0 Assigned ID: 4214 ----- Attempting Submission 1 (Wed May 24 00:41:35 GMT 2023) ----- HST Phase I Proposal 4214 successfully submitted. Receipt: # 4214-1 ----- Attempting Submission 2 (Wed May 24 20:07:38 GMT 2023) ----- HST Phase I Proposal 4214 successfully submitted. Receipt: # 4214-2 ----- Attempting Submission 3 (Wed May 24 20:23:37 GMT 2023) ----- HST Phase I Proposal 4214 successfully submitted. Receipt: # 4214-3 Your proposal could not be saved. Submission aborted. ----- Attempting Submission 4 (Wed May 24 21:53:28 GMT 2023) ----- HST Phase I Proposal 4214 successfully submitted. Receipt: # 4214-4 ----- Attempting Submission 5 (Wed May 24 23:32:42 GMT 2023) ----- HST Phase I Proposal 4214 successfully submitted. Receipt: # 4214-5 ----- Attempting Submission 6 (Wed May 24 23:39:41 GMT 2023) ----- Observations of galaxies show that the volumetric comic star-formation rate peaks at cosmic noon (redshift z~1-2). Since progenitors of core-collapse supernovae (CCSNe) are short-lived massive stars, the CCSN rate yield an independent measurement of the rate at which new massive stars (>8 solar masses) are formed. Hence, discoveries of CCSNe at z=1-2 provide an avenue to study star-formation history and the initial mass function at cosmic noon. The most extensive and reference analysis of the core-collapse SN rate at above z=1 was performed as part of the CLASH and CANDELS survey programs. The inferred CCSN rate was in tension with the expectation given the Madau & Dickinson (2014) star-formation history and a Milky Way upper-end initial mass function. However, the dust prior used in the CANDELS + CLASH SN analysis was not consistent with low-redshift measurements. Here we propose to reanalyze the archival CLASH + CANDELS programs to determine whether a dust prior consistent with observations of low-redshift SNe can resolve the apparent tension, or if evidence remains for an initial mass function at z=1-2 that is different from that of the Milky Way. Dr. Wenlei Chen has experience on HST and JWST data analysis and gravitational-lensing modeling, and discovered the multiply imaged supernova at z~3 in Abell 370. Dr. Patrick Kelly has extensive experience with HST imaging programs, who discovered the SN Refsdal at z=1.49 in MACS J1149.6+2223. Ms. Hayley has experience with observations and data analysis of HST and JWST imaging. Galaxies Large Scale Structure of the Universe 0 Regular false false false false false false SUPPORTED