Evidence for an InterMediate Line Region in AGN's Inner Torus Region and Its Evolution from Narrow to Broad Line Seyfert I Galaxies

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dc.creatorZhu, Ling
dc.creatorZhang, ShuangNan
dc.creatorTang, Sumin
dc.date2009-01-15
dc.date.accessioned2026-07-07T12:32:02Z
dc.date.available2026-07-07T12:32:02Z
dc.descriptionWe have decomposed the broad H-alpha, H-beta and H-gamma lines of 90 Active Galactic Nuclei (AGNs) into a superposition of a very broad and an intermediate Gaussian components (VBGC and IMGC) and discovered that the two Gaussian components evolve with FWHM of the whole emission lines. We suggest that the VBGC and the IMGC are produced in different emission regions, namely, Very Broad Line Region (VBLR) and Intermediate Line Region (IMLR). The details of the two components of H-alpha, H-beta and H-gamma lines indicate that the radius obtained from the emission line reverberation mapping normally corresponds to the radius of the VBLR, but the radius obtained from the infrared reverberation mapping corresponding to IMLR, i.e., the inner boundary of the dusty torus. The existence of the IMGC may affect the measurement of the black hole mass in AGNs. Therefore, the deviation of NLS1s from the M-sigma relation may be explained naturally in this way. The evolution of the two emission line regions may be related to the evolutionary stages of the broad line regions of AGNs from NLS1s to BLS1s. Other evidences for the existence of the IMLR are also presented.
dc.description4 pages, 6 figures, 10th-APRIM-2008-Kunming-Session-3
dc.identifierhttps://arxiv.org/abs/0901.2167
dc.identifierhttp://arxiv.org/abs/0901.2167
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/216648
dc.subjectAstrophysics of Galaxies
dc.titleEvidence for an InterMediate Line Region in AGN's Inner Torus Region and Its Evolution from Narrow to Broad Line Seyfert I Galaxies
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