The Astrophysical Journal (Jan 2024)
Dramatic Rebrightening of the Type-changing Stripped-envelope Supernova SN 2023aew
- Yashvi Sharma,
- Jesper Sollerman,
- Shrinivas R. Kulkarni,
- Takashi J. Moriya,
- Steve Schulze,
- Stan Barmentloo,
- Michael Fausnaugh,
- Avishay Gal-Yam,
- Anders Jerkstrand,
- Tomás Ahumada,
- Eric C. Bellm,
- Kaustav K. Das,
- Andrew Drake,
- Christoffer Fremling,
- David Hale,
- Saarah Hall,
- K. R. Hinds,
- Theophile Jegou du Laz,
- Viraj Karambelkar,
- Mansi M. Kasliwal,
- Frank J. Masci,
- Adam A. Miller,
- Guy Nir,
- Daniel A. Perley,
- Josiah N. Purdum,
- Yu-Jing Qin,
- Nabeel Rehemtulla,
- R. Michael Rich,
- Reed L. Riddle,
- Antonio C. Rodriguez,
- Sam Rose,
- Jean Somalwar,
- Jacob L. Wise,
- Avery Wold,
- Lin Yan,
- Yuhan Yao
Affiliations
- Yashvi Sharma
- ORCiD
- Division of Physics, Mathematics and Astronomy, California Institute of Technology , Pasadena, CA 91125, USA ; [email protected]
- Jesper Sollerman
- ORCiD
- Department of Astronomy, The Oskar Klein Center, Stockholm University , AlbaNova, 10691 Stockholm, Sweden
- Shrinivas R. Kulkarni
- ORCiD
- Division of Physics, Mathematics and Astronomy, California Institute of Technology , Pasadena, CA 91125, USA ; [email protected]
- Takashi J. Moriya
- ORCiD
- National Astronomical Observatory of Japan, National Institutes of Natural Sciences , 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan; Graduate Institute for Advanced Studies , SOKENDAI, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan; School of Physics and Astronomy, Monash University , Clayton, Victoria 3800, Australia
- Steve Schulze
- ORCiD
- Center for Interdisciplinary Exploration and Research in Astrophysics (CIERA), Northwestern University , 1800 Sherman Avenue, Evanston, IL 60201, USA
- Stan Barmentloo
- ORCiD
- Department of Astronomy, The Oskar Klein Center, Stockholm University , AlbaNova, 10691 Stockholm, Sweden
- Michael Fausnaugh
- ORCiD
- Department of Physics & Astronomy, Texas Tech University , Lubbock, TX 79410-1051, USA
- Avishay Gal-Yam
- ORCiD
- Department of Particle Physics and Astrophysics, Weizmann Institute of Science , 234 Herzl Street, 76100 Rehovot, Israel
- Anders Jerkstrand
- ORCiD
- Department of Astronomy, The Oskar Klein Center, Stockholm University , AlbaNova, 10691 Stockholm, Sweden
- Tomás Ahumada
- ORCiD
- Division of Physics, Mathematics and Astronomy, California Institute of Technology , Pasadena, CA 91125, USA ; [email protected]
- Eric C. Bellm
- ORCiD
- DIRAC Institute, Department of Astronomy, University of Washington , 3910 15th Avenue NE, Seattle, WA 98195, USA
- Kaustav K. Das
- ORCiD
- Division of Physics, Mathematics and Astronomy, California Institute of Technology , Pasadena, CA 91125, USA ; [email protected]
- Andrew Drake
- Division of Physics, Mathematics and Astronomy, California Institute of Technology , Pasadena, CA 91125, USA ; [email protected]
- Christoffer Fremling
- ORCiD
- Division of Physics, Mathematics and Astronomy, California Institute of Technology , Pasadena, CA 91125, USA ; [email protected]
- David Hale
- Caltech Optical Observatories, California Institute of Technology , Pasadena, CA 91125, USA
- Saarah Hall
- ORCiD
- Center for Interdisciplinary Exploration and Research in Astrophysics (CIERA), Northwestern University , 1800 Sherman Avenue, Evanston, IL 60201, USA
- K. R. Hinds
- ORCiD
- Astrophysics Research Institute, L iverpool John Moores University , Liverpool Science Park, 146 Brownlow Hill, Liverpool L3 5RF, UK
- Theophile Jegou du Laz
- ORCiD
- Division of Physics, Mathematics and Astronomy, California Institute of Technology , Pasadena, CA 91125, USA ; [email protected]
- Viraj Karambelkar
- ORCiD
- Division of Physics, Mathematics and Astronomy, California Institute of Technology , Pasadena, CA 91125, USA ; [email protected]
- Mansi M. Kasliwal
- ORCiD
- Division of Physics, Mathematics and Astronomy, California Institute of Technology , Pasadena, CA 91125, USA ; [email protected]
- Frank J. Masci
- ORCiD
- IPAC, California Institute of Technology , 1200 E. California Boulevard, Pasadena, CA 91125, USA
- Adam A. Miller
- ORCiD
- Center for Interdisciplinary Exploration and Research in Astrophysics (CIERA), Northwestern University , 1800 Sherman Avenue, Evanston, IL 60201, USA
- Guy Nir
- ORCiD
- Department of Astronomy, University of California , Berkeley, CA 94720-3411, USA
- Daniel A. Perley
- ORCiD
- Astrophysics Research Institute, L iverpool John Moores University , Liverpool Science Park, 146 Brownlow Hill, Liverpool L3 5RF, UK
- Josiah N. Purdum
- ORCiD
- Caltech Optical Observatories, California Institute of Technology , Pasadena, CA 91125, USA
- Yu-Jing Qin
- ORCiD
- Division of Physics, Mathematics and Astronomy, California Institute of Technology , Pasadena, CA 91125, USA ; [email protected]
- Nabeel Rehemtulla
- ORCiD
- Center for Interdisciplinary Exploration and Research in Astrophysics (CIERA), Northwestern University , 1800 Sherman Avenue, Evanston, IL 60201, USA; Department of Physics and Astronomy, Northwestern University , 2145 Sheridan Road, Evanston, IL 60208, USA
- R. Michael Rich
- ORCiD
- UCLA Dept of Physics and Astronomy , PAB 430 Portola Plaza, Box 951547, Los Angeles, CA 90095-1547, USA
- Reed L. Riddle
- ORCiD
- Caltech Optical Observatories, California Institute of Technology , Pasadena, CA 91125, USA
- Antonio C. Rodriguez
- ORCiD
- Division of Physics, Mathematics and Astronomy, California Institute of Technology , Pasadena, CA 91125, USA ; [email protected]
- Sam Rose
- ORCiD
- Division of Physics, Mathematics and Astronomy, California Institute of Technology , Pasadena, CA 91125, USA ; [email protected]
- Jean Somalwar
- ORCiD
- Division of Physics, Mathematics and Astronomy, California Institute of Technology , Pasadena, CA 91125, USA ; [email protected]
- Jacob L. Wise
- ORCiD
- Astrophysics Research Institute, L iverpool John Moores University , Liverpool Science Park, 146 Brownlow Hill, Liverpool L3 5RF, UK
- Avery Wold
- ORCiD
- IPAC, California Institute of Technology , 1200 E. California Boulevard, Pasadena, CA 91125, USA
- Lin Yan
- ORCiD
- Division of Physics, Mathematics and Astronomy, California Institute of Technology , Pasadena, CA 91125, USA ; [email protected]
- Yuhan Yao
- ORCiD
- Miller Institute for Basic Research in Science , 468 Donner Lab, Berkeley, CA 94720, USA; Department of Astronomy, University of California , Berkeley, CA 94720, USA
- DOI
- https://doi.org/10.3847/1538-4357/ad3758
- Journal volume & issue
-
Vol. 966,
no. 2
p. 199
Abstract
Multipeaked supernovae with precursors, dramatic light-curve rebrightenings, and spectral transformation are rare, but are being discovered in increasing numbers by modern night-sky transient surveys like the Zwicky Transient Facility. Here, we present the observations and analysis of SN 2023aew, which showed a dramatic increase in brightness following an initial luminous (−17.4 mag) and long (∼100 days) unusual first peak (possibly precursor). SN 2023aew was classified as a Type IIb supernova during the first peak but changed its type to resemble a stripped-envelope supernova (SESN) after the marked rebrightening. We present comparisons of SN 2023aew’s spectral evolution with SESN subtypes and argue that it is similar to SNe Ibc during its main peak. P-Cygni Balmer lines are present during the first peak, but vanish during the second peak’s photospheric phase, before H α resurfaces again during the nebular phase. The nebular lines ([O i ], [Ca ii ], Mg i ], H α ) exhibit a double-peaked structure that hints toward a clumpy or nonspherical ejecta. We analyze the second peak in the light curve of SN 2023aew and find it to be broader than that of normal SESNe as well as requiring a very high ^56 Ni mass to power the peak luminosity. We discuss the possible origins of SN 2023aew including an eruption scenario where a part of the envelope is ejected during the first peak and also powers the second peak of the light curve through interaction of the SN with the circumstellar medium.
Keywords
