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Post Info TOPIC: Nova Orion AD 483
Blobrana


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Nova Orion AD 483
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Nova N40 in Nickiforov's (2010) list - the nova of 14 December AD 483, which was described as "Emperor Xisosen of Wei, 7th year of the Taihe reign, period 10th month. There was a guest star east of Shen as large as a peck measure and like a fuzzy star". 
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Title: Discovery of an eclipsing dwarf nova in the ancient nova shell Te 11
Author: Brent Miszalski, Patrick A. Woudt, Stuart P. Littlefair, Brian Warner, Henri M. J. Boffin, Romano L. M. Corradi, David Jones, Mokhine Motsoaledi, Pablo Rodríguez-Gil, Laurence Sabin, Miguel Santander-García

We report on the discovery of an eclipsing dwarf nova (DN) inside the peculiar, bilobed nebula Te 11. Modelling of high-speed photometry of the eclipse finds the accreting white dwarf to have a mass 1.18 M and temperature 13 kK. The donor spectral type of M2.5 results in a distance of 330 pc, colocated with Barnard's loop at the edge of the Orion-Eridanus superbubble. The perplexing morphology and observed bow shock of the slowly-expanding nebula may be explained by strong interactions with the dense interstellar medium in this region. We match the DN to the historic nova of 483 CE in Orion and postulate that the nebula is the remnant of this eruption. This connection supports the millennia time scale of the post-nova transition from high to low mass-transfer rates. Te 11 constitutes an important benchmark system for CV and nova studies as the only eclipsing binary out of just three DNe with nova shells.

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