2004A&A...424L..39D

Query : 2004A&A...424L..39D

2004A&A...424L..39D - Astronomy and Astrophysics, volume 424, L39-42 (2004/9-4)

A Spectroscopic study of the non-thermal radio emitter CygOB2#8A: Discovery of a new binary system.

DE BECKER M., RAUW G. and MANFROID J.

Abstract (from CDS):

We present the results of a spectroscopic campaign revealing that the non-thermal radio emitter CygOB2#8A is an O6+O5.5 binary system. We propose the very first orbital solution indicating a period of about 21.9 days. The system appears to be eccentric (0.24±0.04) and is likely seen under a rather low inclination angle. The mass ratio of the components is close to unity. The impact of the binarity of this star in the framework of our understanding of non-thermal radio emission from early-type stars is briefly discussed.

Abstract Copyright: ∼

Journal keyword(s): binaries: spectroscopic - stars: early-type - stars: fundamental parameters - stars: individual: CygOB2#8A

Simbad objects: 4

Full paper

View the references in ADS

Number of rows : 4

N	Identifier	Otype	ICRS (J2000) RA	ICRS (J2000) DEC	Mag U	Mag B	Mag V	Mag R	Mag I	Sp type	#ref 1850 - 2023
1	BD+60 497	Y*O	02 31 57.0901516200	+61 36 43.948697940	10.466	9.39	8.85			O6.5V((f))+O8/B0V	103
2	[MT91] 213	Be*	20 32 13.1247390384	+41 27 24.346666440	13.12	13.08	11.266			B0Vp	267
3	Ass Cyg OB 2	As*	20 33.2	+41 19						~	894
4	BD+40 4227A	SB*	20 33 15.0781182864	+41 18 50.479292556	10.42	10.27	8.98	8.03	6.83	O6Ib(fc)+O4.5:III:(fc)	241

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