EDP Sciences logo
Subscriber Authentication Point
Search
Menu
Home All issues Volume 527 (March 2011) A&A, 527 (2011) A148 Full HTML
Free Access

Table 1

Mean abundances and abundance dispersions compared to literature values for NGC 6397.

nstars nlines  ⟨ A(X) ⟩  σ C09af K07bf G01c C00d  ⟨ A(X) ⟩ I  ⟨ A(X) ⟩ II ΔA(X)II − I
 [Fe/H]  21 11–13  −2.08 0.02  −1.95  −2.12  −2.05  −2.0  −2.05 ± 0.02  −2.08 ± 0.01  −0.03 ± 0.02
 [O/Fe] e 17 1–3 0.58 0.13 0.35 ... 0.37 0.15 0.71 ± 0.04 0.56 ± 0.03  −0.15 ± 0.05
 [Na/Fe]  21 1–2 0.11 0.14 0.11 ... 0.31 0.19  −0.18 ± 0.07 0.16 ± 0.02 0.34 ± 0.07
 [Mg/Fe]  21 1 0.31 0.07 0.25 0.37 0.20 ... 0.43 ± 0.03 0.29 ± 0.01  −0.14 ± 0.04
 [Al/Fe] e 21 1–2 0.42 0.12 ... ... 0.35 ...  < 0.34 0.44 ± 0.03 0.10 ± 0.07
 [Si/Fe]  21 2–4 0.24 0.07 0.28 ... ... 0.27 0.20 ± 0.02 0.25 ± 0.02 0.04 ± 0.03
 [Ca/Fe]  21 16 0.25 0.02 ... 0.37 ... 0.20 0.25 ± 0.02 0.25 ± 0.01  −0.00 ± 0.02
 [Sc/Fe]  21 5–6 0.11 0.03 ... ... ... ... 0.10 ± 0.01 0.12 ± 0.01 0.01 ± 0.01
 [Ti/Fe]  21 3–5 0.30 0.03 ... 0.22 ... 0.36 0.31 ± 0.01 0.30 ± 0.01  −0.02 ± 0.01
 [Cr/Fe]  21 1–2 0.02 0.05 ... ... ... ... 0.03 ± 0.01 0.02 ± 0.01  −0.01 ± 0.02
 [Mn/Fe]  17 1  −0.54 0.13 ... ... ... ...  −0.48 ± 0.09  −0.55 ± 0.03  −0.07 ± 0.09
 [Co/Fe]  13 1 0.10 0.10 ... ... ... ... 0.12 ± 0.08 0.09 ± 0.03  −0.03 ± 0.09
 [Ni/Fe]  21 8–13  −0.14 0.04 ... ... ... ...  −0.15 ± 0.03  −0.14 ± 0.01 0.01 ± 0.03
 [Cu/Fe]  13 1  −0.89 0.09 ... ... ... ...  −0.87 ± 0.05  −0.90 ± 0.03  −0.03 ± 0.06
 [Zn/Fe]  21 1 0.01 0.06 ... ... ... ... 0.02 ± 0.03 0.01 ± 0.02  −0.01 ± 0.03
 [Y/Fe]  21 2  −0.26 0.03 ... ... ...  −0.16  −0.29 ± 0.01  −0.25 ± 0.01 0.04 ± 0.01
 [Zr/Fe]  5 1 0.11 0.06 ... ... ... ... 0.14 ± 0.10 0.10 ± 0.03  −0.04 ± 0.11
 [Ba/Fe]  21 1–2  −0.08 0.05 ...  −0.18 ...  −0.16  −0.12 ± 0.04  −0.07 ± 0.01 0.05 ± 0.04
 [Ce/Fe]  4 1 0.42 0.04 ... ... ... ... 0.42 ± 0.14 0.42 ± 0.03 0.00 ± 0.14
 [Nd/Fe]  16 3–5 0.18 0.05 ... ... ... ... 0.14 ± 0.05 0.19 ± 0.01 0.05 ± 0.05
 [Eu/Fe]  8 1 0.40 0.06 ... ... ... ... 0.38 ± 0.05 0.41 ± 0.03 0.03 ± 0.06

Notes. Listed are also the mean abundances of the RGB stars characterised as belonging to the first generation ( ⟨ A(X) ⟩ I, 3 stars) and second generation ( ⟨ A(X) ⟩ II, 18 stars), as well as the difference between the two mean quantities.

(a)

Carretta et al. (2009a), mean of 13 targets. [Fe/H] based on FeI lines.

(b)

Korn et al. (2007), mean of six brightest targets.

(c)

Gratton et al. (2001), mean of three brightest targets.

(d)

Castilho et al. (2000), mean of ten brightest targets.

(e)

Upper limits treated as detections.

(f)

Asplund et al. (2009) solar abundances adopted.

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.