UV and optical observations of PG 1351+64, a bright Seyfert galaxy or a low-luminosity QSO⋆
نویسندگان
چکیده
منابع مشابه
Optical Spectroscopy of LINERs and Low-Luminosity Seyfert Nuclei
An unprecedentedly large number of LINERs has been discovered in a recently completed optical spectroscopic survey of nearby galaxies, allowing several statistical properties of the host galaxies and of the line-emitting regions to be examined reliably for the first time. As a consequence of the many detections and some revised classifications, the detailed demographics of emission-line nuclei ...
متن کاملLow-Luminosity Seyfert Nuclei
We describe a new sample of Seyfert nuclei discovered during the course of an optical spectroscopic survey of nearby galaxies. The majority of the objects, many recognized for the first time, have luminosities much lower than those of classical Seyferts and populate the faint end of the AGN luminosity function. A significant fraction of the nuclei emit broad Hα emission qualitatively similar to...
متن کاملHS 1543 + 5921 – a bright z = 0 . 807 QSO in the center of the ‘ Seyfert ’ galaxy SBS 1543 + 593 ?
We show that the 'Seyfert' galaxy SBS 1543+593 is a by-chance projection of the center of a nearby galaxy (z = 0.009) onto the bright QSO HS 1543+5921 (z = 0.807). The quasar has been discovered independently by the Hamburg Quasar Survey, an automated survey for bright QSOs based on digitized objective prism Schmidt plates. Direct imaging and subsequent spectroscopy of a faint (R = 22 m) HII re...
متن کاملThe bright end of the QSO luminosity function
We have analysed the optical luminosity-redshift distribution properties of bright QSOs, using a new large sample from the Hamburg/ESO survey. The sample provides insight into the hitherto poorly sampled bright tail of the luminosity function, allowing to monitor its evolution with redshift up to z ≈ 3. The slope increases significantly towards higher z, inconsistent with the predictions of pur...
متن کاملThe PG X-Ray QSO Sample: Links among X-ray, UV & Optical Spectra
A unique, essentially complete sample of 22 QSOs, with high quality soft X-ray spectra from ROSAT, as well as HST and optical spectrophotometry from below Lyα to above Hα, is being used to investigate the relationships among the ionizing continuum and the optical and UV continuum, emission and absorption lines. Here we present a first analysis showing that optical ‘Eigenvector 1’ linking steepe...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 1985
ISSN: 0035-8711,1365-2966
DOI: 10.1093/mnras/216.3.529