The Astrophysical Journal (Jan 2023)
Observational Properties of a Bright Type lax SN 2018cni and a Faint Type Iax SN 2020kyg
- Mridweeka Singh,
- Devendra. K. Sahu,
- Raya Dastidar,
- Barnabás Barna,
- Kuntal Misra,
- Anjasha Gangopadhyay,
- D. Andrew Howell,
- Saurabh W. Jha,
- Hyobin Im,
- Kirsty Taggart,
- Jennifer Andrews,
- Daichi Hiramatsu,
- Rishabh Singh Teja,
- Craig Pellegrino,
- Ryan J. Foley,
- Arti Joshi,
- G. C. Anupama,
- K. Azalee Bostroem,
- Jamison Burke,
- Yssavo Camacho-Neves,
- Anirban Dutta,
- Lindsey A. Kwok,
- Curtis McCully,
- Yen-Chen Pan,
- Matt Siebert,
- Shubham Srivastav,
- Tamás Szalai,
- Jonathan J. Swift,
- Grace Yang,
- Henry Zhou,
- Nico DiLullo,
- Jackson Scheer
Affiliations
- Mridweeka Singh
- ORCiD
- Indian Institute of Astrophysics , Koramangala 2nd Block, Bangalore 560034, India ; [email protected], [email protected]
- Devendra. K. Sahu
- ORCiD
- Indian Institute of Astrophysics , Koramangala 2nd Block, Bangalore 560034, India ; [email protected], [email protected]
- Raya Dastidar
- ORCiD
- Millennium Institute of Astrophysics (MAS) , Nuncio Monsenor Sòtero Sanz 100, Providencia, Santiago RM, Chile; Instituto de Astrofísica, Universidad Andres Bello , Fernandez Concha 700, Las Condes, Santiago RM, Chile
- Barnabás Barna
- ORCiD
- Department of Experimental Physics, Institute of Physics, University of Szeged , H-6720 Szeged, Dóm tér 9, Hungary
- Kuntal Misra
- ORCiD
- Aryabhatta Research Institute of observational sciencES , Manora Peak, Nainital 263 001, India
- Anjasha Gangopadhyay
- ORCiD
- Hiroshima Astrophysical Science Center, Hiroshima University , Higashi-Hiroshima, Japan
- D. Andrew Howell
- ORCiD
- Las Cumbres Observatory , 6740 Cortona Drive Suite 102, Goleta, CA 93117-5575, USA; Department of Physics, University of California , Santa Barbara, CA 93106-9530, USA
- Saurabh W. Jha
- ORCiD
- Department of Physics and Astronomy, Rutgers, the State University of New Jersey , 136 Frelinghuysen Road, Piscataway, NJ 08854-8019, USA
- Hyobin Im
- ORCiD
- Korea Astronomy and Space Science Institute , 776 Daedeokdae-ro, Yuseong-gu, Daejeon 34055, Republic of Korea; Korea University of Science and Technology (UST) , 217 Gajeong-ro, Yuseong-gu, Daejeon 34113, Republic of Korea
- Kirsty Taggart
- ORCiD
- Department of Astronomy and Astrophysics, University of California , Santa Cruz, CA 95064, USA
- Jennifer Andrews
- ORCiD
- Gemini Observatory , 670 North A’ohoku Place, Hilo, HI 96720-2700, USA
- Daichi Hiramatsu
- ORCiD
- Las Cumbres Observatory , 6740 Cortona Drive Suite 102, Goleta, CA 93117-5575, USA; Department of Physics, University of California , Santa Barbara, CA 93106-9530, USA; Center for Astrophysics , Harvard & Smithsonian, 60 Garden Street, Cambridge, MA 02138-1516, USA; The NSF AI Institute for Artificial Intelligence and Fundamental Interactions , USA
- Rishabh Singh Teja
- ORCiD
- Indian Institute of Astrophysics , Koramangala 2nd Block, Bangalore 560034, India ; [email protected], [email protected]; Pondicherry University , R.V. Nagar, Kalapet, Puducherry 605014, India
- Craig Pellegrino
- ORCiD
- Las Cumbres Observatory , 6740 Cortona Drive Suite 102, Goleta, CA 93117-5575, USA; Department of Physics, University of California , Santa Barbara, CA 93106-9530, USA
- Ryan J. Foley
- ORCiD
- Department of Astronomy and Astrophysics, University of California , Santa Cruz, CA 95064-1077, USA
- Arti Joshi
- ORCiD
- Indian Institute of Astrophysics , Koramangala 2nd Block, Bangalore 560034, India ; [email protected], [email protected]
- G. C. Anupama
- ORCiD
- Indian Institute of Astrophysics , Koramangala 2nd Block, Bangalore 560034, India ; [email protected], [email protected]
- K. Azalee Bostroem
- ORCiD
- DiRAC Institute, Department of Astronomy, University of Washington , Box 351580, U.W., Seattle, WA 98195, USA
- Jamison Burke
- ORCiD
- Las Cumbres Observatory , 6740 Cortona Drive Suite 102, Goleta, CA 93117-5575, USA; Department of Physics, University of California , Santa Barbara, CA 93106-9530, USA
- Yssavo Camacho-Neves
- ORCiD
- Department of Physics and Astronomy, Rutgers, the State University of New Jersey , 136 Frelinghuysen Road, Piscataway, NJ 08854-8019, USA
- Anirban Dutta
- Indian Institute of Astrophysics , Koramangala 2nd Block, Bangalore 560034, India ; [email protected], [email protected]; Pondicherry University , Chinna Kalapet, Kalapet, Puducherry 605014, India
- Lindsey A. Kwok
- ORCiD
- Department of Physics and Astronomy, Rutgers, the State University of New Jersey , 136 Frelinghuysen Road, Piscataway, NJ 08854-8019, USA
- Curtis McCully
- ORCiD
- Las Cumbres Observatory , 6740 Cortona Drive Suite 102, Goleta, CA 93117-5575, USA; Department of Physics, University of California , Santa Barbara, CA 93106-9530, USA
- Yen-Chen Pan
- ORCiD
- Graduate Institute of Astronomy, National Central University , 300 Zhongda Road, Zhongli, Taoyuan 32001, Taiwan
- Matt Siebert
- ORCiD
- Department of Astronomy and Astrophysics, University of California , Santa Cruz, CA 95064, USA
- Shubham Srivastav
- ORCiD
- Astrophysics Research Centre, School of Mathematics and Physics, Queen's University Belfast , Belfast BT7 1NN, UK
- Tamás Szalai
- ORCiD
- Department of Experimental Physics, Institute of Physics, University of Szeged , H-6720 Szeged, Dóm tér 9, Hungary; ELKH-SZTE Stellar Astrophysics Research Group , H-6500 Baja, Szegedi út, Kt. 766, Hungary
- Jonathan J. Swift
- ORCiD
- Thacher School , 5025 Thacher Road, Ojai, CA 93023-8304, USA
- Grace Yang
- ORCiD
- Thacher School , 5025 Thacher Road, Ojai, CA 93023-8304, USA
- Henry Zhou
- ORCiD
- Thacher School , 5025 Thacher Road, Ojai, CA 93023-8304, USA
- Nico DiLullo
- ORCiD
- Thacher School , 5025 Thacher Road, Ojai, CA 93023-8304, USA
- Jackson Scheer
- ORCiD
- Thacher School , 5025 Thacher Road, Ojai, CA 93023-8304, USA
- DOI
- https://doi.org/10.3847/1538-4357/acd559
- Journal volume & issue
-
Vol. 953,
no. 1
p. 93
Abstract
We present the optical photometric and spectroscopic analysis of two Type Iax supernovae (SNe), 2018cni and 2020kyg. SN 2018cni is a bright Type Iax SN ( M _V _,peak = −17.81 ± 0.21 mag), whereas SN 2020kyg ( M _V _,peak = −14.52 ± 0.21 mag) is a faint one. We derive ^56 Ni mass of 0.07 and 0.002 M _⊙ and ejecta mass of 0.48 and 0.14 M _⊙ for SNe 2018cni and 2020kyg, respectively. A combined study of the bright and faint Type Iax SNe in R / r -band reveals that the brighter objects tend to have a longer rise time. However, the correlation between the peak luminosity and decline rate shows that bright and faint Type Iax SNe exhibit distinct behavior. Comparison with standard deflagration models suggests that SN 2018cni is consistent with the deflagration of a CO white dwarf, whereas the properties of SN 2020kyg can be better explained by the deflagration of a hybrid CONe white dwarf. The spectral features of both the SNe point to the presence of similar chemical species but with different mass fractions. Our spectral modeling indicates stratification at the outer layers and mixed inner ejecta for both of the SNe.
Keywords
