Spectroscopy of six highly evolved Abell planetary nebulae

Details Spectroscopy of six highly evolved Abell planetary nebulae Spectroscopy of six highly evolved Abell planetary nebulae

Feb 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005mnras.357..548p&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 357, Issue 2, pp. 548-558.

Astronomy and Astrophysics

Astronomy

5

Planetary Nebulae: Individual: A8, Planetary Nebulae: Individual: A13, Planetary Nebulae: Individual: A62, Planetary Nebulae: Individual: A72, Planetary Nebulae: Individual: A78, Planetary Nebulae: Individual: A83

Scientific paper

We have undertaken visual spectroscopy of the highly evolved planetary nebulae (PNe) A8, A13, A62, A72, A78 and A83 over a wavelength range 4330 < λ < 6830Å. This permits us to specify relative line intensities in various sectors of the nebular shells, and to investigate the variation of emission as a function of radius. We determine that the spectrum of the central star of A78 has varied appreciably over a period of 25 yr. There is now evidence for strong P Cygni absorption in the λ4589 and λ5412 transitions of HeII, implying terminal velocities of the order of V∞≅ 3.83 × 103 km s-1. We also note that the emission-line profiles of the sources can be used to investigate their intrinsic emission structures. We find that most PNe show appreciable levels of emission throughout their volumes; only one source (A13) possesses a thin-shell structure. Such results are in conformity with evolutionary theory, and probably reflect the consequences of adiabatic cooling in highly evolved outflows.

Affiliated with

Also associated with

No associations

Rating

Spectroscopy of six highly evolved Abell 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 Spectroscopy of six highly evolved Abell planetary nebulae, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spectroscopy of six highly evolved Abell planetary nebulae will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-819321