Open AccessThe bipolarity of the highest Galactic latitude planetary nebula, LoTr 5 (PN G339.9+88.4), around IN Com
Author(s) -
Graham M. F.,
Meaburn J.,
López J. A.,
Harman D. J.,
Holloway A. J.
Publication year - 2004
Publication title -
monthly notices of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.058
H-Index - 383
eISSN - 1365-2966
pISSN - 0035-8711
DOI - 10.1111/j.1365-2966.2004.07342.x
Subject(s) - physics , doubly ionized oxygen , planetary nebula , astrophysics , nebula , astronomy , telescope , latitude , line (geometry) , emission nebula , emission spectrum , spectral line , stars , geometry , mathematics
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.