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J/ApJ/530/783     The r-process enriched giant HD 115444    (Westin+, 2000)

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
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:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 56 346 Equivalent widths of observed stars
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
Bytes Format Units Label Explanations
1- 7 F7.2 0.1nm Wave ? Wavelength of line 9- 15 A7 --- Ion 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
History: From ApJ electronic edition
(End) Greg Schwarz [AAS] 27-Apr-2000
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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