FNWI --- IMAPP Department of Astrophysics
Radboud University > Faculty of Science > Department of Astrophysics


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news:the_hydrogen-poor_superluminous_supernova_iptf13ajg_and_its_host_galaxy_in_absorption [2014/12/08 16:15] (current)
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 +**Dr. Paul Vreeswijk**
 +**The hydrogen-poor superluminous supernova iPTF13ajg and its host galaxy in absorption**
 +After an introduction to superluminous supernovae (SLSNe), we present imaging and spectroscopy of a hydrogen-poor SLSN discovered by the intermediate Palomar Transient Factory: iPTF13ajg. At a redshift of z=0.74, iPTF13ajg peaked at an absolute magnitude Mu(AB)=-22.5,​ one of the most luminous supernovae to date. We detect narrow absorption lines of Mg I, Mg II, and Fe II, associated with the cold interstellar medium in the host galaxy, at two different epochs with X-shooter at the VLT. The column densities of these lines, as well as the Mg I and Mg II equivalent widths of a sample of hydrogen-poor SLSNe taken from the literature, are at the low end of those derived for gamma-ray bursts (GRBs), whose progenitors are also thought to be massive stars. This suggests that the environments of SLSNe and GRBs are different. From the nondetection of Fe II fine-structure absorption lines, we derive a strict lower limit on the distance between the supernova and the narrow-line absorbing gas of 50 pc.