Pierel, JDR, Frye, BL, Pascale, M, Caminha, GB, Chen, W, Dhawan, S, Gilman, D, Grayling, M, Huber, S, Kelly, P, Thorp, S, Arendse, N, Birrer, S, Bronikowski, M, Cañameras, R, Coe, D, Cohen, SH, Conselice, CJ, Driver, SP, DŚilva, JCJ et al, Engesser, M, Foo, N, Gall, C, Garuda, N, Grillo, C, Grogin, NA, Henderson, J, Hjorth, J, Jansen, RA, Johansson, J, Kamieneski, PS, Koekemoer, AM, Larison, C, Marshall, MA, Moustakas, LA, Nonino, M, Ortiz, R, Petrushevska, T, Pirzkal, N, Robotham, A, Ryan, RE, Schuldt, S, Strolger, LG, Summers, J, Suyu, SH, Treu, T, Willmer, CNA, Windhorst, RA, Yan, H, Zitrin, A, Acebron, A, Chakrabarti, S, Coulter, DA, Fox, OD, Huang, X, Jha, SW, Li, G, Mazzali, PA, Meena, AK, Pérez-Fournon, I, Poidevin, F, Rest, A and Riess, AG (2024) JWST Photometric Time-delay and Magnification Measurements for the Triply Imaged Type Ia “SN H0pe” at z = 1.78. Astrophysical Journal, 967 (1). ISSN 0004-637X

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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 = − 116.6 − 9.3 + 10.8 observer-frame days and Δt cb = − 48.6 − 4.0 + 3.6 observer-frame days relative to the last image to arrive (image 2b; all uncertainties are 1σ), which corresponds to a ∼5.6% uncertainty contribution for H 0 assuming 70 km s−1 Mpc−1. We also constrain the absolute magnification of each image to μ a = 4.3 − 1.8 + 1.6 , μ b = 7.6 − 2.6 + 3.6 , μ c = 6.4 − 1.5 + 1.6 by comparing the observed peak near-IR magnitude of SN H0pe to the nonlensed population of SNe Ia.

Item Type:	Article
Uncontrolled Keywords:	0201 Astronomical and Space Sciences; 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics; 0306 Physical Chemistry (incl. Structural); Astronomy & Astrophysics
Subjects:	Q Science > QB Astronomy Q Science > QC Physics
Divisions:	Astrophysics Research Institute
Publisher:	American Astronomical Society
SWORD Depositor:	A Symplectic
Date Deposited:	03 Oct 2024 14:04
Last Modified:	03 Oct 2024 14:15
DOI or ID number:	10.3847/1538-4357/ad3c43
URI:	https://researchonline.ljmu.ac.uk/id/eprint/24396

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