JWST Photometric Time-delay and Magnification Measurements for the Triply Imaged Type Ia "SN H0pe" at z = 1.78
Abstract
Supernova (SN) SN H0pe is a gravitationally lensed, triply imaged, Type Ia SN (SN Ia) discovered in James Webb Space Telescope imaging of the PLCK G165.7+67.0 cluster of galaxies. Well-observed multiply imaged SNe provide a rare opportunity to constrain the Hubble constant (H 0), by measuring the relative time delay between the images and modeling the foreground mass distribution. SN H0pe is located at z = 1.783 and is the first SN Ia with sufficient light-curve sampling and long enough time delays for an H 0 inference. Here we present photometric time-delay measurements and SN properties of SN H0pe. Using JWST/NIRCam photometry, we measure time delays of Δt ab =
- Publication:
-
The Astrophysical Journal
- Pub Date:
- May 2024
- DOI:
- 10.3847/1538-4357/ad3c43
- arXiv:
- arXiv:2403.18954
- Bibcode:
- 2024ApJ...967...50P
- Keywords:
-
- Cosmology;
- Type Ia supernovae;
- Gravitational lensing;
- Galaxy clusters;
- 343;
- 1728;
- 670;
- 584;
- Astrophysics - Cosmology and Nongalactic Astrophysics
- E-Print:
- Accepted in ApJ