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S Crucis

{{Short description|Variable star in the constellation Crux}}

{{Starbox begin}}

{{Starbox observe

|constell= Crux

| epoch = J2000.0

| ra = {{RA|12|54|21.99728}}

| dec = {{DEC|-58|25|50.2146}}

| appmag_v = 6.22 - 6.92

}}

{{Starbox character

| class = F6-G1Ib-II

| variable = δ Cep

}}

{{Starbox astrometry

| radial_v = {{val|-6.10}} {{nowrap|({{val|-21.1}} - {{val|5.9}})}}

| prop_mo_ra = {{val|-9.480}}

| prop_mo_dec = {{val|3.987}}

| parallax = 1.0215

| p_error = 0.0448

| parallax_footnote =

| absmag_v = -3.27

}}

{{Starbox detail

| mass =

| temperature = 5,517 - 6,482

| radius = 37.9

| luminosity =

| metal_fe = {{val|-0.07}} - {{val|0.16}}

| gravity = 1.2 - 1.9

| age_myr = 116

}}

{{Starbox catalogue

| names={{odlist|CD= -57°4766|HD= 112044|HIP= 62986|HR= 4895|SAO= 240362}}

}}

{{Starbox reference

| Simbad = S+Crucis

}}

{{Starbox end}}

File:S Crucis TESS lightcurve.png of the classical Cepheid variable S Crucis recorded by NASA's Transiting Exoplanet Survey Satellite (TESS)]]

S Crucis is a star in the constellation Crux. A Cepheid variable, its apparent magnitude ranges from 6.22 to 6.92 over {{val|4.68997|ul=days}}. It is a yellow-white supergiant that pulsates between spectral types F6Ib-II and G1Ib-II.

S Crucis is a pulsating variable star of the δ Cephei type, a Classical Cepheid variable. Its mean radius is {{solar radius|37.9|link=y}} and that radius varies by up to {{solar radius|4.1}} during its 4.7-day pulsation cycle. Over the same cycle, the effective temperature varies between {{val|5,517|fmt=commas|ul=K}} and {{val|6,482|fmt=commas|u=K}}. The star is thought to be 116 million years old; it has exhausted its core hydrogen and left the main sequence.

References

{{reflist|refs=

{{cite simbad|title=V* S Cru|accessdate =12 March 2014}}

{{cite DR2|6060173364061645696}}

{{cite web|url=http://www.aavso.org/vsx/index.php?view=detail.top&oid=10770 |title=S Crucis |author=Watson, Christopher |date=4 January 2010 |work=AAVSO Website|publisher=American Association of Variable Star Observers|accessdate=12 March 2014}}

{{cite journal|bibcode=2005AcA....55..247M|title=Mean Angular Diameters and Angular Diameter Amplitudes of Bright Cepheids|journal=Acta Astronomica|volume=55|pages=247|last1=Moskalik|first1=P.|last2=Gorynya|first2=N. A.|year=2005|arxiv = astro-ph/0507076 }}

{{cite journal |bibcode= 2006AstL...32..759G |title= Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system |journal= Astronomy Letters |volume= 32 |issue= 11 |pages= 759–771 |last1= Gontcharov |first1= G. A. |year= 2006 |doi= 10.1134/S1063773706110065 |arxiv= 1606.08053 |s2cid= 119231169 }}

{{cite journal |bibcode=2018A&A...616A..82P |title=A new and homogeneous metallicity scale for Galactic classical Cepheids. I. Physical parameters |journal=Astronomy and Astrophysics |volume=616 |pages=A82 |last1=Proxauf |first1=B. |last2=Da Silva |first2=R. |last3=Kovtyukh |first3=V. V. |last4=Bono |first4=G. |last5=Inno |first5=L. |last6=Lemasle |first6=B. |last7=Pritchard |first7=J. |last8=Przybilla |first8=N. |last9=Storm |first9=J. |last10=Urbaneja |first10=M. A. |last11=Valenti |first11=E. |last12=Bergemann |first12=M. |last13=Buonanno |first13=R. |last14=d'Orazi |first14=V. |last15=Fabrizio |first15=M. |last16=Ferraro |first16=I. |last17=Fiorentino |first17=G. |last18=François |first18=P. |last19=Iannicola |first19=G. |last20=Laney |first20=C. D. |last21=Kudritzki |first21=R. -P. |last22=Matsunaga |first22=N. |last23=Nonino |first23=M. |last24=Primas |first24=F.|author24-link=Francesca Primas |last25=Romaniello |first25=M. |last26=Thévenin |first26=F. |year=2018 |arxiv=1805.00727 |doi=10.1051/0004-6361/201833087 |s2cid=119078747 }}

{{cite journal |bibcode=2013AstL...39..851M |title=Properties of the population of classical Cepheids in the Galaxy |journal=Astronomy Letters |volume=39 |issue=12 |pages=851 |last1=Marsakov |first1=V. A. |last2=Koval' |first2=V. V. |last3=Kovtyukh |first3=V. V. |last4=Mishenina |first4=T. V. |year=2013 |doi=10.1134/S1063773713120050 |s2cid=119788977 }}

{{cite journal |bibcode=2011MNRAS.413..942M |title=CORS Baade-Wesselink method in the Walraven photometric system: The period-radius and the period-luminosity relation of classical Cepheids |journal=Monthly Notices of the Royal Astronomical Society |volume=413 |issue=2 |pages=942 |last1=Molinaro |first1=R. |last2=Ripepi |first2=V. |last3=Marconi |first3=M. |last4=Bono |first4=G. |last5=Lub |first5=J. |last6=Pedicelli |first6=S. |last7=Pel |first7=J. W. |year=2011 |doi=10.1111/j.1365-2966.2010.18183.x |arxiv=1012.4376 |doi-access=free }}

}}

{{Stars of Crux}}

{{DEFAULTSORT:S Crucis}}

Category:Crux

Category:Classical Cepheid variables

Crucis, S

Category:Durchmusterung objects

112044

062986

4895

Category:F-type bright giants

Category:F-type supergiants

Category:G-type supergiants

Category:G-type bright giants