SIMBAD references

2008A&A...488L..67M - Astronomy and Astrophysics, volume 488, L67-70 (2008/9-4)

δ Centauri: a new binary Be star detected by VLTI/AMBER spectro-interferometry.

MEILLAND A., MILLOUR F., STEE P., SPANG A., PETROV R., BONNEAU D., PERRAUT K. and MASSI F.

Abstract (from CDS):

We study the Be star δ Cen circumstellar disk using long-baseline interferometry which is the only observing technique capable of resolving spatially and spectroscopically objects smaller than 5 mas in the H and K band. We used the VLTI/AMBER instrument on January 6, 8, and 9, 2008, in the H and K bands to complete low (35) and medium (1500) spectral resolution observations. We detected an oscillation in the visibility curve plotted as a function of the spatial frequency which is a clear signature of a companion around δ Cen. Our best-fit soltution infers a binary separation of 68.7mas, a companion flux contribution in the K band of about 7% of the total flux, a PA of 117.5°, and an envelope flux around the Be primary that contributes up to about 50% of the total flux, in agreement with our Spectral Energy Distribution (SED) fit. The envelope size is estimated to be 1.6mas in K but no departure from spherical symmetry is detected.

Abstract Copyright:

Journal keyword(s): techniques: high angular resolution - techniques: interferometric - stars: emission-line, Be - stars: binaries: close - stars: winds, outflows - stars: circumstellar matter

Simbad objects: 11

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2022.08.13-13:40:50

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