Circumnebular neutral hydrogen in planetary nebulae

Details Circumnebular neutral hydrogen in planetary nebulae Circumnebular neutral hydrogen in planetary nebulae

Mar 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...351..515t&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 351, March 10, 1990, p. 515-521. Research supported by NSERC.

Astronomy and Astrophysics

Astronomy

46

H I Regions, Hydrogen Clouds, Planetary Nebulae, Centimeter Waves, Radio Sources (Astronomy)

Scientific paper

Centimeter line observations of six compact planetary nebulae are reported. Circumnebular atomic hydrogen absorption has been observed in NGC 6790, NGC 6886, IC 418, IC 5117, and BD +30 deg 3639, while H I was not observed to a high upper limit in NGC 6741. Hydrogen was also detected in emission from BD +30 deg 3639. The expansion velocities of the circumnebular envelopes are similar to the expansion velocities observed for the ionized nebula. The optical depth of circumnebular H I appears to decrease with increasing linear radius of the ionized nebulae, indicating that these nebulae are ionization bounded and that the amount of atomic hydrogen decreases as young nebulas evolve.

Affiliated with

Also associated with

No associations

Rating

Circumnebular neutral hydrogen in 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 Circumnebular neutral hydrogen in planetary nebulae, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Circumnebular neutral hydrogen in planetary nebulae will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1886091