SIMBAD references

2001ApJ...555..405D - Astrophys. J., 555, 405-409 (2001/July-1)

Proper motions of dust shells surrounding NML Cygni.

DANCHI W.C., GREEN W.H., HALE D.D.S., McELROY K., MONNIER J.D., TUTHILL P.G. and TOWNES C.H.

Abstract (from CDS):

The distribution of dust emitted by the supergiant star NML Cygni has been resolved by interferometry at 11 µm wavelengths at various times over a period of 6 yr.
Result. show there are two discrete dust shells, which have both moved away from the star approximately the same amount during the 6 yr period. This allows determination of the time between ejection of material forming the two shells to be 65±14 yr. Assuming the radial outflow velocity can be derived from Doppler-measured velocities of masers surrounding the star, its distance can be calculated from the observed angular motion to be 1220±300 pc. This decreases the luminosity of the star by about 1 mag over that deduced from the distance 1900 pc previously assumed.

Abstract Copyright:

Journal keyword(s): Stars: Circumstellar Matter - Infrared: Stars - stars: individual (NML Cygni) - Techniques: Interferometric

Simbad objects: 3

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2020.02.25-08:35:14

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