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

MPS-Authors
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Suyu,  S. H.
Physical Cosmology, MPI for Astrophysics, Max Planck Society;

/persons/resource/persons230607

Huber,  S.
Physical Cosmology, MPI for Astrophysics, Max Planck Society;

/persons/resource/persons256736

Canameras,  R.
Physical Cosmology, MPI for Astrophysics, Max Planck Society;

/persons/resource/persons230163

Schuldt,  S.
Physical Cosmology, MPI for Astrophysics, Max Planck Society;

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Taubenberger,  S.
Stellar Astrophysics, MPI for Astrophysics, Max Planck Society;

/persons/resource/persons204047

Yildirim,  A.
Physical Cosmology, MPI for Astrophysics, Max Planck Society;

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Citation

Suyu, S. H., Huber, S., Canameras, R., Kromer, M., Schuldt, S., Taubenberger, S., et al. (2020). HOLISMOKES: I. Highly Optimised Lensing Investigations of Supernovae, Microlensing Objects, and Kinematics of Ellipticals and Spirals. Astronomy and Astrophysics, 644: A162. doi:10.1051/0004-6361/202037757.


Cite as: http://hdl.handle.net/21.11116/0000-0007-E968-E
Abstract
We 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 1σ spread and ≲10% distortion within the 2σ 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 (H0) with 1.3% uncertainty in the flat ΛCDM cosmology. We find a similar constraint on H0 in an open ΛCDM 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.