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J/ApJ/655/L33   High-resolution spectrum of OGLE-2006-BLG-265   (Johnson+, 2007)

A high-resolution spectrum of the extremely metal-rich bulge G dwarf OGLE-2006-BLG-265. Johnson J.A., Gal-Yam A., Leonard D.C., Simon J.D., Udalski A., Gould A. <Astrophys. J., 655, L33-L36 (2007)> =2007ApJ...655L..33J
ADC_Keywords: Stars, dwarfs ; Spectroscopy Keywords: Galaxy: abundances - Galaxy: bulge - Galaxy: evolution{a}- gravitational lensing - stars: abundances Abstract: We present an R=45000 Keck spectrum of the microlensed Galactic bulge G dwarf OGLE-2006-BLG-265, which has high (∼60) signal-to-noise ratio despite its short (15 minute) exposure time, because the source was magnified by A∼135. While it is very metal-rich ([Fe/H]=0.56), the higher temperature of this star compared with the luminous red giants usually measured in the bulge gives its spectrum many unblended atomic lines. We measure the abundances of 17 elements, including the first abundances for S and Cu in a bulge star. The [alpha/Fe] ratios are subsolar, while the odd-Z elements are slightly supersolar, trends that are also seen in the more metal-rich stars in the bulge and the local Galactic disk. Because the star is a dwarf, the [O/Fe], [Na/Fe], and [Al/Fe] ratios cannot be attributed to internal mixing, as is sometimes claimed for giants. Similar high-resolution spectra could be obtained for about a dozen bulge dwarf stars per year by means of well-designed target-of-opportunity observations. Description: We observed OGLE-2006-BLG-265 using the High Resolution Echelle Spectrometer (HIRES) mounted on the Keck I 10m telescope on 2006 June 6 with a 600s exposure ending at 14:07:11 UT and a 300s second exposure ending at 14:49:53 UT. Objects: -------------------------------------------------------------- RA (2000) DE Designation(s) -------------------------------------------------------------- 18 07 18.9 -27 47 43 OGLE-2006-BLG-265 = EWS 2006-BLG-265 -------------------------------------------------------------- File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 41 501 Equivalent widths and line information
Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 4 A4 --- Ion Ion designation 6- 13 F8.3 0.1nm lambda Wavelength 15- 19 F5.3 eV EP Energy potential 21- 26 F6.3 --- loggf Oscillator strength 28- 30 F3.1 --- Damp Damping factor (Correction factor to the Unsoeld approximation) 32- 36 F5.1 0.1pm EW ? Equivalent width 37 A1 --- n_EW [b] b is treated as a blend 39- 41 I3 --- A ? Isotope number
History: From electronic version of the journal
(End) Patricia Vannier [CDS] 08-Dec-2008
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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