A comparison of the radio and optical time-evolution of HH 1 and 2
We present a comparison between the time-evolution over the past ≈ 20 years of the radio continuum and Hα emission of HH 1 and 2. We find that the radio continuum and the Hα emission of both objects show very similar trends, with HH 1 becoming fainter and HH 2 brightening quite considerably (by abou...
| Autores: | , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2018 |
| País: | México |
| Institución: | Universidad Nacional Autónoma de México |
| Repositorio: | Redalyc-UNAM |
| OAI Identifier: | oai:redalyc.org:57171626004 |
| Acceso en línea: | https://www.redalyc.org/articulo.oa?id=57171626004 https://www.redalyc.org/journal/571/57171626004/ https://www.redalyc.org/journal/571/57171626004/html/ https://www.redalyc.org/journal/571/57171626004/57171626004.epub https://www.redalyc.org/journal/571/57171626004/movil |
| Access Level: | acceso abierto |
| Palabra clave: | Física, Astronomía y Matemáticas Herbig outflows shock waves Haro objects stars: winds |
| Sumario: | We present a comparison between the time-evolution over the past ≈ 20 years of the radio continuum and Hα emission of HH 1 and 2. We find that the radio continuum and the Hα emission of both objects show very similar trends, with HH 1 becoming fainter and HH 2 brightening quite considerably (by about a factor of 2). We also find that the FHα/Fff (Hα to free-free continuum) ratio of HH 1 and 2 has higher values than the ones typically found in planetary nebulae (PNe), which we interpret as an indication that the Hα and free-free emission of HH 1/2 is produced in emitting regions with lower temperatures (≈ 2000 K) than the emission of PNe (with ≈ 104 K). |
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