J/AJ/137/272 Space velocities orbits in the Milky Way halo (Roederer+ 2009)
Chemical inhomogeneities in the Milky Way stellar halo.
Roederer I.U.
<Astron. J., 137, 272-295 (2009)>
=2009AJ....137..272R 2009AJ....137..272R
ADC_Keywords: Stars, nearby ; Stars, population II ; Space velocities
Keywords: Galaxy: formation - Galaxy: halo - globular clusters: general -
nuclear reactions, nucleosynthesis, abundances - stars: abundances -
stars: Population II
Abstract:
We have compiled a sample of 699 stars from the recent literature with
detailed chemical abundance information (spanning -4.2≲[Fe/H]≲+0.3),
and we compute their space velocities and Galactic orbital parameters.
We identify members of the inner and outer stellar halo populations in
our sample based only on their kinematic properties and then compare
the abundance ratios of these populations as a function of [Fe/H].
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 83 720 Space velocities and orbital parameters for the
stellar sample
--------------------------------------------------------------------------------
See also:
J/AJ/128/1177 : Galactic stellar abundances (Venn+, 2004)
J/A+A/275/101 : Chemical evolution of the galactic disk I. (Edvardsson+ 1993)
J/A+A/326/751 : Chemical composition of halo and disk stars (Nissen+, 1997)
J/AJ/120/1841 : Halo & disk stars abundances and kinematics (Fulbright 2000)
J/A+A/410/527 : Abundances in the Galactic disk (Bensby+, 2003)
J/MNRAS/340/304 : [X/Fe] of Galactic disc F and G dwarfs (Reddy+, 2003)
J/A+A/416/1117 : Abundances in the early Galaxy (Cayrel+, 2004)
J/A+A/439/129 : HERES II. Spectroscopic analysis (Barklem+, 2005)
Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 12 A12 --- Name Star name (1)
14- 18 F5.2 [-] [Fe/H] Metallicity
20- 24 I5 pc Dist Heliocentric distance
26- 29 I4 km/s Uvel Velocity towards the Galactic anticenter
31- 34 I4 km/s Vvel Velocity in the direction of galactic rotation
36- 39 I4 km/s Wvel Velocity toward the North Galactic Pole
41- 44 I4 km/s Vphi Rotation velocity about Galactic center
46- 48 F3.1 kpc Rperi ? Minimum Galactocentric radius
50- 54 F5.1 kpc Rapo ? Maximum Galactocentric radius
56- 59 F4.2 --- e ? Orbital eccentricity
61- 65 F5.1 kpc |Zmax| ? Absolute maximum vertical distance from
Galactic plane
67- 71 I5 kpc.km/s JX X angular momentum component
73- 77 I5 kpc.km/s JY Y angular momentum component
79- 83 I5 kpc.km/s JZ Z angular momentum component
--------------------------------------------------------------------------------
Note (1): Only stars that made our proper motion cut are shown in the
table. No orbital parameters are given for stars that did not complete
at least 20 orbits of the Galactic center.
--------------------------------------------------------------------------------
History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 31-Aug-2011