Two hot pre-white dwarfs inside the red giant branch planetary nebula Pa 13 - Double-core evolution or common-envelope-induced rejuvenation

Home

All issues

Volume 709 (May 2026)

A&A, 709 (2026) A112

Full HTML

Open Access

Table 2.

Orbital and stellar parameters of Pa 13.

	Star 1	Star 2
P [days]^(a)	0.3987674 ± 0.0000008
γ [km/s]	33.7 ± 0.8
q ≡ M₂/M₁	$0 . 95_{- 0.14}^{+ 0.15}$ $Mathematical equation: $ 0.95^{+0.15}_{-0.14} $$
i [°]	$81 . 2_{- 3.6}^{+ 0.6}$ $Mathematical equation: $ 81.2^{+0.6}_{-3.6} $$
e	0.02 ± 0.01
a [R_⊙]	2.1±0.1
d (Gaia) [kpc]	$6 . 9_{- 2.1}^{+ 4.8}$ $Mathematical equation: $ 6.9^{+4.8}_{-2.1} $$
E(44 − 55) [mag]	0.405 ± 0.005
T_eff [kK]	$50 . 0_{- 0.2}^{+ 1.5}$ $Mathematical equation: $ 50.0_{-0.2}^{+1.5} $$	$75 . 0_{- 22.0}^{+ 28.0}$ $Mathematical equation: $ 75.0_{-22.0}^{+28.0} $$
log g	4.85 ± 0.07	$5 . 60_{- 0.40}^{+ 0.30}$ $Mathematical equation: $ 5.60^{+0.30}_{-0.40} $$
log(He/H)	−1.14 ± 0.06	−1.00 ± 0.30
M [M_⊙]	0.41 ± 0.02	0.39 ± 0.04
L [L_⊙]	$903_{- 183}^{+ 271}$ $Mathematical equation: $ 903_{-183}^{+271} $$	$731_{- 645}^{+ 5120}$ $Mathematical equation: $ 731_{-645}^{+5120} $$
R [R_⊙]	0.40 ± 0.04	$0 . 16_{- 0.07}^{+ 0.08}$ $Mathematical equation: $ 0.16_{-0.07}^{+0.08} $$
R_Gaia [R_⊙]	$0 . 45_{- 0.14}^{+ 0.32}$ $Mathematical equation: $ 0.45^{+0.32}_{-0.14} $$	$0 . 19_{- 0.06}^{+ 0.13}$ $Mathematical equation: $ 0.19^{+0.13}_{-0.06} $$

Notes. He abundances are given in logarithmic number ratios relatively to H.

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.