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Discovery of a double ring in the core of η Carinae

Hony, S. and Dominik, C. and Waters, L. B. F. M. and Icke, V. and Mellema, G. and van Boekel, R. and de Koter, A. and Morris, P. M. and Barlow, M. and Cox, P. and Käufl, H. U. (2001) Discovery of a double ring in the core of η Carinae. Astronomy & Astrophysics, 377 (1). L1-L4. ISSN 0004-6361. doi:10.1051/0004-6361:20011168.

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We report the discovery of a double ring structure in the waist of the nebula surrounding η Carinae. The rings are detected in the mid-IR dust continuum at wavelengths of 7.9, 11.9, 12.9 and 20 μm. The dust in the rings has a temperature of about 300 K. The orientation of the rings is inclined with respect to the axis of the homunculus by either 37 or 58 degrees. The central star is not in the projected centre of the structure defined by the two rings. This geometry is reminiscent of that seen in SN1987A and some planetary nebulae. We discuss several possible origins for this remarkable geometry and its orientation.

Item Type:Article
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Cox, P.0000-0003-2027-8221
Additional Information:© 2001 ESO. Received: 14 May 2001. Accepted: 21 August 2000. We thank N. Ageorges for the excellent help with data-acquisition. VI thanks A. van Genderen for discussions. This work was supported by a NWO Pionier grant to LBFMW and a NWO Spinoza grant to E. P. J. van den Heuvel.
Group:Infrared Processing and Analysis Center (IPAC)
Funding AgencyGrant Number
Nederlandse Organisatie voor Wetenschappelijk Onderzoek (NWO)UNSPECIFIED
Subject Keywords:circumstellar matter - stars: emission-line, Be - stars: individual: η Car - infrared: stars
Issue or Number:1
Record Number:CaltechAUTHORS:20180307-083229072
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Official Citation:Discovery of a double ring in the core of η Carinae S. Hony, C. Dominik, L. B. F. M. Waters, V. Icke, G. Mellema, R. van Boekel, A. de Koter, P. M. Morris, M. Barlow, P. Cox and H. U. Käufl A&A, 377 1 (2001) L1-L4 DOI:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:85165
Deposited By: Ruth Sustaita
Deposited On:07 Mar 2018 17:25
Last Modified:15 Nov 2021 20:26

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