Chromospheres of T Tauri-type stars
Journal Article
·
· Astron. Astrophys., v. 29, no. 2, pp. 199-205
OSTI ID:4359259
The observed total fluxes of H alpha emission for some 20 T Tauri stars in the Taurus -Auriga cloud are used to test the hypothesis that the observed emission features can be produced by a chromosphere without recourse to an extended envelope. Under the assumption that the Balmer continuum emission is produced in the chromosphere and that H alpha is photoionization dominated, total emission fluxes are obtained that are in good agreement with the observed values. However the predicted profiles have a necessary central reversal which is not always present in the observed ones. It is suggested that the agreement can be improved by the introduction of a velocity gradient as required by the present ideas on the existence of chromospheres. (auth)
- Research Organization:
- Institut d'Astrophysique, Paris
- NSA Number:
- NSA-29-016510
- OSTI ID:
- 4359259
- Journal Information:
- Astron. Astrophys., v. 29, no. 2, pp. 199-205, Journal Name: Astron. Astrophys., v. 29, no. 2, pp. 199-205; ISSN AAEJA
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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