The bipolarity of the highest Galactic latitude planetary nebula, LoTr 5 (PN G339.9+88.4), around IN Com
Abstract
High-resolution, spatially resolved, long-slit profiles of the [O III] 5007-Å emission line of the highest Galactic latitude planetary nebula, LoTr 5, have been obtained with the Manchester Echelle Spectrometer (MES-SPM) on the San Pedro Martir (SPM) 2.1-m telescope. These are compared with a deep narrow-band [O III] 5007-Å mosaic image obtained with the same system.
This faint nebula, at a distance of >=500 pc from the Galactic plane, is found to be expanding asymmetrically. Some form of bipolar structure is suggested by modelling the position-velocity arrays of line profiles and the new [O III] 5007-Å image. Interestingly, the modelled bipolar axis is nearly perpendicular to the orbital plane of the IN Com binary system; this supports the theories which predict that binary systems play a part in shaping the outflow. Evidence for interaction of the envelope of LoTr 5 with its local interstellar medium is also considered.- Publication:
-
Monthly Notices of the Royal Astronomical Society
- Pub Date:
- February 2004
- DOI:
- 10.1111/j.1365-2966.2004.07342.x
- Bibcode:
- 2004MNRAS.347.1370G
- Keywords:
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- line: profiles;
- stars: individual: IN Com;
- ISM: kinematics and dynamics;
- planetary nebulae: individual: LoTr 5