Discovery of three magnetic helium-rich hot subdwarfs with SALT

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Table A.2

Best stellar parameters based on the combination of spectroscopic atmospheric parameters from Table 1, the Gaia parallax, and the SED’s angular diameter.

Star	log Θ/rad	E(44–55)/mag	ϖ/mas	R / R_⊙	L / L_⊙	M^spec / M_⊙	M^HeZAMS / M_⊙
J0415+2528^*	−11.476 ± 0.006	0.298 ± 0.004	0.49 ± 0.06	${0.151}_{- 0.016}^{+ 0.020}$ $0.151_{ - 0.016}^{ + 0.020}$	$97_{- 22}^{+ 31}$ $97_{ - 22}^{ + 31}$	${0.80}_{- 0.40}^{+ 0.60}$ $0.80_{ - 0.40}^{ + 0.60}$	0.82 ± 0.06
J0809–2627^†	−11.246 ± 0.005	0.072 ± 0.003	0.68 ± 0.04	${0.185}_{- 0.010}^{+ 0.011}$ $0.185_{ - 0.010}^{ + 0.011}$	$125_{- 17}^{+ 19}$ $125_{ - 17}^{ + 19}$	${1.06}_{- 0.24}^{+ 0.31}$ $1.06_{ - 0.24}^{ + 0.31}$	0.82 ± 0.03
J1303+2646^*	−11.517 ± 0.006	0.005 ± 0.003	0.33 ± 0.07	${0.210}_{- 0.040}^{+ 0.050}$ ${0.210_{ - 0.040}^{ + 0.050}}$	$200_{- 70}^{+ 120}$ ${200_{ - 70}^{ + 120}}$	${1.40}_{- 0.70}^{+ 2.40}$ ${1.40_{ - 0.70}^{ + 2.40}}$	0.90 ± 0.07
J1603+3412^*	−11.806 ± 0.006	0.027 ± 0.005	0.22 ± 0.07	${0.160}_{- 0.040}^{+ 0.070}$ ${0.160_{ - 0.040}^{ + 0.070}}$	$110_{- 50}^{+ 120}$ ${110_{ - 50}^{ + 120}}$	${1.00}_{- 0.50}^{+ 2.20}$ ${1.00_{ - 0.50}^{ + 2.20}}$	0.83 ± 0.06

J1233–6749	−11.270 ± 0.004	0.21 ± 0.01	0.66 ± 0.04	${0.181}_{- 0.009}^{+ 0.009}$ ${0.181_{ - 0.009}^{ + 0.009}}$	$153_{- 19}^{+ 21}$ ${153_{ - 19}^{ + 21}}$	${0.48}_{- 0.16}^{+ 0.22}$ ${0.48_{ - 0.16}^{ + 0.22}}$	0.88 ± 0.04
J1256–5753	−11.190 ± 0.005	0.25 ± 0.01	0.82 ± 0.03	${0.175}_{- 0.007}^{+ 0.007}$ ${0.175_{ - 0.007}^{ + 0.007}}$	$129_{- 14}^{+ 16}$ ${129_{ - 14}^{ + 16}}$	${0.74}_{- 0.24}^{+ 0.34}$ ${0.74_{ - 0.24}^{ + 0.34}}$	0.85 ± 0.03
J1444–6744	−11.141 ± 0.005	0.36 ± 0.01	0.77 ± 0.05	${0.210}_{- 0.013}^{+ 0.015}$ ${0.210_{ - 0.013}^{ + 0.015}}$	$173_{- 25}^{+ 31}$ ${173_{ - 25}^{ + 31}}$	${0.56}_{- 0.19}^{+ 0.27}$ ${0.56_{ - 0.19}^{ + 0.27}}$	0.86 ± 0.04

EC20577–5504	−11.542 ± 0.004	0.03 ± 0.01	0.54 ± 0.07	${0.117}_{- 0.013}^{+ 0.017}$ ${0.117_{ - 0.013}^{ + 0.017}}$	$58_{- 13}^{+ 19}$ ${58_{ - 13}^{ + 19}}$	${0.62}_{- 0.23}^{+ 0.36}$ ${0.62_{ - 0.23}^{ + 0.36}}$	0.80 ± 0.04
EC22332–6837	−11.584± 0.005	0.04 ± 0.01	0.33 ± 0.05	${0.177}_{- 0.022}^{+ 0.028}$ ${0.177_{ - 0.022}^{ + 0.028}}$	$140_{- 40}^{+ 50}$ ${140_{ - 40}^{ + 50}}$	${1.00}_{- 0.40}^{+ 0.60}$ ${1.00_{ - 0.40}^{ + 0.60}}$	0.86 ± 0.04
PG1625–034	−11.347 ± 0.003	0.23 ± 0.01	0.59 ± 0.05	${0.168}_{- 0.012}^{+ 0.014}$ ${0.168_{ - 0.012}^{ + 0.014}}$	$122_{- 20}^{+ 25}$ ${122_{ - 20}^{ + 25}}$	${0.54}_{- 0.18}^{+ 0.27}$ ${0.54_{ - 0.18}^{ + 0.27}}$	0.84± 0.04
J0714–2245	−11.180 ± 0.005	0.15 ± 0.01	0.76 ± 0.03	${0.192}_{- 0.008}^{+ 0.008}$ ${0.192_{ - 0.008}^{ + 0.008}}$	$130_{- 15}^{+ 17}$ ${130_{ - 15}^{ + 17}}$	${0.48}_{- 0.16}^{+ 0.24}$ ${0.48_{ - 0.16}^{ + 0.24}}$	0.82 ± 0.03
J1346–4025	−11.000 ± 0.005	0.07 ± 0.01	1.43 ± 0.05	${0.156}_{- 0.006}^{+ 0.006}$ ${0.156_{ - 0.006}^{ + 0.006}}$	$91_{- 10}^{+ 11}$ ${91_{ - 10}^{ + 11}}$	${0.58}_{- 0.18}^{+ 0.27}$ ${0.58_{ - 0.18}^{ + 0.27}}$	^‡
J1946–4756	−11.690 ± 0.005	0.04 ± 0.01	0.29 ± 0.08	${0.160}_{- 0.040}^{+ 0.060}$ ${0.160_{ - 0.040}^{ + 0.060}}$	$110_{- 40}^{+ 90}$ ${110_{ - 40}^{ + 90}}$	${0.61}_{- 0.28}^{+ 0.60}$ ${0.61_{ - 0.28}^{ + 0.60}}$	0.84± 0.05

Notes.^* Originally from Pelisoli et al. (2022).^† Originally from Dorsch et al. (2022).^‡ Too far away from the helium main sequence for a sensible mass estimate. Estimated systematic uncertainties of 1000 K in T_eff, 0.15 in log ɡ, and 0.1 in log n(He)/n(H) were added in quadrature to the statistical uncertainties for the computation of the radii R, luminosities L, and masses M. Stellar parameters are stated as median values with one sigma uncertainties. The last column states masses obtained by interpolation in the helium main sequence of Paczyński (1971), given the uncertainties on T_eff and L.

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