The post-common-envelope, binary central star of the planetary nebula Hen 2-11

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Volume 562 (February 2014)

A&A, 562 (2014) A89

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Table 2

Modelled and observed binary parameters.

	Primary	Secondary

T_eff (K)	140 000 ± 30 000	4500 ± 500
Radius (R_⊙)	0.13 ± 0.02	0.68 ± 0.03
Log g	–	4.5^a
Inclination	90° ± 0.5°
	0.91

Period (d)	0.6093 ± 0.0003

Peak-to-peak I-mag amplitude of irradiation effect	1.12 ± 0.07
Min. I-mag of sinusoidal region of lightcurve	16.80 ± 0.05^b
Eclipse I-mag	18.40 ± 0.05^c
Extinction-corrected min. V-mag of sinusoidal region	13.82 ± 0.08^d
Extinction-corrected eclipse V-mag	17.36 ± 0.08^e

Notes.

^(a)

A fixed parameter in the modelling.

^(b)

Measured value, not accounting for nebular contamination of roughly 10% at this phase.

^(c)

Measured value, not accounting for nebular contamination of roughly 25% at this phase.

^(d)

Corrected using the measured c(Hβ) = 2.42 ± 0.04, and a representative (V − I)₀ = −0.4 for the nebular progenitor (Ciardullo et al. 1999).

^(e)

Corrected using the measured c(Hβ) = 2.42 ± 0.04, and assuming that the modelled temperature is representative of the spectral type of the secondary (see text for details).

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