A Hidden Broad‐Line Region in the Weak Seyfert 2 Galaxy NGC 788
Author(s) -
L. E. Kay,
Edward C. Moran
Publication year - 1998
Publication title -
publications of the astronomical society of the pacific
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.294
H-Index - 172
eISSN - 1538-3873
pISSN - 0004-6280
DOI - 10.1086/316224
Subject(s) - physics , starlight , astrophysics , galaxy , luminous infrared galaxy , astronomy , polarization (electrochemistry) , radio galaxy , luminosity , peculiar galaxy , disc galaxy , stars , chemistry
We have detected a broad H alpha emission line in the polarized flux spectrumof the Seyfert 2 galaxy NGC 788, indicating that it contains an obscuredSeyfert 1 nucleus. While such features have been observed in ~15 other Seyfert2s, this example is unusual because it has a higher fraction of galaxystarlight in its spectrum, a lower average measured polarization, and asignificantly lower radio luminosity than other hidden Seyfert 1s discovered todate. This demonstrates that polarized broad-line regions can be detected inrelatively weak classical Seyfert 2s, and illustrates why well-defined,reasonably complete spectropolarimetric surveys at H alpha are necessary inorder to assess whether or not all Seyfert 2s are obscured Seyfert 1s.Comment: 10 pages using (AASTEX) aaspp4.sty and 4 postscript figures. Publications of the Astronomical Society of the Pacific, Research Notes, in pres
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