SX Arietis variable

File:SXAriLightCurve.png for SX Arietis (56 Arietis) from STEREO spacecraft data. Adapted from Wraight et al. (2012)]]

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 Alpha²Canum Venaticorum variables—and exhibit strong magnetic fields and intense He I and Si III spectral lines.{{citation

| title=Observing Variable Stars

| series=The Patrick Moore Practical Astronomy Series

| first1=Gerry A. | last1=Good | postscript=.

| publisher=Springer Science & Business Media

| year=2012 | isbn=9781447100553 | page=139

| url=https://books.google.com/books?id=4cS9BwAAQBAJ&pg=PT139 }} 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.

border="1" class="wikitable sortable" style="width:95%; text-align:center;"

----

! 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

| 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

{{reflist|refs=

{{cite journal |last1=Wraight |first1=K. T. |last2=Fossati |first2=L. |last3=Netopil |first3=M. |last4=Paunzen |first4=E. |last5=Rode-Paunzen |first5=M. |last6=Bewsher |first6=D. |last7=Norton |first7=A. J. |last8=White |first8=Glenn J. |title=A photometric study of chemically peculiar stars with the STEREO satellites – I. Magnetic chemically peculiar stars |journal=Monthly Notices of the Royal Astronomical Society |date=February 2012 |volume=420 |issue=1 |pages=757–772 |doi=10.1111/j.1365-2966.2011.20090.x |doi-access=free |arxiv=1110.6283 |bibcode=2012MNRAS.420..757W }}

}}

Samus N.N., Durlevich O.V., et al. Combined General Catalog of Variable Stars (GCVS4.2, 2004 Ed.)