Narrow vs. broad-line Seyfert 1 galaxies: X-ray, optical, and mid-infrared AGN characteristics
Monthly Notices of the Royal Astronomical Society, ISSN: 1365-2966, Vol: 478, Issue: 3, Page: 4068-4083
2018
- 6Citations
- 8Captures
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Article Description
Investigated narrow-line Seyfert 1 galaxies (NLS1s) at optical, mid-infrared (MIR), and X-ray wavelengths, comparing them to the broad-line active galactic nuclei (BLAGNs). We found that black hole mass, coronal line luminosities, X-ray hardness ratio and X-ray, and optical and MIR luminosities are higher for the BLAGNs than for NLS1s, while policyclic aromatic hydrocarbon (PAH) contribution and the accretion rates are higher for NLS1s. Furthermore, we found some trends among spectral parameters that NLS1s have and BLAGNs do not have. The evolution of FWHM(Hβ) with the luminosities of MIR and coronal lines, continuum luminosities, PAHcontribution, Hβ broad line luminosity, FWHM[OIII], and EW(HβNLR) are important trends found forNLS1s. That may contribute to the insight that NLS1s are developing AGNs, growing their black holes, while their luminosities andFWHM(Hβ) consequently grow, and that BLAGNs are mature, larger objects of slower and/or different evolution. Black hole mass is related to PAH contribution only for NLS1s, which may suggest that PAHs are more efficiently destroyed in NLS1s.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85060878033&origin=inward; http://dx.doi.org/10.1093/mnras/sty1299; https://academic.oup.com/mnras/article/478/3/4068/4998878; http://academic.oup.com/mnras/article-pdf/478/3/4068/25079769/sty1299.pdf; https://dx.doi.org/10.1093/mnras/sty1299
Oxford University Press (OUP)
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