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Title:
X-ray sources in regions of star formation. III - Naked T Tauri stars associated with the Taurus-Auriga complex
Authors:
Walter, Frederick M.; Brown, A.; Mathieu, R. D.; Myers, P. C.; Vrba, F. J.
Affiliation:
AA(Colorado, University, Boulder), AB(Colorado, University, Boulder), AC(Harvard-Smithsonian Center for Astrophysics, Cambridge, MA), AD(Harvard-Smithsonian Center for Astrophysics, Cambridge, MA), AE(U.S. Naval Observatory, Flagstaff, AZ)
Publication:
Astronomical Journal (ISSN 0004-6256), vol. 96, July 1988, p. 297-325. (AJ Homepage)
Publication Date:
07/1988
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
STAR FORMATION, STELLAR SPECTROPHOTOMETRY, T TAURI STARS, X RAY SOURCES, EARLY STARS, INFRARED ASTRONOMY, MOLECULAR CLOUDS
DOI:
10.1086/114809
Bibliographic Code:
1988AJ.....96..297W

Abstract

The authors report results from a multispectral investigation of stellar counterparts of X-ray sources in the general region of the Taurus-Auriga star-formation complex. They discuss 28 new low-mass pre-main-sequence "naked T Tauri" stars, bringing the census of naked T Tauri stars to 44 in the Tau-Aur region. The authors discuss the optical spectra and the optical and near-IR colors. They show that these stars are basically normal stars with ages of 1 - 40×106yr. There is no evidence for IR or UV excesses. Chromospheric and coronal surface fluxes are comparable to those of the most active main-sequence stars and the RS CVn systems. The authors show that the chromospheric fluxes do not increase for stellar ages <108yr, confirming the postulated exponential decay of stellar activity.

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