Table 8
Abundances towards GRB 080310 compared to other absorbers.
| Ratio | Comp. b | Comps. c+d | Total | GRB DLAs | QSO (sub-)DLAs | QSO LLSs | References |
|
|
|||||||
| [C/H] | – | – | −1.3 ± 0.2 | [−1.9, +0.2] | [1] | ||
| [O/H] | – | – | <−0.8 | ||||
| [Si/H] | – | – | −1.2 ± 0.2 | [−2.6, +0.7] | [−2.6, +0.0] | [−0.5, +0.0] | [1], [2], [3], [4] |
| [Cr/H] | – | – | +0.7 ± 0.2 | [−2.3, −0.8] | [3] | ||
| [Fe/H] | – | – | +0.2 ± 0.2 | [−3.0, +0.2] | [−3.0, +0.0] | [−0.6, −0.4] | [2], [3], [5], [6], [7] |
| [Ni/H] | – | – | a < +0.95 | [−2.3, −0.6] | [3] | ||
| [Zn/H] | – | – | a < +1.08 | [−1.8, +0.2] | [−2.0, +0.0] | [2], [4] | |
|
|
|||||||
| [C/Fe] | ≤−1.74 | a,b ≤−0.91 | −1.5 ± 0.2 | [−0.4, +2.0] | [7] | ||
| [O/Fe] | <−1.09 | <−1.18 | <−0.8 | [−0.4, +1.2] | [7] | ||
| [Si/Fe] | ≤−1.47 | a,b ≤−0.72 | −1.4 ± 0.2 | [−0.3, +1.2] | [−0.1, +0.7] | [2], [3], [7], [8] | |
| [Cr/Fe] | a +0.56 ± 0.19 | a < +0.79 | +0.5 ± 0.2 | [−0.1, +0.5] | [3], [8] | ||
| [Ni/Fe] | a < +0.45 | a < +0.70 | a<+0.52 | [−0.2, +0.3] | [3] | ||
| [Zn/Fe] | a < +0.56 | a < +0.81 | a<+0.65 | [+0.0, +1.7] | [+0.0, +1.0] | [2], [7] | |
Notes. Abundances with respect to either H or Fe estimated for the GRB 080310 absorber (see text for a description of the pre-burst ionization corrections). The ranges of abundances observed in GRB or QSO absorbers are listed on the right side of the table. All these abundances are visualized in Fig. 7. a Ionic relative abundances, i.e., not including the ionization effects of either the GRB or the ambient radiation field. b Does not include the possible – albeit limited – underestimate of Si and C in component “c” at epochs II and IV.
References. [1] QSO LLSs, Prochaska & Burles (1999); [2] GRB DLAs, Schady et al. (2011); [3] Prochaska et al. (2001); [4] Wolfe et al. (2005); [5] QSO sub-DLAs, Dessauges-Zavadsky et al. (2009); [6] QSO LLSs, Prochaska (1999); [7] QSO sub-DLAs, Péroux et al. (2003); [8] Ledoux et al. (2002).
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