Environmental dependence of Type IIn supernova properties

Moriya, Takashi J.; Galbany, L.; Jimenez-Palau, C.; Anderson, J. P.; Kuncarayakti, H.; Sánchez, S. F.; Lyman, J.; Pessi, Thallis; Prieto, J. L.; Kochanek, C. S.; Dong, Subo; Chen, Ping

doi:10.1051/0004-6361/202346703

Cited by 3 publications

(1 citation statement)

References 71 publications

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“…This indicates that the progenitors of our candidate SNRs might be shorter lived, and hence more massive, than those of a typical CCSNe. A similar trend has been found for the environments of Type IIn SNe by Moriya et al (2023).…”

Section: Young Snr Candidatessupporting

confidence: 85%

Recovering Lost Light: Discovery of Supernova Remnants with Integral Field Spectroscopy

Martínez-Rodríguez,

Galbany,

Badenes

et al. 2024

ApJ

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We present results from a systematic search for broad (≥ 400 km s−1) Hα emission in integral field spectroscopy data cubes of ∼1200 nearby galaxies obtained with PMAS and MUSE. We found 19 unique regions that pass our quality cuts, four of which match the locations of previously discovered supernovae (SNe): one Type IIP and three Type IIn, including the well-known SN 2005ip. We suggest that these objects are young Supernova remnants (SNRs), with bright and broad Hα emission powered by the interaction between the SN ejecta and dense circumstellar material. The stellar ages measured at the locations of these SNR candidates are systematically lower by about 0.5 dex than those measured at the locations of core-collapse (CC) SNe, implying that their progenitors might be shorter lived and therefore more massive than a typical CCSN progenitor. The methods laid out in this work open a new window into the study of nearby SNe with integral field spectroscopy.

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Section: Young Snr Candidatessupporting

confidence: 85%

Recovering Lost Light: Discovery of Supernova Remnants with Integral Field Spectroscopy

Martínez-Rodríguez,

Galbany,

Badenes

et al. 2024

ApJ

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Searching for precursor activity of Type IIn supernovae

Reguitti,

Pignata,

Pastorello

et al. 2024

A&A

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We conducted a search for luminous outbursts prior to the explosion of Type IIn supernovae (SNe IIn). We built a sample of 27 objects spectroscopically classified as SNe IIn and all located at $z<0.015$. Using deep archival SN fields images ---taken up to nearly 20 years prior to the SN explosions themselves--- from transient surveys (PTF, ZTF, DES and CHASE) and major astronomical observatories (European Southern Observatory, ESO and National Optical Astronomy Observatory, NOAO), we found at least one outburst years to months before the explosion of seven SNe IIn, with the earliest precursor being 10 years prior to the explosion of SN 2019bxq. The maximum absolute magnitudes of the outbursts range between $-$11.5 mag and $-$15 mag, and the eruptive phases last for a few weeks to a few years. The $g-r$ colour measured for three objects during their outburst is relatively red, with $g-r$ ranging between 0.5 and 1.0 mag. This is similar to the colour expected during the eruptions of luminous blue variables. We note that the light curves of SNe with pre-SN outbursts have faster decline rates than those of the SNe that do not show pre-SN outbursts. SN 2011fh is remarkable, as it is still visible 12 years after the luminous SN-like event, indicating that the progenitor possibly survived, or that the interaction is still ongoing. We detect precursor activity in 29<!PCT!> of bona fide SNe IIn in our sample. However, a quantitative assessment of the observational biases affecting the sample suggests that this fraction is an underestimation of the intrinsic precursor occurrence rate.

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SN 2021adxl: A luminous nearby interacting supernova in an extremely low-metallicity environment

Brennan,

Schulze,

Lunnan

et al. 2024

A&A

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is a slowly evolving, luminous, Type IIn supernova with asymmetric emission line profiles, similar to the well-studied SN 2010jl. We present extensive optical, near-ultraviolet, and near-infrared photometry and spectroscopy covering sim 1.5 years post discovery. occurred in an unusual environment, atop a vigorously star-forming region that is offset from its host galaxy core. The appearance of and O II as well as the compact core, would classify the host of as a ``Blueberry'' galaxy, analogous to higher redshift, low-metallicity, star-forming dwarf ``Green Pea'' galaxies . Using several abundance indicators, we find a metallicity of the explosion environment of only $ odot $, the lowest reported metallicity for a Type IIn SN environment. reaches a peak magnitude of _r mag and since discovery has faded by only sim 4 magnitudes in the $r$ band with a cumulative radiated energy of $ $ erg over 18 months. shows strong signs of interaction with a complex circumstellar medium, seen by the detection of X-rays, revealed by the detection of coronal emission lines, and through multi-component hydrogen and helium profiles. In order to further understand this interaction, we model the profile using a Monte Carlo electron scattering code. The blueshifted high-velocity component is consistent with emission from a radially thin spherical shell resulting in the broad emission components due to electron scattering. Using the velocity evolution of this emitting shell, we find that the SN ejecta collide with circumstellar material of at least sim 5 assuming a steady-state mass-loss rate of $ for the first sim 200 days of evolution. was last observed to be slowly declining at $ mag $, and if this trend continues will remain observable after its current solar conjunction. Continuing the observations of may reveal signatures of dust formation or an infrared excess, similar to that seen for SN 2010jl.

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Environmental dependence of Type IIn supernova properties

Cited by 3 publications

References 71 publications

Recovering Lost Light: Discovery of Supernova Remnants with Integral Field Spectroscopy

Recovering Lost Light: Discovery of Supernova Remnants with Integral Field Spectroscopy

Searching for precursor activity of Type IIn supernovae

SN 2021adxl: A luminous nearby interacting supernova in an extremely low-metallicity environment

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