IIAP Publications: Recent submissions

  • Ionized Gas in Elliptical Galaxies 
    Singh, K. P; Prabhu, T. P; Kembhavi, A. K; Bhat, P. N (Indian Academy of Sciences, 1995-06)
    We report observations of H alpha nebulosities in the X-ray bright elliptical galaxies which are members of nearby groups of galaxies or clusters. Our sample includes NGC 1399, NGC 1600, NGC 2563, NGC 3607, NGC 4203, ...
  • MARVELS-1b: A Short-period, Brown Dwarf Desert Candidate from the SDSS-III Marvels Planet Search 
    Lee, B. L; Ge, J; Fleming, S. W; Stassun, K. G; Gaudi, B. S; Barnes, R; Mahadevan, S; Eastman, J. D; Wright, J; Siverd, R. J; Gary, B; Ghezzi, L; Laws, C; Wisniewski, J. P; Porto de Mello, G. F; Ogando, R. L. C; Maia, M. A. G; Nicolaci da Costa, L; Sivarani, T; Pepper, J; Cuong Nguyen, D; Hebb, L; De Lee, N; Wang, J; Wan, X; Chang, L; Groot, J; Varosi, F; Hearty, F; Hanna, K; van Eyken, J. C; Kane, S. R; Agol, E; Bizyaev, D; Bochanski, J. J; Brewington, H; Chen, Z; Costello, E; Dou, L; Eisenstein, D. J; Fletcher, A; Ford, E. B; Guo, P; Holtzman, J. A; Jiang, P; French Leger, R; Liu, J; Long, D. C; Malanushenko, E; Malanushenko, V; Malik, M; Oravetz, D; Pan, K; Rohan, P; Schneider, D. P; Shelden, A; Snedden, S. A; Simmons, A; Weaver, B. A; Weinberg, D. H; Xie, J (IOP Publishing, 2011-02)
    We present a new short-period brown dwarf (BD) candidate around the star TYC 1240-00945-1. This candidate was discovered in the first year of the Multi-object APO Radial Velocity Exoplanets Large-area Survey (MARVELS), ...
  • Evidence for OI 630.0 nm dayglow variations over low latitudes during onset of a substorm 
    Chakrabarty, D; Sekar, R; Sastri, J. H; Pathan, B. M; Reeves, G. D; Yumoto, K; Kikuchi, T (American Geophysical Union, 2010-10)
    Observations of OI 630.0 nm dayglow intensity from Mt. Abu (magnetic latitude (MLAT): 16.2°N; magnetic longitude (MLONG): 148°E) at two different directions corresponding to two different magnetic latitudes (MLATZenith: ...
  • Variable circumstellar activity of V351 Orionis 
    Choudhury, R; Bhatt, H. C; Pandey, G (EDP Sciences, 2011-02)
    Context. Emission and absorption line profiles which are formed in the interaction of pre-main sequence stars and their circumstellar environment are found to be variable at various timescales. Aims. We investigate the ...
  • Lithium abundances in the α Per cluster 
    Balachandran, S. C; Mallik, S. G. V; Lambert, D. L (Wiley Blackwell, 2011-02)
    Lithium (Li) abundances are presented and discussed for 70 members of the 50-Myr-old open cluster α Per. More than half of the abundances are from new high-resolution spectra. The Li abundance in the F-type stars is equal ...
  • Sensitivity of the Calculated g-Mode Frequencies to Pulsation Codes and their Parameters 
    Moya, A; Mathur, S; García, R. A (Springer, 2011-02)
    From the recent work of the Evolution and Seismic Tools Activity (ESTA: Monteiro et al., ESA, SP-1306, 363 – 371, 2006 and Lebreton et al., Astrophys. Space Sci. 316, 1 – 12, 2008), whose Task 2 is devoted to comparing ...
  • Are C60 Molecules Detectable in Circumstellar Shells of R Coronae Borealis Stars? 
    García-Hernández, D. A; Kameswara Rao, N; Lambert, D. L (IOP Publishing, 2011-03-10)
    The hydrogen-poor, helium-rich, and carbon-rich character of the gas around R Coronae Borealis (RCB) stars has been suggested to be a site for formation of C60 molecules. This suggestion is not supported by observations ...
  • First stars. XIII. Two extremely metal-poor RR Lyrae stars 
    Hansen, C. J; Nordström, B; Bonifacio, P; Spite, M; Andersen, J; Beers, T. C; Cayrel, R; Spite, F; Molaro, P; Barbuy, B; Depagne, E; François, P; Hill, V; Plez, B; Sivarani, T (EDP Sciences, 2011-03)
    Context. The chemical composition of extremely metal-poor stars (EMP stars; [Fe/H] < ~ −3) is a unique tracer of early nucleosynthesis in the Galaxy. As such stars are rare, we wish to find classes of luminous stars ...
  • The SEGUE Stellar Parameter Pipeline. V. Estimation of Alpha-element Abundance Ratios from Low-resolution SDSS/SEGUE Stellar Spectra 
    Lee, Y. S; Beers, T. C; Prieto, C. A; Lai, D. K; Rockosi, C. M; Morrison, H. L; Johnson, J. A; An, D; Sivarani, T; Yanny, B (IOP Publishing, 2011-03)
    We present a method for the determination of [α/Fe] ratios from low-resolution (R = 2000) SDSS/SEGUE stellar spectra. By means of a star-by-star comparison with degraded spectra from the ELODIE spectral library and with a ...
  • [O/Fe] Estimates for Carbon-enhanced Metal-poor Stars from Near-infrared Spectroscopy 
    Kennedy, C. R; Sivarani, T; Beers, T. C; Lee, Y. S; Placco, V. M; Rossi, S; Christlieb, N; Herwig, F; Plez, B (IOP Publishing, 2011-03)
    We report on oxygen abundances determined from medium-resolution near-infrared spectroscopy for a sample of 57 carbon-enhanced metal-poor (CEMP) stars selected from the Hamburg/ESO Survey. The majority of our program stars ...
  • Propagating intensity disturbances in polar corona as seen from AIA/SDO 
    Krishna Prasad, S; Banerjee, D; Gupta, G. R (EDP Sciences, 2011-04)
    Context. Polar corona is often explored to find the energy source for the acceleration of the fast solar wind. Earlier observations show omni-presence of quasi-periodic disturbances, traveling outward, which is believed ...
  • Crustal structure of the Darjeeling-Sikkim Himalaya and southern Tibet 
    Acton, C. E; Priestley, K; Mitra, S; Gaur, V. K (Wiley Blackwell, 2011-02)
    Analysis of data from nine, temporary broadband seismic stations operated across West Bengal and Sikkim, along with publicly available data from seismographs in the surrounding region, provides the first image of the ...
  • Homogeneous photospheric parameters and C abundances in G and K nearby stars with and without planets 
    da Silva, R; Milone, A. C; Reddy, B. E (EDP Sciences, 2011-02)
    Aims. We present a determination of photospheric parameters and carbon abundances for a sample of 172 G and K dwarf, subgiant, and giant stars with and without detected planets in the solar neighbourhood. The analysis was ...
  • The SEGUE Stellar Parameter Pipeline. IV. Validation with an Extended Sample of Galactic Globular and Open Clusters 
    Smolinski, J. P; Lee, Y. S; Beers, T. C; An, D; Bickerton, S. J; Johnson, J. A; Loomis, C. P; Rockosi, C. M; Sivarani, T; Yanny, B (IOP Publishing, 2011-03)
    Spectroscopic and photometric data for likely member stars of five Galactic globular clusters (M3, M53, M71, M92, and NGC 5053) and three open clusters (M35, NGC 2158, and NGC 6791) are processed by the current version of ...
  • Determination of molecular hyperfine-structure constant using the second-order relativistic many-body perturbation theory 
    Nayak, M. K; Chaudhuri, R. K (American Physical Society, 2011-02)
    The spin-rotational Hamiltonian parameters A∥ and A⊥ for the BaF molecule are calculated using four-component relativistic spinors at the second-order many-body perturbation theory (MBPT) level via the Z-vector technique. ...
  • Comparison of energies between eruptive phenomena and magnetic field in AR 10930 
    Ravindra, B; Howard, T. A (Astronomical Society of India, 2010-12)
    We present a study comparing the energy carried away by a coronal mass ejection (CME) and the radiative energy loss in associated flare plasma, with the decrease in magnetic free energy during a release in active region ...
  • Thermal characteristics of a classical solar telescope primary mirror 
    Banyal, R. K; Ravindra, B (Elsevier B.V., 2011-08)
    We present a detailed thermal and structural analysis of a 2 m class solar telescope mirror which is subjected to a varying heat load at an observatory site. A 3-dimensional heat transfer model of the mirror takes into ...
  • Radio Continuum and H I Study of Blue Compact Dwarf Galaxies 
    Ramya, S; Kantharia, N. G; Prabhu, T. P (IOP Publishing, 2011-02)
    The multifrequency radio continuum and 21 cm H I observations of five blue compact dwarf (BCD) galaxies, Mrk 104, Mrk 108, Mrk 1039, Mrk 1069, and I Zw 97, using the Giant Meterwave Radio Telescope (GMRT) are presented ...
  • Seismic rays, satellites and sea winds 
    Gaur, V. K; Sujata Varadarajan (Indian Academy of Sciences, 2010-11)
    This section features conversations with personalities related to science, highlighting the factors and circumstances that guided them in making the career choice to be a scientist
  • A critique on Drexler dark matter 
    Sivaram, C; Arun, K; Nagaraja, R (Springer, 2011-05)
    Drexler dark matter is an alternate approach to dark matter that assumes that highly relativistic protons trapped in the halo of the galaxies could account for the missing mass. We look at various energetics involved in ...

Search DSpace


Browse

My Account