Астрономическая датировка крабовидной туманности


Автор сообщения: gorm
Дата и время сообщения: 26 March 2008 at 13:49:17:

Рассмотрев скорость разлета самых отдаленных от центра волокон Крабовидной туманности, меньше всего подверженные ускорению от излучения центрального пульсара, авторы показали, что взрыв произошел в 1055+/-24 году, в точном соответствии с историческими данными.
Еще один гвоздь в стул Фоменко.

The Crab Nebula's Dynamical Age as Measured from its Northern Filamentary Jet
Authors: G. C. Rudie, R. A. Fesen, T. Yamada
(Submitted on 6 Jan 2008)

Abstract: We present a deep [O III] 4959,5007 image of the northern filamentary jet in the Crab Nebula taken with the 8.2m Subaru telescope. Using this image and an image taken with the KPNO 4m in 1988 (Fesen & Staker 1993), we have computed proper motions for 35 locations in the jet. The results suggest that when compared to the main body of the remnant, the jet experienced less outward acceleration from the central pulsar's rapidly expanding synchrotron nebula. The jet's apparent expansion rate yields an undecelerated explosion date for the Crab Nebula of 1055 plus or minus 24 C.E., a date much closer to the appearance of the historic 1054 C.E. guest star than the 1120 - 1140 C.E. dates estimated in previous studies using filaments located within the remnant's main nebula. Our proper motion measurements suggest the jet likely formed during the 1054 supernova explosion and represents the remnant's highest velocity knots possibly associated with a suspected N-S bipolar outflow from the supernova explosion.

Comments: 8 pages, 5 figures, Accepted to MNRAS


http://arxiv.org/abs/0801.0893



2748. Астрономическая датировка крабовидной туманности - gorm 13:49 26.03.08 (37)
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