Discovery of An Apparent Red, High-Velocity Type Ia Supernova at z = 2.9 with JWST

• DOI: 10.48550/arxiv.2406.05089
• Publication Date: 2024-06-07
• Authors: Justin Pierel; M. Engesser; D. A. Coulter; Christa DeCoursey; M. R. Siebert; A. Rest; Eiichi Egami; W. Chen; O. D. Fox; D. O. Jones; Bhavin Joshi; T. J. Moriya; Yossef Zenati; Andrew J. Bunker; Phillip A. Cargile; Mirko Curti; Daniel J. Eisenstein; Suvi Gezari; Sebastián Gómez; M. Guolo; Benjamin D. Johnson; Mitchell Karmen; R. Maiolino; R. Quimby; Brant Robertson; Melissa Shahbandeh; Louis-Gregory Str...; Fengzhen Sun; Q. Daniel Wang; T. Wevers
• Keywords: Type Ia supernovae; High Energy Astrophysical Phenomena (astro-ph.HE); Cosmology and Nongalactic Astrophysics (astro-ph.CO); FOS: Physical sciences; High-redshift galaxy clusters; Astrophysics; Astrophysics - Astrophysics of Galaxies; 01 natural sciences; Cosmology; QB460-466; Supernovae; 5101 Astronomical Sciences; Astrophysics of Galaxies (astro-ph.GA); 0103 physical sciences; Astrophysics - High Energy Astrophysical Phenomena; 51 Physical Sciences; Astrophysics - Cosmology and Nongalactic Astrophysics

We present the JWST discovery of SN 2023adsy, a transient object located in host galaxy JADES-GS$+53.13485$$-$$27.82088$ with spectroscopic redshift $2.903\pm0.007$. The was identified deep James Webb Space Telescope (JWST)/NIRCam imaging from Advanced Deep Extragalactic Survey (JADES) program. Photometric and followup NIRCam NIRSpec, respectively, confirm yield UV-NIR light-curve, NIR color, information all consistent Type Ia classification. Despite its classification as likely Ia, 2023adsy is both fairly red (E(B-V)$\sim0.9$) despite low-extinction has high Ca II velocity ($19,000\pm2,000$km/s) compared to general population SNe Ia. While these characteristics are some Ca-rich particularly 2016hnk, intrinsically brighter than low-z population. Although such an too for any cosmological sample, we apply fiducial standardization approach find that luminosity distance measurement excellent agreement ($\lesssim1\sigma$) $\Lambda$CDM. Therefore unlike standardizable gives no indication standardized luminosities change significantly redshift. A larger sample distant required determine if at high-z truly diverge their counterparts, nevertheless remain constant