Abstract
The early evolution of a supernova (SN) can reveal information about the environment and the progenitor star. When a star explodes in vacuum, the first photons to escape from its surface appear as a brief, hours-long shock-breakout flare1,2, followed by a cooling phase of emission. However, for stars exploding within a distribution of dense, optically thick circumstellar material (CSM), the first photons escape from the material beyond the stellar edge and the duration of the initial flare can extend to several days, during which the escaping emission indicates photospheric heating3. Early serendipitous observations2,4 that lacked ultraviolet (UV) data were unable to determine whether the early emission is heating or cooling and hence the nature of the early explosion event. Here we report UV spectra of the nearby SN 2023ixf in the galaxy Messier 101 (M101). Using the UV data as well as a comprehensive set of further multiwavelength observations, we temporally resolve the emergence of the explosion shock from a thick medium heated by the SN emission. We derive a reliable bolometric light curve that indicates that the shock breaks out from a dense layer with a radius substantially larger than typical supergiants.
| Original language | English |
|---|---|
| Pages (from-to) | 759-762 |
| Number of pages | 4 |
| Journal | Nature |
| Volume | 627 |
| Issue number | 8005 |
| DOIs | |
| State | Published - 28 Mar 2024 |
Funding
| Funders | Funder number |
|---|---|
| Stockholms Universitet | |
| University of Wisconsin-Milwaukee | |
| TNG | |
| University of California Observatories | |
| National Aeronautics and Space Administration | |
| Italian Telescopio Nazionale Galileo | |
| Fundación Galileo Galilei of the Istituto Nazionale di Astrofisica | |
| NOT | |
| W. M. Keck Foundation | |
| Turun Yliopisto | |
| Christopher R. Redlich Fund | |
| Ministerio de Ciencia e Innovación | |
| Aarhus Universitet | |
| Instituto de Astrofísica de Canarias | |
| Københavns Universitet | |
| National Energy Research Scientific Computing Center | |
| University of Warwick | |
| Consejo Nacional de Ciencia y Tecnología | |
| Instituto de Astrofísica de Andalucía | |
| California Institute of Technology | |
| Commissariat à l'Énergie Atomique et aux Énergies Alternatives | |
| Heising-Simons Foundation | |
| Trinity College Dublin | |
| U.S. Department of Energy | |
| Weizmann Institute of Science | |
| Lawrence Berkeley National Laboratory | |
| Universitetet i Oslo | |
| Háskóli Íslands | |
| University of California | |
| IPAC | |
| Science and Technology Facilities Council of the United Kingdom | |
| Liverpool John Moores University | |
| Office of Science | |
| Istituto Nazionale di Astrofisica | |
| Ruhr-Universität Bochum | |
| University of Maryland, Deutsches Elektronen-Synchrotron and Humboldt University | |
| Gordon and Betty Moore Foundation | |
| Division of Astronomical Sciences | AST-0950945 |
| Lawrence Livermore National Laboratory | IN2P3 |
| Comunidad de Madrid | 2022-T1/TIC-24117 |
| National Science Foundation | 2034437 |
| Northwestern University | 1106171 |
| High Energy Physics | DE–AC02–05CH11231 |
| Horizon 2020 Framework Programme | 101004719 |
| Science and Technology Facilities Council | ST/V00087X/1 |
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