Karina Kjaer

High resolution spectroscopy of the line emission from the inner circumstellar ring of SN 1987A and its hot spots (2007)

Groeningsson, Per, Fransson, Claes, Lundqvist, Peter, Lundqvist, Natalia, Leibundgut, Bruno, Spyromilio, Jason, ...

We discuss high resolution VLT/UVES observations (FWHM ~ 6 km/s) from October 2002 (day ~5700 past explosion) of the shock interaction of SN 1987A and its circumstellar ring. A nebular analysis of...

Infrared Integral Field Spectroscopy of SN 1987A (2007)

Kjaer, Karina, Leibundgut, Bruno, Fransson, Claes, Groeningsson, Per, Spyromilio, Jason, Kissler-Patig, Markus

SN 1987A in the Large Magellanic Cloud is close enough for a study of the very late time evolution of a supernova and its transition to a supernova remnant. Nearly two decades after explosion we are...

SN 1987A at the end of its second decade (2006)

Kjaer, Karina, Groeningsson, Per, Kotak, Rubina, Fransson, Claes, Leibundgut, Bruno

After nearly two decades at least five emission mechanisms can be found in SN 1987A. The ejecta continue to glow as a result of the radioactive decay of long-lived nuclei (mostly 44Ti), but is fading...