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2010MNRAS.408.2312J - Mon. Not. R. Astron. Soc., 408, 2312-2318 (2010/November-2)
Abell 41: shaping of a planetary nebula by a binary central star.
JONES D., LLOYD M., SANTANDER-GARCIA M., LOPEZ J.A., MEABURN J., MITCHELL D.L., O'BRIEN T.J., POLLACCO D., RUBIO-DIEZ M.M. and VAYTET N.M.H.
Abstract (from CDS):
Deep narrow-band imaging in the light of [Nii]6584Å, [Oiii]5007 Å and [Sii]6717+6731Å, obtained using ACAM on the William Herschel Telescope, has been used to investigate the ionization structure of Abell 41. Long-slit observations of the Hα and [Nii]6584Å emission were obtained using the Manchester Echelle Spectrometer on the 2.1-m San Pedro Mártir Telescope. These spectra, combined with the narrow-band imagery, were used to develop a spatiokinematical model of [Nii]6584Å emission from Abell 41. The best-fitting model reveals Abell 41 to have a waisted, bipolar structure with an expansion velocity of ∼40 km/s at the waist. The symmetry axis of the model nebula is within 5° of perpendicular to the orbital plane of the central binary system. This provides strong evidence that the close-binary system, MT Ser, has directly affected the shaping of its nebula, Abell 41.
Although the theoretical link between bipolar planetary nebulae and binary central stars is long established, this nebula is only the second to have this link, between nebular symmetry axis and binary plane, proved observationally.
Abstract Copyright: © 2010 The Authors. Journal compilation © 2010 RAS
Journal keyword(s): circumstellar matter - binaries: close - stars: mass-loss - stars: winds, outflows - planetary nebulae: individual: Abell 41 - planetary nebulae: individual: PN G009.6+10.5
Simbad objects: 7
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