J/AN/331/474 Abundances of metal-poor stars (Frebel, 2010)
Stellar archaeology: Exploring the Universe with metal-poor stars.
Frebel A.
<Astron. Nachrichten, 331, 474-488 (2010)>
=2010AN....331..474F 2010AN....331..474F
ADC_Keywords: Stars, metal-deficient ; Abundances
Keywords: early Universe - Galaxy: halo - Galaxy: stellar content -
stars: abundances - stars: Population
Abstract:
The abundance patterns of the most metal-poor stars in the Galactic
halo and small dwarf galaxies provide us with a wealth of information
about the early Universe. In particular, these old survivors allow us
to study the nature of the first stars and supernovae, the relevant
nucleosynthesis processes responsible for the formation and evolution
of the elements, early star- and galaxy formation processes, as well
as the assembly process of the stellar halo from dwarf galaxies a long
time ago. This review presents the current state of the field of
"stellar archaeology" -- the diverse use of metal-poor stars to
explore the high-redshift Universe and its constituents. In
particular, the conditions for early star formation are discussed, how
these ultimately led to a chemical evolution, and what the role of the
most iron-poor stars is for learning about Population III supernovae
yields. Rapid neutron-capture signatures found in metal-poor stars can
be used to obtain stellar ages, but also to constrain this complex
nucleosynthesis process with observational measurements. Moreover,
chemical abundances of extremely metal-poor stars in different types
of dwarf galaxies can be used to infer details on the formation
scenario of the halo and the role of dwarf galaxies as Galactic
building blocks. I conclude with an outlook as to where this field may
be heading within the next decade. A table of ∼1000 metal-poor stars
and their abundances as collected from the literature is provided in
electronic format.
Description:
All tables contain 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.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
stars.dat 419 936 Vetted table with one entry for each star
logeps.dat 420 1223 Abundances collected
alimits.dat 330 1223 Upper limits for abundances
refs.dat 46 85 References
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See also:
http://space.mit.edu/home/afrebel/abundances/abund.html : Home page of
"Chemical abundances of metal-poor stars"
Byte-by-byte Description of file: stars.dat logeps.dat
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Bytes Format Units Label Explanations
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1 I1 --- S Sequence number ("1" for vetted list)
7- 10 I4 --- Seq Running number
12- 25 A14 --- Name Star name
26- 48 A23 --- SName Name as in Simbad
50- 51 A2 --- ke Key entry (1)
53- 57 F5.2 [-] eps03 ?=- logε for Li
59- 63 F5.2 [-] eps06 ?=- logε for C
65- 69 F5.2 [-] eps07 ?=- logε for N
71- 75 F5.2 [-] eps08 ?=- logε for O
77- 81 F5.2 [-] eps11 ?=- logε for Na
83- 87 F5.2 [-] eps12 ?=- logε for Mg
89- 93 F5.2 [-] eps13 ?=- logε for Al
95- 99 F5.2 [-] eps14 ?=- logε for Si
101-105 F5.2 [-] eps20 ?=- logε for Ca
107-111 F5.2 [-] eps21 ?=- logε for Sc
113-117 F5.2 [-] eps22 ?=- logε for Ti
119-123 F5.2 [-] eps11a ?=- logε for Na
125-129 F5.2 [-] eps12a ?=- logε for Mg
131-135 F5.2 [-] eps13a ?=- logε for Al
137-141 F5.2 [-] eps14a ?=- logε for Si
143-147 F5.2 [-] eps20a ?=- logε for Ca
149-153 F5.2 [-] eps21a ?=- logε for Sc
155-159 F5.2 [-] eps22a ?=- logε for Ti
161-165 F5.2 [-] eps23 ?=- logε for V
167-171 F5.2 [-] eps24 ?=- logε for Cr
173-177 F5.2 [-] eps25 ?=- logε for Mn
179-183 F5.2 [-] eps26 ?=- logε for Fe
185-189 F5.2 [-] eps27 ?=- logε for Co
191-195 F5.2 [-] eps28 ?=- logε for Ni
197-201 F5.2 [-] eps30 ?=- logε for Zn
203-207 F5.2 [-] eps31 ?=- logε for Ga
209-213 F5.2 [-] eps32 ?=- logε for Ge
215-219 F5.2 [-] eps38 ?=- logε for Sr
221-225 F5.2 [-] eps39 ?=- logε for Y
227-231 F5.2 [-] eps40 ?=- logε for Zr
233-237 F5.2 [-] eps41 ?=- logε for Nb
239-243 F5.2 [-] eps42 ?=- logε for Mo
245-249 F5.2 [-] eps44 ?=- logε for Ru
251-255 F5.2 [-] eps45 ?=- logε for Rh
257-261 F5.2 [-] eps46 ?=- logε for Pd
263-267 F5.2 [-] eps47 ?=- logε for Ag
269-273 F5.2 [-] eps56 ?=- logε for Ba
275-279 F5.2 [-] eps57 ?=- logε for La
281-285 F5.2 [-] eps58 ?=- logε for Ce
287-291 F5.2 [-] eps59 ?=- logε for Pr
293-297 F5.2 [-] eps60 ?=- logε for Nd
299-303 F5.2 [-] eps62 ?=- logε for Sm
305-309 F5.2 [-] eps63 ?=- logε for Eu
311-315 F5.2 [-] eps64 ?=- logε for Gd
317-321 F5.2 [-] eps65 ?=- logε for Tb
323-327 F5.2 [-] eps66 ?=- logε for Dy
329-333 F5.2 [-] eps67 ?=- logε for Ho
335-339 F5.2 [-] eps68 ?=- logε for Er
341-345 F5.2 [-] eps69 ?=- logε for Tm
347-351 F5.2 [-] eps70 ?=- logε for Yb
353-357 F5.2 [-] eps71 ?=- logε for Lu
359-363 F5.2 [-] eps72 ?=- logε for Hf
365-369 F5.2 [-] eps76 ?=- logε for Os
371-375 F5.2 [-] eps77 ?=- logε for Ir
377-381 F5.2 [-] eps78 ?=- logε for Pt
383-387 F5.2 [-] eps79 ?=- logε for Au
389-393 F5.2 [-] eps82 ?=- logε for Pb
395-399 F5.2 [-] eps90 ?=- logε for Th
401-405 F5.2 [-] eps92 ?=- logε for U
407-411 F5.2 [-] [Fe/H] Metallicity
413-420 A8 --- Ref Reference, in ref.dat file
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Note (1): "science keys" are as follows:
BM = blue metal-poor stars
R1 = r-process stars, with [Fe/H]←2.0, 0.3<[Eu/Fe]≤1.0, [Ba/Eu]<0.0
R2 = r-process stars, with [Fe/H]←2.0, [Eu/Fe]>1.0, [Ba/Eu]<0.0
RS = r-process stars, with [Fe/H]←2.0, [Eu/Fe]>0.5, [Ba/Eu]≥0.0
AL = not explained in the paper (1 star)
DW = not explained in the paper (53 stars)
HB = not explained in the paper (12 stars)
NO = not explained in the paper (1 star)
UF = not explained in the paper (17 stars)
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Byte-by-byte Description of file: alimits.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1 I1 --- S Sequence number ("1" only for vetted list)
7- 10 I4 --- Seq Running number
12- 19 A8 --- Ref Reference
21- 33 A13 --- Name Star name
35- 57 A23 --- SName Name as in Simbad
59- 62 F4.2 [-] l03 ?=- limit on logε for Li
64- 67 F4.2 [-] l06 ?=- limit on logε for C
69- 72 F4.2 [-] l07 ?=- limit on logε for N
74- 78 F5.2 [-] l08 ?=- limit on logε for O
80- 84 F5.2 [-] l11 ?=- limit on logε for Na
86- 90 F5.2 [-] l12 ?=- limit on logε for Mg
92- 96 F5.2 [-] l13 ?=- limit on logε for Al
98-102 F5.2 [-] l14 ?=- limit on logε for Si
104-107 F4.2 [-] l21 ?=- limit on logε for Sc
109-113 F5.2 [-] l22 ?=- limit on logε for Ti
115-119 F5.2 [-] l23 ?=- limit on logε for V
121-124 F4.2 [-] l24 ?=- limit on logε for Cr
126-129 F4.2 [-] l25 ?=- limit on logε for Mn
131-135 F5.2 [-] l27 ?=- limit on logε for Co
137-141 F5.2 [-] l28 ?=- limit on logε for Ni
143-147 F5.2 [-] l30 ?=- limit on logε for Zn
149-153 F5.2 [-] l31 ?=- limit on logε for Ga
155-159 F5.2 [-] l32 ?=- limit on logε for Ge
161-164 F4.2 [-] l38 ?=- limit on logε for Sr
166-169 F4.2 [-] l39 ?=- limit on logε for Y
171-175 F5.2 [-] l40 ?=- limit on logε for Zr
177-181 F5.2 [-] l42 ?=- limit on logε for Mo
183-187 F5.2 [-] l44 ?=- limit on logε for Ru
189-193 F5.2 [-] l45 ?=- limit on logε for Rh
195-199 F5.2 [-] l46 ?=- limit on logε for Pd
201-205 F5.2 [-] l56 ?=- limit on logε for Ba
207-211 F5.2 [-] l57 ?=- limit on logε for La
213-216 F4.2 [-] l58 ?=- limit on logε for Ce
218-222 F5.2 [-] l59 ?=- limit on logε for Pr
224-228 F5.2 [-] l60 ?=- limit on logε for Nd
230-234 F5.2 [-] l62 ?=- limit on logε for Sm
236-240 F5.2 [-] l63 ?=- limit on logε for Eu
242-246 F5.2 [-] l64 ?=- limit on logε for Gd
248-252 F5.2 [-] l65 ?=- limit on logε for Tb
254-258 F5.2 [-] l66 ?=- limit on logε for Dy
260-264 F5.2 [-] l67 ?=- limit on logε for Ho
266-270 F5.2 [-] l68 ?=- limit on logε for Er
272-276 F5.2 [-] l69 ?=- limit on logε for Tm
278-282 F5.2 [-] l71 ?=- limit on logε for Lu
284-288 F5.2 [-] l72 ?=- limit on logε for Hf
290-294 F5.2 [-] l76 ?=- limit on logε for Os
296-300 F5.2 [-] l77 ?=- limit on logε for Ir
302-306 F5.2 [-] l78 ?=- limit on logε for Pt
308-312 F5.2 [-] l79 ?=- limit on logε for Au
314-318 F5.2 [-] l82 ?=- limit on logε for Pb
320-324 F5.2 [-] l90 ?=- limit on logε for Th
326-330 F5.2 [-] l92 ?=- limit on logε for U
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Byte-by-byte Description of file: refs.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- Ref Reference code
10- 28 A19 --- BibCode BibCode
30- 46 A17 --- Aut Author's name
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History:
From http://space.mit.edu/home/afrebel/abundances
(End) Francois Ochsenbein [CDS] 15-Feb-2013