SX Arietis variables are a class of variable stars. They are generally B-type main sequence stars of spectral types B0p to B9p— high-temperature analogues of Alpha2 Canum Venaticorum variables—and exhibit strong magnetic fields and intense He I and Si III spectral lines. They have brightness fluctuations of approximately 0.1 magnitudes with periods of about one day. The prototype of this class is 56 Arietis, which bears the variable star designation SX Arietis.
List 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 the V-band. Star Averagemagnitude Spectraltype Period(in days) Distance(in parsecs) 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 also an eclipsing binary 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
Notes
References
Samus N.N., Durlevich O.V., et al. Combined General Catalog of Variable Stars (GCVS4.2, 2004 Ed.)