Astronomy:48 Persei

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Short description: Star in the constellation Perseus
48 Persei
Perseus constellation map.svg
Red circle.svg
Location of 48 Persei (circled)
Observation data
Equinox J2000.0]] (ICRS)
Constellation Perseus
Right ascension  04h 08m 39.69216s[1]
Declination 47° 42′ 45.0429″[1]
Apparent magnitude (V) 4.03[2]
Characteristics
Spectral type B3Ve[3]
U−B color index -0.55[2]
B−V color index -0.03[2]
Variable type γ Cas[4]
Astrometry
Radial velocity (Rv)+0.80[5] km/s
Proper motion (μ) RA: +21.73[1] mas/yr
Dec.: -33.61[1] mas/yr
Parallax (π)6.84 ± 0.16[1] mas
Distance480 ± 10 ly
(146 ± 3 pc)
Absolute magnitude (MV)-1.86[6]
Details
Mass7.5[7] M☉
Luminosity600[6] L☉
Surface gravity (log g)3.86[8] cgs
Temperature17,490[8] K
Metallicity [Fe/H]-0.04[9] dex
Rotational velocity (v sin i)197[8] km/s
Other designations
c Persei, MX Persei, BD+47°939, FK5 152, GC 4967, HIP 19343, HR 1273, HD 25940, SAO 39336
Database references
SIMBADdata

48 Persei (also known as c Persei, 48 Per, HR 1273, HIP 19343, or HD 25940) is a Be star in the constellation Perseus, approximately the 500th brightest of the visible stars in apparent magnitude.[10] It is "well known for its complex spectrum and for its light and velocity variations".[11] The name "48 Persei" is a Flamsteed designation given to it by John Flamsteed in his catalogue, published in 1712.[12]

A light curve for MX Persei, plotted from Hipparcos data[13]

48 Persei is classified as a Gamma Cassiopeiae variable, and it has been given the variable star designation MX Persei. The star's brightness varies by 0.09 magnitudes in visible light.[14] Koen and Eyer examined the Hipparcos data for this star, and found it varied with a period of 5.0569 days.[15]

As a Be star, it is hot and blue, spinning so rapidly that it forms an unstable equatorial disk of matter surrounding it. Its mass has been estimated as seven times that of the Sun, and its estimated age of 40 million years makes it much younger than the Sun. In another few million years it will likely cease hydrogen fusion, expand, and brighten as it becomes a red giant.[16]

A 1989 study proposed 48 Persei to be a single-lined spectroscopic binary with a period of 16.6 days, but subsequent studies, including close imaging surveys, have not confirmed this result. Hutter et al. (2021) consider it to be a single star.[17]

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 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. ↑ Hoffleit, D.; Warren, W. H. (1995). "VizieR Online Data Catalog: Bright Star Catalogue, 5th Revised Ed. (Hoffleit+, 1991)". VizieR On-line Data Catalog: V/50. Originally Published in: 1964BS....C......0H 5050. Bibcode: 1995yCat.5050....0H. 
  4. ↑ Samus, N. N. et al. (2009). "VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)". VizieR On-line Data Catalog: B/GCVS. Originally Published in: 2009yCat....102025S 1. Bibcode: 2009yCat....102025S. 
  5. ↑ Evans, D. S. (1967). "The Revision of the General Catalogue of Radial Velocities". Determination of Radial Velocities and Their Applications 30: 57. Bibcode: 1967IAUS...30...57E. 
  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. ↑ Tetzlaff, N.; Neuhäuser, R.; Hohle, M. M. (2011). "A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun". Monthly Notices of the Royal Astronomical Society 410 (1): 190–200. doi:10.1111/j.1365-2966.2010.17434.x. Bibcode: 2011MNRAS.410..190T.  Vizier catalog entry
  8. ↑ 8.0 8.1 8.2 Zorec, J.; Frémat, Y.; Domiciano De Souza, A.; Royer, F.; Cidale, L.; Hubert, A.-M.; Semaan, T.; Martayan, C. et al. (2016). "Critical study of the distribution of rotational velocities of Be stars". Astronomy & Astrophysics 595: A132. doi:10.1051/0004-6361/201628760. Bibcode: 2016A&A...595A.132Z. 
  9. ↑ Wu, Yue; Singh, H. P.; Prugniel, P.; Gupta, R.; Koleva, M. (2010). "Coudé-feed stellar spectral library – atmospheric parameters". Astronomy & Astrophysics 525: A71. doi:10.1051/0004-6361/201015014. Bibcode: 2011A&A...525A..71W. 
  10. ↑ 48 Persei (HIP 19343), Ashland Astronomy Studio, http://www.astrostudio.org/xhip.php?hip=19343, retrieved 2012-12-28 .
  11. ↑ Percy, J. R.; Lane, M. C. (May 1977), "Search for Beta Cephei stars. I - Photometric and spectroscopic studies of northern B-type stars", Astronomical Journal 82: 353–359, doi:10.1086/112057, Bibcode: 1977AJ.....82..353P .
  12. ↑ Baily, Francis, ed. (1835), An account of the Revd. John Flamsteed, the first astronomer-royal: compiled from his own manuscripts, and other authentic documents, never before published. To which is added his British catalogue of stars, cor. and enl., Lords Commissioners of the Admiralty, p. 425, https://books.google.com/books?id=sHkAAAAAMAAJ&pg=PA425 .
  13. ↑ "/ftp/cats/more/HIP/cdroms/cats". Strasbourg astronomical Data Center. https://cdsarc.cds.unistra.fr/viz-bin/ftp-index?/ftp/cats/more/HIP/cdroms/cats. 
  14. ↑ "MX Per". AAVSO. https://www.aavso.org/vsx/index.php?view=detail.top&oid=25810. 
  15. ↑ Koen, Chris; Eyer, Laurent (March 2002). "New periodic variables from the Hipparcos epoch photometry". Monthly Notices of the Royal Astronomical Society 331 (1): 45–59. doi:10.1046/j.1365-8711.2002.05150.x. Bibcode: 2002MNRAS.331...45K. 
  16. ↑ Kaler, Jim (2009-01-16), "48 Per (48 Persei)", STARS (University of Illinois), http://stars.astro.illinois.edu/sow/48per.html, retrieved 2012-12-28 .
  17. ↑ Hutter, D. J.; Tycner, C.; Zavala, R. T.; Benson, J. A.; Hummel, C. A.; Zirm, H. (2021). "Surveying the Bright Stars by Optical Interferometry. III. A Magnitude-limited Multiplicity Survey of Classical Be Stars". The Astrophysical Journal Supplement Series 257 (2): 69. doi:10.3847/1538-4365/ac23cb. Bibcode: 2021ApJS..257...69H. 

Further reading

  • Jackisch, G. (1963), "Photoelectric and Spectroscopic Observations of 48 Persei and 53 Persei", Information Bulletin on Variable Stars 40: 1, Bibcode: 1963IBVS...40....1J .
  • Baliunas, S. D.; Ciccone, M. A.; Guinan, E. F.; Miskinis, P. (1975), "Photoelectric Study of the Bright Be Stars γ Cas, 48 Per, ψ Per, and φ Per.", Bulletin of the American Astronomical Society 7: 252, Bibcode: 1975BAAS....7Q.252B .
  • Goraya, P. S. (1985), "Recent changes in the spectrum of the Be star 48 Persei", Astrophysics and Space Science 109 (2): 373–380, doi:10.1007/BF00651283, Bibcode: 1985Ap&SS.109..373G .
  • Tur, N. S.; Goraya, P. S.; Chaubey, U. S. (1987), "Continuum energy dissipation of 48 Persei", Astrophysics and Space Science 139 (2): 257–262, doi:10.1007/BF00644354, Bibcode: 1987Ap&SS.139..257T .
  • Guo, Xiao-Zhen; Guo, Zi-He; Hao, Jin-Xin (1991), "A study of the low dispersion spectrum and photometry of the Be star 48 Per in 1989", Acta Astronomica Sinica 32 (4): 415–420, Bibcode: 1991AcASn..32..415G .
  • Hao, Jinxin; Lin, Huang; Catala, C.; Foing, B. H. (1995), "Nonradial pulsations in 48 Persei: results from MUSICOS 1989 campaign", Multi-site Continuous Spectroscopy. Proceedings of the 4th Workshop Held in Beijing, China, June 19–24, 1994: 91, Bibcode: 1995mscs.conf...91H .
  • Hubert, A. M. et al. (1997), "Multi-site continuous spectroscopy. V. Rapid photospheric variability in the Be star 48 Persei from the MUSICOS 1989 campaign", Astronomy & Astrophysics 324: 929–940, Bibcode: 1997A&A...324..929H .
  • Delaa, O. et al. (2011), "Kinematics and geometrical study of the Be stars 48 Persei and ψ Persei with the VEGA/CHARA interferometer", Astronomy & Astrophysics 529: A87, doi:10.1051/0004-6361/201015639, Bibcode: 2011A&A...529A..87D .



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