VLT/FORS1 spectrophotometry of the first planetary nebula discovered in the Phoenix dwarf galaxy

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Volume 494 / No 2 (February I 2009)

A&A, 494 2 (2009) 515-525

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Table 4:

Constraints on model parameters.
Parameter	Constraint
$R_{{\rm in}}$ free	standard 1 $\times$ 10¹⁷ cm
$N_{{\rm in}}$ (H) free	$P_{{\rm in}}$ < $P_{{\rm out}}$ ; stdd 1200 cm^-3; ``[Ar IV] $\lambda$ 4740/ $\lambda$ 4711+''
$T_{{\rm BB}}$ free	$\tau_{\rm c}$ / $\tau_{1}$ > 1.2; ``upper limit [O I] $\lambda$ 6300''
$\tau_{1}$ (thin)	absolute flux I(H $\beta$ )
$f_{2}^{{\rm cov}}$ (thick)	[O II] $\lambda$ 3727; ( $f_{1}^{{\rm cov}}$ + $f_{2}^{{\rm cov}}$ = 1)
$P_{{\rm out}}$	ratio [S II] $\lambda$ 6731/ $\lambda$ 6716
$\tau_{\rm c}$ / $\tau_{1}$	He I $\lambda$ 5876 (see text)
L	ratio [Ar IV] $\lambda$ 4740 / [Ar III] $\lambda$ 7135
He	He II $\lambda$ 4686
C	ratio [O III] $\lambda$ 4363/( $\lambda$ 4959+ $\lambda$ 5007)
N	[N II] $\lambda$ 6584
O	[O III] $\lambda$ 5007+ $\lambda$ 4959
Ne	[Ne III] $\lambda$ 3869
S	S/Ar = 4.37 by number (solar); ``[S III] $\lambda$ 6312''
Ar	[Ar III] $\lambda$ 7135 + [Ar IV] $\lambda$ 4740
Fe	Fe/H = 4 $\times$ 10^-7 by number; ``upper limit [Fe VI]''

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