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.[2] 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.
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Variable star
Transcription
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 |
Average magnitude |
Spectral type |
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 | [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 |
Notes
- ^ also an eclipsing binary
References
- ^ Wraight, K. T.; Fossati, L.; Netopil, M.; Paunzen, E.; Rode-Paunzen, M.; Bewsher, D.; Norton, A. J.; White, Glenn J. (February 2012). "A photometric study of chemically peculiar stars with the STEREO satellites – I. Magnetic chemically peculiar stars". Monthly Notices of the Royal Astronomical Society. 420 (1): 757–772. arXiv:1110.6283. Bibcode:2012MNRAS.420..757W. doi:10.1111/j.1365-2966.2011.20090.x.
- ^ Good, Gerry A. (2012), Observing Variable Stars, The Patrick Moore Practical Astronomy Series, Springer Science & Business Media, p. 139, ISBN 9781447100553.
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 | |||||||||
This page was last edited on 2 May 2024, at 15:33