Stars on the ascending helium giant branch - I. From white dwarf merger to helium giant: the evolutionary state of the rapidly rotating hot subdwarf HE 1518-0948

Open Access

Table 2.

Atmospheric and stellar parameters of HE 1518-0948.

Spectral analysis
T_eff (K)	52 000 ± 2500
log g (cgs)	4.64 ± 0.15
log(n_He/n_H)	3.5 ± 0.5
v_rot sin i (km s⁻¹)	90 ± 20
v_rad (km s⁻¹)	−108 ± 3
SED analysis
R(55)	2.62 ± 0.08
E(44 − 55) (mag)	0.109 ± 0.02
log(θ(rad))	−11.070 ± 0.009
Assuming M = 0.9 ± 0.1 M_⊙
d_spec (kpc)	$3 . 9_{- 0.7}^{+ 0.8}$ $Mathematical equation: $ 3.9^{+0.8}_{-0.7} $$
R/R_⊙	$0 . 73_{- 0.13}^{+ 0.15}$ $Mathematical equation: $ 0.73^{+0.15}_{-0.13} $$
log L/L_⊙	3.57 ± 0.18
Kinematic analysis
U (km s⁻¹)	$165_{- 20}^{+ 23}$ $Mathematical equation: $ 165^{+23}_{-20} $$
V (km s⁻¹)	$7_{- 36}^{+ 56}$ $Mathematical equation: $ 7^{+56}_{-36} $$
W (km s⁻¹)	$16_{- 16}^{+ 14}$ $Mathematical equation: $ 16^{+14}_{-16} $$
e	$0 . 94_{- 0.09}^{+ 0.05}$ $Mathematical equation: $ 0.94^{+0.05}_{-0.09} $$
L_z (Mpc km s⁻¹)	$0 . 01_{- 0.29}^{+ 0.22}$ $Mathematical equation: $ 0.01^{+0.22}_{-0.29} $$

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.