Soft X-ray Spectra of Seyfert Galaxies
نویسندگان
چکیده
منابع مشابه
Soft X-ray Properties of Narrow-line Seyfert 1 Galaxies
We report on AGN with extremely soft X-ray spectra observed with ROSAT. From their optical emission lines these objects are classiied as narrow-line Seyfert 1 galaxies (NLS1), almost all with extremely large Fe ii/H ratios and relatively narrow optical lines of hydrogen. Our results are based on a systematic ROSAT study of 46 NLS1. 32 of these are located in the elds of view of ROSAT pointings ...
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Soft X-ray spectroscopy of Seyfert 2 galaxies provides perhaps the best method to probe the possible connection between AGN activity and star formation. Obscuration of powerful radiation from the inferred nucleus allows for detailed study of circumnuclear emission regions. And soft X-ray spectroscopy of these regions allows for robust discrimination between warm gas radiatively-driven by the AG...
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The Spitzer IRS high resolution spectra of about 90 Seyfert galaxies from the 12μm Galaxy Sample are presented and discussed. These represent about 70% of the total complete sample of local Seyfert galaxies. The presence of starburst components in these galaxies can be quantified by powerful mid-IR diagnostics tools (i.e. 11.25μm PAH feature equivalent width and the H2 emission line intensity) ...
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We present a catalogue of ROSAT detected sources in the sample of spectroscopically selected Seyfert 1 and Seyfert 2 galaxies of Rafanelli et al. (1995). The catalogue contains 102 Seyfert 1 and 36 Seyfert 2 galaxies. The identification is based on X-ray contour maps overlaid on optical images taken from the Digitized Sky Survey. We have derived the basic spectral and timing properties of the X...
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ژورنال
عنوان ژورنال: Symposium - International Astronomical Union
سال: 1989
ISSN: 0074-1809
DOI: 10.1017/s0074180900140719