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The far-infrared spectral energy distributions of quasars
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Wilkes, Belinda J. |
| Copyright Year | 2001 |
| Description | The origin of the infrared emission in Active Galactic Nuclei (AGN), whose strength is comparable to the optical/ultraviolet (OUV) emission, is generally thought to be a combination of thermal emission from dust and non-thermal, synchrotron emission. Although data are sparse, particularly in the far-infrared, the broad wavelength range of this emission suggests a wide range of temperatures and a combination of AGN and starburst heating mechanisms. The strength of the non-thermal emission is expected to be related to the radio emission. While this scenario is well-established, basic questions, such as the spatial and temperature distribution of the dust, the relative importance of AGN and starburst heating, and the significance of the non-thermal contribution remain largely undetermined. The wide wavelength range of the Infrared Space Observatory (ISO) combined with its arcmin spatial resolution and increased sensitivity facilitated the observation of a larger subset of the AGN population than previously covered, allowing these questions to be investigated in more detail. This paper will review the spectral energy distributions (SED) of AGN with particular emphasis on the infrared emission and on ISO's contributions to our knowledge. Preliminary results from ISO observations of X-ray selected and high-redshift AGN will be described. |
| File Size | 770817 |
| Page Count | 14 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20020015932 |
| Archival Resource Key | ark:/13960/t4dn93958 |
| Language | English |
| Publisher Date | 2001-12-01 |
| Access Restriction | Open |
| Subject Keyword | Astronomy Quasars Red Shift Active Galactic Nuclei Thermal Emission Spectral Energy Distribution Infrared Radiation Infrared Astronomy Infrared Space Observatory Iso Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
