Search for lensed supernovae behind the galaxy cluster Abell 1689
2014 (English)Licentiate thesis, comprehensive summary (Other academic)
Distant supernovae probe the history of cosmic expansion and star formation, and provide important information on their progenitor models. Investigation of supernovae type Ia for are needed to reveal any evolution in their intrinsic properties, and thus their utility as existing distance indicators. One approach to extend the redshift range beyond the reach of our telescopes is to use galaxy clusters as gravitational telescopes. Conversely, lensed supernovae can be used as probes for testing cluster lens model predictions. In this licentiate thesis, I present a 5-year ground based near-infrared search for gravitationally magnified supernovae behind the galaxy cluster A1689. Abell 1689, at z=0.187, is a one of the best-studied clusters with an extended Einstein radius, making it particularly suited as a gravitational telescope. Our search resulted in the discovery of one highly magnified supernova type II at z=1.703 and two transient objects (probably type IIP and Ia, in host galaxies at redshifts and ), which is in agreement with the survey expectations.
Place, publisher, year, edition, pages
Stockholm University: Department of Physics, Stockholm University , 2014. , 60 p.
lensed supernovae, gravitational lensing, galaxy cluster Abell 1689
Astronomy, Astrophysics and Cosmology
Research subject Astronomy; Physics
IdentifiersURN: urn:nbn:se:su:diva-109489OAI: oai:DiVA.org:su-109489DiVA: diva2:765261
2014-12-12, Albanova/Roslagstullsbacken 21, Stockholm, 13:15 (English)
Lundqvist, Peter, Professor
Amanullah, Rahman, PhDGoobar, Ariel, Professor