The continuum of type 1 Seyfert galaxies. II - Separating thermal and nonthermal components

N. P. Carleton; Martin Elvis; G. Fabbiano; S. P. Willner; A. Lawrence; Martin Ward

doi:10.1086/165396

The continuum of type 1 Seyfert galaxies. II - Separating thermal and nonthermal components

N. P. Carleton, Martin Elvis, G. Fabbiano, S. P. Willner, A. Lawrence, Martin Ward

School of Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

Abstract

The authors attempt to distinguish between thermal and nonthermal contributions to the 1 to 100 μm continuum in a sample of active galactic nuclei. The sample is dominated by the members of a hard X-ray selected sample; most members are Seyfert 1 galaxies. It is postulated that the nonthermal continua of all the objects are intrinsically similar, with the apparent "steep spectrum" objects showing a combination of reddening at shorter wavelengths and thermal emission by dust at longer wavelengths. Various evidence is presented lending strong support to this interpretation. The spatial and temperature distribution of the infrared-emitting dust component in the nuclei of the sample galaxies is discussed.

Original language	English
Pages (from-to)	595-611
Journal	Astrophysical Journal
Volume	318
DOIs	https://doi.org/10.1086/165396
Publication status	Published - 1 Jul 1987

Keywords / Materials (for Non-textual outputs)

Astronomical Spectroscopy
Continuous Spectra
Galactic Nuclei
Infrared Spectra
Seyfert Galaxies
Thermal Emission
Balmer Series
Emission Spectra
Spectrum Analysis
X Ray Spectra

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10.1086/165396

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@article{06ebcbd44f334654a6e4aa3d67b26d83,

title = "The continuum of type 1 Seyfert galaxies. II - Separating thermal and nonthermal components",

abstract = "The authors attempt to distinguish between thermal and nonthermal contributions to the 1 to 100 μm continuum in a sample of active galactic nuclei. The sample is dominated by the members of a hard X-ray selected sample; most members are Seyfert 1 galaxies. It is postulated that the nonthermal continua of all the objects are intrinsically similar, with the apparent {"}steep spectrum{"} objects showing a combination of reddening at shorter wavelengths and thermal emission by dust at longer wavelengths. Various evidence is presented lending strong support to this interpretation. The spatial and temperature distribution of the infrared-emitting dust component in the nuclei of the sample galaxies is discussed.",

keywords = "Astronomical Spectroscopy, Continuous Spectra, Galactic Nuclei, Infrared Spectra, Seyfert Galaxies, Thermal Emission, Balmer Series, Emission Spectra, Spectrum Analysis, X Ray Spectra",

author = "Carleton, \{N. P.\} and Martin Elvis and G. Fabbiano and Willner, \{S. P.\} and A. Lawrence and Martin Ward",

year = "1987",

month = jul,

day = "1",

doi = "10.1086/165396",

language = "English",

volume = "318",

pages = "595--611",

journal = "Astrophysical Journal",

issn = "0004-637X",

publisher = "American Astronomical Society",

}

TY - JOUR

T1 - The continuum of type 1 Seyfert galaxies. II - Separating thermal and nonthermal components

AU - Carleton, N. P.

AU - Elvis, Martin

AU - Fabbiano, G.

AU - Willner, S. P.

AU - Lawrence, A.

AU - Ward, Martin

PY - 1987/7/1

Y1 - 1987/7/1

N2 - The authors attempt to distinguish between thermal and nonthermal contributions to the 1 to 100 μm continuum in a sample of active galactic nuclei. The sample is dominated by the members of a hard X-ray selected sample; most members are Seyfert 1 galaxies. It is postulated that the nonthermal continua of all the objects are intrinsically similar, with the apparent "steep spectrum" objects showing a combination of reddening at shorter wavelengths and thermal emission by dust at longer wavelengths. Various evidence is presented lending strong support to this interpretation. The spatial and temperature distribution of the infrared-emitting dust component in the nuclei of the sample galaxies is discussed.

AB - The authors attempt to distinguish between thermal and nonthermal contributions to the 1 to 100 μm continuum in a sample of active galactic nuclei. The sample is dominated by the members of a hard X-ray selected sample; most members are Seyfert 1 galaxies. It is postulated that the nonthermal continua of all the objects are intrinsically similar, with the apparent "steep spectrum" objects showing a combination of reddening at shorter wavelengths and thermal emission by dust at longer wavelengths. Various evidence is presented lending strong support to this interpretation. The spatial and temperature distribution of the infrared-emitting dust component in the nuclei of the sample galaxies is discussed.

KW - Astronomical Spectroscopy

KW - Continuous Spectra

KW - Galactic Nuclei

KW - Infrared Spectra

KW - Seyfert Galaxies

KW - Thermal Emission

KW - Balmer Series

KW - Emission Spectra

KW - Spectrum Analysis

KW - X Ray Spectra

U2 - 10.1086/165396

DO - 10.1086/165396

M3 - Article

SN - 0004-637X

VL - 318

SP - 595

EP - 611

JO - Astrophysical Journal

JF - Astrophysical Journal

ER -

The continuum of type 1 Seyfert galaxies. II - Separating thermal and nonthermal components

Abstract

Keywords / Materials (for Non-textual outputs)

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