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J/MNRAS/404/253  Heavy element abundances in HD 209621          (Goswami+, 2010)
HD 209621: abundances of neutron-capture elements.
    Goswami A., Aoki W.
   <Mon. Not. R. Astron. Soc., 404, 253-264 (2010)>
   =2010MNRAS.404..253G
ADC_Keywords: Stars, carbon ; Spectroscopy ; Equivalent widths

Keywords: stars: abundances - stars: carbon - stars: late type -
          stars: Population II

Abstract:
    High-resolution spectra obtained from the Subaru Telescope High
    Dispersion Spectrograph have been used to update the stellar
    atmospheric parameters and metallicity of the star HD 209621. We have
    derived a metallicity of [Fe/H]=-1.93 for this star, and have found
    a large enhancement of carbon and of heavy elements, with respect to
    iron. Updates on the elemental abundances of four s-process elements
    (Y, Ce, Pr, Nd) along with the first estimates of abundances for a
    number of other heavy elements (Sr, Zr, Ba, La, Sm, Eu, Er, Pb) are
    reported.

Description:
    High-resolution spectroscopic observations of HD 209621 were carried
    out with the High Dispersion Spectrograph (HDS) of the 8.2-m Subaru
    Telescope on 2005 July 20 at a resolving power of R∼50000. The object
    spectrum was taken with a 5-min exposure. The observed bandpass ran
    from about 4020 to 6775Å, with a gap of about 75Å, from 5335 to
    5410Å, due to the physical spacing of the CCD detectors.
    Observations of a Th-Ar hollow cathode lamp provided the wavelength
    calibration.
Objects:
    ------------------------------------------------
       RA   (2000)   DE      Designation(s)
    ------------------------------------------------
    22 04 25.1   +21 03 09   HD 209621 = V* HP Peg
    ------------------------------------------------

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
tables1.dat       74      246   Lines of heavy elements examined in the spectra
                              of HD 209621 (Carbon star with Tef4500K)


Byte-by-byte Description of file: tables1.dat

   Bytes Format Units   Label     Explanations

   1-  8  F8.3  0.1nm   lambda    Laboratory wavelength
  10- 13  F4.1  ---     Z         Atomic number with ionization
  15- 21  F7.5  eV      Elow      Lower excitation potential
  23- 28  F6.3  [-]     loggf     Oscillator strength
  30- 35  F6.2  0.1pm   EW        ? Equivalent width (mÅ)
  37- 74  A38   ---     Rem       Remarks (1)

Note (1): Remarks codes are:
       +X = indicates the line is blended with contributions from element X
       DC = uncertainty in placing continuum
       MC = affected by molecular contamination
  shallow = indicates the wings of the line profile do not reach continuum
       lw = left wing
       rw = right wing


History:
    From electronic version of the journal
(End)                                      Patricia Vannier [CDS]    21-Oct-2010