SIMBAD references

2001ApJ...562L..83A - Astrophys. J., 562, L83-L86 (2001/November-3)

3 ms in the life of β Ceti: sustained flare activity on a clump giant detected by the Extreme Ultraviolet Explorer.

AYRES T.R., OSTEN R.A. and BROWN A.

Abstract (from CDS):

A 34 day Extreme Ultraviolet Explorer (EUVE) pointing on the ``clump'' giant β Ceti (HD 4128; K0 III) recorded a series of striking coronal flare events, reminiscent of a singular outburst seen previously from µ Velorum (HD 93497; G6 III + dF). The recent flaring episode contrasts with a more placid behavior in a 6 day EUVE observation of β Cet 6 years earlier. The average 70-180 Å Deep Survey count rate in the new observation is twice as high, and the 75-150 Å spectrum displays a distinct hardening. The discovery of sustained flare activity on β Cet raises the possibility that such episodes are more common than suspected among the core helium-burning giants and sharpens the puzzle of the survival of magnetic activity beyond helium flash.

Abstract Copyright:

Journal keyword(s): Stars: Activity - Stars: Coronae - Stars: Flare - Stars: Individual: Henry Draper Number: HD 4128 - Stars: Individual: Henry Draper Number: HD 93497 - Stars: Late-Type - Ultraviolet: Stars

Simbad objects: 5

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2019.12.07-15:32:16

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