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Radioactivities and nucleosynthesis in SN 1987A
Claes Fransson, Cecilia Kozma
The nucleosynthesis and production of radioactive elements in SN 1987A are reviewed. Different methods for estimating the masses of 56Ni, 57Ni, and 44Ti are discussed, and we concl…
The Galaxy Population of Cl1601+42 at z=0.54
Tomas Dahlen, Claes Fransson, Magnus Naeslund
Photometric redshifts are used to determine the rest frame luminosity function (LF) of both early-type and late-type galaxies to M_B ~ -17.6 for the cluster Cl1601+42 at z = 0.54.…
Supernova Interaction with a Circumstellar Medium
Roger A. Chevalier, Claes Fransson
The explosion of a core collapse supernova drives a powerful shock front into the wind from the progenitor star. A layer of shocked circumstellar gas and ejecta develops that is su…
Optical and Ultraviolet Spectroscopy of SN 1995N: Evidence for Strong Circumstellar Interaction
Claes Fransson, Roger A. Chevalier, Alexei V. Filippenko +9
Optical and ultraviolet observations of the Type IIn supernova 1995N at epochs between 321 and 1799 days after the explosion show three distinct velocity components. The narrow lin…
The Nature of the Compact Supernova Remnants in Starburst Galaxies
Roger A. Chevalier, Claes Fransson
Radio observations of starburst regions in galaxies have revealed groups of compact nonthermal sources that may be radiative supernova remnants expanding in the interclump medium o…
ISO/SWS observations of SN 1987A: II. A refined upper limit on the mass of Ti-44 in the ejecta of SN 1987A
P. Lundqvist, C. Kozma, J. Sollerman +1
ISO/SWS observations of SN 1987A on day 3425 show no emission in [Fe I] 24.05 microns and [Fe II] 25.99 microns down to the limits of roughly 0.39 Jy and 0.64 Jy, respectively. Ass…