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| Images at 20 cm and the Spectrum Index of NGC 2997 | |
| 作者姓名： | Hui Men and Jin-Lin HanNational Astronomical Observatories Chinese Academy of Sciences Beijing |
| 作者单位： | Hui Men and Jin-Lin HanNational Astronomical Observatories，Chinese Academy of Sciences，Beijing 100012; |
| 基金项目： | SupportedbytheNationalNaturalScienceFoundationofChina. |
| 摘 要： | We present total intensity maps of the galaxy NGC 2997 at frequencies 1435.1MHz (λ21cm) and 1652.4MHz (λ18cm) observed with the Very Large Array (VLA). The high spatial resolution allows us to distinguish two dominant arms. Using multi-frequency data, we separate the thermal and non-thermal contributions to the radio emission. The thermal emission is about 35% of the total emission at λ3 cm. We use it to estimate a space-averaged thermal |
| 关 键 词： | 单体星系 ISM 空间连续射电 热分布 天文观测 |
Images at 20 cm and the Spectrum Index of NGC 2997 |
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| Hui Men and Jin-Lin HanNational Astronomical Observatories,Chinese Academy of Sciences,Beijing ,.Images at 20 cm and the Spectrum Index of NGC 2997[J].Chinese Journal of Astronomy and Astrophysics,2005,5(1):49-56. | |
| Authors: | Hui Men and Jin-Lin HanNational Astronomical Observatories Chinese Academy of Sciences Beijing |
| Institution: | Hui Men and Jin-Lin HanNational Astronomical Observatories,Chinese Academy of Sciences,Beijing 100012, |
| Abstract: | |
| Keywords: | galaxies: individual (NGC 2997) - galaxies: ISM - galaxies: spiral - radio continuum: galaxies |
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