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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
earth and planetary sciences
The Necklace: Equatorial and polar outflows from the binary central star of the new planetary nebula IPHASXJ194359.5+170901
Monthly Notices of the Royal Astronomical Society, Volume 410, No. 2, Year 2011
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Description
IPHASXJ194359.5+170901 is a new high-excitation planetary nebula with remarkable characteristics. It consists of a knotty ring expanding at a speed of 28 km s-1, and a fast collimated outflow in the form of faint lobes and caps along the direction perpendicular to the ring. The expansion speed of the polar caps is 100 km s-1, and their kinematical age is twice as large as the age of the ring.Time-resolved photometry of the central star of IPHASXJ194359.5+170901 reveals a sinusoidal modulation with a period of 1.16 d. This is interpreted as evidence for binarity of the central star, the brightness variations being related to the orbital motion of an irradiated companion. This is supported by the spectrum of the central star in the visible range, which appears to be dominated by emission from the irradiated zone, consisting of a warm (6000-7000 K) continuum, narrow C iii, C iv and N iii emission lines, and broader lines from a flat H i Balmer sequence in emission.IPHASXJ194359.5+170901 helps to clarify the role of (close) binaries in the formation and shaping of planetary nebulae (PNe). The output of the common-envelope (CE) evolution of the system is a strongly flattened circumstellar mass deposition, a feature that seems to be distinctive of this kind of binary system. Also, IPHASXJ194359.5+170901 is among the first post-CE PNe for which the existence of a high-velocity polar outflow has been demonstrated. Its kinematical age might indicate that the polar outflow is formed before the CE phase. This points to mass transfer on to the secondary as the origin, but alternative explanations are also considered. © 2010 The Authors Monthly Notices of the Royal Astronomical Society © 2010 RAS.
Authors & Co-Authors
Corradi, Romano L.M.
Spain, San Cristobal de la Laguna
Instituto Astrofisico de Canarias
Spain, San Cristobal de la Laguna
Universidad de la Laguna
Miszalski, Brent
United Kingdom, Hatfield
University of Hertfordshire
Rodríguez-Gil, Pablo
Spain, San Cristobal de la Laguna
Instituto Astrofisico de Canarias
Spain, San Cristobal de la Laguna
Universidad de la Laguna
Spain, Santa Cruz de la Palma
Isaac Newton Group
Santander-García, Miguel
Spain, San Cristobal de la Laguna
Instituto Astrofisico de Canarias
Spain, San Cristobal de la Laguna
Universidad de la Laguna
Spain, Santa Cruz de la Palma
Isaac Newton Group
Jones, David
United Kingdom, Manchester
The University of Manchester
Drew, J. E.
United Kingdom, Hatfield
University of Hertfordshire
Mampaso, Antonio
Spain, San Cristobal de la Laguna
Instituto Astrofisico de Canarias
Spain, San Cristobal de la Laguna
Universidad de la Laguna
Barlow, M. J.
United Kingdom, London
University College London
Rubio-Díez, Maria M.
Spain, Santa Cruz de la Palma
Isaac Newton Group
Spain, Madrid
Instituto Nacional de Tecnica Aeroespacial
Casares, J.
Spain, San Cristobal de la Laguna
Instituto Astrofisico de Canarias
Spain, San Cristobal de la Laguna
Universidad de la Laguna
Viironen, Kerttu
Spain, Almeria
Centro Astronómico Hispano-alemán
Frew, David J.
Australia, Sydney
Macquarie University
Greimel, Robert
Austria, Graz
Universität Graz
Sale, Stuart E.
Chile, Valparaiso
Universidad de Valparaiso
Chile, Santiago
Pontificia Universidad Católica de Chile
Statistics
Citations: 87
Authors: 14
Affiliations: 13
Identifiers
Doi:
10.1111/j.1365-2966.2010.17523.x
ISSN:
00358711
Research Areas
Environmental