HOLISMOKES: I. Highly Optimised Lensing Investigations of Supernovae, Microlensing Objects, and Kinematics of Ellipticals and Spirals

Suyu, S. H.Huber, S.Canameras, R.Kromer, M.Schuldt, S.Taubenberger, S.Yildirim, A.Bonvin, V.Chan, J. H. H.Courbin, F.Noebauer, U.Sim, S. A.Sluse, D.2021-06-192021-06-192021-06-192020-12-1510.1051/0004-6361/202037757https://infoscience.epfl.ch/handle/20.500.14299/179267WOS:000599769100007We present the HOLISMOKES programme on strong gravitational lensing of supernovae (SNe) as a probe of SN physics and cosmology. We investigate the effects of microlensing on early-phase SN Ia spectra using four different SN explosion models. We find that distortions of SN Ia spectra due to microlensing are typically negligible within ten rest-frame days after a SN explosion (< 1% distortion within the 1 sigma spread and less than or similar to 10% distortion within the 2 sigma spread). This shows the great prospects of using lensed SNe Ia to obtain intrinsic early-phase SN spectra for deciphering SN Ia progenitors. As a demonstration of the usefulness of lensed SNe Ia for cosmology, we simulate a sample of mock lensed SN Ia systems that are expected to have accurate and precise time-delay measurements in the era of the Rubin Observatory Legacy Survey of Space and Time (LSST). Adopting realistic yet conservative uncertainties on their time-delay distances and lens angular diameter distances, of 6.6% and 5%, respectively, we find that a sample of 20 lensed SNe Ia would allow us to constrain the Hubble constant (H-0) with 1.3% uncertainty in the flat Lambda CDM cosmology. We find a similar constraint on H-0 in an open Lambda CDM cosmology, while the constraint degrades to 3% in a flat wCDM cosmology. We anticipate lensed SNe to be an independent and powerful probe of SN physics and cosmology in the upcoming LSST era.Astronomy & Astrophysicsgravitational lensing: stronggravitational lensing: microsupernovae: generalgalaxies: distances and redshiftsgalaxies: kinematics and dynamicscosmological parameters2-dimensional kinematicsslacs lenseshubble constanttime delaysmassgalaxiesmodelsfieldh-0explosionHOLISMOKES: I. Highly Optimised Lensing Investigations of Supernovae, Microlensing Objects, and Kinematics of Ellipticals and Spiralstext::journal::journal article::research article