Pith. sign in

REVIEW 1 cited by

Strong Carbon Features and a Red Early Color in the Underluminous Type Ia SN 2022xkq

Not yet reviewed by Pith; the record is open.

Re-run · record.json Download PDF Read on arXiv ↗

This paper has not been read by Pith yet. Machine review is queued; the pith claim, tier, and objections will appear here once it completes.

SPECIMEN: schema-true, not a live event

T0 review · schema-true

One-sentence machine reading of the paper's core claim.

pith:XXXXXXXX · record.json · timestamp

arxiv 2309.10054 v2 pith:7A3IBMFE submitted 2023-09-18 astro-ph.HE astro-ph.SR

Strong Carbon Features and a Red Early Color in the Underluminous Type Ia SN 2022xkq

Jeniveve Pearson , David J. Sand , Peter Lundqvist , Llu\'is Galbany , Jennifer E. Andrews , K. Azalee Bostroem , Yize Dong , Emily Hoang
show 80 more authors
Griffin Hosseinzadeh Daryl Janzen Jacob E. Jencson Michael J. Lundquist Darshana Mehta Nicol\'as Meza Retamal Manisha Shrestha Stefano Valenti Samuel Wyatt Joseph P. Anderson Chris Ashall Katie Auchettl Eddie Baron St\'ephane Blondin Christopher R. Burns Yongzhi Cai Ting-Wan Chen Laura Chomiuk David A. Coulter Dane Cross Kyle W. Davis Thomas de Jaeger James M. DerKacy Dhvanil D. Desai Georgios Dimitriadis Aaron Do Joseph R. Farah Ryan J. Foley Mariusz Gromadzki Claudia P. Guti\'errez Joshua Haislip Jonay I. Gonz\'alez Hern\'andez Jason T. Hinkle Willem B. Hoogendam D. Andrew Howell Peter Hoeflich Eric Hsiao Mark E. Huber Saurabh W. Jha Cristina Jim\'enez Palau Charles D. Kilpatrick Vladimir Kouprianov Sahana Kumar Lindsey A. Kwok Conor Larison Natalie LeBaron Xavier Le Saux Jing Lu Curtis McCully Tycho Mera Evans Peter Milne Maryam Modjaz Nidia Morrell Tom\'as E. M\"uller-Bravo Megan Newsome Matt Nicholl Estefania Padilla Gonzalez Anna V. Payne Craig Pellegrino Kim Phan Jonathan Pineda-Garc\'ia Anthony L. Piro Lara Piscarreta Abigail Polin Daniel E. Reichart C\'esar Rojas-Bravo Stuart D. Ryder Irene Salmaso Michaela Schwab Melissa Shahbandeh Benjamin J. Shappee Matthew R. Siebert Nathan Smith Jay Strader Kirsty Taggart Giacomo Terreran Samaporn Tinyanont M. A. Tucker Giorgio Valerin D. R. Young
This is my paper
classification astro-ph.HE astro-ph.SR
keywords explosiondaysopticalearlyobservationsbg-likecarboncolor
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
0 comments
Share X Bluesky LinkedIn Reddit HN
read the original abstract

We present optical, infrared, ultraviolet, and radio observations of SN 2022xkq, an underluminous fast-declining type Ia supernova (SN Ia) in NGC 1784 ($\mathrm{D}\approx31$ Mpc), from $<1$ to 180 days after explosion. The high-cadence observations of SN 2022xkq, a photometrically transitional and spectroscopically 91bg-like SN Ia, cover the first days and weeks following explosion which are critical to distinguishing between explosion scenarios. The early light curve of SN 2022xkq has a red early color and exhibits a flux excess which is more prominent in redder bands; this is the first time such a feature has been seen in a transitional/91bg-like SN Ia. We also present 92 optical and 19 near-infrared (NIR) spectra, beginning 0.4 days after explosion in the optical and 2.6 days after explosion in the NIR. SN 2022xkq exhibits a long-lived C I 1.0693 $\mu$m feature which persists until 5 days post-maximum. We also detect C II $\lambda$6580 in the pre-maximum optical spectra. These lines are evidence for unburnt carbon that is difficult to reconcile with the double detonation of a sub-Chandrasekhar mass white dwarf. No existing explosion model can fully explain the photometric and spectroscopic dataset of SN 2022xkq, but the considerable breadth of the observations is ideal for furthering our understanding of the processes which produce faint SNe Ia.

discussion (0)

Sign in with ORCID, Apple, or X to comment. Anyone can read and Pith papers without signing in.

Forward citations

Cited by 1 Pith paper

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. The type Ia supernova 2023vjh: a peculiar 1991bg-like SN with unusually faint light curves

    astro-ph.HE 2026-07 accept novelty 5.0

    SN 2023vjh is an unusually faint 91bg-like SN Ia whose light curves and colors suggest possible CSM extinction despite minimal host interstellar dust signatures.