J/AJ/128/1177 Galactic stellar abundances (Venn+, 2004)
Stellar chemical signatures and hierarchical galaxy formation. Venn K.A., Irwin M., Shetrone M.D., Tout C.A., Hill V., Tolstoy E. <Astron. J., 128, 1177-1195 (2004)> =2004AJ....128.1177V
ADC_Keywords: Abundances ; Space velocities ; Milky Way Keywords: galaxies: abundances - galaxies: dwarf - galaxies: formation - Galaxy: abundances - Galaxy: disk - Galaxy: halo - Galaxy: stellar content - Local Group - stars: abundances - stars: kinematics Abstract: To compare the chemistries of stars in the Milky Way dwarf spheroidal (dSph) satellite galaxies with stars in the Galaxy, we have compiled a large sample of Galactic stellar abundances from the literature. When kinematic information is available, we have assigned the stars to standard Galactic components through Bayesian classification based on Gaussian velocity ellipsoids. As found in previous studies, the [α/Fe] ratios of most stars in the dSph galaxies are generally lower than similar metallicity Galactic stars in this extended sample. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 140 821 Assembled Literature Data refs.dat 136 18 References (from table1)
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 10 A10 --- Name Star name 14 A1 --- n_Name [BH] Unexplained flag 16- 21 F6.1 km/s UVel Galactocentric U-velocity (1) 23- 28 F6.1 km/s VVel Galactocentric V-velocity (1) 30- 35 F6.1 km/s WVel Galactocentric W-velocity (1) 37- 39 F3.1 --- Thin Thin disk membership probability (2) 41- 43 F3.1 --- Thick Thick disk membership probability (2) 45- 47 F3.1 --- Halo Halo membership probability (2) 49 I1 --- G [0/1] Index indicating a giant star (3) 51- 57 F7.2 [Sun] [Fe/H] ? Log Fe/H relative to solar (4) 59- 65 F7.2 [Sun] [Mg/Fe] ? Log Mg/Fe relative to solar (4) 67- 73 F7.2 [Sun] [Ca/Fe] ? Log Ca/Fe relative to solar (4) 75- 81 F7.2 [Sun] [Ti/Fe] ? Log Ti/Fe relative to solar (4) 83- 89 F7.2 [Sun] [a/Fe] ? Log α/Fe relative to solar (4) 91- 97 F7.2 [Sun] [Na/Fe] ? Log Na/Fe relative to solar (4) 99-105 F7.2 [Sun] [Ni/Fe] ? Log Ni/Fe relative to solar (4) 107-113 F7.2 [Sun] [Y/Fe] ? Log Y/Fe relative to solar (4) 115-121 F7.2 [Sun] [Ba/Fe] ? Log Ba/Fe relative to solar (4) 123-129 F7.2 [Sun] [La/Fe] ? Log La/Fe relative to solar (4) 131-137 F7.2 [Sun] [Eu/Fe] ? Log Eu/Fe relative to solar (4) 139-140 I2 --- Ref Reference detailed in file "refs.dat"
Note (1): Galactocentric velocities, where U and W are the local standard of rest velocities and V is corrected for solar motion (V=V-LSR+220km/s). Defined such that positive U-values denote motion away from the Galactic center, positive V-values are in the direction of the solar motion, and positive W are parallel to the direction of the north Galactic pole. When velocities are not available we have used U=W=1000.0 and V=0.0 and adopted a Galactic component for that star. Note (2): Calculated here using the velocity ellipsoids in Table 3: Thin Disk Vel=(0, 220, 0), sigma= (44, 25, 20) km/s Thick Disk Vel=(0, 180, 0), sigma= (63, 39, 39) km/s Halo Vel=(0, 0, 0), sigma=(141,106, 94) km/s Note (3): This index notes if the star is a giant, log(gravity)≤3.0, when Gind=1, else the star is a dwarf with Gind=0. Note (4): Any abundance ratio over 9.0 is a dummy value.
Byte-by-byte Description of file: refs.dat
Bytes Format Units Label Explanations
1- 2 I2 --- Ref Reference number 4- 74 A71 --- Text Authors and Bibcodes 77- 79 I3 --- N Number of stars 81-136 A56 --- Comm Comments
History: * 15-Feb-2005: From electronic version of the journal * 08-May-2005: Added file "refs.dat" from table1, completed with the missing references.
(End) Greg Schwarz [AAS], Marianne Brouty [CDS] 15-Feb-2005