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 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:
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RA (2000) DE Designation(s)
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22 04 25.1 +21 03 09 HD 209621 = V* HP Peg
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tables1.dat 74 246 Lines of heavy elements examined in the spectra
of HD 209621 (Carbon star with Tef4500K)
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Byte-by-byte Description of file: tables1.dat
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Bytes Format Units Label Explanations
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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)
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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
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 21-Oct-2010