Identifying the SN 2022acko progenitor with JWST

Author:

Van Dyk Schuyler D1ORCID,Bostroem K Azalee2ORCID,Zheng WeiKang3ORCID,Brink Thomas G3ORCID,Fox Ori D4ORCID,Andrews Jennifer E5ORCID,Filippenko Alexei V3ORCID,Dong Yize6ORCID,Hoang Emily6ORCID,Hosseinzadeh Griffin2ORCID,Janzen Daryl7ORCID,Jencson Jacob E8ORCID,Lundquist Michael J9ORCID,Meza Nicolas6ORCID,Milisavljevic Dan1011ORCID,Pearson Jeniveve2ORCID,Sand David J2ORCID,Shrestha Manisha2ORCID,Valenti Stefano6ORCID,Howell D Andrew1213ORCID

Affiliation:

1. Caltech/IPAC , Mailcode 100-22, Pasadena, CA 91125 , USA

2. Steward Observatory, University of Arizona , 933 North Cherry Avenue, Tucson, AZ 85721 , USA

3. Department of Astronomy, University of California , Berkeley, CA 94720-3411 , USA

4. Space Telescope Science Institute , 3700 San Martin Drive, Baltimore, MD 21218 , USA

5. Gemini Observatory/NSF’s NOIRLab , 670 N. A’ohoku Place, Hilo, HI 96720 , USA

6. Department of Physics and Astronomy, University of California , Davis, 1 Shields Avenue, Davis, CA 95616-5270 , USA

7. Department of Physics & Engineering Physics, University of Saskatchewan , 116 Science Pl, Saskatoon, SK S7N 5E2 , Canada

8. Department of Physics and Astronomy, The Johns Hopkins University , Baltimore, MD 21218 , USA

9. W. M. Keck Observatory , 65-1120 Mamalahoa Highway, Kamuela, HI 96743 , USA

10. Department of Physics and Astronomy, Purdue University , 525 Northwestern Avenue, West Lafayette, IN 47907 , USA

11. Integrative Data Science Initiative, Purdue University , West Lafayette, IN 47907 , USA

12. Las Cumbres Observatory , 6740 Cortona Dr Suite 102, Goleta, CA 93117 , USA

13. Physics Department, University of California, Santa Barbara , Santa Barbara, CA 93111 , USA

Abstract

ABSTRACT We report on analysis using the JWST to identify a candidate progenitor star of the Type II-plateau (II-P) supernova SN 2022acko in the nearby, barred spiral galaxy NGC 1300. To our knowledge, our discovery represents the first time JWST has been used to localize a progenitor system in pre-explosion archival Hubble Space Telescope (HST) images. We astrometrically registered a JWST NIRCam image from 2023 January, in which the SN was serendipitously captured, to pre-SN HST F160W and F814W images from 2017 and 2004, respectively. An object corresponding precisely to the SN position has been isolated with reasonable confidence. That object has a spectral energy distribution (SED) and overall luminosity consistent with a single-star model having an initial mass possibly somewhat less than the canonical 8 M⊙ theoretical threshold for core collapse (although masses as high as 9 M⊙ for the star are also possible); however, the star’s SED and luminosity are inconsistent with that of a super-asymptotic giant branch star that might be a forerunner of an electron-capture SN. The properties of the progenitor alone imply that SN 2022acko is a relatively normal SN II-P, albeit most likely a low-luminosity one. The progenitor candidate should be confirmed with follow-up HST imaging at late times, when the SN has sufficiently faded. This potential use of JWST opens a new era of identifying SN progenitor candidates at high spatial resolution.

Funder

NASA

John Templeton Foundation

National Science Foundation

Heising-Simons Foundation

STScI

Publisher

Oxford University Press (OUP)

Subject

Space and Planetary Science,Astronomy and Astrophysics

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