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Discovery of a double ring in the core of η Carinae

Hony, S; Dominik, C; Waters, LBFM; Icke, V; Mellema, G; van Boekel, R; de Koter, A; ... Kaufl, HU; + view all (2001) Discovery of a double ring in the core of η Carinae. Astronomy & Astrophysics , 377 (1) L1-L4. 10.1051/0004-6361:20011168. Green open access

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Abstract

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.

Type: Article
Title: Discovery of a double ring in the core of η Carinae
Open access status: An open access version is available from UCL Discovery
DOI: 10.1051/0004-6361:20011168
Publisher version: https://doi.org/10.1051/0004-6361:20011168
Language: English
Additional information: This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: circumstellar matter / stars: emission-line, Be / stars: individual: η Car / infrared: stars
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy
URI: https://discovery.ucl.ac.uk/id/eprint/10096044
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