Study of Spectral Variability of the Planetary Nebula IC 4997 Over 25 Years (1972-1996)

Details Study of Spectral Variability of the Planetary Nebula IC 4997 Over 25 Years (1972-1996) Study of Spectral Variability of the Planetary Nebula IC 4997 Over 25 Years (1972-1996)

Feb 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002rmxac..12..167k&link_type=abstract

Ionized Gaseous Nebulae, a Conference to Celebrate the 60th Birthdays of Silvia Torres-Peimbert and Manuel Peimbert, Mexico City

Astronomy and Astrophysics

Astronomy

1

Circumstellar Matter, Dust, Extinction, Methods: Numerical, Planetary Nebulae: Individual (V605 Aql)

Scientific paper

The spectrum of the planetary nebula IC 4997 was observed photographically in Crimea in 1972-1996. The objective prism spectrograms were used for estimation of the flux in eleven bright emission lines of the nebula and in the continuum of the central star. Most spectral characteristics were found to change in time. The ratio R of the [O III] lambda 4363 and H gamma fluxes exhibited the greatest change over 1972-1996; this ratio reached a maximum ( logR = + 0.28) in 1992. In the next years it began to decrease. Increases in the excitation and ionization degrees of the nebula were detected.

Affiliated with

Also associated with

No associations

Rating

Study of Spectral Variability of the Planetary Nebula IC 4997 Over 25 Years (1972-1996) 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 Study of Spectral Variability of the Planetary Nebula IC 4997 Over 25 Years (1972-1996), we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Study of Spectral Variability of the Planetary Nebula IC 4997 Over 25 Years (1972-1996) will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1043402