SX Arietis variables are a class ofvariable stars. They are generallyB-type main sequence stars of spectral types B0p to B9p— high-temperature analogues ofAlpha2Canum Venaticorum variables—and exhibit strongmagnetic fields and intenseHe I andSi IIIspectral lines.[2] They have brightness fluctuations of approximately 0.1magnitudes with periods of about one day. The prototype of this class is56 Arietis, which bears thevariable star designationSX Arietis.
The following list contains selected SX Arietis variable that are of interest to amateur or professional astronomy. Unless otherwise noted, the given magnitudes are in theV-band.
| Star | Average magnitude | Spectral type | Period (in days) | Distance (inparsecs) |
|---|---|---|---|---|
| Alpha Sculptoris | 4.27 | B7IIIp | 238 | |
| Sigma Lupi | 4.42 | B2III | 3.02 | 176 |
| HD 125823 | 4.42 | B7IIIpv | 8.82 | 140 |
| HR 2949 | 4.43 | B5IV | 1.90 | 113 |
| 28 Cygni | 4.93 | B2.5Ve | 0.70 | 317 |
| 36 Lyncis | 5.29 | B9 | 3.83 | 178 |
| HD 142990 | 5.43 | B5V | 0.98 | 170 |
| V692 Coronae Australis | 5.46 | B2.5III | 1.67 | 357 |
| HD 21699 | 5.46 | B8IIImnp | 2.48 | 186 |
| 56 Arietis | 5.76 | B6IV-V | 0.73 | 154 |
| HD 133880 | 5.79 | B8IVSi | 0.88 | 111 |
| HD 28843 | 5.81 | B9III | 1.37 | 146 |
| 3 Scorpii | 5.87 | B8III/IV | 1.46 | 158 |
| V957 Scorpii | 5.90 | B6V | 258 | |
| V929 Scorpii | 5.92 | B8V | 1.49 | 161 |
| HR 7355 | 6.02 | B2Vn | 0.52 | 273 |
| HD 145792 | 6.42 | B6IV | 1.70 | 144 |
| HD 37017 | 6.56 | B1.5V | [n 1] | 380 |
| Sigma Orionis E | 6.61 | B2Vp | 1.19 | 329 |
| HD 37776 | 6.96 | B2V | 1.54 | 330 |
| HD 37058 | 7.30 | B3Vp | 15.26 | |
| HD 184927 | 7.44 | B2V | 9.35 | 543 |
| HD 191612 | 7.80 | O8fpe | 538 | 2041 |
| HD 35298 | 7.91 | B7IV | 1.85 | 532 |
| HD 36668 | 8.05 | B8V | 2.12 | 249 |
| HD 34626 | 8.16 | B1.5IVnp | 0.50 | 483 |
Samus N.N., Durlevich O.V., et al.Combined General Catalog of Variable Stars (GCVS4.2, 2004 Ed.)
| Pulsating |
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|---|---|---|---|---|---|---|---|---|---|
| Eruptive |
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| Cataclysmic | |||||||||
| Rotating |
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| Eclipsing | |||||||||
