Astronomy and Astrophysics – Astrophysics
Scientific paper
Jul 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983apj...270...71p&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 270, July 1, 1983, p. 71-78.
Astronomy and Astrophysics
Astrophysics
20
Astronomical Spectroscopy, Atmospheric Effects, H Beta Line, Oxygen Spectra, Seyfert Galaxies, Brightness Distribution, Flux (Rate), Forbidden Transitions, Spectral Line Width
Scientific paper
The possible effects of seeing on the forbidden O III/H-beta flux ratio and H-beta equivalent width in Seyfert 1 spectra is quantitatively investigated in order to estimate how variable seeing might affect measurements made under different conditions with a single instrument or with different instruments of nearly identical entrance aperture. A seeing-convolved model of the radial surface brightness distribution for circularly symmetric face-on galaxies is constructed. It is found that seeing variations alone cannot systematically affect measurements of the H-beta equivalent width in Seyfert 1 spectra by more than about ten percent under reasonable observing conditions. The forbidden line O III/H-beta flux ratio is also not affected by more than ten percent where the spectrograph entrance aperture projects to more than twice the size of the narrow line region. For apertures close to the size of the narrow line region, seeing alone can systematically affect that ratio at the 25 percent level.
Collins George W. II
Peterson Bradley. M.
No associations
LandOfFree
The effects of seeing on spectral line measurements in Seyfert 1 galaxies 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 effects of seeing on spectral line measurements in Seyfert 1 galaxies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The effects of seeing on spectral line measurements in Seyfert 1 galaxies will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1626968