J0526+5934: A peculiar ultra-short-period double white dwarf

Home

All issues

Volume 686 (June 2024)

A&A, 686 (2024) A221

Full HTML

Open Access

Table 1.

Orbital and stellar parameters for the visible component and the unseen companion of J0526+5934.

Binary	This work	Kosakowski et al. (2023b)	Lin et al. (2024)
Orbital period (s)	1232.00 ± 0.66	1230.37467 ± 0.00007	1230.374556 ± 0.000318
Orbital inclination (°)	65 ± 7	57.1 $_{- 4.1}^{+ 4.3}$ $^{+4.3}_{-4.1}$	68.2 $_{- 5.2}^{+ 3.7}$ $^{+3.7}_{-5.2}$
Systemic velocity (km s⁻¹)	−21.6 ± 2.2	−40.7 ± 4.1	−35.6 ± 4.4

Visible component

T_eff (K)	27 330 ± 370	27 300 ± 260	25 480 ± 360
log g (dex)	6.213 ± 0.050	6.37 ± 0.03	6.355 ± 0.068
M(M_⊙)	0.257 ± 0.049	0.378 $_{- 0.060}^{+ 0.066}$ $^{+0.066}_{-0.060}$	0.360 $_{- 0.071}^{+ 0.080}$ $^{+0.080}_{-0.071}$
R(R_⊙)	0.065 ± 0.005	0.070 ± 0.005	0.0661 ± 0.0054
[He/H] (dex)	−2.20 ± 0.03	−2.45 ± 0.06	−2.305 ± 0.062
K (km s⁻¹)	565.2 ± 3.2	558.3 ± 4.8	559.6 $_{- 6.5}^{+ 6.4}$ $^{+6.4}_{-6.5}$

Unseen WD

M(M_⊙)	$0 . 71_{- 0.06}^{+ 0.09}$ $0.71^{+0.09}_{-0.06}$	$0 . 887_{- 0.098}^{+ 0.110}$ $0.887^{+0.110}_{-0.098}$	$0 . 735_{- 0.069}^{+ 0.075}$ $0.735^{+0.075}_{-0.069}$
T_eff (K)	< 6700	–	–

Notes. We include the values measured by Kosakowski et al. (2023b) and Lin et al. (2024) for comparison.

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.