the sunspot groups are determined and compared with the known ...
  • Radiative Transfer Modelling of Dust in IRAS 18333–2357: The only planetary nebula in the metal-poor globular cluster M22 
    Muthumariappan, C; Parthasarathy, M; Ita, Y (Oxford University Press on behalf of the Royal Astronomical Society, 2013-10-11)
    We report results from our 1-D radiative transfer modelling of dust in the hydrogen-deficient planetary nebula IRAS 18333–2357 located in the globular cluster M22. A spectral energy distribution was constructed from ...
  • Seismology of the Sun: Inference of Thermal, Dynamic and Magnetic Field Structures of the Interior 
    Hiremath, K. M (Springer, 2013-08)
    Recent overwhelming evidences show that the sun strongly influences the Earth’s climate and environment. Moreover existence of life on this Earth mainly depends upon the sun’s energy. Hence, understanding of physics of the ...
  • Mapping extinction using GALEX and SDSS photometric observations 
    Preethi, K; Gudennavar, S. B; Murthy, J (American Institute of Physics, 2013-06)
    The primary objective of this work is to create an all sky extinction map of the Milky Way galaxy. We have cross-matched the Sloan Digital Sky Survey (SDSS data release 8) photometric observations with that of Galaxy ...
  • Depletion Studies in the Interstellar Medium 
    Haris, U; Parvathi, V. S; Gudennavar, S. B; Murthy, J (American Institute of Physics, 2013-06)
    We report interstellar Si depletion and dust-phase column densities of Si along 131 Galactic sight lines using previously reported gas-phase Si II column densities, after correcting for the differences in oscillator ...
  • A detailed census of variable stars in the globular cluster NGC 6333 (M9) from CCD differential photometry 
    Arellano Ferro, A; Bramich, D. M; Jaimes, R. F; Giridhar, S; Kains, N; Kuppuswamy, K; Jorgensen, U. G; Alsubai, K. A; Andersen, J. M; Bozza, V; Browne, P; Novati, S. C; Damerdji, Y; Diehl, C; Dominik, M; Dreizler, S; Elyiv, A; Giannini, E; Harpsoe, K; Hessman, F. V; Hinse, T. C; Hundertmark, M; Juncher, D; Kerins, E; Korhonen, H; Liebig, C; Mancini, L; Mathiasen, M; Penny, M. T; Rabus, M; Rahvar, S; Ricci, D; Scarpetta, G; Skottfelt, J; Snodgrass, C; Southworth, J; Surdej, J; Tregloan-Reed, J; Vilela, C; Wertz, O (Oxford University Press on behalf of the Royal Astronomical Society, 2013-09-11)
    We report CCD V and I time series photometry of the globular cluster NGC 6333 (M9). The technique of difference image analysis has been used, which enables photometric precision better than 0.05 mag for stars brighter than ...
  • Betti Numbers of Gaussian fields 
    Park, C; Pranav, P; Pravabati, C; Weygaert, R; Jones, B; Vegter, G; Kim, I; Hidding, J; Hellwing, W. A (The Korean Astronomical Society, 2013-06)
    We present the relation between the genus in cosmology and the Betti numbers for excursion sets of three- and two-dimensional smooth Gaussian random fields, and numerically investigate the Betti numbers as a function of ...
  • Photoelectric observations of V Crateris 
    Sanwal, N. B; Sarma, M. B. K; Vivekanand Rao, P; Parthasarathy, M (Osmania University, 1990-03)
    The short-period eclipsing binary V Crateris is observed in the B and V colors of Johnson and Morgan's UBV system with attention given to the results from comparison and check stars. Magnitude differences are listed, and ...
  • Acoustic Emission From Magnetic Flux Tubes in the Solar Network 
    Vigeesh, G; Hasan, S. S (IOP Publishing, 2013)
    We present the results of three-dimensional numerical simulations to investigate the excitation of waves in the magnetic network of the Sun due to foot point motions of a magnetic flux tube. We consider motions that typically ...
  • Near-Infrared Spectra of Some Symbiotic Stars 
    Kamath, U. S; Ashok, N. M (Astronomical Society of the Pacific, 2003)
  • Cooler and Hotter X-ray Bright Points from Hinode/XRT Observations 
    Kariyappa, R; DeLuca, E. E; Saar, S. H; Golub, L; Dame, L; Varghese, B. A (Astronomical Society of the Pacific, 2012-08)
    We use a 7-hour (17:00 UT - 24:00 UT) time sequence of soft X-ray images observed almost simultaneously in two filters (Ti_poly and Al_mesh) on April 14, 2007 with X-Ray Telescope (XRT) on-board the Hinode mission to ...
  • Analysing Solar‐like Oscillations with an Automatic Pipeline 
    Mathur, S; Garcia, R. A; Regulo, C; Ballot, J; Salabert, D; Chaplin, W. J (American Institute of Physics, 2009)
    The Kepler mission will provide a huge amount of asteroseismic data during the next few years, among which hundreds of solar‐like stars will be targeted. The amount of stars and their observation length represent a step ...
  • GOLF: A New Proxy for Solar Magnetism 
    Mathur, S; Jimenez-Reyes, S. J; Garcia, R. A (GOLF: A New Proxy for Solar Magnetism, 2009)
    Solar magnetism is measured with different indices: for instance the Magnetic Plage Solar Index (MPSI) and the Mount Wilson Sunspot Index (MWSI), number of sunspots, radio flux at 10.7 cm, Ca II K, Mg II K, EUV, He I or ...

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