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J/ApJ/530/783     The r-process enriched giant HD 115444    (Westin+, 2000)
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The r-Process-enriched Low-Metallicity Giant HD 115444
    Westin J., Sneden C., Gustafsson B., Cowan J.J.
   <Astrophys. J. 530, 783 (2000)>
   =2000ApJ...530..783W
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ADC_Keywords: Spectroscopy ; Stars, population II
Keywords: Galaxy: halo - nuclear reactions, nucleosynthesis,
          abundances - stars: abundances - stars: Population II

Abstract:
    New high-resolution, very high signal-to-noise spectra of
    ultrametal-poor (UMP) giant stars HD 115444 and HD 122563 have been
    gathered with the High-Resolution Echelle Spectrometer of the McDonald
    Observatory 2.7 m telescope. With these spectra, line identification
    and model atmosphere analyses have been conducted, emphasizing the
    neutron-capture elements. Twenty elements with Z > 30 have been
    identified in the spectrum of HD 115444. This star is known to have
    overabundances of the neutron-capture elements, but it has lacked a
    detailed analysis necessary to compare with nucleosynthesis
    predictions. The new study features a line-by-line differential
    abundance comparison of HD 115444 with the bright, well-studied halo
    giant HD 122563.

Objects:
    ---------------------------------------------------------
       RA   (2000)   DE    Designation(s)
    ---------------------------------------------------------
    13 16 42.5   +36 22 53 HD 115444 = SAO 63442 = HIP 64786
    14 02 31.9   +09 41 10 HD 122563 = SAO 120251 = HIP 68594
    ---------------------------------------------------------

File Summary:
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 FileName      Lrecl  Records   Explanations
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ReadMe            80        .   This file
table2.dat        56      346   Equivalent widths of observed stars
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See also:
   J/A+A/300/751 : Metal-poor stars spectroscopy. II (Axer+, 1995)
   J/A+A/287/927 : Abundances for lines of n-capture in 19 stars (Gratton+ 1994)

Byte-by-byte Description of file: table2.dat
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   Bytes Format Units   Label     Explanations
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   1-  7  F7.2  0.1nm   Wave      ? Wavelength of line
   9- 15  A7    ---     Feature   Observed ion line or molecular band
  17- 20  F4.2  eV      ExPot     ? Excitation potential of the ion
  25- 30  F6.3  [-]     Log(gf)   ? Log of the oscillator strength
  33- 37  F5.1  0.1nm   EqW122    ? Equivalent Width of HD 122563
  40- 42  A3    ---   f_EqW122    Flag indicating line analyzed with
                                   synthetic spectra
  47- 51  F5.1  0.1nm   EqW115    ? Equivalent Width of HD 115444
  54- 56  A3    ---   f_EqW115    Flag indicating line analyzed with
                                   synthetic spectra
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History:
    From ApJ electronic edition
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(End)                                          Greg Schwarz [AAS]    27-Apr-2000