Cyclotron emitting magnetic white dwarfs in post common-envelope binaries discovered with the Zwicky Transient Facility

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Volume 696 (April 2025)

A&A, 696 (2025) A242

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Table B.1.

Overview of the low-accretion rate magnetic white dwarfs in PCEBs discovered or recovered by their ZTF light curves. Already known wind-accreting magnetic white dwarfs are printed in italics: ¹: Linnell et al. (2010), ²: Szkody et al. (2003), ³: Drake et al. (2014), ⁵: Guidry et al. (2021). ⁴ has recently been mentioned by Ren et al. (2023) although the identification was purely based on the ZTF light curve. We include these three objects in this table because we blindly recovered them using the ZTF data and obtained a spectrum for them. The G-band magnitude is taken from Gaia dr3 and the distance is taken from Bailer-Jones et al. (2021). The orbital period for each object is determined from the ZTF light curve, the white dwarf temperature is determined from a fit to the SED, and the magnetic field strength is determined using equation 1 based on the detected cyclotron peaks in the optical spectra. The donor mass is estimated based on the observed K-band magnitude and Gaia parallax. In turn, the Roche lobe fill factor (RLFF) is based on the radius as estimated from the mass and should be interpreted with caution.

distance

P_Orb

WD temp

Sp. type

M₂

RLFF

B-field

spectra

Peaks

Harmonics

AB mag

M_⊙

Candidate wind-accreting systems

ZTF J005400.33+142931.4

17.40

393_{- 15}^{+ 18}

$393^{+18}_{-15}$

4.12

11 . 1_{- 0.3}^{+ 0.3}

$11.1_{-0.3}^{+0.3}$

M3.5

0.461 ± 0.023

1.04 ± 0.03

110.5 ± 0.5

SEDM, LRIS, DIS

4856 (g), 3230

2, 3

ZTF J011655.02+441745.2

18.70

923_{- 171}^{+ 275}

$923^{+275}_{-171}$

4.30

12 . 0_{- 1.5}^{+ 1.8}

$12.0_{-1.5}^{+1.8}$

M2.0

0.41 ± 0.08

0.95 ± 0.09

LRIS

7315? (i), 5486 (g, r), 4389 (g), 3657

3, 4, 5, 6

ZTF J025740.49+332808.3

18.91

243_{- 13}^{+ 16}

$243^{+16}_{-13}$

3.49

8 . 1_{- 0.5}^{+ 0.8}

$8.1_{-0.5}^{+0.8}$

M6.0

0.166 ± 0.013

0.69 ± 0.03

204/102

SEDM, DIS

5260 (g)

1/2

ZTF J051623.71+035400.3

18.68

223_{- 11}^{+ 13}

$223^{+13}_{-11}$

3.42

6 . 6_{- 0.4}^{+ 0.3}

$6.6_{-0.4}^{+0.3}$

M4.0

0.155 ± 0.013

0.67 ± 0.03

52.5 ± 1

Kast

6806 (r), 5104 (g)

3, 4

ZTF J054247.38+051856.1

19.15

342_{- 30}^{+ 32}

$342^{+32}_{-30}$

2.55

7 . 0_{- 0.8}^{+ 0.8}

$7.0_{-0.8}^{+0.8}$

M4.0

0.205 ± 0.025

0.95 ± 0.06

DBSP

6155 (r), 4103 (g)

2?, 3

ZTF J054800.74+263821.4

16.66

193_{- 3}^{+ 3}

$193^{+3}_{-3}$

3.93

7 . 9_{- 1.1}^{+ 1.1}

$7.9_{-1.1}^{+1.1}$

M4.5

0.371 ± 0.019

0.95 ± 0.03

70.5 ± 0.5

DBSP

7574 (i), 5049 (g), 3787

2?, 3, 4

ZTF J064618.65+395837.9

20.03

1410_{- 545}^{+ 1010}

$1410^{+1010}_{-545}$

3.51

M4.0

48 ± 0.5

LRIS

7595 (i), 5696 (r), 4557 (g)

3, 4, 5

ZTF J090018.54+621657.4

16.91

277_{- 4}^{+ 4}

$277^{+4}_{-4}$

6.37

8 . 4_{- 0.4}^{+ 0.5}

$8.4_{-0.4}^{+0.5}$

M3.5

0.428 ± 0.022

0.75 ± 0.02

49.5 ± 0.1

SEDM

7226? (i), 5420 (g), 4336 (g)

3, 4, 5

WX LMi¹

16.34

96 . 8_{- 0.5}^{+ 0.5}

$96.8^{+0.5}_{-0.5}$

2.78

8 . 3_{- 0.6}^{+ 0.7}

$8.3_{-0.6}^{+0.7}$

M5.0

0.222 ± 0.011

0.93 ± 0.02

69.9

DBSP, SDSS

5100 (g)

ZTF J121804.90+340921.9

19.04

364_{- 36}^{+ 52}

$364^{+52}_{-36}$

2.60

8 . 5_{- 0.7}^{+ 0.7}

$8.5_{-0.7}^{+0.7}$

M3.5

0.20 ± 0.027

0.92 ± 0.06

55 ± 0.5

SEDM

6490 (r), 4868 (g), 3894

3, 4, 5

ZTF J123903.50+704136.9

17.89

169_{- 2}^{+ 2}

$169^{+2}_{-2}$

3.75

6 . 7_{- 0.6}^{+ 0.7}

$6.7_{-0.6}^{+0.7}$

M5.0

0.186 ± 0.009

0.70 ± 0.02

159 ± 0.5

DBSP

6730 (r)

ZTF J153134.34+020458.8

18.46

307_{- 16}^{+ 16}

$307^{+16}_{-16}$

3.86

9 . 1_{- 0.7}^{+ 1.0}

$9.1_{-0.7}^{+1.0}$

M5.5

0.251 ± 0.017

0.79 ± 0.03

52.5 ± 0.5

SEDM

6860 (r), 5150 (g)

3, 4

MQ Dra²

17.34

181_{- 2}^{+ 2}

$181^{+2}_{-2}$

4.39

7 . 8_{- 0.5}^{+ 0.5}

$7.8_{-0.5}^{+0.5}$

M5.0

0.231 ± 0.011

0.70 ± 0.02

59.2 ± 0.2

SEDM

5970 (r), 4477 (g)

3, 4

ZTF J172333.86+342730.8

18.08

286_{- 5}^{+ 5}

$286^{+5}_{-5}$

3.50

8 . 8_{- 1.4}^{+ 2.0}

$8.8_{-1.4}^{+2.0}$

M7.0

0.428 ± 0.024

1.11 ± 0.03

174/87/58

SEDM

6155 (r)

1/2/3?

ZTF J192001.0+772415.1

18.67

821_{- 98}^{+ 119}

$821^{+119}_{-98}$

5.50

8 . 4_{- 1.5}^{+ 1.4}

$8.4_{-1.5}^{+1.4}$

M4.0

0.52 ± 0.05

0.92 ± 0.05

53?

DBSP

6730? (r), 5050? (g)

3?,4?

ZTF J200034.84-143534.4

18.58

357_{- 26}^{+ 28}

$357^{+28}_{-26}$

3.44

9 . 4_{- 0.9}^{+ 1.3}

$9.4_{-0.9}^{+1.3}$

M5.5

0.333 ± 0.027

0.98 ± 0.04

83.5 ± 0.5

IDS

6405 (r), 4270 (g)

2,3

SDSS J222918.97+185340.2³

16.51

570_{- 37}^{+ 41}

$570^{+41}_{-37}$

4.54

11 . 5_{- 0.4}^{+ 0.5}

$11.5_{-0.4}^{+0.5}$

M3.0

0.460 ± 0.023

0.97 ± 0.03

82.5 ± 0.5

SEDM

6451 (r), 4301 (g)

2,3

ZTF J233512.60+365140.0

18.78

565_{- 47}^{+ 60}

$565^{+60}_{-47}$

3.93

M4.0

0.416 ± 0.037

1.01 ± 0.05

79.5 ± 0.5

SEDM, DIS

6744 (r), 4496 (g)

2,3

Candidate polars/period-bounce polars

ZTF J011242.44+582757.1⁴

17.97

364_{- 12}^{+ 14}

$364^{+14}_{-12}$

1.35

late-M

0.176 ± 0.013

DBSP

ZTF J014635.74+491443.1⁵

16.99

56 . 6_{- 0.3}^{+ 0.3}

$56.6^{+0.3}_{-0.3}$

2.06

8 . 9_{- 0.5}^{+ 0.5}

$8.9_{-0.5}^{+0.5}$

BD?

90 ± 1

SEDM

5904 (r), 3979

2, 3

ZTF J034316.61-165535.8

19.19

973_{- 153}^{+ 197}

$973^{+197}_{-153}$

1.35

BD?

DBSP

ZTF J114419.43+365747.1

19.91

244_{- 24}^{+ 27}

$244^{+27}_{-24}$

1.82

8 . 0_{- 0.4}^{+ 0.4}

$8.0_{-0.4}^{+0.4}$

BD?

SDSS

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