Discovery of an Apparent Red, High-velocity Type Ia Supernova at z = 2.9 with JWST
Abstract We present the James Webb Space Telescope (JWST) discovery of SN 2023adsy, a transient object located in a host galaxy JADES-GS+53.13485−27.82088 with a host spectroscopic redshift of 2.903 ± 0.007. The transient was identified in deep (JWST)/NIRCam imaging from the JWST Advanced Deep Extragalactic Survey (JADES) program. Photometric and spectroscopic follow-up with NIRCam and NIRSpec, respectively, confirm the redshift and yield UV-NIR light-curve, NIR color, and spectroscopic information all consistent with a Type Ia classification. Despite its classification as a likely SN Ia, SN 2023adsy is both fairly red ( c ∼ 0.9) despite a host galaxy with low extinction and has a high Ca ii velocity (19,000 ± 2000 km s −1 ) compared to the general population of SNe Ia. While these characteristics are consistent with some Ca-rich SNe Ia, particularly SN 2016hnk, SN 2023adsy is intrinsically brighter than the low- z Ca-rich population. Although such an object is too red for any low- z cosmological sample, we apply a fiducial standardization approach to SN 2023adsy and find that the SN 2023adsy luminosity distance measurement is in excellent agreement (≲1 σ ) with ΛCDM. Therefore unlike low- z Ca-rich SNe Ia, SN 2023adsy is standardizable and gives no indication that SN Ia standardized luminosities change significantly with redshift. A larger sample of distant SNe Ia is required to determine if SN Ia population characteristics at high z truly diverge from their low- z counterparts and to confirm that standardized luminosities nevertheless remain constant with redshift.
Authors
- Qinan Wang (ORCID: https://orcid.org/0000-0001-5233-6989)
- D. O. Jones (ORCID: https://orcid.org/0000-0002-6230-0151)
- T. Wevers (ORCID: https://orcid.org/0000-0002-4043-9400)
- Eiichi Egami (ORCID: https://orcid.org/0000-0003-1344-9475)
- Bhavin Joshi (ORCID: https://orcid.org/0000-0002-7593-8584)
- Muryel Guolo (ORCID: https://orcid.org/0000-0002-5063-0751)
- Mitchell Karmen (ORCID: https://orcid.org/0000-0003-2495-8670)
- Fengwu Sun (ORCID: https://orcid.org/0000-0002-4622-6617)
- R. Maiolino (ORCID: https://orcid.org/0000-0002-4985-3819)
- Benjamin D. Johnson (ORCID: https://orcid.org/0000-0002-9280-7594)
- Takashi J. Moriya (ORCID: https://orcid.org/0000-0003-1169-1954)
- A. Rest (ORCID: https://orcid.org/0000-0002-4410-5387)
- Matthew R. Siebert (ORCID: https://orcid.org/0000-0003-2445-3891)
- Michael Engesser (ORCID: https://orcid.org/0000-0003-0209-674X)
- Louis-Gregory Strolger (ORCID: https://orcid.org/0000-0002-7756-4440)
- Mirko Curti (ORCID: https://orcid.org/0000-0002-2678-2560)
- Yossef Zenati (ORCID: https://orcid.org/0000-0002-0632-8897)
- R. Quimby (ORCID: https://orcid.org/0000-0001-9171-5236)
- Ori D. Fox (ORCID: https://orcid.org/0000-0003-2238-1572)
- Christa DeCoursey (ORCID: https://orcid.org/0000-0002-4781-9078)
- Daniel J. Eisenstein (ORCID: https://orcid.org/0000-0002-2929-3121)
- D. A. Coulter (ORCID: https://orcid.org/0000-0003-4263-2228)
- Andrew J. Bunker (ORCID: https://orcid.org/0000-0002-8651-9879)
- Phillip A. Cargile (ORCID: https://orcid.org/0000-0002-1617-8917)
- Melissa Shahbandeh (ORCID: https://orcid.org/0000-0002-9301-5302)
- Brant E. Robertson (ORCID: https://orcid.org/0000-0002-4271-0364)
- Sebastián Gómez (ORCID: https://orcid.org/0000-0001-6395-6702)
- Suvi Gezari (ORCID: https://orcid.org/0000-0003-3703-5154)
- Justin D. R. Pierel (ORCID: https://orcid.org/0000-0002-2361-7201)
- Wenlei Chen (ORCID: https://orcid.org/0000-0003-1060-0723)
Publication Details
- Journal
- The Astrophysical Journal Letters
- Published
- 2024-08-01
- DOI
- https://doi.org/10.3847/2041-8213/ad6908
- Citations
- 16
- Primary Topic
- Gamma-ray bursts and supernovae
- Type
- article
- Field-Weighted Citation Impact
- 5.30
Funders
- National Aeronautics and Space Administration
- UK Research and Innovation
- Science and Technology Facilities Council