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Broad-band properties of the CfA Seyfert Galaxies. II - Infrared to millimeter propertiesIR and mm observations of the 48 Seyfert 1 and 2 galaxies (SG1s and SG2s) of the CfA sample (Huchra and Berg, 1987) are reported. Data obtained (1) in the NIR using the 1.55-m reflector at Stewart Observatory and the 3-m IRTF during 1984-1986, (2) in the FIR with IRAS, and (3) at 1.3 mm using the 12-m NRAO telescope at KPNO in June 1984 are presented in extensive tables and graphs and characterized in detail. None of the objects was detected at 1.3 mm, and the IR spectra of the SG2s are found to be significantly steeper (indicating thermal emission) than those of SG1s and QSOs (nonthermal emission). Turnover in the IR emission below 100 microns (in half of the objects detected at three or more IRAS wavelengths) is shown to be consistent with an accretion disk in dust-free SG1s and with unusually warm (35-65 K) dust in SG2s. It is inferred that a 60-100-micron cool excess is masking turnover in the other SGs, so that a general association of SG nuclei with strong star formation can be confirmed.
Document ID
19880024389
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Edelson, R. A.
(Owens Valley Radio Observatory Pasadena, CA, United States)
Malkan, M. A.
(California, University Los Angeles, United States)
Rieke, G. H.
(Steward Observatory Tucson, AZ, United States)
Date Acquired
August 13, 2013
Publication Date
October 1, 1987
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 321
ISSN: 0004-637X
Subject Category
Astrophysics
Accession Number
88A11616
Funding Number(s)
CONTRACT_GRANT: NSF AST-84-12473
CONTRACT_GRANT: NSF AST-85-52643
CONTRACT_GRANT: NAS7-918
CONTRACT_GRANT: NSF AST-83-14134
Distribution Limits
Public
Copyright
Other

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