Detection of Molecular Hydrogen Emission Associated with LkH$\alpha$ 264
2003; Oxford University Press; Volume: 55; Issue: 6 Linguagem: Inglês
10.1093/pasj/55.6.l77
ISSN2053-051X
AutoresYoichi Itoh, Koji Sugitani, Katsuo Ogura, Motohide Tamura,
Tópico(s)Atomic and Molecular Physics
ResumoAbstract We have detected the emission of molecular hydrogen from a classical T Tauri star, LkH$\alpha$ 264 in the $v= 1 \hbox{--} 0$ S(1) line at 2.122$\, {\mu \mathrm {m}}$. The line velocity is coincident with the rest velocity of the star. The line profile is well reproduced by a model in which the line emanates from material in a Keplerian rotating circumstellar disk. Fluorescence by X-ray ionization and shock excitation due to accretion or a low-velocity wind are considered for the emission mechanism of molecular hydrogen.
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