Facial reconstruction

Search LJMU Research Online

Browse Repository | Browse E-Theses

Early Ultraviolet Observations of Type IIn Supernovae Constrain the Asphericity of Their Circumstellar Material

Soumagnac, MT, Ofek, EO, Liang, J, Gal-yam, A, Nugent, P, Yang, Y, Cenko, SB, Sollerman, J, Perley, DA, Andreoni, I, Barbarino, C, Burdge, KB, Bruch, RJ, De, K, Dugas, A, Fremling, C, Graham, ML, Hankins, MJ, Strotjohann, NL, Moran, S , Neill, JD, Schulze, S, Shupe, DL, Sipocz, BM, Taggart, K, Tartaglia, L, Walters, R, Yan, L, Yao, Y, Yaron, O, Bellm, EC, Cannella, C, Dekany, R, Duev, DA, Feeney, M, Frederick, S, Graham, MJ, Laher, RR, Masci, FJ, Kasliwal, MM, Kowalski, M, Kupfer, T, Miller, AA, Rigault, M and Ben, R (2020) Early Ultraviolet Observations of Type IIn Supernovae Constrain the Asphericity of Their Circumstellar Material. Astrophysical Journal, 899 (1). ISSN 0004-637X

[img] Text
Early Ultraviolet Observations of Type IIn Supernovae Constrain the Asphericity of Their Circumstellar Material.pdf - Accepted Version
Restricted to Repository staff only until 11 August 2021.

Download (1MB)

Abstract

We present a survey of the early evolution of 12 Type IIn supernovae (SNe IIn) at ultraviolet and visible light wavelengths. We use this survey to constrain the geometry of the circumstellar material (CSM) surrounding SN IIn explosions, which may shed light on their progenitor diversity. In order to distinguish between aspherical and spherical CSM, we estimate the blackbody radius temporal evolution of the SNe IIn of our sample, following the method introduced by Soumagnac et al. We find that higher-luminosity objects tend to show evidence for aspherical CSM. Depending on whether this correlation is due to physical reasons or to some selection bias, we derive a lower limit between 35% and 66% for the fraction of SNe IIn showing evidence for aspherical CSM. This result suggests that asphericity of the CSM surrounding SNe IIn is common—consistent with data from resolved images of stars undergoing considerable mass loss. It should be taken into account for more realistic modeling of these events.

Item Type: Article
Additional Information: Maayane T. Soumagnac et al 2020 ApJ 899 51
Uncontrolled Keywords: 0201 Astronomical and Space Sciences, 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics, 0306 Physical Chemistry (incl. Structural)
Subjects: Q Science > QB Astronomy
Q Science > QC Physics
Divisions: Astrophysics Research Institute
Publisher: American Astronomical Society; IOP Publishing
Related URLs:
Date Deposited: 09 Sep 2020 11:11
Last Modified: 09 Sep 2020 11:15
DOI or Identification number: 10.3847/1538-4357/ab94be
URI: https://researchonline.ljmu.ac.uk/id/eprint/13611

Actions (login required)

View Item View Item