V838 Monocerotis (Nova Monocerotis 2002) is a spectroscopic binary star system in the constellation Monoceros about 19,000 light years (6 kpc) from the Sun. The previously unremarked star was observed in early 2002 experiencing a major outburst, and was one of the largest known stars for a short period following the outburst.[10] Originally believed to be a typical nova eruption, it was then identified as the first of a new class of eruptive variables known as luminous red novae. The reason for the outburst is still uncertain, but is thought to have been a merger of two stars within a triple system.
The eruption occurred on one of two B3 main sequence stars in a close binary orbit. The erupting star appeared as an unusually cool supergiant and for a while engulfed its companion. By 2009 the temperature of the supergiant had increased (since 2005) to 3,270 K and its luminosity was 15,000 times solar (L☉), but its radius had decreased to 380 times that of the Sun (R☉), although the ejecta continues to expand.[11]
^ abCite error: The named reference mobeen2021 was invoked but never defined (see the help page).
^Cite error: The named reference Bond2003 was invoked but never defined (see the help page).
^ abcGoranskij, V. P.; Barsukova, E. A.; Burenkov, A. N.; Valeev, A. F.; Zharova, A. V.; Kroll, P.; Metlova, N. V.; Shugarov, S. Yu. (2020). "Progenitor and Remnant of the Luminous Red Nova V838 Monocerotis". Astrophysical Bulletin. 75 (3): 325–349. Bibcode:2020AstBu..75..325G. doi:10.1134/S1990341320030049. S2CID 221839336.
^ abBrown, 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.
^Cite error: The named reference reid2019 was invoked but never defined (see the help page).
^Ortiz-León, Gisela N.; Menten, Karl M.; Kamiński, Tomasz; Brunthaler, Andreas; Reid, Mark J.; Tylenda, Romuald (2020). "SiO maser astrometry of the red transient V838 Monocerotis". Astronomy & Astrophysics. 638: A17. arXiv:2004.01488. Bibcode:2020A&A...638A..17O. doi:10.1051/0004-6361/202037712. S2CID 214794885.
^Cite error: The named reference Tylenda2005b was invoked but never defined (see the help page).
^ abcKamiński, Tomek; Tylenda, Romuald; Kiljan, Aleksandra; Schmidt, Mirek; Lisiecki, Krzysztof; Melis, Carl; Frankowski, Adam; Joshi, Vishal; Menten, Karl M. (2021). "V838 Monocerotis as seen by ALMA: A remnant of a binary merger in a triple system". Astronomy & Astrophysics. 655: A32. arXiv:2106.07427. Bibcode:2021A&A...655A..32K. doi:10.1051/0004-6361/202141526. S2CID 235422695.
^Cite error: The named reference Munari2005 was invoked but never defined (see the help page).
^Cite error: The named reference Tylenda2005 was invoked but never defined (see the help page).
^Tylenda, R.; Kamiński, T.; Schmidt, M.; Kurtev, R.; Tomov, T. (2011). "High-resolution optical spectroscopy of V838 Monocerotis in 2009". Astronomy & Astrophysics. 532: A138. arXiv:1103.1763. Bibcode:2011A&A...532A.138T. doi:10.1051/0004-6361/201116858. S2CID 118649108.
V838Monocerotis (Nova Monocerotis 2002) is a spectroscopic binary star system in the constellation Monoceros about 19,000 light years (6 kpc) from the...
right). This ellipsoid naturally expands over time. The variable star V838Monocerotis experienced a significant outburst in 2002 as observed by the Hubble...
is slight (4.2–4.6). It has a companion star of visual magnitude 8. V838Monocerotis, a variable red supergiant star, had an outburst starting on January...
Frankowski, Adam; Joshi, Vishal; Menten, Karl M. (1 November 2021). "V838Monocerotis as seen by ALMA: A remnant of a binary merger in a triple system"....
Sagittarii, a star in the Milky Way galaxy, flared similarly, and in 2002, V838Monocerotis followed suit and was studied quite closely. The first confirmed luminous...
systems end their evolution in a stellar merger. Its similarities to V838Monocerotis and V4332 Sagittarii allowed scientists to identify these stars as...
supergiants to form through stellar collisions, an example of which is V838Monocerotis while in the height of its luminous red nova eruption. Class T dwarfs...
Hubble Space Telescope image of the expanding light echo around the star V838 Mon, which is more than 19,000 light-years away from Earth. Another conspiracy...
transient resulting from a stellar merger similar to red Galactic nova V838Monocerotis. Analysis of historical images of the area of the OT suggest with 70%...
a nova and a supernova. One of the prototypes for such an event is V838Monocerotis, that according to Soker's model, erupted as a merger of two main-sequence...
the whole envelope. V1309 Scorpii, a possible star merger. M31 RV V838Monocerotis Ou 5, a planetary nebula whose progenitor was a common envelope binary...
1928 and 1996 and reached about magnitude 13. RS Ophiuchi HR Lyrae V838Monocerotis Nogami, D.; et al. (2003). "The SU UMa Nature of the Dwarf Nova, DM...