Echelle Spectrophotometry of the Orion Nebula

Details Echelle Spectrophotometry of the Orion Nebula Echelle Spectrophotometry of the Orion Nebula

Dec 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996aas...189.4603p&link_type=abstract

American Astronomical Society, 189th AAS Meeting, #46.03; Bulletin of the American Astronomical Society, Vol. 28, p.1333

Astronomy and Astrophysics

Astronomy

1

Scientific paper

We present echelle spectroscopy in the 3550 to 7010 A range for two positions of the Orion Nebula. The data were obtained with the 2.1-m telescope at Observatorio Astronomico Nacional in San Pedro Martir, Baja California. We have measured the intensities of several permitted lines of C(+) , N(+) , N(++) , O(0) , O(+) , Ne(0) , Si(+) , Si(++) which are excited by recombination and fluorescence. We have determined the electron temperature, the electron density and the ionic abundances using different intensity ratios. In particular the O(++) /H(+) abundance obtained by recombination lines is 40% higher than that obtained using forbidden [O III] lines. Moreover the C(++) /H(+) value derived from the recombination C II 4267 line is a factor of two higher than that derived in previous work for the same zone using C III] 1906+1909 collisionally excited lines. We estimate that a moderate value of t(2) = 0.025 +/- 0.015 can account for these discrepancies.

Affiliated with

Also associated with

No associations

Rating

Echelle Spectrophotometry of the Orion 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 Echelle Spectrophotometry of the Orion Nebula, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Echelle Spectrophotometry of the Orion Nebula will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-817008