2004A&A...418..235G

Query : 2004A&A...418..235G

2004A&A...418..235G - Astronomy and Astrophysics, volume 418, 235-242 (2004/4-4)

Discovery of X-ray flaring on the magnetic Bp-star σ Ori E.

GROOTE D. and SCHMITT J.H.M.M.

Abstract (from CDS):

We report the detection of an X-ray flare on the Bp star σ Ori E with the ROSAT high resolution imager (HRI). The flare is shown to have likely occurred on the early-type star, rather than on an hypothesized late-type companion. We derive flare parameters such as total energy release, coarse estimates of size and density, and also present arguments for a magnetic origin of the flare. We place our observations in the context of a magnetic character of Bp-type stars and speculate on a common physical basis and connection between Bp and Be stars.

Abstract Copyright: ∼

Journal keyword(s): stars: chemically peculiar - stars: early-type - stars: flare - stars: individual: HD 37479 = σ Ori E - stars: magnetic fields - stars: winds, outflows

Simbad objects: 5

Full paper

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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 - 2023	#notes
1	* lam Eri	Be*	05 09 08.7831482	-08 45 14.690823	3.17	4.07	4.27	4.35	4.55	B2III(e)p	300	1
2	V* IQ Aur	a2*	05 19 00.0284573784	+33 44 54.220806888		5.201	5.371			A0p	287	0
3	* tet01 Ori C	SB*	05 35 16.4662967280	-05 23 22.921811880	4.20	5.15	5.13	4.91	4.73	O7Vp	1376	1
4	* sig Ori	Y*O	05 38 44.7653828520	-02 36 00.283179888	2.54	3.58	3.79	3.87	4.11	O9.5V+B0.2V(n)	785	0
5	* sig Ori E	Y*O	05 38 47.2050040320	-02 35 40.521424812	5.66	6.38	6.46	6.84	7.08	B2IV-Vp_He	447	0

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