An excited H2 disk and the core structure of the extraordinary bipolar planetary nebula KjPn 8
Por:
López J.A., Meaburn J., Kuhn O., Rodríguez L.F., Muxlow T.W.B., Pedlar A., Thomasson P.
Publicada:
1 ene 1999
Resumen:
A disk of excited H2v = 1 ? 0 S(1) (2.122 ?m) emission has been found in the core of the extraordinary bipolar planetary nebula KjPn 8. This surrounds the central, extended, and clumpy thermal radio emission (VLA) and near-infrared (J, H, and K? bands) source. The H2 disk is found to be contained within a previously found expanding CO disk, and they share the same orientation. The plane of the H2 disk is perpendicular to the high-velocity bipolar outflows. The 4? diameter core of KjPn 8 has also been observed for 37 on-source hours at a wavelength of 6 cm with the MERLIN radio interferometer with an angular resolution of 0?.05. The data have been combined with 4 hr of VLA-A observations at the same wavelength but where the resolution is 0?.5. The most remarkable feature of these radio observations is the possible presence of a weak "point" radio source embedded in the center of the H2 disk. It is thought plausible that this point source may be direct emission from the powerful, ionized wind of the central star that now drives this nebulosity.
Filiaciones:
López J.A.:
Instituto de Astronomía, UNAM, Apdo. Postal 877, Ensenada, B.C. 22800, Mexico
Meaburn J.:
Department of Physics and Astronomy, University of Manchester, Oxford Road, Manchester, M13 9PL, United Kingdom
Kuhn O.:
Instituto de Astronomía, UNAM, Apdo. Postal 877, Ensenada, B.C. 22800, Mexico
Rodríguez L.F.:
Instituto de Astronomía, UNAM, Apdo. Postal 70-264, México D.F., 04510, Mexico
Muxlow T.W.B.:
Nuffield Radio Astron. Laboratories, Jodrell Bank, Macclesfield, Cheshire, SK11 9DL, United Kingdom
Pedlar A.:
Nuffield Radio Astron. Laboratories, Jodrell Bank, Macclesfield, Cheshire, SK11 9DL, United Kingdom
Thomasson P.:
Nuffield Radio Astron. Laboratories, Jodrell Bank, Macclesfield, Cheshire, SK11 9DL, United Kingdom
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