Spectral principal component analysis of mid-infrared spectra of a sample of PG QSOs
Monthly Notices of the Royal Astronomical Society(2016)
Abstract
A spectral principal component (SPC) analysis of a sample of 87 Palomar-Green (PG) QSOs at z < 0.5 is presented for their mid-infrared spectra from Spitzer Space Telescope. We have derived the first five eigenspectra, which account for 85.2 per cent of the mid-infrared spectral variation. It is found that the first eigenspectrum represents the mid-infrared slope, forbidden emission line strength a...
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Key words
galaxies: active,galaxies: nuclei,quasars: emission lines,galaxies: starburst,infrared: galaxies
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