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The hidden nuclear spectrum of the luminous IRAS source FSC 10214+4724Optical spectropolarimetry of the luminous IRAS source FSC 10214+4724 (z=2.286) reveals that the strong (approximately 17%) linear polarization detected by Lawrence et al. is shared by both the narrow ultraviolet (UV) emission lines and the underlying continuum. This observation and the brightness of the source rule out synchrotron emission and dichroic extinction by dust as the polarizing mechanism, leaving scattering as the only plausible cause of the polarized emission. The narrowness of the lines requires that the scatterers be dust grains or cool (below 1.6 x 10(exp 4) K) electrons. We can recover the spectrum that is incident on the scattering medium provided we make some reasonable assumptions regarding the source geometry. The scattered UV spectrum has a power-law index alpha of -1.2 plus or minus 0.6 (F(sub nu) varies as nu(sup alpha)), steeper than would be expected from a young burst of star formation but similar to that of many active galactic nucleus (AGNs).
Document ID
19950028602
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Jannuzi, Buell T.
(Institute for Advanced Study, Princeton, NJ United States)
Elston, Richard
(CTIO La Serena, Chile)
Schmidt, Gary D.
(Univ. of Arizona, Tucson, AZ United States)
Smith, Paul S.
(Univ. of Arizona, Tucson, AZ United States)
Stockman, H. S.
(Space Telescope and Science Institute, Baltimore, MD United States)
Date Acquired
August 16, 2013
Publication Date
July 10, 1994
Publication Information
Publication: The Astrophysical Journal
Volume: 429
Issue: 2 pt
ISSN: 0004-637X
Subject Category
Astronomy
Accession Number
95A60201
Funding Number(s)
CONTRACT_GRANT: NAS5-26555
CONTRACT_GRANT: HF-1045.01-93A
CONTRACT_GRANT: NAG 5-1630
CONTRACT_GRANT: AST 91-14087
Distribution Limits
Public
Copyright
Other

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