Volume 391, Number 2, August IV 2002
|Page(s)||689 - 692|
|Published online||02 August 2002|
The early interaction of the planetary nebula NGC 40 with the interstellar medium
University of Virginia, Department of Astronomy, PO Box 3818, Charlottesville, VA 22903-0818, USA e-mail: firstname.lastname@example.org; email@example.com
2 Department of Physics, University of Haifa at Oranim, Tivon 36006, Israel
Corresponding author: N. Soker, firstname.lastname@example.org
Accepted: 6 June 2002
We report the detection of an Hα emission-line structure in the upstream side of the planetary nebula NGC 40, which is predicted by numerical simulations, and which is attributed to Rayleigh-Taylor instability. Such a Rayleigh-Taylor instability is expected to occur at early stages of the interaction process between the interstellar medium (ISM) and a fast moving planetary nebula, as is the case for NGC 40. We resolved the Rayleigh-Taylor instability “tongues”, as well as the flatness of the nebula around the “tongues”, which results from the deceleration by the ISM.
Key words: planetary nebulae: general / ISM: structure / planetary nebulae: individual: NGC 40 / instabilities
© ESO, 2002
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.