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Title:
Infrared polarimetry of nine Seyfert galaxies
Authors:
Rudy, R. J.; Levan, P. D.; Puetter, R. C.; Smith, H. E.; Willner, S. P.
Affiliation:
AA(California, University, La Jolla, CA), AB(California, University, La Jolla, CA), AC(California, University, La Jolla, CA), AD(California, University, La Jolla, CA), AE(California, University, La Jolla, CA)
Publication:
Astrophysical Journal, Part 1, vol. 253, Feb. 1, 1982, p. 53-57. Research supported by the California Space Institute (ApJ Homepage)
Publication Date:
02/1982
Category:
Astronomy
Origin:
STI
NASA/STI Keywords:
Infrared Astronomy, Polarimetry, Seyfert Galaxies, Cosmic Dust, Galactic Nuclei, Spectrophotometry
DOI:
10.1086/159609
Bibliographic Code:
1982ApJ...253...53R

Abstract

No polarizations greater than 2-3% are detected at a 95% confidence level in measurements of the polarization of nine Seyfert galaxies at 2.3 microns. It is suggested after considering mechanisms that could weaken or modify a strongly polarized nonthermal component that the small polarizations may be explained if the IR fluxes are similar in nature to those of the low-polarization QSOs, although the photometric variability observed in the type 1 Seyfert nuclei contradicts such similarities. It is concluded that the observations are consistent with, but not conclusive evidence of, thermal emission by dust as the source of the near-IR excesses in the present Seyfert galaxies.

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