Access to Astronomical Catalogues

← Click to display the menu
J/ApJ/705/328       Abundance measurements in Sculptor dSph      (Kirby+, 2009)

Multi-element abundance measurements from medium-resolution spectra. I. The Sculptor dwarf spheroidal galaxy. Kirby E.N., Guhathakurta P., Bolte M., Sneden C., Geha M.C. <Astrophys. J., 705, 328-346 (2009)> =2009ApJ...705..328K
ADC_Keywords: Abundances, [Fe/H] ; Galaxies, nearby ; Photometry, CMT1T2V Keywords: galaxies: abundances - galaxies: dwarf - galaxies: individual (Sculptor dwarf) - Galaxy: evolution - Local Group Abstract: We present measurements of Fe, Mg, Si, Ca, and Ti abundances for 388 radial velocity member stars in the Sculptor dwarf spheroidal galaxy (dSph), a satellite of the Milky Way (MW). This is the largest sample of individual α element (Mg, Si, Ca, and Ti) abundance measurements in any single dSph. The measurements are made from Keck/Deep Imaging Multi-Object Spectrometer medium-resolution spectra (6400-9000Å, R∼6500). Based on comparisons to published high-resolution (R≳20000) spectroscopic measurements, our measurements have uncertainties of α[Fe/H]=0.14 and α[α/Fe]=0.13. We have discovered one star with [Fe/H]=-3.80±0.28, which is the most metal-poor star known anywhere except the MW halo, but high-resolution spectroscopy is needed to measure this star's detailed abundances. Description: We selected targets from the Sculptor photometric catalog of Westfall et al. (2006, Cat. J/AJ/131/375). DEIMOS observations were made in 2008 Aug 3,4,31 and Sep 1. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table6.dat 116 388 Multi-element abundances in Sculptor
See also: J/ApJS/191/352 : Stars in Milky Way dwarf satellite galaxies (Kirby+, 2010) J/ApJ/682/1217 : Abundances in red giants in 7 globular clusters (Kirby+, 2008) J/AJ/131/375 : Exploring halo substructures. VIII. (Westfall+, 2006) J/MNRAS/363/734 : Sculptor dSph variables metal abundances (Clementini+, 2005) J/AJ/130/1065 : Members of the Sculptor dwarf spheroidal galaxy (Coleman+, 2005) J/AJ/110/2747 : Stars in Sculptor dwarf spheroidal galaxy (Schweitzer+ 1995) Byte-by-byte Description of file: table6.dat
Bytes Format Units Label Explanations
1- 2 I2 h RAh Hour of Right Ascension (J2000) 4- 5 I2 min RAm Minute of Right Ascension (J2000) 7- 10 F4.1 s RAs Second of Right Ascension (J2000) 12 A1 --- DE- Sign of the Declination (J2000) 13- 14 I2 deg DEd Degree of Declination (J2000) 16- 17 I2 arcmin DEm Arcminute of Declination (J2000) 19- 20 I2 arcsec DEs Arcsecond of Declination (J2000) 22- 27 F6.3 mag Mmag Washington M band magnitude 29- 33 F5.3 mag e_Mmag Uncertainty in Mmag 35- 40 F6.3 mag T2mag Washington T2 band magnitude 42- 46 F5.3 mag e_T2mag Uncertainty in T2mag 48- 51 I4 K Teff Effective temperature 53- 56 F4.2 [cm/s2] logg Log of surface gravity 58- 61 F4.2 km/s vt Microturbulent velocity 63- 67 F5.2 [Sun] [Fe/H] Iron abundance relative to the Sun 69- 72 F4.2 [Sun] e_[Fe/H] Uncertainty in [Fe/H] 74- 78 F5.2 [Sun] [Mg/Fe] ? Magnesium-to-iron ratio relative to the Sun 80- 83 F4.2 [Sun] e_[Mg/Fe] ? Uncertainty in [Mg/Fe] 85- 89 F5.2 [Sun] [Si/Fe] ? Silicon-to-iron ratio relative to the Sun 91- 94 F4.2 [Sun] e_[Si/Fe] ? Uncertainty in [Si/Fe] 96-100 F5.2 [Sun] [Ca/Fe] ? Calcium-to-iron ratio relative to the Sun 102-105 F4.2 [Sun] e_[Ca/Fe] ? Uncertainty in [Ca/Fe] 107-111 F5.2 [Sun] [Ti/Fe] ? Titanium-to-iron ratio relative to the Sun 113-116 F4.2 [Sun] e_[Ti/Fe] ? Uncertainty in [Ti/Fe]
Nomenclature notes: Stars are <[KGB2009] JHHMMSS.s+DDMMSS> in Simbad. History: From electronic version of the journal References: Kirby et al. Paper II. 2010ApJS..191..352K Cat J/ApJS/191/352
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 18-Jan-2011
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

catalogue service

© UDS/CNRS

Contact