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- W2095998707 abstract "We report high-sensitivity millimeter-wave CO ob- servations of recently discovered bipolar planetary nebulae (PNe). Three objects (BV 5-1, K 3-94 and K 3-24) have been detected, and one of them (BV 5-1) is resolved by the 10 00 telescope beam. The envelopes of the three newly detected ob- jects display values of the molecular to ionized mass ratio of 0.2, and sizes of 0.1 pc. This indicates that these PNe are rather evolved, with K 3-24 being the youngest of the three ( 10 3 years) according to its CO line profile and kinematic ages. In BV 5-1, the molecular gas appears to be distributed in an irregular disk or ring surrounding the central star and per- pendicular to the bipolar nebula. This is similar to the situation found in other better studied bipolar PNe (e.g. NGC 2346, M 2-9, KjPn8), and thus seems to be the rule in this class of ob- jects. This suggests a common mechanism for the rings and the bipolar flows that shape the optical nebula." @default.
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- W2095998707 date "2000-01-01" @default.
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- W2095998707 title "CO content of bipolar planetary nebulae" @default.
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