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

A collection of literature data

Latest news:

Abundance table now ready: Version 1.0


The table contains abundance from the following studies.

The metallicity distribution of the stars in the table
(excluding the Fullbright '00 sample)

The paper

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

Data tables

The "raw" table contains just the log epsilon values, and can be found here

Abundances [X/Fe] have been calculated for different solar abundances.
Choose your favorite one here

These tables also include coordinates, radial velocities and magnitudes from SIMBAD for most stars.

Plots of the abundance trends

Using the data table (containing no duplicates, solar abundances of Asplund et al. 2009) abundance trends
can be inspected. Plots of all elements can be found here.

Science keys

In the works:
I have started classifying as many stars as possible so plotting different groups of abundance patterns
becomes more straight forward. However, when a star falls into more than just one cateogry, I have classified
it according to it most significant chemical signature. While the grouping has been tested, this may not suit
your ideas/aims/work.

Science key have been assigned to reflect the dominant stellar chemical signature.
RP: r-process enhanced stars
SP: s-process enhanced stars
RS: r- and s-process enhanced stars
DW: star in a classical dwarf galaxy
UF: star in an ultra-faint dwarf galaxy

Feel free to send me more suggestions for categories and/or list of stars in each category.


This table is surely not complete, although great care has been taken to include all relevant studies. If you like
your study to be included (given that it makes sense to include it), send me an email and I'll add it.
The same holds true for the science classification. If there are any errors or omissions, please let me know.

Also, none of these studies (as far as I know) have been selected in an unbiased fashion -- hence, care
should be taken when trying to establish comparison with the data from a statistical point of view. But
please contact the first authors for more information.

last updated: June 2010, by A. Frebel