2001ApJ...562L..83A


C.D.S. - SIMBAD4 rel 1.7 - 2019.10.22CEST05:15:35

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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Number of rows : 5

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2019
#notes
1 * bet Cet PM* 00 43 35.37090 -17 59 11.7827 3.90 3.02 2.01 1.29 0.78 G9.5IIICH-1 495 0
2 * gam Tau ** 04 19 47.6038491 +15 37 39.515422 5.46 4.64 3.65 4.83   G9.5IIIabCN0.5 505 0
3 * tet01 Tau SB* 04 28 34.4960341 +15 57 43.849432 5.510 4.780 3.840 5.48   G9IIIFe-0.5 461 0
4 * mu. Vel ** 10 46 46.17877 -49 25 12.9244 4.16 3.59 2.69 2.01 1.52 G6III 171 0
5 V* FK Com Ro* 13 30 46.7993742986 +24 13 57.786184235   9.04 8.245   7.204 G4III 345 1

    Equat.    Gal    SGal    Ecl

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2019.10.22-05:15:35

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