Einstein Observations of T Tauri Stars in Taurus-Auriga. I. Properties of X-Ray Emission
1995; IOP Publishing; Volume: 446; Linguagem: Inglês
10.1086/175791
ISSN1538-4357
AutoresF. Damiani, G. Micela, S. Sciortino, Jr. Harnden F. R.,
Tópico(s)Astro and Planetary Science
Resumoview Abstract Citations (38) References (64) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Einstein Observations of T Tauri Stars in Taurus-Auriga. I. Properties of X-Ray Emission Damiani, F. ; Micela, G. ; Sciortino, S. ; Harnden, F. R., Jr. Abstract We present a systematic reanalysis of the Einstein IPC X-ray data on the pre-main-sequence stars in the Taurus-Auriga star formation region. We consider all cataloged stars in this region which have been observed with the IPC; of these, 52 out of 68 can be identified with X-ray sources; upper limits on the X-ray luminosity have been evaluated in the remaining cases. We derive an X-ray luminosity function and argue that its median Lx is representative of the population intrinsic value, in spite of incompleteness of the sample and possible ambiguities in the X-ray source identifications. As a result, it is confirmed that the known steady increase in the average level of X-ray emission toward younger ages can be extended to the pre-main-sequence phase. By using the line equivalent width as the relevant parameter, a statistically significant difference is found between the distributions of X-ray luminosities of stars with and without strong emission lines. No such difference is found instead between stars with and without strong infrared excess at 25 μm. Publication: The Astrophysical Journal Pub Date: June 1995 DOI: 10.1086/175791 Bibcode: 1995ApJ...446..331D Keywords: STARS: ACTIVITY; STARS: PRE-MAIN-SEQUENCE; X-RAYS: STARS full text sources ADS | data products SIMBAD (69) Related Materials (1) Part 2: 1995ApJ...446..341D
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