| Автор | Jun Yang |
| Автор | Xiang Liu |
| Автор | Zhi-Qiang Shen |
| Дата выпуска | 2005-12-01 |
| dc.description | GHz-Peaked Spectrum (GPS) radio sources are powerful and compact sources with convex spectra. With increasing observational findings, it has been realized that either Synchrotron Self-Absorption (SSA) alone or Free-Free Absorption (FFA) alone is not enough to account for all the spectral features. We present a model consisting of an SSA region partially covered by FFA plasma, and derive a composite spectral formula. By applying the model to a sample of 19 GPS sources having strong absorption, it is found that the external FFA process makes the SSA peak frequency linearly shift to a higher (observed) peak frequency. The shift indicates that the FFA does play a role at the frequency close to the observed peak frequency. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | A Composite Model for GHz Peaked Spectra of Radio Sources |
| Тип | paper |
| DOI | 10.1088/1009-9271/5/6/001 |
| Print ISSN | 1009-9271 |
| Журнал | Chinese Journal of Astronomy and Astrophysics |
| Том | 5 |
| Первая страница | 563 |
| Последняя страница | 570 |
| Выпуск | 6 |
