Table 1.
Currently known AM CVn stars ordered by increasing period, either the orbital period (most reliably determined from spectroscopic observations) or the superhump period (sh) which is typically within a few percent longer than the orbital period.
| Source | Period | Outbursts? | Mag. Range | Reference | Parallax | σ | Distance | σ |
|---|---|---|---|---|---|---|---|---|
| (mins) | (filter) | (mas) | (mas) | (pc) | (pc) | |||
| HM Cnc | 5.4 | ✗ | 21.1 | 1 | ||||
| V407 Vul | 9.5 | ✗ | 19.9 (V) | 2 | 0.095 | 0.327 | 1786 | 667 |
| ES Cet | 10.4 | ✗ | 16.5–16.8 | 3 | 0.596 | 0.108 | 1584 | 291 |
| SDSS J1351-0643 | 15.7 | ✗ | 18.6 | 43 | 0.596 | 0.313 | 1317 | 531 |
| AM CVn | 17.1 | ✗ | 14.2 | 4 | 3.351 | 0.045 | 299.1 | 4.4 |
| SDSS J1908+3940 | 18.1 | ✗ | 16.1 | 5, 6 | 0.954 | 0.046 | 1044 | 51 |
| HP Lib | 18.4 | ✗ | 13.6–13.7 | 7 | 3.62 | 0.05 | 276 | 4 |
| PTF1 J1919+4815 | 22.5 | ✓ | 18.2–21.8 | 8 | 0.550 | 0.327 | 1339 | 555 |
| CX361 | 22.9 | ✗ | 17.6 | 9 | 1.016 | 0.146 | 971 | 156 |
| ASASSN-14cc | 22.5 (sh) | ✓ | 16.0–20.0 (V) | 10 | 0.975 | 0.098 | 1019 | 108 |
| CR Boo | 24.5 | ✓ | 13.8–17.0 | 11 | ||||
| KL Dra | 25.0 | ✓ | 16.0–19.6 | 12 | 1.035 | 0.149 | 956 | 153 |
| PTF1 J2219+3135 | 26.1 (p) | ✓ | 16.2–20.6 | 14 | ||||
| V803 Cen | 26.6 | ✓ | 12.8–17.0 | 13, 14 | ||||
| PTF1 J0719+4858 | 26.8 | ✓ | 15.8–19.4 | 15 | 1.144 | 0.301 | 861 | 304 |
| ASASSN-15kf | 27.7 (sh) | ✓ | 15.0 (V) –19.4 (B) | 16, 17 | ||||
| YZ LMi (SDSS J0926+3624) | 28.3 | ✓ | 16.6–19.6 | 18 | 1.824 | 0.549 | 577 | 324 |
| CP Eri | 28.4 | ✓ | 16.2–20.2 | 19 | 0.684 | 0.941 | 964 | 615 |
| SDSS J1043+5632 | 28.5:(p) | ✓ | 17.0–20.3 | 14 | 0.830 | 0.668 | 979 | 575 |
| CRTS J0910-2008 | 29.7 (sh) | ✓ | 14.0–20.4 (g) | 45 | 0.695 | 0.477 | 1113 | 561 |
| PTF1 J0943+1029 | 30.4 | ✓ | 16.9 (R)–20.7 (g) | 20 | ||||
| CRTS J0105+1903 | 31.6 | ✓ | 16.3-19.6 | 21, 22 | 1.382 | 0.457 | 734 | 374 |
| PTF1 J1632+3511 | 32.7 (p) | ✓ | 17.9–23.0 | 20 | ||||
| CRTS J0744+3254 | 33: (p) | ✓ | 17.4–21.1 | 14 | ||||
| V406 Hya | 33.8 | ✓ | 14.5–19.7 | 23 | 2.391 | 1.050 | 504 | 493 |
| PTF1J0435+0029 | 34.3 | ✓ | 18.4 (R) – 22.3 (g) | 20 | ||||
| SDSS J1730+5545 | 35.2 | ∼ | 18.5 (V) –20.1 | 14, 24a | 1.061 | 0.382 | 911 | 420 |
| V558 Vir (2QZ J1427-0123) | 36.6 (sh) | ✓ | 15.0–20.5 | 25 | 1.911 | 1.425 | 677 | 595 |
| SDSS J1240-0159 | 37.4 | ✓ | 16.8–19.8 | 27 | 1.857 | 0.611 | 577 | 365 |
| NSV1440 | 37.5 (sh) | ✓ | 12.4(V) – 17.9(G) | 45 | 2.971 | 0.142 | 337 | 17 |
| V744 And (SDSS J0129+3842) | 37.6 | ✓ | 14.5–19.8 | 14, 26, 29 | 2.066 | 0.529 | 508 | 239 |
| SDSS J1721+2733 | 38.1 | ✓ | 16.0–20.1 | 14, 31 | 0.798 | 0.665 | 995 | 578 |
| ASASSN-14mv | 41: (sh) | ✓ | 11.8 (V) – 18.1 (V) | 16, 17, 44 | 4.069 | 0.119 | 247 | 7 |
| ASASSN-14ei | 43: (sh) | ✓ | 11.9–17.6 (B) | 17, 33 | 3.92 | 0.045 | 255 | 4 |
| SDSS J1525+3600 | 44.3 | ✗ | 20.2 | 31 | 1.928 | 0.276 | 524 | 90 |
| SDSS J0804+1616 | 44.5 | ✓ | 17.8–19.0 | 28, 30 | 1.203 | 0.210 | 828 | 173 |
| SDSS J1411+4812 | 46.0 | ✓ | 12.4–19.7 | 29, 30, 48 | 2.361 | 0.305 | 429 | 65 |
| GP Com | 46.6 | ✗ | 15.9–16.3 | 32 | 13.731 | 0.060 | 73.0 | 0.4 |
| CRTS J0450-0931 | 47.3 (sh) | ✓ | 14.8–20.5 | 34 | ||||
| SDSS J0902+3819 | 48.3 | ✓ | 13.8 (V) – 20.2 (g) | 15, 31, 35 | 2.519 | 0.936 | 461 | 435 |
| Gaia14aae | 49.7 | ✓ | 13.6 (V) – 18.7 (g) | 36, 49 | 3.871 | 0.155 | 259 | 11 |
| ASASSN-17fp | 51.0 (sh) | ✓ | 15.7–20+ | 37 | ||||
| SDSS J1208+3550 | 53.0 | ✗ | 18.9–19.4 | 30, 38, 39 | 5.005 | 0.416 | 202 | 18 |
| SDSS J1642+1934 | 54.2 | ✗ | 20.3 | 31, 39 | 0.621 | 0.730 | 1044 | 604 |
| SDSS J1552+3201 | 56.3 | ✗ | 20.2–20.6 | 30, 41 | 2.395 | 0.609 | 443 | 227 |
| SDSS J1137+4054 | 59.6: | ✗ | 19.0 | 24b | 4.838 | 0.310 | 209 | 14 |
| V396 Hya | 65.1 | ✗ | 17.6 | 42 | 10.694 | 0.148 | 93.6 | 1.4 |
| SDSS J1319+5915 | 65.6 | ✗ | 19.1 | 40,47 | 4.894 | 0.240 | 205 | 10 |
| PU Aqr (SDSS J2047+0008) | ? | ✓ | 17.0–24 | 38 | ||||
| CRTS J0844-0128 | ? | ✓ | 17.4–20.3 | 14 | 0.395 | 0.341 | 1474 | 597 |
| PTF1 J0857+0729 | ? | ✓ | 18.6–21.8 | 14 | ||||
| SDSS J1505+0659 | ? | ✗ | 19.1 | 24b | 6.299 | 0.453 | 160 | 12 |
| PTF1 J1523+1845 | ? | ✓ | 17.6–23.5 | 14 | ||||
| ASASSN-14fv | ? | ✓ | 14.6 (V) – 20.5 (B) | 41 | ||||
| Gaia16all | ? | ✓ | 16.2 – 20.6(G) | 46 | 0.760 | 0.859 | 956 | 605 |
| SDSS J0807+4852 | ? | ✗ | 19.5(V)–20.4(g) | 50 | 0.055 | 2.42 | 883 | 648 |
Notes. (p) implies the predicted orbital period based on the outburst properties (Levitan et al. 2015). ✓ or ✗ indicates whether the source has been seen in outburst. The references and full coordinates are given in Appendix A.2.
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