The parameters of planetary nebulae and their central stars derived from observations

Astronomy and Astrophysics – Astrophysics

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

8

Far Ultraviolet Radiation, Planetary Nebulae, Stellar Evolution, Stellar Mass, Stellar Temperature, Chromosphere, Diameters, Mass Distribution, Red Giant Stars, Stellar Magnitude, White Dwarf Stars

Scientific paper

On the basis of data on planetary nebula (PN) central star temperatures obtained by measurements in the ultraviolet (UV) range, the empirical calibration dependence between the number of Lyman photons emitted by a central star S' and PN diameter D, is constructed. The temperatures of 118 PN central stars are estimated with this dependence. It is shown that the central star masses are distributed in a wide interval from ≈0.5 to ≈1.2 M_sun;. The averaged empirical tracks of evolution of low-mass (<0.6 M_sun;) and massive (>0.6 M_sun;) central stars differing considerably from each other are constructed. The PN originates as a result of ionization of the matter ejected by a red giant at the superwind stage. The cause for this ionization is the UV radiation of the PN central star.

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

The parameters of planetary nebulae and their central stars derived from observations 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 The parameters of planetary nebulae and their central stars derived from observations, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The parameters of planetary nebulae and their central stars derived from observations will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-1230706

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