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Browsing by Subject "Stars: Late-type"

Browsing by Subject "Stars: Late-type"

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  • Chemical analysis of CH stars – II. Atmospheric parameters and elemental abundances 
    Drisya, K; Goswami, A (Oxford University Press on behalf of the Royal Astronomical Society, 2015-01-21)
    We present detailed chemical analyses for a sample of 12 stars selected from the CH star catalogue of Bartkevicius. The sample includes two confirmed binaries, four objects that are known to show radial velocity variations ...
  • Chemical analysis of three barium stars: HD 51959, HD 88035, HD 121447 
    Drisya, K; Goswami, A; Sridhar, N; Masseron, T; Meenakshi, P (Oxford University Press on behalf of the Royal Astronomical Society, 2018-05)
    We present elemental abundance results from high-resolution spectral analysis of three nitrogen-enhanced barium stars. The analysis is based on spectra obtained with the fibre- fed extended range optical spectrograph ...
  • Chromospheric activity in cool stars and the lithium abundance 
    Mallik, S. G. V (The European Southern Observatory, 1998-10)
    A detailed analysis of the Ca II triplet lines lkern -4.1ptlower2pt char19 kern -0.8ptambdalkern -4.1ptlower2pt char19 kern -0.8ptambda8498, 8542, 8662 in 146 cool stars of all luminosities spanning a large range in ...
  • Spectral classification of unidentified IRAS sources with F{_nu }(12 μm) >= F{_nu }(25 μm) 
    Iyengar, K. V. K; MacConnell, D. J (The European Southern Observatory, 1998-12)
    Spectral types of a large number of unidentified IRAS Point Sources with F{_nu }(12 μm) >= F{_nu }(25 μm) were determined; the majority are faint, oxygen-rich (M-type) or carbon-rich giant stars. The Guide Star Catalog has ...
  • Spectroscopic charaterization of FHLC stars from the Hamburg/ESO survey and a newly found HdC star 
    Goswami, A (Astronomical Society of India, 2012)
    The sample of candidate faint high latitude carbon (FHLC) stars chosen from the Hamburg/ESO survey is a potential source to search for objects of rare types. From medium resolution spectral analyses of about 250 objects ...
  • V, I CCD photometry of metal-rich bulge globular clusters: NGC 6553 
    Sagar, R; Subramaniam, A; Richtler, T; Grebel, E. K (The European Southern Observatory, 1999-03)
    We have carried out VI CCD photometry of about 40 000 stars down to V ~ 23 mag in an area of about 6' x 10' centered on the metal-rich Galactic bulge globular cluster NGC 6553 and an adjacent field region. Our photometry ...

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