GMASS ultradeep spectroscopy of galaxies at z ~ 2 - IV. The variety of dust populations

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Volume 499 / No 1 (May III 2009)

A&A, 499 1 (2009) 69-85

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Table 2:

UV-bump parameters analogous to those introduced by Fitzpatrick & Massa (1990).
Sample^a	Selection	E_B-V	x₀ [ $\mu$ m^-1]	$\lambda_0$ [Å]	$\gamma$ [ $\mu$ m^-1]	FWHM [Å]
(a) gm_wbb	GMASS, 1.5 < z < 2.5, $\gamma _{34} > -2$ , $\beta_{\rm b} < -1.5$	$0.164 \pm 0.069$	$4.493 \pm 0.024$	$2226 \pm 12$	$0.498 \pm 0.113$	$247 \pm 56$
(b) gm_wbr	GMASS, 1.5 < z < 2.5, $\gamma _{34} > -2$ , $\beta_{\rm b} > -1.5$	$0.286 \pm 0.071$	$4.558 \pm 0.024$	$2194 \pm 11$	$0.682 \pm 0.052$	$328 \pm 25$
(c) gm_sb	GMASS, 1.5 < z < 2.5, $\gamma _{34} < -2$	$0.296 \pm 0.069$	$4.572 \pm 0.010$	$2187 \pm 05$	$0.573 \pm 0.021$	$274 \pm 10$
(d) n07_sb	FDF/K20, 1.0 < z < 1.5, $\gamma _{34} < -2$	$0.344 \pm 0.078$	$4.570 \pm 0.019$	$2188 \pm 09$	$0.583 \pm 0.083$	$279 \pm 38$
(e) LMC2_low $\gamma$	LMC 2 supershell ( $\gamma < 1$ )	$0.188 \pm 0.009$	$4.540 \pm 0.053$	$2203 \pm 26$	$0.684 \pm 0.042$	$332 \pm 21$
Sample^a	Selection	c₃ [ $\mu$ m^-2]	$E_{\rm bump}$	$A_{\rm bump}$ [ $\mu$ m^-1]
(a) gm_wbb	GMASS, 1.5 < z < 2.5, $\gamma _{34} > -2$ , $\beta_{\rm b} < -1.5$	$0.116 \pm 0.055$	$0.467 \pm 0.267$	$0.366 \pm 0.192$
(b) gm_wbr	GMASS, 1.5 < z < 2.5, $\gamma _{34} > -2$ , $\beta_{\rm b} > -1.5$	$0.262 \pm 0.040$	$0.562 \pm 0.106$	$0.602 \pm 0.104$
(c) gm_sb	GMASS, 1.5 < z < 2.5, $\gamma _{34} < -2$	$0.305 \pm 0.020$	$0.928 \pm 0.077$	$0.835 \pm 0.062$
(d) n07_sb	FDF/K20, 1.0 < z < 1.5, $\gamma _{34} < -2$	$0.359 \pm 0.121$	$1.056 \pm 0.186$	$0.968 \pm 0.251$
(e) LMC2_low $\gamma$	LMC 2 supershell ( $\gamma < 1$ )	$0.890 \pm 0.128$	$1.903 \pm 0.320$	$2.044 \pm 0.320$

^a: For the samples at high redshift, the given errors are based on the uncertainties in the continuum of the mean spectrum without the 2175 Å feature, E_B-V, and the FM-like parameter fit. For the LMC, they represent the sample variance.

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