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Table 2.

Parameters of MS−BD binaries inferred from WD−BD binaries using a population synthesis technique.

System MMS Initial Period Periodpre − CE αCE
/M /day /day
SDSS J1411+2009 1.02 − 1.44 336 − 583 387 − 978 0.12 − 0.41
SDSS J1205−0242 1.00 − 1.48 72 − 178 74 − 219 0.14 − 0.90
WD 1032+011 1.00 − 1.24 137 − 430 150 − 721 0.09 − 0.45
ZTF J0038+2030 1.00 − 1.10 402 − 486 738 − 1004 0.45 − 0.95
WD 0137−349 1.00 − 1.56 65 − 213 68 − 270 0.16 − 1.00
NLTT 5306 1.00 − 1.22 136 − 407 149 − 663 0.10 − 0.45
SDSS J1557+0916 1.00 − 1.72 123 − 409 127 − 667 0.09 − 1.00
EPIC 212235321 1.08 − 1.56 264 − 389 280 − 568 0.09 − 0.49

Notes. The initial period refers to the orbital period when the primary star starts its MS evolution. In our calculation, we have added minimum total age constraints on these systems.

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