Imaging spectrophotometry of the planetary nebula NGC 6720 (the Ring Nebula)

Details Imaging spectrophotometry of the planetary nebula NGC 6720 (the Ring Nebula) Imaging spectrophotometry of the planetary nebula NGC 6720 (the Ring Nebula)

Nov 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994aj....108.1860l&link_type=abstract

The Astronomical Journal (ISSN 0004-6256), vol. 108, no. 5, p. 1860-1871

Astronomy and Astrophysics

Astronomy

19

Balmer Series, Electron Energy, Electron Flux Density, Emission Spectra, H Alpha Line, H Beta Line, Ionization, Planetary Nebulae, Stellar Spectra, Stellar Spectrophotometry, Visible Spectrum, Astronomical Maps, Astronomical Photography, Calibrating, Data Reduction, Fabry-Perot Spectrometers, Imaging Spectrometers, Photometers, Spectrographs

Scientific paper

Detailed emission-line imaging of the planetary nebula NGC 6720 (the Ring Nebula) is presented. We map emission-line fluxes of the lines (N II) lambda-lambda(5755, 6583), (S II) lambda-lambda(6717, 6731), (O I) lambda(6300), (O III) lambda(5007), He II lambda(4686), H-alpha, and H-Beta using the Ohio State Imaging Fabry-Perot Spectrograph. From these fluxes we derive maps of the (N II) electron temperature, (S II) electron density, Balmer decrement, and ionization diagnostics across the nebula. A sharp drop in ionization is seen along the entire outer edge of the nebula and the ionization edge is resolved and clumpy. We show that the (O I)-bright filaments are not substantially denser or cooler than the gas in which they are embedded. The (S II) density map shows two strong, clumpy density enhancements on the minor axis of the nebula, inside the outer edge. These density enhancements motivate our model of an oval-shaped toroid for the nebula.

Affiliated with

Also associated with

No associations

Rating

Imaging spectrophotometry of the planetary nebula NGC 6720 (the Ring Nebula) 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 Imaging spectrophotometry of the planetary nebula NGC 6720 (the Ring Nebula), we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Imaging spectrophotometry of the planetary nebula NGC 6720 (the Ring Nebula) will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1021600