Home • Search • Translate
From Wikipedia, the free encyclopedia
IU Aurigae

A visual band light curve for IU Aurigae, adapted from Özdemir et al. (2003) [1]
Observation data
Epoch J2000       Equinox J2000
Constellation Auriga
Right ascension 05h 27m 52.40539s [2]
Declination +34° 46′ 58.3435″ [2]
Apparent magnitude (V) 8.19 to 8.83 [3]
Characteristics
Spectral type B0p + B1Vp [3] + ?
U−B color index -0.66
B−V color index 0.18
Variable type Eclipsing binary [4]
Astrometry
Radial velocity (Rv)9 ± 5 km/s
Proper motion (μ) RA: −4.479 [2]  mas/ yr
Dec.: -9.049 [2]  mas/ yr
Parallax (π)0.4786 ± 0.5765  mas [2]
Other designations
IU Aur, BD+34°1051, HD 35652, HIP 25565, SAO 58059, PPM 70395 [5]
Database references
SIMBAD data

IU Aurigae is a triple star [6] system in the constellation Auriga, consisting of an eclipsing binary pair orbiting a third component with a period of 335 years. [7] This system is too faint to be viewed with the naked eye, having a peak apparent visual magnitude of 8.19. [3] The eclipsing pair form a Beta Lyrae-type semidetached binary of two Bp stars [3] with a period of 1.81147435 days. [4] During the primary eclipse, the visual magnitude of the system drops to 8.89, while for the secondary it decreases to 8.74. [3] [8] The third component is a massive object with 17–18 M☉, and may actually be a binary – which would make this a quadruple star system. [7]

References

  1. ^ Özdemir, S.; Mayer, P.; Drechsel, H.; Demircan, O.; Ak, H. (May 2003). "Refinement of third body parameters and new photometric results for the early-type multiple system IU Aurigae". Astronomy & Astrophysics. 403 (2): 675–681. Bibcode: 2003A&A...403..675O. doi: 10.1051/0004-6361:20030392.
  2. ^ a b c d e 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.
  3. ^ a b c d e Avvakumova, E. A.; et al. (October 2013), "Eclipsing variables: Catalogue and classification", Astronomische Nachrichten, 334 (8): 860, Bibcode: 2013AN....334..860A, doi: 10.1002/asna.201311942, hdl: 10995/27061
  4. ^ a b Samus, N. N.; et al. (2017), "General Catalogue of Variable Stars", Astronomy Reports, 5.1, 61 (1): 80–88, Bibcode: 2017ARep...61...80S, doi: 10.1134/S1063772917010085, S2CID  125853869.
  5. ^ "IU Aur". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-08-18.
  6. ^ Mayer, P.; Drechsel, H. (September 1987), "Up-to-date parameters of the eclipsing triple system IU AUR", Astronomy and Astrophysics, 183 (1): 61–65, Bibcode: 1987A&A...183...61M.
  7. ^ a b Drechsel, H.; Haas, S.; Lorenz, R.; Mayer, P. (April 1994), "New photometric and spectroscopic results for IU Aurigae -- an early-type eclipsing binary in a multiple system", Astronomy and Astrophysics, 284 (3): 853–864, Bibcode: 1994A&A...284..853D.
  8. ^ Watson, Christopher (January 4, 2010), "IU Aurigae", The International Variable Star Index, American Association of Variable Star Observers, retrieved 2019-08-18.
Retrieved from " https://en.wikipedia.org/?title=IU_Aurigae&oldid=1141215449"

Top Of Page

Home • Search • Translate

© CSE