The Astrophysical Journal (Jan 2024)
SN 2020udy: A New Piece of the Homogeneous Bright Group in the Diverse Iax Subclass
- Mridweeka Singh,
- Devendra K. Sahu,
- Barnabás Barna,
- Anjasha Gangopadhyay,
- Raya Dastidar,
- Rishabh Singh Teja,
- Kuntal Misra,
- D. Andrew Howell,
- Xiaofeng Wang,
- Jun Mo,
- Shengyu Yan,
- Daichi Hiramatsu,
- Craig Pellegrino,
- G. C. Anupama,
- Arti Joshi,
- K. Azalee Bostroem,
- Jamison Burke,
- Curtis McCully,
- Rama Subramanian V,
- Gaici Li,
- Gaobo Xi,
- Xin Li,
- Zhitong Li,
- Shubham Srivastav,
- Hyobin Im,
- Anirban Dutta
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]
- Barnabás Barna
- ORCiD
- Department of Experimental Physics, Institute of Physics, University of Szeged , H-6720 Szeged, Dóm tér 9, Hungary
- Anjasha Gangopadhyay
- ORCiD
- Hiroshima Astrophysical Science Center, Hiroshima University , Higashi-Hiroshima, Japan
- 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
- Rishabh Singh Teja
- ORCiD
- Indian Institute of Astrophysics , Koramangala 2nd Block, Bangalore 560034, India ; [email protected], [email protected]; Pondicherry University , R.V. Nagar, Kalapet, 605014, Puducherry, India
- Kuntal Misra
- ORCiD
- Aryabhatta Research Institute of observational sciencES , Manora Peak, Nainital, 263001, India
- 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
- Xiaofeng Wang
- ORCiD
- Physics Department, Tsinghua University , Beijing, 100084, People's Republic of China; Beijing Planetarium, Beijing Academy of Science and Technology , Beijing, 100044, People's Republic of China
- Jun Mo
- Physics Department, Tsinghua University , Beijing, 100084, People's Republic of China
- Shengyu Yan
- ORCiD
- Physics Department, Tsinghua University , Beijing, 100084, People's Republic of China
- 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
- 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
- G. C. Anupama
- ORCiD
- Indian Institute of Astrophysics , Koramangala 2nd Block, Bangalore 560034, India ; [email protected], [email protected]
- Arti Joshi
- ORCiD
- Institute of Astrophysics, Pontificia Universidad Católica de Chile , Av. Vicuña MacKenna 4860, 7820436, Santiago, Chile
- 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
- 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
- Rama Subramanian V
- Department of Sciences, Amrita School of Physical Sciences , Amrita Vishwa Vidyapeetham, Coimbatore, Tamil Nadu, 641112, India
- Gaici Li
- Physics Department, Tsinghua University , Beijing, 100084, People's Republic of China
- Gaobo Xi
- Physics Department, Tsinghua University , Beijing, 100084, People's Republic of China
- Xin Li
- ORCiD
- Beijing Planetarium, Beijing Academy of Science and Technology , Beijing, 100044, People's Republic of China
- Zhitong Li
- National Astronomical Observatories of China, Chinese Academy of Sciences , Beijing, 100012, People's Republic of China
- Shubham Srivastav
- ORCiD
- Astrophysics Research Centre, School of Mathematics and Physics, Queen's University Belfast , Belfast BT7 1NN, UK
- 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
- Anirban Dutta
- ORCiD
- Indian Institute of Astrophysics , Koramangala 2nd Block, Bangalore 560034, India ; [email protected], [email protected]; Pondicherry University , Chinna Kalapet, Kalapet, Puducherry 605014, India
- DOI
- https://doi.org/10.3847/1538-4357/ad2618
- Journal volume & issue
-
Vol. 965,
no. 1
p. 73
Abstract
We present optical observations and analysis of the bright type Iax supernova SN 2020udy hosted by NGC 0812. The evolution of the light curve of SN 2020udy is similar to that of other bright type Iax SNe. Analytical modeling of the quasi-bolometric light curves of SN 2020udy suggests that 0.08 ± 0.01 M _⊙ of ^56 Ni would have been synthesized during the explosion. The spectral features of SN 2020udy are similar to those of the bright members of type Iax class, showing a weak Si ii line. The late-time spectral sequence is mostly dominated by iron group elements with broad emission lines. Abundance tomography modeling of the spectral time series of SN 2020udy using TARDIS indicates stratification in the outer ejecta; however, to confirm this, spectral modeling at a very early phase is required. After maximum light, uniform mixing of chemical elements is sufficient to explain the spectral evolution. Unlike in the case of normal type Ia SNe, the photospheric approximation remains robust until +100 days, requiring an additional continuum source. Overall, the observational features of SN 2020udy are consistent with the deflagration of a carbon–oxygen white dwarf.
Keywords
