IIAP Publications: Recent submissions

  • A multiwavelength census of stellar contents in the young cluster NGC 1624 
    Jose, J; Pandey, A. K; Ogura, K; Ojha, D. K; Bhatt, B. C; Samal, M. R; Chauhan, N; Sahu, D. K; Rawat, P. S (Wiley-Blackwell, 2011-03)
    We present a comprehensive multiwavelength analysis of the young cluster NGC 1624 associated with the H ii region Sh2-212 using optical UBVRI photometry, optical spectroscopy and GMRT radio continuum mapping along with the ...
  • On the propensity of the formation of massive clumps via fragmentation of driven shells 
    Anathpindika, S (Elsevier B.V., 2011-08)
    Early type massive stars drive thin, dense shells whose edges often show evidence of star-formation. The possibility of fragmentation of these shells, leading to the formation of putative star-forming clumps is examined ...
  • Radio Observations of the Solar Corona During an Eclipse 
    Kathiravan, C; Ramesh, R; Barve, Indrajit V; Rajalingam, M (Institute of Physics Publishing, 2011-04-01)
    We carried out radio observations of the solar corona at 170 MHz during the eclipse of 2008 August 1, from the Gauribidanur observatory located about 100 km north of Bangalore in India. The results indicate the presence ...
  • Origin of Lithium Enrichment in K Giants 
    Bharat Kumar, Y; Reddy, B. E; Lambert, D. L (Institute of Physics Publishing, 2011-03-20)
    In this Letter, we report on a low-resolution spectroscopic survey for Li-rich K giants among 2000 low-mass (M ≤ 3 M sun) giants spanning the luminosity range from below to above the luminosity of the clump. Fifteen new ...
  • On the Sensitivity of Partial Redistribution Scattering Polarization Profiles to Various Atmospheric Parameters 
    Sampoorna, M; Trujillo Bueno, J; Landi Degl'Innocenti, E (IOP Publishing, 2010-10)
    This paper presents a detailed study of the scattering polarization profiles formed under partial frequency redistribution (PRD) in two thermal models of the solar atmosphere. Particular attention is given to understanding ...
  • Cosmochemistry: A Perspective 
    Goswami, A (Springer, 2010)
    Cosmochemistry can be said to aim at constructing a quantitative and continuous history of chemical evolution of our universe starting from appearance of hydrogenic matter immediately after the Big Bang. While the main ...
  • The Optical Spectrum of Nova Cygni 1992 
    Anupama, G. C; Prabhu, T. P (Institute of Physics Publishing, 1993)
    Spectroscopy of the ONeMg nova Cygni 1992 is presented, based on data obtained at the Vainu Bappu Observatory between 1992 March l3-May 22 and 1993 January 3. Spectra were obtained at five epochs- epoch I: 1992 March 13-14, ...
  • Spectral line polarization with angle-dependent partial frequency redistribution. II. Accelerated lambda iteration and scattering expansion methods for the Rayleigh scattering 
    Sampoorna, M; Nagendra, K. N; Frisch, H (EDP Sciences, 2011-03)
    Context. The linear polarization of strong resonance lines observed in the solar spectrum is created by the scattering of the photospheric radiation field. This polarization is sensitive to the form of the partial frequency ...
  • Spectral Classification: Old and Contemporary 
    Giridhar, S (Springer, 2010)
    Beginning with a historical account of the spectral classification, its refinement through additional criteria is presented. The line strengths and ratios used in two dimensional classifications of each spectral class are ...
  • Supernova 1991T in NGC 4527 
    Sivaraman, K. R; Prabhu, T. P; Anupama, G. C; Schmeer, P; Smith, H; Royer, R; Lubcke, G; Villi, M; Cortini, G (Smithsonian Astrophysical Observatory, 1991-04)
  • Nova Herculis 1991 
    Iijima, T; Gehrz, R. D; Jones, T. J; Lawrence, G; Sivaraman, K. R; Prabhu, T. P; Ghosh, K. K; Anupama, G. C; Selvakumar, G (Smithsonian Astrophysical Observatory, 1991-04)
  • 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 ...

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