학술논문
Identifying the SN 2022acko progenitor with JWST.
Document Type
Article
Author
Van Dyk, Schuyler D; Bostroem, K Azalee; Zheng, WeiKang; Brink, Thomas G; Fox, Ori D; Andrews, Jennifer E; Filippenko, Alexei V; Dong, Yize; Hoang, Emily; Hosseinzadeh, Griffin; Janzen, Daryl; Jencson, Jacob E; Lundquist, Michael J; Meza, Nicolas; Milisavljevic, Dan; Pearson, Jeniveve; Sand, David J; Shrestha, Manisha; Valenti, Stefano; Howell, D Andrew
Source
Subject
*SPECTRAL energy distribution
*GIANT stars
*SPACE telescopes
*ASYMPTOTIC giant branch stars
*SPIRAL galaxies
*SPATIAL resolution
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Language
ISSN
0035-8711
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 F 160 W and F 814 W 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. [ABSTRACT FROM AUTHOR]