The UV spectrum of the narrow emission line X-ray emitting nucleus of the galaxy NGC 7582

Details The UV spectrum of the narrow emission line X-ray emitting nucleus of the galaxy NGC 7582 The UV spectrum of the narrow emission line X-ray emitting nucleus of the galaxy NGC 7582

Sep 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980mnras.192..769c&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 192, Sept. 1980, p. 769-777.

Astronomy and Astrophysics

Astronomy

12

Emission Spectra, Galactic Nuclei, Spiral Galaxies, Stellar Spectra, Ultraviolet Astronomy, X Ray Sources, Hot Stars, Iue, Line Spectra, Spectral Energy Distribution, Spectrophotometry, Stellar Models, X Ray Spectra

Scientific paper

UV spectra of the narrow emission line, X-ray emitting nucleus of the galaxy NGC 7582 obtained with the IUE instrument show a steep featureless continuum, obeying a power-law of spectral index 3.4 + or - 0.4, close to the value of Ward et al. (1978) for the visible spectrum (spectral index equal to 3). The visual extinction on the line-of-sight of the source of continuum was derived from the strength of the 2200 A feature, and is found to be much smaller than the one deduced for the emission-line region by Ward et al. (1980). The total energy distribution cannot be accounted for in terms of a hot star model, but is rather well represented by a power-law spectrum of spectral index 2.1 suffering a total absorption corresponding to a reddening of 0.45. From the presence of a jump in the continuum near 3600 A, it is estimated that hot stars must contribute approximately 30% of the flux at visible wavelengths. The column density of gas in front of the source of continuum is 2.5 + or - 1.7 x 10 to the 21st atom/sq cm, so that a low-energy cut-off in the X-ray spectrum should be observed around 0.75 keV. The absence of emission lines in the UV range is consistent with the high value of the extinction for the line-emitting region found by Ward et al. (1980).

Affiliated with

Also associated with

No associations

Rating

The UV spectrum of the narrow emission line X-ray emitting nucleus of the galaxy NGC 7582 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 The UV spectrum of the narrow emission line X-ray emitting nucleus of the galaxy NGC 7582, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The UV spectrum of the narrow emission line X-ray emitting nucleus of the galaxy NGC 7582 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-908278