2001A&A...377L...1H

Query : 2001A&A...377L...1H

2001A&A...377L...1H - Astronomy and Astrophysics, volume 377L1-4 (2001/10-1)

Discovery of a double ring in the core of η Carinae.

HONY S., DOMINIK C., WATERS L.B.F.M., ICKE V., MELLEMA G., VAN BOEKEL R., DE KOTER A., MORRIS P.M., BARLOW M., COX P. and KAEUFL H.U.

Abstract (from CDS):

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 20µm. 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.

Abstract Copyright: ∼

Journal keyword(s): circumstellar matter - stars: emission-line - stars: individual: η Car - stars: massive - infrared: stars

Simbad objects: 5

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Number of rows : 5
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 SN 1987A SN* 05 35 27.98840 -69 16 11.1134           SNIIpec 5203 2
2 * eta Car s*b 10 45 03.545808 -59 41 03.95124 6.37 7.03 6.48 6.123 4.41 LBV 2543 0
3 * gam Cru PM* 12 31 09.95961 -57 06 47.5684 5.01 3.23 1.64 -0.02 -1.44 M3.5III 291 1
4 WRAY 15-1269 PN 14 59 53.4819371136 -54 18 07.521138792 12.12 12.17 11.64 11.63   [WC11] 256 0
5 PN Hb 12 PN 23 26 14.8236376464 +58 10 54.543292356   13.51 11.49 12.44   Oe 338 0

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