Spectropolarimetry of 'narrow-line' Seyfert 1 galaxies
- Lick Observatory, Santa Cruz, CA (USA)
Spectropolarimetry is used here to investigate the properties of 'narrow-line' Seyfert 1 galaxies. In general, continuum polarization arising to the blue and/or the lack of significant broadening of the polarized emission lines points to dust reflection as the primary polarigenic mechanism. There is some evidence that the dust is associated with the forbidden O III-emitting region. Where line polarizations can be compared, H-beta is found to be more highly polarized than the forbidden O III 4959, 5007 A lines A, demonstrating that these lines come from spatially distinct within the nucleus. Simultaneous spectrophotometry obtained by the spectropolarimetry is used to demonstrate that X-ray selected Seyfert 1s show significantly smaller H-beta equivalent widths than a sample of optically selected narrow-line 1s and Seyfert 2s. 51 refs.
- OSTI ID:
- 5509299
- Journal Information:
- Astrophysical Journal; (USA), Journal Name: Astrophysical Journal; (USA) Vol. 342; ISSN ASJOA; ISSN 0004-637X
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BALMER LINES
COSMIC DUST
DUSTS
ELECTROMAGNETIC RADIATION
EMISSION SPECTRA
GALAXIES
GALAXY NUCLEI
IONIZING RADIATIONS
LINE WIDTHS
MARKARIAN GALAXIES
POLARIMETRY
POLARIZATION
RADIATIONS
SEYFERT GALAXIES
SPECTRA
SPECTROSCOPY
VISIBLE RADIATION
X RADIATION