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v838 monocerotis

Such an event is known to have occurred in Sakurai’s Object. This data is from By its temperature had increased a bit since to 3, K and its luminosity was 15, times solar, but its radius had decreased to times that of the Sun although the ejecta continues to expand. V Monocerotis is located in the approximate direction of the galactic anticenter and off from the disk of the Milky Way. The light that travels directly from the object arrives first. The New York Times. Therefore, the star became extremely cool and deep red.

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The spectrum of V Monocerotis reveals a companion, a hot blue B-type main sequence star probably not very different from the progenitor star.

The light curve produced by the eruption is unlike anything previously seen. Based on the photometric parallax of the companion, Munari et al. By March the size of the light echo in the sky was monocerotjs the angular diameter of Jupiter and was continuing to grow. The star probably has a mass of from 5 to 10 times solar. A similar eruption occurred in in the Milky Way V Sagittarii.


In addition, the merger model explains monoceotis multiple peaks in the light curve observed during the outburst.

Spectacular view of V838 Monocerotis light echo

The reason mooncerotis the outburst is still uncertain, but several conjectures have been put forward, including an eruption related to stellar death processes and a merger of a binary star or planets. The star’s envelope would then warm up enough to trigger deuterium fusion, which would lead to rapid expansion.

The initial light curve resembled that of a novaan eruption that occurs when enough hydrogen gas has accumulated on the surface of a white dwarf from its close binary companion. The New York Times. Monthly Notices of the Royal Astronomical Society.

The rings appear to travel faster than the speed monoceroyis lightbut in fact they do not. If that is the case, V Monocerotis would be the monocerofis known L-type supergiant. Wikimedia Commons has media related to V Monocerotis. Combined with the apparent magnitude measured from pre-eruption photographs, it was thought to be an underluminous F-type dwarf, which posed a considerable enigma.

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Based on an incorrect interpretation of the light echo the eruption generated, the distance of the star was first estimated to be 1, to 2, light years. Therefore, it was also designated Nova Monocerotis The outburst of V Monocerotis may be a nova eruption after all, albeit a very unusual one. Archived from the original on Dec 22, Another possibility is that V Monocerotis may have swallowed its giant planets. The light that travels directly from the object arrives first.


This theory may also explain the apparent dust shells around the star. Some details are emerging on the nature of the star that experienced the outburst.

V Monocerotis revisited: Space phenomenon imitates art | ESA/Hubble

However, there are very young clusters like Ruprecht 44 and the 4-million-year-old NGC at a distance of about 7 and 6 kiloparsecsrespectively.

This data is from The American Astronomical Society. Yet another brightening in infrared occurred in early April. It is not yet clear if the surrounding nebulosity is associated with the star itself. Retrieved 3 October Binary stars Monoceros constellation Peculiar variables L-type supergiants M-type supergiants Luminous red novae Objects with variable star designations.

In other projects Wikimedia Commons. Very massive stars survive multiple such events; however, they experience heavy mass loss about half of the original mass is lost while in the main sequence before settling as extremely hot Wolf-Rayet stars. The Hubble Heritage Project.

Gliese Gliese In the star had returned to near its original brightness before the eruption magnitude