Magnetic braking below the cataclysmic variable period gap and the observed dearth of period bouncers

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Volume 686 (June 2024)

A&A, 686 (2024) L19

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Table B.1.

Known period bouncers with either a well-measured donor mass or accretion rate.

Name	P_orb/hr	Ecl.?	M₂/M_⊙	M_WD/M_⊙	R_WD/0.01 R_⊙	T_eff, WD/K	Ṁ₂/10⁻¹⁰ M_⊙ yr⁻¹	Ref.
EZ Lyn	1.430	Yes	0.042±0.014	0.85±0.01	0.94	11250±40	0.242 $_{- 0.003}^{+ 0.003}$ $^{+0.003}_{-0.003}$	1
SDSSJ1035+0551	1.370	Yes	0.052±0.002	0.94±0.01	0.87±0.01	10100±200	0.12 $_{- 0.005}^{+ 0.005}$ $^{+0.005}_{-0.005}$	2
SDSSJ1057+2759	1.510	Yes	0.0436±0.002	0.80±0.015	1.04±0.017	13300±1100	0.54 $_{- 0.17}^{+ 0.14}$ $^{+0.14}_{-0.17}$	3
SDSSJ1433+1011	1.300	Yes	0.06±0.003	0.868±0.007	0.958±0.008	12800±200	0.38 $_{- 0.02}^{+ 0.02}$ $^{+0.02}_{-0.02}$	2
SDSSJ1501+5501	1.364	Yes	0.053±0.003	0.80±0.03	1.04±0.04	12500±200	0.426 $_{- 0.01}^{+ 0.009}$ $^{+0.009}_{-0.01}$	2
SRGeJ0411+6853	1.625	Yes		0.84±0.07	1.0±0.09	13790±500	0.56 $_{- 0.04}^{+ 0.04}$ $^{+0.04}_{-0.04}$	4
EG Cnc	1.439	No		1.03±0.05	0.77 $_{- 0.05}^{+ 0.06}$ $^{+0.06}_{-0.05}$	12290±55	0.2 $_{- 0.03}^{+ 0.03}$ $^{+0.03}_{-0.03}$	5
GD 552	1.712	No		0.78±0.04	1.07 $_{- 0.04}^{+ 0.05}$ $^{+0.05}_{-0.04}$	10760±40	0.25 $_{- 0.03}^{+ 0.02}$ $^{+0.02}_{-0.03}$	5
1RXS J1050–1404	1.476	No		0.77±0.03	1.08 $_{- 0.03}^{+ 0.04}$ $^{+0.04}_{-0.03}$	11520±50	0.34 $_{- 0.03}^{+ 0.02}$ $^{+0.02}_{-0.03}$	5
QZ Lib	1.539	No		0.82±0.19	1.01 $_{- 0.18}^{+ 0.23}$ $^{+0.23}_{-0.18}$	11420±200	0.28 $_{- 0.2}^{+ 0.1}$ $^{+0.1}_{-0.2}$	5
SDSS J1435+2336	1.300	No		0.84±0.07	1.0 $_{- 0.09}^{+ 0.08}$ $^{+0.08}_{-0.09}$	12000±160	0.32 $_{- 0.05}^{+ 0.05}$ $^{+0.05}_{-0.05}$	5
BW Scl	1.304	No	0.051±0.006	1.007±0.01	0.8 $_{- 0.011}^{+ 0.014}$ $^{+0.014}_{-0.011}$	15145±50	0.51 $_{- 0.008}^{+ 0.01}$ $^{+0.01}_{-0.008}$	5, 6
GW Lib	1.279	No		0.83±0.12	1.03 $_{- 0.10}^{+ 0.15}$ $^{+0.15}_{-0.10}$	16166±350	1.09 $_{- 0.34}^{+ 0.26}$ $^{+0.26}_{-0.34}$	5
WZ Sge	1.360	No		0.80±0.02	1.05 $_{- 0.03}^{+ 0.03}$ $^{+0.03}_{-0.03}$	13190±115	0.53 $_{- 0.01}^{+ 0.01}$ $^{+0.01}_{-0.01}$	5

Notes. The accretion rates are derived from WD mass and temperature estimates (see Eq. C.1). Ecl. stands for eclipsing.

References. (1) Amantayeva et al. (2021); (2) Littlefair et al. (2008); (3) McAllister et al. (2017); (4) Galiullin et al. (2024); (5) Pala et al. (2022); (6) Neustroev & Mäntynen (2023).

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