R Muscae

R Muscae

Hubble Space Telescope image of R Muscae [1]
Observation data
Epoch J2000      Equinox ICRS
Constellation Musca
Right ascension 12h 42m 05.02561s[2]
Declination −69° 24′ 27.1966″[2]
Apparent magnitude (V) 5.93 - 6.73[3]
Characteristics
Spectral type F7 Ib[4] - G2[3]
B−V color index 0.750±0.020[5]
Variable type δ Cep[3]
Astrometry
Radial velocity (Rv)+3.8±2.9[6] km/s
Proper motion (μ) RA: −4.180[2] mas/yr
Dec.: −2.127[2] mas/yr
Parallax (π)1.0002±0.0291 mas[2]
Distance3,260 ± 90 ly
(1,000 ± 30 pc)
Absolute magnitude (MV)-3.62[7]
Details
Radius65[2] R☉
Luminosity2,541[2] L☉
Surface gravity (log g)2.0±0.1[8] cgs
Temperature5,985±54[7] K
Metallicity [Fe/H]+0.10±0.05[8] dex
Other designations
R Mus, AAVSO 1236-68, CD−68°1119, HD 110311, HIP 61981, HR 4820, SAO 251996[9]
Database references
SIMBADdata

R Muscae is a yellow-white hued variable star in the southern constellation of Musca. It has a nominal apparent visual magnitude of 6.31,[5] which is near the lower limit of visibility to the naked eye. The distance to this star, as determined from its annual parallax shift of 1.00 mas,[2] is around 3,260 light years.

This is an F-type supergiant star with a baseline stellar classification of F7 Ib.[4] It is a Classical Cepheid variable ranging from apparent magnitude 5.93 to 6.73[10] over 7.51 days,[7] while varying between spectral types F7 Ib and G2.[10] The star was suspected of having a detectable companion,[11] but this finding was later disputed.[12] Gaia and HST observations have shown that there is a companion, a 15th-magnitude star 7″ away.[13][14] There is an X-ray source with a luminosity of 6.3×1029 erg s−1 located at an angular separation of 1.9″ from R Muscae.[15]

A light curve for R Muscae, plotted from TESS data
A light curve for R Muscae, plotted from TESS data

References

  1. ^ "MAST: Barbara A. Mikulski Archive for Space Telescopes". Space Telescope Science Institute. Retrieved 8 December 2021.
  2. ^ a b c d e f g h 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.
  3. ^ a b c Samus', N. N; Kazarovets, E. V; Durlevich, O. V; Kireeva, N. N; Pastukhova, E. N (2017). "General catalogue of variable stars: Version GCVS 5.1". Astronomy Reports. 61 (1): 80. Bibcode:2017ARep...61...80S. doi:10.1134/S1063772917010085. S2CID 125853869.
  4. ^ a b Houk, Nancy; Cowley, A. P. (1979). Michigan catalogue of two-dimensional spectral types for the HD stars. Vol. 1. Ann Arbor, Michigan: Dept. of Astronomy, University of Michigan. Bibcode:1978mcts.book.....H.
  5. ^ a b Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331. arXiv:1108.4971. Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. S2CID 119257644.
  6. ^ de Bruijne, J. H. J.; Eilers, A.-C. (October 2012). "Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project". Astronomy & Astrophysics. 546: 14. arXiv:1208.3048. Bibcode:2012A&A...546A..61D. doi:10.1051/0004-6361/201219219. S2CID 59451347. A61.
  7. ^ a b c Luck, R. E.; et al. (August 2011). "The Distribution of the Elements in the Galactic Disk. II. Azimuthal and Radial Variation in Abundances from Cepheids". The Astronomical Journal. 142 (2): 12. arXiv:1106.0182. Bibcode:2011AJ....142...51L. doi:10.1088/0004-6256/142/2/51. S2CID 119288363. 51.
  8. ^ a b Soubiran, Caroline; et al. (2016). "The PASTEL catalogue: 2016 version". Astronomy & Astrophysics. 591: A118. arXiv:1605.07384. Bibcode:2016A&A...591A.118S. doi:10.1051/0004-6361/201628497. S2CID 119258214.
  9. ^ "DU Lyncis". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 3 September 2018.
  10. ^ a b BSJ (4 January 2010). "R Muscae". AAVSO Website. American Association of Variable Star Observers. Retrieved 21 December 2013.
  11. ^ Lloyd Evans, T. (June 1982). "Cepheid binaries. II. New southern examples". Monthly Notices of the Royal Astronomical Society. 199 (4): 925–941. Bibcode:1982MNRAS.199..925L. doi:10.1093/mnras/199.4.925.
  12. ^ Eichendorf, W.; et al. (May 1982). "UV, optical and IR observations of the Cepheid R MUSCAE". Astronomy and Astrophysics. 109 (2): 274–278. Bibcode:1982A&A...109..274E.
  13. ^ Kervella, Pierre; Gallenne, Alexandre; Remage Evans, Nancy; Szabados, Laszlo; Arenou, Frédéric; Mérand, Antoine; Proto, Yann; Karczmarek, Paulina; Nardetto, Nicolas; Gieren, Wolfgang; Pietrzynski, Grzegorz (2019). "Multiplicity of Galactic Cepheids and RR Lyrae stars from Gaia DR2. I. Binarity from proper motion anomaly". Astronomy and Astrophysics. 623: A116. arXiv:1903.03632. Bibcode:2019A&A...623A.116K. doi:10.1051/0004-6361/201834210. S2CID 119226246.
  14. ^ Evans, Nancy Remage; Pillitteri, Ignazio; Wolk, Scott; Karovska, Margarita; Tingle, Evan; Guinan, Edward; Engle, Scott; Bond, Howard E.; Schaefer, Gail H.; Mason, Brian D. (2016). "Resolved Companions of Cepheids: Testing the Candidates with X-Ray Observations". The Astronomical Journal. 151 (4): 108. arXiv:1602.01797. Bibcode:2016AJ....151..108E. doi:10.3847/0004-6256/151/4/108. S2CID 118500551.
  15. ^ Evans, Nancy Remage; et al. (April 2016). "Resolved Companions of Cepheids: Testing the Candidates with X-Ray Observations". The Astronomical Journal. 151 (4): 9. arXiv:1602.01797. Bibcode:2016AJ....151..108E. doi:10.3847/0004-6256/151/4/108. S2CID 118500551. 108.

Content Disclaimer

Informasi ini disarikan dari Wikipedia dan disajikan kembali untuk tujuan edukasi. Konten tersedia di bawah lisensi CC BY-SA 3.0. Kami tidak bertanggung jawab atas ketidakakuratan data yang bersumber dari kontribusi publik tersebut.

  1. The information displayed on this website is sourced in part or in whole from Wikipedia and has been adapted for the purpose of restating it. We strive to provide accurate and relevant information, however:
  2. There is no guarantee of absolute accuracy. Wikipedia is an open, collaborative project that can be edited by anyone, so information is subject to change.
  3. It is not intended to constitute professional advice. The content displayed is for informational and educational purposes only. For important decisions (e.g., medical, legal, or financial), please consult a professional.
  4. Content copyright. Wikipedia is licensed under the Creative Commons Attribution-ShareAlike License (CC BY-SA). This means that content may be reused with appropriate attribution and shared under a similar license.
  5. Responsible use. Any risk arising from the use of information from this website is entirely the responsibility of the user.