Not to be confused with Rho Arae.

R Arae is an Algol-type eclipsing binary in the constellation Ara. Located approximately 298 parsecs (970 ly) distant, it normally shines at magnitude 6.17, but during eclipses can fall as low as magnitude 7.32.[3] When an eclipse is not occurring, it will be faintly visible to the naked eye under ideal observing conditions.

In 1892, R Ara was discovered to be an eclipsing binary by Alexander William Roberts at Lovedale observatory in South Africa. The discovery was published in 1894.[7] Roberts referred to the star as "(5949) Arae", its designation as an unconfirmed variable star in Seth Carlo Chandler's catalog of variable stars.[8] It was listed with its modern variable star designation, R Arae, in Annie Jump Cannon's 1907 Second Catalogue of Variable Stars.[9]

It has been suggested by multiple studies that mass transfer is occurring between the two stars of this system,[10][11] and the period of eclipses seems to be increasing over time.[11] The primary is a blue-white main sequence star of spectral type B5V that is 5 times as massive as the Sun, while the secondary is a yellow-white star of spectral type F1IV that is 1.5 times as massive as the Sun. Stellar material is being stripped off the secondary and accreting on the primary.[5]

R Arae has an 8th-magnitude companion 3″ away.[5] The companion star is at a similar distance.[12]

References

  1. ^ Blane, D.; Blackford, M. G.; Budding, E.; Reed, P. A. (May 2019). "New light on R Arae" (PDF). Information Bulletin on Variable Stars. 6267 (1). Bibcode:2019IBVS.6267....1B. doi:10.22444/IBVS.6267. S2CID 202939949. Retrieved 24 October 2021.
  2. ^ a b Van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. S2CID 18759600.
  3. ^ a b VSX (25 October 2010). "R Arae". AAVSO Website. American Association of Variable Star Observers. Retrieved 30 June 2014.
  4. ^ a b Samus, N. N.; Durlevich, O. V.; 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: B/gcvs. Bibcode:2009yCat....102025S.
  5. ^ a b c d e f g h i Bakıș, H.; Bakıș, V.; Eker, Z.; Demircan, O. (2016). "Active binary R Arae revisited: Bringing the secondary component to light and physical modelling of the circumstellar material". Monthly Notices of the Royal Astronomical Society. 458 (1): 508–516. Bibcode:2016MNRAS.458..508B. doi:10.1093/mnras/stw320.
  6. ^ a b c Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
  7. ^ Roberts, Alexander W. (October 1894). "Variation of (3416)-Velorum and (5949)-Arae". Astronomical Journal. 14 (327): 113–117. Bibcode:1894AJ.....14..113R. doi:10.1086/102103. Retrieved 24 November 2024.
  8. ^ Chandler, S. C. (August 1893). "Second catalogue of variable stars". Astronomical Journal. 13 (300): 89–110. Bibcode:1893AJ.....13...89C. doi:10.1086/101922. Retrieved 24 November 2024.
  9. ^ Cannon, Annie J. (1907). "Second catalogue of variable stars". Annals of Harvard College Observatory. 55: 1–94. Bibcode:1907AnHar..55....1C. Retrieved 21 November 2024.
  10. ^ Nield, K. M. (1991). "Observations and analysis of the Southern binary R Arae". Astrophysics and Space Science. 180 (2): 233–252. Bibcode:1991Ap&SS.180..233N. doi:10.1007/BF00648180. S2CID 122896654.
  11. ^ a b Reed, P. A.; McCluskey Jr., G. E.; Kondo, Y.; Sahade, J.; Guinan, E. F.; GiméNez, A.; Caton, D. B.; Reichart, D. E.; Ivarsen, K. M.; Nysewander, M. C. (2010). "Ultraviolet study of the active interacting binary star R Arae using archivalIUEdata". Monthly Notices of the Royal Astronomical Society. 401 (2): 913. arXiv:0909.4047. Bibcode:2010MNRAS.401..913R. doi:10.1111/j.1365-2966.2009.15741.x. S2CID 15237238.
  12. ^ Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
Allikas: https://en.wikipedia.org/wiki/R_Arae
No tags for this post.