246 citations · 3.3k across the 64 of their papers we have counts for
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Combined constraints on intergalactic dust from quasar colours and the soft X-ray background
Joel Johansson, Edvard Mortsell
Unless properly corrected for, the existence of intergalactic dust will introduce a redshift dependent magnitude offset to standard candle sources. This would lead to overestimated…
Herschel limits on far-infrared emission from circumstellar dust around nearby Type Ia supernovae
Joel Johansson, Rahman Amanullah, Ariel Goobar
We report upper limits on dust emission at far-infrared (IR) wavelengths from three nearby Type Ia supernovae: SNe 2011by, 2011fe and 2012cg. Observations were carried out at 70 um…
Hunting for dark halo substructure using submilliarcsecond-scale observations of macrolensed radio jets
Erik Zackrisson, Saghar Asadi, Kaj Wiik +8
Dark halo substructure may reveal itself through secondary, small-scale gravitational lensing effects on light sources that are macrolensed by a foreground galaxy. Here, we explore…