The Astrophysical Journal (Jan 2024)
Evidence of Weak Circumstellar Medium Interaction in the Type II SN 2023axu
- Manisha Shrestha,
- Jeniveve Pearson,
- Samuel Wyatt,
- David J. Sand,
- Griffin Hosseinzadeh,
- K. Azalee Bostroem,
- Jennifer E. Andrews,
- Yize Dong,
- Emily Hoang,
- Daryl Janzen,
- Jacob E. Jencson,
- Michael Lundquist,
- Darshana Mehta,
- Nicolás Meza Retamal,
- Stefano Valenti,
- Jillian C. Rastinejad,
- Phil Daly,
- Dallan Porter,
- Joannah Hinz,
- Skyler Self,
- Benjamin Weiner,
- G. Grant Williams,
- Daichi Hiramatsu,
- D. Andrew Howell,
- Curtis McCully,
- Estefania Padilla Gonzalez,
- Craig Pellegrino,
- Giacomo Terreran,
- Megan Newsome,
- Joseph Farah,
- Koichi Itagaki,
- Saurabh W. Jha,
- Lindsey Kwok,
- Nathan Smith,
- Michaela Schwab,
- Jeonghee Rho,
- Yi Yang
Affiliations
- Manisha Shrestha
- ORCiD
- Steward Observatory, University of Arizona , 933 North Cherry Avenue, Tucson, AZ 85721-0065, USA ; [email protected]
- Jeniveve Pearson
- ORCiD
- Steward Observatory, University of Arizona , 933 North Cherry Avenue, Tucson, AZ 85721-0065, USA ; [email protected]
- Samuel Wyatt
- ORCiD
- Department of Astronomy, University of Washington , 3910 15th Avenue NE, Seattle, WA 98195-0002, USA
- David J. Sand
- ORCiD
- Steward Observatory, University of Arizona , 933 North Cherry Avenue, Tucson, AZ 85721-0065, USA ; [email protected]
- Griffin Hosseinzadeh
- ORCiD
- Steward Observatory, University of Arizona , 933 North Cherry Avenue, Tucson, AZ 85721-0065, USA ; [email protected]
- K. Azalee Bostroem
- ORCiD
- Steward Observatory, University of Arizona , 933 North Cherry Avenue, Tucson, AZ 85721-0065, USA ; [email protected]
- Jennifer E. Andrews
- ORCiD
- Gemini Observatory , 670 North A‘ohoku Place, Hilo, HI 96720-2700, USA
- Yize Dong
- ORCiD
- Department of Physics and Astronomy, University of California , Davis, 1 Shields Avenue, Davis, CA 95616-5270, USA
- Emily Hoang
- ORCiD
- Department of Physics and Astronomy, University of California , Davis, 1 Shields Avenue, Davis, CA 95616-5270, USA
- Daryl Janzen
- ORCiD
- Department of Physics & Engineering Physics, University of Saskatchewan , 116 Science Place, Saskatoon, SK S7N 5E2, Canada
- Jacob E. Jencson
- ORCiD
- Department of Physics and Astronomy, The Johns Hopkins University , 3400 North Charles Street, Baltimore, MD 21218, USA
- Michael Lundquist
- ORCiD
- W. M. Keck Observatory , 65-1120 Māmalahoa Highway, Kamuela, HI 96743-8431, USA
- Darshana Mehta
- Department of Physics and Astronomy, University of California , Davis, 1 Shields Avenue, Davis, CA 95616-5270, USA
- Nicolás Meza Retamal
- ORCiD
- Department of Physics and Astronomy, University of California , Davis, 1 Shields Avenue, Davis, CA 95616-5270, USA
- Stefano Valenti
- ORCiD
- Department of Physics and Astronomy, University of California , Davis, 1 Shields Avenue, Davis, CA 95616-5270, USA
- Jillian C. Rastinejad
- ORCiD
- Center for Interdisciplinary Exploration and Research in Astrophysics (CIERA) and Department of Physics and Astronomy, Northwestern University , Evanston, IL 60208, USA
- Phil Daly
- Steward Observatory, University of Arizona , 933 North Cherry Avenue, Tucson, AZ 85721-0065, USA ; [email protected]
- Dallan Porter
- MMT and Steward Observatories, University of Arizona , 933 North Cherry Avenue, Tucson, AZ 85721-0065, USA
- Joannah Hinz
- ORCiD
- MMT and Steward Observatories, University of Arizona , 933 North Cherry Avenue, Tucson, AZ 85721-0065, USA
- Skyler Self
- MMT and Steward Observatories, University of Arizona , 933 North Cherry Avenue, Tucson, AZ 85721-0065, USA
- Benjamin Weiner
- ORCiD
- MMT and Steward Observatories, University of Arizona , 933 North Cherry Avenue, Tucson, AZ 85721-0065, USA
- G. Grant Williams
- ORCiD
- Steward Observatory, University of Arizona , 933 North Cherry Avenue, Tucson, AZ 85721-0065, USA ; [email protected]; MMT and Steward Observatories, University of Arizona , 933 North Cherry Avenue, Tucson, AZ 85721-0065, USA
- Daichi Hiramatsu
- ORCiD
- Center for Astrophysics ∣ Harvard & Smithsonian , 60 Garden Street, Cambridge, MA 02138-1516, USA; The NSF AI Institute for Artificial Intelligence and Fundamental Interactions , USA
- 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
- 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
- Estefania Padilla Gonzalez
- 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
- 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
- Giacomo Terreran
- 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
- Megan Newsome
- 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
- Joseph Farah
- 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
- Koichi Itagaki
- Itagaki Astronomical Observatory , Yamagata 990-2492, Japan
- Saurabh W. Jha
- ORCiD
- Department of Physics and Astronomy, Rutgers, The State University of New Jersey , 136 Frelinghuysen Road, Piscataway, NJ 08854-8019, USA
- Lindsey Kwok
- ORCiD
- Department of Physics and Astronomy, Rutgers, The State University of New Jersey , 136 Frelinghuysen Road, Piscataway, NJ 08854-8019, USA
- Nathan Smith
- ORCiD
- Steward Observatory, University of Arizona , 933 North Cherry Avenue, Tucson, AZ 85721-0065, USA ; [email protected]
- Michaela Schwab
- ORCiD
- Department of Physics and Astronomy, Rutgers, The State University of New Jersey , 136 Frelinghuysen Road, Piscataway, NJ 08854-8019, USA
- Jeonghee Rho
- ORCiD
- SETI Institute , 339 Bernardo Avenue, Suite 200, Mountain View, CA 94043, USA
- Yi Yang
- ORCiD
- Department of Astronomy, University of California, Berkeley , Berkeley, CA 94720-3411, USA
- DOI
- https://doi.org/10.3847/1538-4357/ad11e1
- Journal volume & issue
-
Vol. 961,
no. 2
p. 247
Abstract
We present high-cadence photometric and spectroscopic observations of SN 2023axu, a classical Type II supernova with an absolute V -band peak magnitude of –17.2 ± 0.1 mag. SN 2023axu was discovered by the Distance Less Than 40 Mpc (DLT40) survey within 1 day of the last nondetection in the nearby galaxy NGC 2283 at 13.7 Mpc. We modeled the early light curve using a recently updated shock cooling model that includes the effects of line blanketing and found the explosion epoch to be MJD 59971.48 ± 0.03 and the probable progenitor to be a red supergiant. The shock cooling model underpredicts the overall UV data, which point to a possible interaction with circumstellar material. This interpretation is further supported by spectral behavior. We see a ledge feature around 4600 Å in the very early spectra (+1.1 and +1.5 days after the explosion), which can be a sign of circumstellar interaction. The signs of circumstellar material are further bolstered by the presence of absorption features blueward of H α and H β at day >40, which is also generally attributed to circumstellar interaction. Our analysis shows the need for high-cadence early photometric and spectroscopic data to decipher the mass-loss history of the progenitor.
Keywords
- Core-collapse supernovae
- Type II supernovae
- Red supergiant stars
- Stellar mass loss
- Circumstellar matter
