Two stripped envelope supernovae with circumstellar interaction

  title={Two stripped envelope supernovae with circumstellar interaction},
  author={Jesper Sollerman and C. Fransson and Cristina Barbarino and Christoffer U. Fremling and Assaf Horesh and Erik C. Kool and Steve Schulze and Itai Sfaradi and S. Yang and Eric C. Bellm and Rick S. Burruss and Virginia Cunningham and Kishalay De and Andrew J. Drake and V. Zach Golkhou and David A. Green and Mansi M. Kasliwal and Shrinivas R. Kulkarni and Thomas Kupfer and Russ R. Laher and Frank J. Masci and Hector Rodriguez and Ben Rusholme and D. R. W. Williams and L. Yan and Jeffry Zolkower},
  journal={Astronomy and Astrophysics},
Context. We present observations of SN 2019tsf (ZTF19ackjszs) and SN 2019oys (ZTF19abucwzt). These two stripped envelope (SE) Type Ib supernovae (SNe) suddenly showed a (re-)brightening in their late light curves. We investigate this in the context of circumstellar material (CSM) interaction with previously ejected material, a phenomenon that is unusual among SE SNe. Aims. We use our follow-up photometry and spectroscopy for these supernovae to demonstrate the presence of CSM interaction… 

Figures and Tables from this paper

A Physical Model of Delayed Rebrightenings in Shock-interacting Supernovae without Narrow-line Emission
Core-collapse supernovae can display evidence of interaction with preexisting, circumstellar shells of material by rebrightening and forming spectral lines, and can even change types as hydrogen
Optical Rebrightening of Extragalactic Transients from the Zwicky Transient Facility
Ongoing large-scale optical time-domain surveys, such as the Zwicky Transient Facility (ZTF), are producing alerts at unprecedented rates. Analysis of transient sources has so far followed two
A Family Tree of Optical Transients from Narrow-line Seyfert 1 Galaxies
The Zwicky Transient Facility (ZTF) has discovered five events (0.01 < z < 0.4) belonging to an emerging class of active galactic nuclei (AGNs) undergoing smooth, large-amplitude, and rapidly rising
A cool and inflated progenitor candidate for the Type Ib supernova 2019yvr at 2.6 yr before explosion
We present Hubble Space Telescope imaging of a pre-explosion counterpart to SN 2019yvr obtained 2.6 yr before its explosion as a type Ib supernova (SN Ib). Aligning to a post-explosion
Clumps and Rings of Ejecta in SNR 0540–69.3 as Seen in 3D
The distribution of ejecta in young supernova remnants offers a powerful observational probe of their explosions and progenitors. Here we present a 3D reconstruction of the ejecta in SNR 0540-69.3,
SN 2018ijp: the explosion of a stripped-envelope star within a dense H-rich shell?
In this paper, we discuss the outcomes of the follow-up campaign of SN 2018ijp, discovered as part of the Zwicky Transient Facility survey for optical transients. Its first spectrum shows
The Final Months of Massive Star Evolution from the Circumstellar Environment around SN Ic 2020oi
We present the results of Atacama Large Millimeter/submillimeter Array (ALMA) band 3 observations of the nearby type Ic supernova (SN) 2020oi. Under the standard assumptions on the SN-circumstellar
Is supernova SN 2020faa an iPTF14hls look-alike?
We present observations of SN 2020faa. This Type II supernova displays a luminous light curve that started to rebrighten from an initial decline. We investigate this in relation to the famous


Supernova Interaction with a Dense Detached Shell in SN 2001em
We carry out a comprehensive analysis of supernova \snem\ covering a period of 19 years since discovery. SN 2001em is the oldest supernova known to have undergone a metamorphosis from a stripped
Thermal and Non-thermal Emission from Circumstellar Interaction
It has become clear during the last decades that the interaction between the supernova ejecta and the circumstellar medium is playing a major role both for the observational properties of the
Predicted Fe II Emission-Line Strengths from Active Galactic Nuclei
We present theoretical Fe ii emission line strengths for physical conditions typical of active galactic nuclei with broad-line regions. The Fe ii line strengths were computed with a precise treatment
The 6dF Galaxy Survey : peculiar velocity field and cosmography
We derive peculiar velocities for the 6dF Galaxy Survey (6dFGS) and describe the velocity field of the nearby ( z< 0.055) Southern hemisphere. The survey comprises 8885 galaxies for which we have
Measuring Reddening with Sloan Digital Sky Survey Stellar Spectra and Recalibrating SFD
We present measurements of dust reddening using the colors of stars with spectra in the Sloan Digital Sky Survey. We measure reddening as the difference between the measured and predicted colors of a
Lyα Fluorescent Excitation of Fe II in Active Galactic Nuclei
We have calculated Fe II emission-line strengths for active galactic nuclei broad-line regions using precise radiative transfer and Iron Project atomic data. We improve the treatment of all
The relationship between infrared, optical, and ultraviolet extinction
The parameterized extinction data of Fitzpatrick and Massa (1986, 1988) for the ultraviolet and various sources for the optical and near-infrared are used to derive a meaningful average extinction
Selective excitation of Fe II in the laboratory and late-type stellar atmospheres
Les spectres a faible resolution de geantes froides et supergeantes observes par l'IUE contiennent des structures d'emission pour lesquelles il est difficile d'obtenir des identifications sans
The peculiar mass-loss history of SN 2014C as revealed through AMI radio observations
We present a radio light curve of supernova (SN) 2014C taken with the Arcminute Microkelvin Imager (AMI) Large Array at 15.7 GHz. Optical observations presented by Milisavljevic et al. demonstrated
PTF12os and iPTF13bvn. Two stripped-envelope supernovae from low-mass progenitors in NGC 5806
We investigate two stripped-envelope supernovae (SNe) discovered in the nearby galaxy NGC 5806 by the (i)PTF. These SNe, designated PTF12os/SN 2012P and iPTF13bvn, exploded at a similar distance from