Artículo
Abstract:
Recent ultraviolet observations point out that there is hot, dense plasma associated with the optical jet in some T Tauri stars. In this contribution, cool MHD disk wind physics is reviewed by means of a self-similar analytical model to analyze whether hot (Te ≃ 80,000 K) and dense (ne ≃ 109 cm-3) plasma can be produced in disk winds. It is shown that these high densities can only be achieved at the base of the wind where the stellar X-rays radiation field is strong. The propagation of the X-rays radiation through the disk wind is analyzed: a cocoon of photoionized gas is generated around the star. However, it is difficult to foresee how temperatures as high as ∼ 5 × 104 can be reached unless a significant fraction of the X-rays radiation is produced by magnetic reconnection at the boundary between the stellar magnetosphere and the accretion disk.
Registro:
| Documento: | Artículo |
| Título: | Photoionization of cool MHD disk winds: On the source of the far UV emission lines from T Tauri stars |
| Autor: | Gómez De Castro, A.I.; Ferro-Fontán, C. |
| Filiación: | Inst. de Astron./Geodesia (CSIC-UCM), Facultad de CC Matemáticas, Universidad Complutense de Madrid, 28040 Madrid, Spain Inst. Fis. del Plasma (CONICET-UBA), Facultad de CC. Exactas y Naturales, Universidad de Buenos Aires, Argentina |
| Año: | 2003 |
| Volumen: | 287 |
| Número: | 1-4 |
| Página de inicio: | 31 |
| Página de fin: | 34 |
| DOI: | http://dx.doi.org/10.1023/B:ASTR.0000006196.63731.da |
| Título revista: | Astrophysics and Space Science |
| Título revista abreviado: | Astrophys. Space Sci. |
| ISSN: | 0004640X |
| Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0004640X_v287_n1-4_p31_GomezDeCastro |
Referencias:
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Citas:
---------- APA ----------
Gómez De Castro, A.I. & Ferro-Fontán, C. (2003) . Photoionization of cool MHD disk winds: On the source of the far UV emission lines from T Tauri stars. Astrophysics and Space Science, 287(1-4), 31-34.http://dx.doi.org/10.1023/B:ASTR.0000006196.63731.da
---------- CHICAGO ----------
Gómez De Castro, A.I., Ferro-Fontán, C. "Photoionization of cool MHD disk winds: On the source of the far UV emission lines from T Tauri stars" . Astrophysics and Space Science 287, no. 1-4 (2003) : 31-34.http://dx.doi.org/10.1023/B:ASTR.0000006196.63731.da
---------- MLA ----------
Gómez De Castro, A.I., Ferro-Fontán, C. "Photoionization of cool MHD disk winds: On the source of the far UV emission lines from T Tauri stars" . Astrophysics and Space Science, vol. 287, no. 1-4, 2003, pp. 31-34.http://dx.doi.org/10.1023/B:ASTR.0000006196.63731.da
---------- VANCOUVER ----------
Gómez De Castro, A.I., Ferro-Fontán, C. Photoionization of cool MHD disk winds: On the source of the far UV emission lines from T Tauri stars. Astrophys. Space Sci. 2003;287(1-4):31-34.http://dx.doi.org/10.1023/B:ASTR.0000006196.63731.da
