A new X-ray spectral observation of NGC 1068

Details A new X-ray spectral observation of NGC 1068 A new X-ray spectral observation of NGC 1068

Mar 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...405..168m&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 405, no. 1, p. 168-178.

Astronomy and Astrophysics

Astronomy

111

Seyfert Galaxies, X Ray Astronomy, X Ray Spectra, Astronomical Models, Compton Effect, Line Spectra

Scientific paper

A new X-ray observation of NGC 1068, in which improved spectral resolution (R is approximately equal to 40) and broad energy range provide important new constraints on models for this galaxy, is reported. The observed X-ray continuum of NGC 1068 from 0.3 to 10 keV is well fitted as the sum of two power-law spectra with no evidence for absorption intrinsic to the source. Strong Fe K emission lines with a total equivalent width of 2700 eV were detected due to iron less ionized than Fe XX and to iron more ionized than Fe XXIII. No evidence was seen for lines due to the recombination of highly ionized oxygen with an upper limit for the O Ly-alpha emission line of 40 eV. The discovery of multiple Fe K and Fe L emission lines indicates a broad range of ionization states for this gas. The X-ray emission from the two components is modeled for various geometries using a photoionization code that calculates the temperature and ionization state of the gas. Typical model parameters are a total Compton depth of a few percent, an inner boundary of the hot component of about 1 pc, and an inner boundary of the warm component of about 20 pc.

Affiliated with

Also associated with

No associations

Rating

A new X-ray spectral observation of NGC 1068 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 A new X-ray spectral observation of NGC 1068, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A new X-ray spectral observation of NGC 1068 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1441842