SIMBAD references

2000MNRAS.315..595T - Mon. Not. R. Astron. Soc., 315, 595-599 (2000/July-1)

The continuing saga of Sakurai's object (V4334 Sgr): dust production and helium line emission.

TYNE V.H., EYRES S.P.S., GEBALLE T.R., EVANS A., SMALLEY B., DUERBECK H.W. and ASPLUND M.

Abstract (from CDS):

We report further UKIRT spectroscopic observations of Sakurai's object (V4334 Sgr) made in 1999 April/May in the 1-4.75µm range, and find that the emission is dominated by amorphous carbon at Td∼600K. The estimated maximum grain size is 0.6µm, and the mass lower limit is 1.7±0.2x10–8M☉ to 8.9±0.6x10–7M☉ for distances of 1.1-8kpc. For 3.8kpc the mass is 2.0±0.1x10–7M☉.

We also report strong Hei emission at 1.083µm, in contrast to the strong absorption in this line in 1998. We conclude that the excitation is collisional, and is probably caused by a wind, consistent with the P Cygni profile observed by Eyres et al. in 1998.


Abstract Copyright: 2000, Royal Astronomical Society

Journal keyword(s): stars: AGB and post-AGB - circumstellar matter - stars: individual: Sakurai's object - stars: individual: V4334 Sgr - infrared: stars

Simbad objects: 2

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