期刊
NATURE
卷 601, 期 7892, 页码 201-+出版社
NATURE PORTFOLIO
DOI: 10.1038/s41586-021-04155-1
关键词
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资金
- US National Science Foundation (NSF) [AST-1440341]
- Caltech
- IPAC
- Weizmann Institute for Science
- Oskar Klein Center at Stockholm University
- University of Maryland
- University of Washington
- Deutsches Elektronen-Synchrotron
- Humboldt University
- Los Alamos National Laboratories
- TANGO Consortium of Taiwan
- University of Wisconsin at Milwaukee
- Lawrence Berkeley National Laboratories
- UK Science and Technology Facilities Council
- European Union [730890]
- EU via ERC [725161]
- ISF GW excellence centre
- IMOS space infrastructure grant
- BSF/Transformative
- GIF grants
- Benoziyo Endowment Fund for the Advancement of Science
- Deloro Institute for Advanced Research in Space and Optics
- The Veronika A. Rabl Physics Discretionary Fund
- Minerva
- Schwartz/Reisman Collaborative Science Program
- David and Lucile Packard Foundation
- NSF [AST-1813825, AST-1545949]
- G.R.E.A.T. research environment - Vetenskapsradet, the Swedish Research Council [2016-06012]
- The Wenner-Gren Foundations
- VILLUM FONDEN [19054]
- TABASGo Foundation
- Christopher R. Redlich Fund
- Miller Institute for Basic Research in Science
- W. M. Keck Foundation
- Yeda-Sela
The final fate of massive stars and the compact remnants they leave behind are still unanswered questions in astrophysics. Observations of SN 2019hgp suggest that it is an explosion from a massive WC/WO star within a nebula composed of carbon, oxygen, and neon, indicating that massive Wolf-Rayet stars may be the progenitors of some rapidly evolving transients.
The final fate of massive stars, and the nature of the compact remnants they leave behind (black holes and neutron stars), are open questions in astrophysics. Many massive stars are stripped of their outer hydrogen envelopes as they evolve. Such Wolf-Rayet stars(1) emit strong and rapidly expanding winds with speeds greater than 1,000 kilometres per second. A fraction of this population is also helium-depleted, with spectra dominated by highly ionized emission lines of carbon and oxygen (types WC/WO). Evidence indicates that the most commonly observed supernova explosions that lack hydrogen and helium (types Ib/Ic) cannot result from massive WC/WO stars(2,3), leading some to suggest that most such stars collapse directly into black holes without a visible supernova explosion(4). Here we report observations of SN 2019hgp, beginning about a day after the explosion. Its short rise time and rapid decline place it among an emerging population of rapidly evolving transients(5-8). Spectroscopy reveals a rich set of emission lines indicating that the explosion occurred within a nebula composed of carbon, oxygen and neon. Narrow absorption features show that this material is expanding at high velocities (greater than 1,500 kilometres per second), requiring a compact progenitor. Our observations are consistent with an explosion of a massive WC/WO star, and suggest that massive Wolf-Rayet stars may be the progenitors of some rapidly evolving transients.
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