Astronomy:Beta Sculptoris

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Short description: Star in the constellation of Sculptor
β Sculptoris
Sculptor constellation map.svg
Red circle.svg
Location of β Sculptoris (circled)
Observation data
Equinox J2000.0]] (ICRS)
Constellation Sculptor
Right ascension  23h 32m 58.25898s[1]
Declination −37° 49′ 05.7570″[1]
Apparent magnitude (V) 4.37[2]
Characteristics
Spectral type B9.5IIIp(HgMnSi)[3]
U−B color index −0.36[2]
B−V color index −0.09[2]
Variable type suspected α2 CVn[4]
Astrometry
Radial velocity (Rv)+0.4±0.6[5] km/s
Proper motion (μ) RA: +95.97[1] mas/yr
Dec.: +38.29[1] mas/yr
Parallax (π)18.74 ± 0.15[1] mas
Distance174 ± 1 ly
(53.4 ± 0.4 pc)
Absolute magnitude (MV)0.74[6]
Details
Mass2.98[7] M☉
Radius2.0[8] R☉
Luminosity81[7] L☉
Surface gravity (log g)4.28[8] cgs
Temperature12,110[7] K
Metallicity [Fe/H]+0.15[6] dex
Rotation1.9311[9] d
Rotational velocity (v sin i)26[7] km/s
Other designations
β Scl, CD−38° 15527, FK5 886, GC 32744, HD 221507, HIP 116231, HR 8937, SAO 214615, GSC 08013-01357[10]
Database references
SIMBADdata

Beta Sculptoris, Latinized from β Sculptoris, is a single,[11] blue-white hued star in the southern constellation of Sculptor. It has an apparent visual magnitude of 4.37,[2] which is bright enough to be seen with the naked eye. Based upon an annual parallax shift of 18.74 mas as seen from Earth, it is located 174 light years from the Sun.

A light curve for Beta Sculptoris, adapted from Pedersen et al. (2019)[12]

This is a B-type giant star with a stellar classification of B9.5IIIp(HgMnSi).[3] It belongs to the class of chemically peculiar stars known as a Mercury-Manganese star,[13] showing overabundances of mercury, manganese, and silicon in its spectrum. It is a suspected α2 CVn variable with magnitude variation from 4.35 to 4.39.[4] The star has nearly three[7] times the mass of the Sun and double[8] the Sun's radius. It is radiating 81[7] times the Sun's luminosity from its photosphere at an effective temperature of 12,110 K.[7]

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 Van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics 474 (2): 653–664. doi:10.1051/0004-6361:20078357. Bibcode: 2007A&A...474..653V.  Vizier catalog entry
  2. ↑ 2.0 2.1 2.2 2.3 Ducati, J. R. (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system". CDS/ADC Collection of Electronic Catalogues 2237. Bibcode: 2002yCat.2237....0D. 
  3. ↑ 3.0 3.1 Abt, Helmut A.; Morrell, Nidia I. (1995). "The Relation between Rotational Velocities and Spectral Peculiarities among A-Type Stars". Astrophysical Journal Supplement 99: 135. doi:10.1086/192182. Bibcode: 1995ApJS...99..135A. 
  4. ↑ 4.0 4.1 Watson, C. L. (2006). "The International Variable Star Index (VSX)". The Society for Astronomical Sciences 25th Annual Symposium on Telescope Science. Held May 23–25 25: 47. Bibcode: 2006SASS...25...47W. 
  5. ↑ Gontcharov, G. A. (2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters 32 (11): 759–771. doi:10.1134/S1063773706110065. Bibcode: 2006AstL...32..759G. 
  6. ↑ 6.0 6.1 Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331. doi:10.1134/S1063773712050015. Bibcode: 2012AstL...38..331A.  Vizier catalog entry
  7. ↑ 7.0 7.1 7.2 7.3 7.4 7.5 7.6 Zorec, J.; Royer, F. (2012). "Rotational velocities of A-type stars". Astronomy & Astrophysics 537: A120. doi:10.1051/0004-6361/201117691. Bibcode: 2012A&A...537A.120Z.  Vizier catalog entry
  8. ↑ 8.0 8.1 8.2 Allende Prieto, C.; Lambert, D. L. (1999). "Fundamental parameters of nearby stars from the comparison with evolutionary calculations: Masses, radii and effective temperatures". Astronomy and Astrophysics 352: 555–562. Bibcode: 1999A&A...352..555A.  Vizier catalog entry
  9. ↑ Barraza, L. F.; Gomes, R. L.; Messias, Y. S.; Leão, I. C.; Almeida, L. A.; Janot-Pacheco, E.; Brito, A. C.; Brito, F. A. C. et al. (2022). "Rotation Signature of TESS B-type Stars. A Comprehensive Analysis". The Astrophysical Journal 924 (2): 117. doi:10.3847/1538-4357/ac3335. Bibcode: 2022ApJ...924..117B. 
  10. ↑ "bet Scl". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=bet+Scl. 
  11. ↑ Chini, R. et al. (2012), "A spectroscopic survey on the multiplicity of high-mass stars", Monthly Notices of the Royal Astronomical Society 424 (3): 1925, doi:10.1111/j.1365-2966.2012.21317.x, Bibcode: 2012MNRAS.424.1925C. 
  12. ↑ Pedersen, May G.; Chowdhury, Sowgata; Johnston, Cole; Bowman, Dominic M.; Aerts, Conny; Handler, Gerald; De Cat, Peter; Neiner, Coralie et al. (February 2019). "Diverse Variability of O and B Stars Revealed from 2-minute Cadence Light Curves in Sectors 1 and 2 of the TESS Mission: Selection of an Asteroseismic Sample". The Astrophysical Journal Letters 872 (1): L9. doi:10.3847/2041-8213/ab01e1. Bibcode: 2019ApJ...872L...9P. 
  13. ↑ Makaganiuk, V. et al. (January 2011), "The search for magnetic fields in mercury-manganese stars", Astronomy and Astrophysics 525: A97, doi:10.1051/0004-6361/201015666, Bibcode: 2011A&A...525A..97M. 



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