Other
Scientific paper
Dec 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...211.6219y&link_type=abstract
American Astronomical Society, AAS Meeting #211, #62.19; Bulletin of the American Astronomical Society, Vol. 39, p.850
Other
1
Scientific paper
We present surface magnetic field measurments of 15 T Tauri stars in the Orion Nebula Cluster (ONC). For these objects, high resolution (R 40,000) K band echelle spectra were obtained with the Phoenix Spectrometer on the Gemini South telescope. By analyzing and modeling the Zeeman broadening in three magnetically sensitive Ti I lines near 2.2 microns, we measure the mean magnetic field strength that is averaged over the stellar surface. We then compare the average field strength as well as the average mangetic flux of these ONC stars( 1 Myrs old) with that of pre-main sequence stars in other clusters of different ages, such as Taurus-Auriga association ( 3 Myrs old) and TW Hydrae association (TWA, 10 Myrs old), and discuss how this could shed some light on the origin of the magnetic fields on T Tauri stars. And we also discuss whether the X-ray properties of these ONC stars fit into the correlation of X-ray luminosities and stellar magnetic flux discovered by Pevtsov et al. (2003). This study is partially supported by the NASA Origins program through grant number NAG5-13103.
Johns-Krull Christopher M.
Yang Hao
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