Stability of thermal structures with an internal heating source
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| Natura: | Artículo científico |
| Lingua: | en |
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Sociedad Mexicana de Física A.C.
2008
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| _version_ | 1876478593697054720 |
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| author | N. Sánchez |
| author_facet | N. Sánchez |
| contents | Stability of thermal structures with an internal heating source N. Sánchez E. López Física, Astronomía y Matemáticas Hydrodynamics instabilities interstellar medium We study the thermal equilibrium and stability of isobaric, spherical structures having a radiation source located at their center. The thermalconduction coefficient, external heating and cooling rates are represented as power laws of the temperature. The internal heating decreaseswith distance from the source r approximately as » exp(¡¿ )=r2, ¿ being the optical depth. We find that the influence of the radiationsource is important only in the central region, but its effect is enough to make the system thermally unstable above a certain threshold centraltemperature. This threshold temperature decreases as the internal heating efficiency increases, but, otherwise, it does not depend on thestructure size. Our results suggest that a solar-like star migrating into a diffuse interstellar region may destabilize the surrounding medium 2008 artículo científico 0035-001X https://www.redalyc.org/articulo.oa?id=57054201 en http://www.redalyc.org/revista.oa?id=570 Revista Mexicana de Física application/pdf Sociedad Mexicana de Física A.C. Revista Mexicana de Física (México) Num.2 Vol.54 |
| format | Artículo científico |
| id | redalyc_57054201 |
| institution | Redalyc |
| language | en |
| publishDate | 2008 |
| publisher | Sociedad Mexicana de Física A.C. |
| spellingShingle | Stability of thermal structures with an internal heating source N. Sánchez Física, Astronomía y Matemáticas Hydrodynamics instabilities interstellar medium Stability of thermal structures with an internal heating source N. Sánchez E. López Física, Astronomía y Matemáticas Hydrodynamics instabilities interstellar medium We study the thermal equilibrium and stability of isobaric, spherical structures having a radiation source located at their center. The thermalconduction coefficient, external heating and cooling rates are represented as power laws of the temperature. The internal heating decreaseswith distance from the source r approximately as » exp(¡¿ )=r2, ¿ being the optical depth. We find that the influence of the radiationsource is important only in the central region, but its effect is enough to make the system thermally unstable above a certain threshold centraltemperature. This threshold temperature decreases as the internal heating efficiency increases, but, otherwise, it does not depend on thestructure size. Our results suggest that a solar-like star migrating into a diffuse interstellar region may destabilize the surrounding medium 2008 artículo científico 0035-001X https://www.redalyc.org/articulo.oa?id=57054201 en http://www.redalyc.org/revista.oa?id=570 Revista Mexicana de Física application/pdf Sociedad Mexicana de Física A.C. Revista Mexicana de Física (México) Num.2 Vol.54 |
| title | Stability of thermal structures with an internal heating source |
| topic | Física, Astronomía y Matemáticas Hydrodynamics instabilities interstellar medium |
| url | https://www.redalyc.org/articulo.oa?id=57054201 |