The Spectral SN-GRB Connection: Systematic Spectral Comparisons between Type Ic Supernovae, and broad-lined Type Ic Supernovae with and without Gamma-Ray Bursts

Maryam Modjaz, Yuqian Q. Liu, Federica B. Bianco, Or Graur
9/23/2015
astro-ph.HEastro-ph.SR

Official code: metal-sn/SESNtemple (7 stars, MIT, last commit 2024-11-26). 1 more implementation below.

Abstract

We present the first systematic investigation of spectral properties of 17 Type Ic Supernovae (SNe Ic), 10 broad-lined SNe Ic (SNe Ic-bl) without observed Gamma-Ray Bursts (GRBs) and 11 SNe Ic-bl with GRBs (SN-GRBs) as a function of time in order to probe their explosion conditions and progenitors. We analyze a total of 407 spectra, which were drawn from published spectra of individual SNe as well as from the densely time-sampled spectra data of Modjaz et al. (2014). In order to quantify the diversity of the SN spectra as a function of SN subtype, we construct average spectra of SNe Ic, SNe Ic-bl without GRBs and SNe Ic-bl with GRBs. We find that SN 1994I is not a typical SN Ic, in contrast to common belief, while the spectra of SN 1998bw/GRB 980425 are representative of mean spectra of SNe Ic-bl. We measure the ejecta absorption and width velocities using a new method described here and find that SNe Ic-bl with GRBs, on average, have quantifiably higher absorption velocities, as well as broader line widths than SNe without observed GRBs. In addition, we search for correlations between SN-GRB spectral properties and the energies of their accompanying GRBs. Finally, we show that the absence of clear He lines in optical spectra of SNe Ic-bl, and in particular of SN-GRBs, is not due to them being too smeared out due to the high velocities present in the ejecta. This implies that the progenitor stars of SN-GRBs are probably He-free, in addition to being H-free, which puts strong constraints on the stellar evolutionary paths needed to produce such SN-GRB progenitors at the observed low metallicities.

View on arXivView PDF

Code Implementations(2)

metal-sn/SESNtempleOfficial100%
MIT

Contains data products from Liu & Modjaz (2014), Liu et al. (2016), Modjaz et al. (2016) and Williamson et al. (2019) on Stripped Envelope SNe (SESNe) and from Liu, Modjaz & Bianco (2017) on SLSNe Ic.

79Jun 9, 20161 years agoMIT
metal-sn/SESNspectraLibOfficial100%
MIT

Contains code that was developed and used in Liu et al. (2016) and Modjaz et al. (2016) to process and analyze spectra of Stripped-Envelope Supenovae (SESNe)."

45IDL, PythonJun 9, 20162 years agoMIT

Similar Papers

Identifying Doppelganger Active Galactic Nuclei across redshifts from spectroscopic surveys

78% match2025

Optimal Classification and Outlier Detection for Stripped-Envelope Core-Collapse Supernovae

77% match1 repo72019

Illuminating Low-Surface-Brightness Galaxies with the Hyper Suprime-Cam Survey

73% match1 repo122017

The UVES Spectral Quasar Absorption Database (SQUAD) Data Release 1: The first 10 million seconds

72% match1 repo72018

Stellar Karaoke: deep blind separation of terrestrial atmospheric effects out of stellar spectra by velocity whitening

72% match2023

Detecting Damped Lyman-α Absorbers with Gaussian Processes

72% match1 repo32016

Cite this paper

@article{modjaz2015spectral,
  title  = {The Spectral SN-GRB Connection: Systematic Spectral Comparisons between Type Ic Supernovae, and broad-lined Type Ic Supernovae with and without Gamma-Ray Bursts},
  author = {Maryam Modjaz and Yuqian Q. Liu and Federica B. Bianco and Or Graur},
  year   = {2015},
  eprint = {1509.07124},
  archivePrefix = {arXiv},
  url    = {https://arxiv.org/abs/1509.07124}
}

Add a badge to your README

Shows whether official code is linked for this paper.

Code of Paper badge
[![Code of Paper](https://codeofpaper.com/badge/1509.07124.svg)](https://codeofpaper.com/paper/1509.07124)

Discussion