The Astrophysical Journal (Jan 2024)
SN 2022joj: A Potential Double Detonation with a Thin Helium Shell
- E. Padilla Gonzalez,
- D. A. Howell,
- G. Terreran,
- C. McCully,
- M. Newsome,
- J. Burke,
- J. Farah,
- C. Pellegrino,
- K. A. Bostroem,
- G. Hosseinzadeh,
- J. Pearson,
- D. J. Sand,
- M. Shrestha,
- N. Smith,
- Y. Dong,
- N. Meza Retamal,
- S. Valenti,
- S. Boos,
- K. J. Shen,
- D. Townsley,
- L. Galbany,
- L. Piscarreta,
- R. J. Foley,
- M. J. Bustamante-Rosell,
- D. A. Coulter,
- R. Chornock,
- K. W. Davis,
- C. B. Dickinson,
- D. O. Jones,
- J. Kutcka,
- X. K. Le Saux,
- C. R. Rojas-Bravo,
- K. Taggart,
- S. Tinyanont,
- G. Yang,
- S. W. Jha,
- R. Margutti
Affiliations
- E. Padilla Gonzalez
- ORCiD
- Department of Physics, University of California , Santa Barbara, CA 93106-9530, USA ; [email protected]; Las Cumbres Observatory , 6740 Cortona Drive, Suite 102, Goleta, CA 93117-5575, USA
- D. A. Howell
- ORCiD
- Department of Physics, University of California , Santa Barbara, CA 93106-9530, USA ; [email protected]; Las Cumbres Observatory , 6740 Cortona Drive, Suite 102, Goleta, CA 93117-5575, USA
- G. Terreran
- ORCiD
- Las Cumbres Observatory , 6740 Cortona Drive, Suite 102, Goleta, CA 93117-5575, USA
- C. McCully
- ORCiD
- Department of Physics, University of California , Santa Barbara, CA 93106-9530, USA ; [email protected]; Las Cumbres Observatory , 6740 Cortona Drive, Suite 102, Goleta, CA 93117-5575, USA
- M. Newsome
- ORCiD
- Department of Physics, University of California , Santa Barbara, CA 93106-9530, USA ; [email protected]; Las Cumbres Observatory , 6740 Cortona Drive, Suite 102, Goleta, CA 93117-5575, USA
- J. Burke
- ORCiD
- Department of Physics, University of California , Santa Barbara, CA 93106-9530, USA ; [email protected]; Las Cumbres Observatory , 6740 Cortona Drive, Suite 102, Goleta, CA 93117-5575, USA
- J. Farah
- ORCiD
- Department of Physics, University of California , Santa Barbara, CA 93106-9530, USA ; [email protected]; Las Cumbres Observatory , 6740 Cortona Drive, Suite 102, Goleta, CA 93117-5575, USA
- C. Pellegrino
- ORCiD
- Department of Physics, University of California , Santa Barbara, CA 93106-9530, USA ; [email protected]; Las Cumbres Observatory , 6740 Cortona Drive, Suite 102, Goleta, CA 93117-5575, USA
- K. A. Bostroem
- ORCiD
- Steward Observatory, University of Arizona , 933 North Cherry Avenue, Tucson, AZ 85721-0065, USA
- G. Hosseinzadeh
- ORCiD
- Steward Observatory, University of Arizona , 933 North Cherry Avenue, Tucson, AZ 85721-0065, USA
- J. Pearson
- ORCiD
- Steward Observatory, University of Arizona , 933 North Cherry Avenue, Tucson, AZ 85721-0065, USA
- D. J. Sand
- ORCiD
- Steward Observatory, University of Arizona , 933 North Cherry Avenue, Tucson, AZ 85721-0065, USA
- M. Shrestha
- ORCiD
- Steward Observatory, University of Arizona , 933 North Cherry Avenue, Tucson, AZ 85721-0065, USA
- N. Smith
- ORCiD
- Steward Observatory, University of Arizona , 933 North Cherry Avenue, Tucson, AZ 85721-0065, USA
- Y. Dong
- ORCiD
- Department of Physics and Astronomy, University of California , 1 Shields Avenue, Davis, CA 95616-5270, USA
- N. Meza Retamal
- ORCiD
- Department of Physics and Astronomy, University of California , 1 Shields Avenue, Davis, CA 95616-5270, USA
- S. Valenti
- ORCiD
- Department of Physics and Astronomy, University of California , 1 Shields Avenue, Davis, CA 95616-5270, USA
- S. Boos
- ORCiD
- Department of Physics and Astronomy, University of Alabama , Tuscaloosa, AL 35487, USA
- K. J. Shen
- ORCiD
- Department of Astronomy and Theoretical Astrophysics Center, University of California , Berkeley, CA 94720, USA
- D. Townsley
- ORCiD
- Department of Physics and Astronomy, University of Alabama , Tuscaloosa, AL 35487, USA
- L. Galbany
- ORCiD
- Institute of Space Sciences (ICE-CSIC) , Campus UAB, Carrer de Can Magrans, s/n, E-08193 Barcelona, Spain; Institut dEstudis Espacials de Catalunya (IEEC) , E-08034 Barcelona, Spain
- L. Piscarreta
- Institute of Space Sciences (ICE-CSIC) , Campus UAB, Carrer de Can Magrans, s/n, E-08193 Barcelona, Spain
- R. J. Foley
- ORCiD
- Department of Astronomy and Astrophysics, University of California , Santa Cruz, CA 95064, USA
- M. J. Bustamante-Rosell
- ORCiD
- Department of Astronomy and Astrophysics, University of California , Santa Cruz, CA 95064, USA
- D. A. Coulter
- ORCiD
- Department of Astronomy and Astrophysics, University of California , Santa Cruz, CA 95064, USA
- R. Chornock
- ORCiD
- Department of Astronomy, University of California , Berkeley, CA 94720-3411, USA
- K. W. Davis
- ORCiD
- Department of Astronomy and Astrophysics, University of California , Santa Cruz, CA 95064, USA
- C. B. Dickinson
- ORCiD
- Department of Astronomy and Astrophysics, University of California , Santa Cruz, CA 95064, USA
- D. O. Jones
- ORCiD
- Gemini Observatory/NSFs NOIRLab , 670 N. Aohoku Place, Hilo, HI 96720, USA
- J. Kutcka
- ORCiD
- Department of Astronomy and Astrophysics, University of California , Santa Cruz, CA 95064, USA
- X. K. Le Saux
- ORCiD
- Department of Astronomy and Astrophysics, University of California , Santa Cruz, CA 95064, USA
- C. R. Rojas-Bravo
- ORCiD
- Department of Astronomy and Astrophysics, University of California , Santa Cruz, CA 95064, USA
- K. Taggart
- ORCiD
- Department of Astronomy and Astrophysics, University of California , Santa Cruz, CA 95064, USA
- S. Tinyanont
- ORCiD
- National Astronomical Research Institute of Thailand , 260 Moo 4, Donkaew, Maerim, Chiang Mai, 50180, Thailand
- G. Yang
- ORCiD
- The Thacher School , 5025 Thacher Road, Ojai, CA 93023, USA
- S. W. Jha
- ORCiD
- Department of Physics and Astronomy, Rutgers, The State University of New Jersey , Piscataway NJ, USA
- R. Margutti
- ORCiD
- Department of Astronomy, University of California , Berkeley, CA 94720-3411, USA; Department of Physics, University of California , 366 Physics North MC 7300, Berkeley, CA 94720, USA
- DOI
- https://doi.org/10.3847/1538-4357/ad19c9
- Journal volume & issue
-
Vol. 964,
no. 2
p. 196
Abstract
We present photometric and spectroscopic data for SN 2022joj, a nearby peculiar Type Ia supernova (SN Ia) with a fast decline rate (Δ m _15,B = 1.4 mag). SN 2022joj shows exceedingly red colors, with a value of approximately B − V ≈ 1.1 mag during its initial stages, beginning from 11 days before maximum brightness. As it evolves, the flux shifts toward the blue end of the spectrum, approaching B − V ≈ 0 mag around maximum light. Furthermore, at maximum light and beyond, the photometry is consistent with that of typical SNe Ia. This unusual behavior extends to its spectral characteristics, which initially displayed a red spectrum and later evolved to exhibit greater consistency with typical SNe Ia. Spectroscopically, we find strong agreement between SN 2022joj and double detonation models with white dwarf masses of around 1 M _⊙ and a thin He shell between 0.01 and 0.05 M _⊙ . Moreover, the early red colors are explained by line-blanketing absorption from iron peak elements created by the double detonation scenario in similar mass ranges. The nebular spectra in SN 2022joj deviate from expectations for double detonation, as we observe strong [Fe iii ] emission instead of [Ca ii ] lines as anticipated, though this is not as robust a prediction as early red colors and spectra. The fact that as He shells get thinner these SNe start to look more like normal SNe Ia raises the possibility that this is the triggering mechanism for the majority of SNe Ia, though evidence would be missed if the SNe are not observed early enough.
Keywords
