Hydrogen-poor planetary nebulae

Astronomy and Astrophysics – Astrophysics

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

12 pages, 3 figures. Invited review: Sakurai's object: What have we learned in the first five years?(Keele, UK). To be publish

Scientific paper

Five planetary nebulae are known to show hydrogen-poor material near the central star. In the case of A58, this gas was ejected following a late thermal pulse similar to Sakurai's Object. In this paper I will review these five objects. One of them, IRAS 18333$-$2357, may not be a true PN. I will show that there is a strong case for a relation to the [WC] stars and their relatives, the weak emission-line stars. The surface abundances of the [WC] stars are explained via diffuse overshoot into the helium layer. The hydrogen-poor PNe do not support this: their abundances indicate a change of abundance with depth in the helium layer. A short-lived phase of very high mass loss, the r-AGB, is indicated. Sakurai's Object may be at the start of such a phase, and may evolve to very low stellar temperatures.

No associations

LandOfFree

Say what you really think

Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.

Rating

Hydrogen-poor planetary nebulae does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Hydrogen-poor planetary nebulae, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hydrogen-poor planetary nebulae will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-538124

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.