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Chemical abundances of metal-poor stars
in the MW halo and dwarf galaxies


A collection of literature data

If you find this table useful for your work/plots, please cite
Frebel 2010, Astronomische Nachrichten, 331, 474

Find the paper here
Find the astro-ph version here
The bibtex entry can be found here

Version:

This is version 1.0 (June 2010)
It probably contains bugs.. let me know if you find one!

Data tables -- please read the 'fine print'

All tables conmtain all the stars collected from the literature studies. However, they do contain a
significant number of duplicates because many studies observe for example the same standard stars.

I here provide both data sets:
1) tables with all the abundances collected, and
2) a vetted table that only contains one entry for each star. More comments on the vetted table below.

Upper limits are included in all tables. In the respective columns, "1" marks that the value given in
the table is an upper limit. The limits are given in a seperate table -- don't forget to download it!

I have also collected coordinates, radial velocities and magnitudes from SIMBAD for most stars.
Note that the SIMBAD radial velocities are from the first publication of a given star which is often the
medium-resolution data. Hence error bars are probably relatively large!! (There are also some plain
wrong numbers in there, but that is SIMBAD's problem.) This should be taken into account when
deriving any conclusions from the radial velocities.

1) Table containing all abundances (includes duplicates)

Check the SIMBAD designations to see the duplicate entries.

The "raw" table contains just the log epsilon values, and can be found here
This table contains the science keys, but you can copy the 'ke' column to any of the other tables.

The table with the upper limits (essential!) info can be found here
(it's seperate because the tables are already rather large...)
This table matches the tables with the log epsilon and all the [X/Fe] values!

The table with the SIMBAD info can be found here

Abundances [X/Fe] have been calculated for different solar abundances:
Stellar abundances based on the Asplund et al. 2009 solar abundances can be found here
Stellar abundances based on the Asplund et al. 2005 solar abundances can be found here
Stellar abundances based on the Grevesse & Sauval 1998 solar abundances can be found here
Stellar abundances based on the Anders & Grevesse 1989 solar abundances can be found here


2) Table containing one entry for each star only (excludes duplicates)

This table is intended for plotting halo stars as comparison or looking at the distributions of chemical subgroups.

For the stars with multiple entries (there are quite a few), I have always selected the entry that contains
the most abundances. Some individual studies have complementary abundances (i.e. light elements and
neutron-capture elements), but I have not merged them and just selected the entry that contains
the most abundances.

The "raw" table contains just the log epsilon values, and can be found here
This table contains the science keys, but you can copy the 'ke' column to any of the other tables.

The table with the upper limits (essential!) info can be found here
(it's seperate because the tables are already rather large...)
This table matches the tables with the log epsilon and all the [X/Fe] values!

The table with the SIMBAD info can be found here

Abundances [X/Fe] have been calculated for different solar abundances.
Stellar abundances based on the Asplund et al. 2009 solar abundances can be found here
Stellar abundances based on the Asplund et al. 2005 solar abundances can be found here
Stellar abundances based on the Grevesse & Sauval 1998 solar abundances can be found here
Stellar abundances based on the Anders & Grevesse 1989 solar abundances can be found here


More details on the science keys

r-process stars have been classified as follows:

r-I:
[Fe/H] < -2.0
0.3 < [Eu/Fe] <= 1.0
[Ba/Eu] < 0.0
no stars will Eu upper limits
no stars in dwarf galaxies

r-II:
[Fe/H] < -2.0
[Eu/Fe] > 1.0
[Ba/Eu] < 0.0
no stars will Eu upper limits
no stars in dwarf galaxies

r+s:
[Fe/H] < -2.0
[Eu/Fe] > 0.5
[Ba/Eu] >= 0.0
no stars will Eu upper limits
no stars in dwarf galaxies

BM: blue metal-poor stars
s-process star classifications (SP) are missing so far...






last updated: June 2010, by A. Frebel