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Detection of Molecular Hydrogen Emission Associated with LkHα 264
We have detected the emission of molecular hydrogen from a classicalTTauri star, LkHα264 in the v = 1 - 0 S(1) line at 2.122μm. Theline velocity is coincident with the rest velocity of the star. The lineprofile is well reproduced by a model in which the line emanates frommaterial in a Keplerian rotating circumstellar disk. Fluorescence byX-ray ionization and shock excitation due to accretion or a low-velocitywind are considered for the emission mechanism of molecular hydrogen.
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Observation and Astrometry data
| Constellation: | おひつじ座 |
| Right ascension: | 02h59m15.45s |
| Declination: | +25°27'57.3" |
| Apparent magnitude: | 9.135 |
| Proper motion RA: | -5.6 |
| Proper motion Dec: | -1.7 |
| B-T magnitude: | 9.427 |
| V-T magnitude: | 9.16 |
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