Type II-P supernovae(SNe II-P)are the most common class of core-collapse SNe in the local Universe and play critical roles in many aspects of astrophysics.Since decades ago theorists have predicted that SNe II-P may o...Type II-P supernovae(SNe II-P)are the most common class of core-collapse SNe in the local Universe and play critical roles in many aspects of astrophysics.Since decades ago theorists have predicted that SNe II-P may originate not only from single stars but also from interacting binaries.While 20 SN II-P progenitors have been directly detected on pre-explosion images,observational evidence still remains scarce for this speculated binary progenitor channel.In this work,we report the discovery of a red supergiant progenitor for the Type II-P SN 2018gj.While the progenitor resembles those of other SNe II-P in terms of effective temperature and luminosity,it is located in a very old environment,and SN 2018gj has an abnormally short plateau in the light curve.With state-of-the-art binary evolution simulations,we find these characteristics can only be explained if the progenitor of SN 2018gj is the merger product of a close binary system,which developed a different interior structure and evolved over a longer timescale compared with single-star evolution.This work provides the first compelling evidence for the long-sought binary progenitor channel toward SNe II-P,and our methodology serves as an innovative and pragmatic tool to motivate further investigations into this previously hidden population of SNe II-P from binaries.展开更多
基金supported by the Strategic Priority Research Program of the Chinese Academy of Sciences(XDB0550300)the National Natural Science Foundation of China(12303039,12303051,12261141690,and 12588202)+8 种基金Emmanouil Zapartas and Dimitris Souropanis acknowledge support from the Hellenic Foundation for Research and Innovation(H.F.R.I.)under the“3rd Call for H.F.R.I.Research Projects”to support Post-Doctoral Researchers(7933)Emmanouil Zapartas acknowledges useful discussion with Azalee Bostroem,Jared Goldberg and Natalia Ivanova.Jeff J.Andrews acknowledges support provided through a grant(JWST-AR-04369.001-A)from the STScI under NASA contract NAS5-03127Max M.Briel was supported by the Boninchi Foundation,the Swiss National Science Foundation(CRSII5_21349)the Swiss Government Excellence Scholarship.Morgan Fraser is supported by a Royal Society-Science Foundation Ireland University Research Fellowship.Matthias U.Kruckow was supported by the Swiss National Science Foundation Professorship grant(PI Fragos,PP00P2176868)Seth Gossage,Camille Liotine,Philipp M.Srivastava,and Elizabeth Teng were supported by the Gordon and Betty Moore Foundation(PI Kalogera,GBMF8477 and GBMF12341)Zhengwei Liu’s work is supported by the National Natural Science Foundation of China(12288102)the Strategic Priority Research Program of the Chinese Academy of Sciences(XDB1160303)the International Centre of Supernovae(ICESUN),Yunnan Key Laboratory of Supernova Research(202302AN360001)the Yunnan Revitalization Talent Support Program“YunLing Scholar”project.Yi Yang’s research is partially supported by the Tsinghua University Dushi Program.Jifeng Liu acknowledges support from the New Cornerstone Science Foundation through the New Cornerstone Investigator Program and the XPLORER PRIZE.
文摘Type II-P supernovae(SNe II-P)are the most common class of core-collapse SNe in the local Universe and play critical roles in many aspects of astrophysics.Since decades ago theorists have predicted that SNe II-P may originate not only from single stars but also from interacting binaries.While 20 SN II-P progenitors have been directly detected on pre-explosion images,observational evidence still remains scarce for this speculated binary progenitor channel.In this work,we report the discovery of a red supergiant progenitor for the Type II-P SN 2018gj.While the progenitor resembles those of other SNe II-P in terms of effective temperature and luminosity,it is located in a very old environment,and SN 2018gj has an abnormally short plateau in the light curve.With state-of-the-art binary evolution simulations,we find these characteristics can only be explained if the progenitor of SN 2018gj is the merger product of a close binary system,which developed a different interior structure and evolved over a longer timescale compared with single-star evolution.This work provides the first compelling evidence for the long-sought binary progenitor channel toward SNe II-P,and our methodology serves as an innovative and pragmatic tool to motivate further investigations into this previously hidden population of SNe II-P from binaries.
