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Title:
The smothered coronae of T Tauri stars
Authors:
Walter, F. M.; Kuhi, L. V.
Affiliation:
AA(California, University, Berkeley, CA)
Publication:
Astrophysical Journal, Part 1, vol. 250, Nov. 1, 1981, p. 254-261. (ApJ Homepage)
Publication Date:
11/1981
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
Early Stars, Stellar Coronas, Stellar Envelopes, Stellar Spectra, T Tauri Stars, X Ray Sources, Chromosphere, Spectrum Analysis, Stellar Luminosity, Stellar Magnitude, Stellar Rotation
DOI:
10.1086/159370
Bibliographic Code:
1981ApJ...250..254W

Abstract

Einstein IPC observations of 10 fields containing pre-main-sequence stars are presented. The detection of significant soft X-ray flux from eight cataloged T Tauri stars plus the optical identification of two new T Tauri-like stars associated with X-ray sources are reported. It is demonstrated than an inverse correlation between the H-alpha equivalent width and the detection of X-ray flux exists. This is interpreted in terms of a model wherein the X-ray emission arises in a corona similar to that of active late-type stars, which is small compared to the extent of the circumstellar envelope. It is postulated that the lack of correlation of X-ray flux (or H-alpha) with A(v) is due to a lack of grains in the envelopes of the more active T Tauri stars.

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