other query modes : |
Identifier query |
Coordinate query |
Criteria query |
Reference query |
Basic query |
Script submission |
TAP |
Output options |
Object types |
Help |
2007MNRAS.374.1404M - Mon. Not. R. Astron. Soc., 374, 1404-1412 (2007/February-1)
Proof of polar ejection from the close-binary core of the planetary nebula Abell 63.
MITCHELL D.L., POLLACCO D., O'BRIEN T.J., BRYCE M., LOPEZ J.A., MEABURN J. and VAYTET N.M.H.
Abstract (from CDS):
Longslit observations were obtained using the Manchester echelle spectrometer combined with the 2.1-m San Pedro Martir Telescope. The spectra reveal that the central bright rim of Abell 63 has a tube-like structure. A deep image shows collimated lobes extending from the nebula, which are shown to be high-velocity outflows. The kinematic ages of the nebular rim and the extended lobes are calculated to be 8400±500 and 12900±2800 yr, respectively, which suggests that the lobes were formed at an earlier stage than the nebular rim. This is consistent with expectations that disc-generated jets form immediately after the common envelope phase.
A morphological-kinematical model of the central nebula is presented and the best-fitting model is found to have the same inclination as the orbital plane of the central binary system; this is the first proof that a close-binary system directly affects the shaping of its nebula. A Hubble-type flow is well-established in the morphological-kinematical modelling of the observed line profiles and imagery.
Two possible formation models for the elongated lobes of Abell 63 are considered, (i) a low-density, pressure-driven jet excavates a cavity in the remnant asymptotic giant branch (AGB) envelope; (ii) high-density bullets form the lobes in a single ballistic ejection event.
Abstract Copyright: 2006 The Authors. Journal compilation © 2006 RAS
Journal keyword(s): circumstellar matter - stars: kinematics - stars: mass-loss - stars: winds, outflows - planetary nebulae: individual: Abell 63
Simbad objects: 8
To bookmark this query, right click on this link: simbad:2007MNRAS.374.1404M and select 'bookmark this link' or equivalent in the popup menu