The Wolf-Rayet features and mass–metallicity relation of long-duration gamma-ray burst host galaxies

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Volume 514 (May 2010)

A&A, 514 (2010) A24

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Table 6:

Metallicities of GRB host galaxies.
	980703	990712	020405	020903	030329	031203	060218	060505^g	060505^h
${N_{\rm e}}[{\rm SII}]$ ^a	-	$20\sim200$	-	$20\sim200$	$20\sim200$	$52.63\pm43.20$	$120.68\pm32.22$	-	-
${T_{\rm e}}[{\rm OIII}]$ ^b	-	$16434.9\pm425.8$	-	$13~517.1\pm335.2$	$17911.7\pm325.0$	$12902.2\pm305.2$	$15113.3\pm335.5$	-	-
$\rm {12 + \log{(O/H)} }(Te)^{c}$	-	$7.812\pm0.15$	-	$8.014\pm0.15$	$7.653\pm0.14$	$8.142\pm0.07$	$7.883\pm0.09$	-	-
$\rm {12+\log{(O/H)}}$ ^d	$8.28\pm0.14$	$8.18\pm0.12$ ^f	$8.10\pm0.12$	$8.11\pm0.12$ ^f	$8.06\pm0.10$ ^f	$8.11\pm0.11$ ^f	$8.16\pm0.14$ ^f	$8.06\pm0.14$ ^f	$7.99\pm0.09$
$(K99\_l)$
$\rm {12+\log{(O/H)}}$ ^d	$8.44\pm0.15$	$8.47\pm0.15$	$8.53\pm0.15$	$8.50\pm0.15$	$8.56\pm0.16$	$8.51\pm0.15$	$8.50\pm0.16$	$8.57\pm0.15$	$8.66\pm0.16$ ^f
$(K99\_u)$
$\log([{\rm NII}]6583$	-	-2.36	-	-1.47	-2.12	-1.23	-1.45	-1.36	-0.52
$/{\rm [OII]}3727)$
A_V^e	$0.144\pm0.532$	$0.551\pm0.025$	$1.927\pm0.359$	$0.146\pm0.086$	$0.244\pm0.046$	$0.280\pm0.040$	$0.000\pm0.018$	$0.526\pm0.081$	$1.601\pm0.310$

Notes. ^(a) Electronic density estimated from the $\rm {[S\ II]}$ flux ratio: I(6716)/I(6731). ^(b) Temperature in K estimated from the following flux ratios: $\rm {[O\ III]}$ I(4959+5007)/I(4363). ^(c) Metallicity, $12+\log$ (O/H), estimated using the effective temperature method. ^(d) Metallicity, $12+\log$ (O/H), estimated following Kobulnicky et al. (1999). K99 $\_l$ (their Eq. (8)) is valid for the lower branch; K99 $\_u$ (their Eq. (9)) is valid for the upper branch. ^(e) Extinction coefficient, A_V (in magnitude) is derived using the standard Balmer ratio of H $\alpha$ and H $\beta$ . For GRB 980703 and 020405, A_V from the ratio of H $\gamma$ and H $\beta$ is adopted. ^(f) Adopted metallicity in this work. The R₂₃ degeneracy are broken using the $\rm {[N\ II]}$ /H $\alpha$ and $\rm {[N\ II]}$ / $\rm {[O\ II]}$ ratios. ^(g) The GRB site. ^(h) The entire host galaxy.

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