Detection of Photodissociated Gas Toward the HII Region GGD12-15
We present VLA continuum (2, 3.6 and 20 cm) and line (H~I 21 cm, H92alpha and C92alpha) observations toward the cometary-like H~II region near the optical nebulosities GGD~12--15. The hydrogen recombination line (RRL) observations show that the ionized gas is undergoing a champagne flow. The carbon...
| Autores: | , , , , , , |
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| Formato: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2001 |
| País: | México |
| Recursos: | Universidad Nacional Autónoma de México |
| Repositorio: | Redalyc-UNAM |
| OAI Identifier: | oai:redalyc.org:57101124 |
| Acesso em linha: | https://www.redalyc.org/articulo.oa?id=57101124 |
| Access Level: | acceso abierto |
| Palavra-chave: | Física, Astronomía y Matemáticas |
| Resumo: | We present VLA continuum (2, 3.6 and 20 cm) and line (H~I 21 cm, H92alpha and C92alpha) observations toward the cometary-like H~II region near the optical nebulosities GGD~12--15. The hydrogen recombination line (RRL) observations show that the ionized gas is undergoing a champagne flow. The carbon RRL and the 21~cm emission detected toward the H~II region have line center velocities similar to the velocity of the ambient molecular cloud. Both the carbon RRL and H~I emissions are interpreted as arising from the photodissociated gas around the H~II region. Using an isothermal model for photodissociated regions (PDRs) we estimate the physical parameters of this region. |
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