Outer Convection Zones and Internal Temperatures of Cool White Dwarfs

Details Outer Convection Zones and Internal Temperatures of Cool White Dwarfs Outer Convection Zones and Internal Temperatures of Cool White Dwarfs

Nov 1968

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1968ap%26ss...2..375b&link_type=abstract

Astrophysics and Space Science, Volume 2, Issue 3, pp.375-383

Astronomy and Astrophysics

Astrophysics

31

Scientific paper

The outer convection zone of the low-temperature white dwarf Van Maanen 2 has been studied for two different atmospheric models given by Weidemann (1960). A slight modification of the standard mixing length theory and the abundances derived by Weidemann have been used. The thickness of the convection zone is about 8 km for the atmospheric model withT eff=5780 K,g=108 cm sec-2 and about 23 km forT eff=5040,g=3.16×107K. In both cases the temperature at the lower boundary of the convection zone is about 9.8×105K. It is shown that this temperature corresponds approximately to the transition temperatureT tr to the (almost) isothermal core of the white dwarf. This value is considerably lower than the values ofT tr discussed in the literature until now. The outer convection zone consists of an upper completely non-degenerate part and a lower part with moderate degeneracy. In this lower part the degree of degeneracy is practically independent of depth.

Affiliated with

Also associated with

No associations

Rating

Outer Convection Zones and Internal Temperatures of Cool White Dwarfs 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 Outer Convection Zones and Internal Temperatures of Cool White Dwarfs, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Outer Convection Zones and Internal Temperatures of Cool White Dwarfs will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1261000