Almaaz, Al Anz, ε Aur, 7 Aur, BD+43°1166, FK5 183, HD 31964, HIP 23416, HR 1605, SAO 39955[14]
Data sources:
Hipparcos Catalogue, Bright Star Catalogue (5th rev. ed.), 9th Catalog of Spectroscopic Binary Orbits, Variable Star Index (VSX)
Database references
SIMBAD
data
Epsilon Aurigae (ε Aurigae, abbreviated Epsilon Aur, ε Aur) is a multiple star system in the northern constellation of Auriga, the charioteer. It is an unusual eclipsing binary system comprising an F0 supergiant (officially named Almaaz/ælˈmɑːz/, the traditional name for the system) and a companion which is generally accepted to be a huge dark disk orbiting an unknown object, possibly a binary system of two small B-type stars. The distance to the system is still a subject of debate, but data from the Gaia spacecraft puts its distance at around 1,350±300 light years from Earth.
Epsilon Aurigae was first suspected to be a variable star when German astronomer Johann Heinrich Fritsch observed it in 1821. Later observations by Eduard Heis and Friedrich Wilhelm Argelander reinforced Fritsch's initial suspicions and attracted attention to the star. Hans Ludendorff, however, was the first to study it in great detail. His work revealed that the system was an eclipsing binary variable, a star that dims when its partner obscures its light.
About every 27 years, Epsilon Aurigae's brightness drops from an apparent visual magnitude of +2.92 to +3.83. This dimming lasts 640–730 days. In addition to this eclipse, the system also has a low amplitude pulsation with a non-consistent period of around 66 days.
Epsilon Aurigae's eclipsing companion has been subject to much debate since the object does not emit as much light as is expected for an object its size. As of 2008, the most popularly accepted model for this companion object is a binary star system surrounded by a massive, opaque disk of dust; theories speculating that the object is a large, semitransparent star or a black hole have since been discarded.
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^Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. (Erratum: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
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EpsilonAurigae (ε Aurigae, abbreviated Epsilon Aur, ε Aur) is a multiple star system in the northern constellation of Auriga, the charioteer. It is an...
Kloppenborg; et al. (2010). "Infrared images of the transiting disk in the EpsilonAurigae system". Nature. 464 (7290): 370–2. arXiv:1004.2464. Bibcode:2010Natur...
constellation of Auriga. It has the Bayer designation α Aurigae, which is Latinised to Alpha Aurigae and abbreviated Alpha Aur or α Aur. Capella is the sixth-brightest...
Binary star system 2.98 2.95 Epsilon Leonis Star 2.98 Epsilon Corvi Star 2.98 Epsilon Geminorum Star 2.99 2.92 EpsilonAurigae Triple star system 2.99 Zeta...
effects. Their first encounter with Taurans, on a planet orbiting EpsilonAurigae, triggers their post-hypnotic training, which causes them to massacre...
asterism consisting of Eta Aurigae, EpsilonAurigae, Zeta Aurigae, Upsilon Aurigae, Nu Aurigae, Tau Aurigae, Chi Aurigae and 26 Aurigae. Consequently, the Chinese...
companion is enshrouded in large optically thick disks reminiscent of EpsilonAurigae, VVV-WIT-07, and AS Leonis Minoris. The proposed secondary star and...
mass that is 98% of the Sun. An example of an eclipsing binary is EpsilonAurigae in the constellation Auriga. The visible component belongs to the spectral...
including Antares A (Alpha Scorpii A). Examples of eclipsing binaries are EpsilonAurigae (Almaaz), VV Cephei, and V766 Centauri (HR 5171). Angular diameter...
In 1933, she joined the Nazi Party. In 1936, she published work on EpsilonAurigae. In 1938, she became a fulltime observer. Under the Weimar Republic...
passing between the star and observers on Earth. Two other stars, EpsilonAurigae and TYC 2505-672-1, are reported to be eclipsed regularly and it has...
asterism consisting of Zeta Aurigae, EpsilonAurigae, Eta Aurigae, Upsilon Aurigae, Nu Aurigae, Tau Aurigae, Chi Aurigae and 26 Aurigae. Consequently, the Chinese...
days (~2:48 hours, HW Virginis); the longest is 9892 days (27 years, EpsilonAurigae). Over long periods of time, various effects can cause the period to...
Alioth /ˈæliɒθ/, also called Epsilon Ursae Majoris, is a star in the northern constellation of Ursa Major. The designation is Latinised from ε Ursae Majoris...
four billion miles (6.5 billion kilometers) in diameter surrounding EpsilonAurigae, located more than 2,000 light years distant. Kopal would later conclude...
Lambda Aurigae, Latinized from λ Aurigae, is the Bayer designation for a solar analog star in the northern constellation of Auriga. It is visible to the...
stars in star clusters such as Omega Centauri, Alpha Centauri, M5, and EpsilonAurigae. In 1903, she and Williamina Fleming investigated the possibility of...
Sumin; Grindlay, J. E.; Bildsten, L. (July 2013). "A Mysterious Twin of Epsilon-Aurigae". Bulletin of the American Astronomical Society. 45: 20302. Bibcode:2013giec...
Gliese 268 (QY Aurigae) is a RS Canum Venaticorum variable (RS CVn) star in the Auriga constellation. RS CVn variables are binary star systems with a...
that they become egg-shaped and material flows from one to the other. Epsilon Lyrae, known informally as the Double Double, is a complex multiple star...
traditional star names, there were some coined in modern times, e.g. "Avior" for Epsilon Carinae (1930), and a number of stars named after people (mostly in the...
Betelgeuse VV Cephei A Mu Cephei (possibly a hypergiant) 119 Tauri Epsilon Pegasi Psi1 Aurigae Zeta Cephei 31 and 32 Cygni Lambda Velorum Mira was historically...
presentation of high-resolution images of isolated stellar objects (including AB Aurigae and HD 163296) from the Hubble Space Telescope, among the first of those...
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