Sun, N.-C. orcid.org/0000-0002-4731-9698, Maund, J.R. orcid.org/0000-0003-0733-7215
, Crowther, P.A. et al. (5 more authors)
(2022)
An environmental analysis of the Type Ib SN 2019yvr and the possible presence of an inflated binary companion.
Monthly Notices of the Royal Astronomical Society, 510 (3).
pp. 3701-3715.
ISSN 0035-8711
Abstract
SN 2019yvr is the second Type Ib supernova (SN) with a possible direct detection of its progenitor (system); however, the spectral energy distribution (SED) of the pre-explosion source appears much cooler and overluminous than an expected helium-star progenitor. Using Hubble Space Telescope (HST) images and MUSE integral-field-unit (IFU) spectroscopy, we find the SN environment contains three episodes of star formation; the low ejecta mass suggests the SN progenitor is most likely from the oldest population, corresponding to an initial mass of 10.4+1.5−1.3 M⊙. The pre-explosion SED can be reproduced by two components, one for the hot and compact SN progenitor and one for a cool and inflated yellow hypergiant (YHG) companion that dominates the brightness. Thus, SN 2019yvr could possibly be the first Type Ib/c SN for which the progenitor’s binary companion is directly detected on pre-explosion images. Both the low progenitor mass and the YHG companion suggest significant binary interaction during their evolution. Similar to SN 2014C, SN 2019yvr exhibits a metamorphosis from Type Ib to Type IIn, showing signatures of interaction with hydrogen-rich circumstellar material (CSM) at >150 d; our result supports enhanced pre-SN mass-loss as an important process for hydrogen-poor stars at the lower mass end of core-collapse SN progenitors.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2021 The Author(s). Published by Oxford University Press on behalf of Royal Astronomical Society. Reproduced in accordance with the publisher's self-archiving policy. |
Keywords: | supernovae: general; supernovae: individual: 2019yvr |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Science (Sheffield) > Department of Physics and Astronomy (Sheffield) |
Funding Information: | Funder Grant number Science and Technology Facilities Council ST/V000853/1 |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 03 Mar 2022 08:34 |
Last Modified: | 03 Mar 2022 08:34 |
Status: | Published |
Publisher: | Oxford University Press (OUP) |
Refereed: | Yes |
Identification Number: | 10.1093/mnras/stab3768 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:184286 |