On the progenitor of the type IIP SN 2013ej in M74

Morgan Fraser; Justyn R. Maund; Stephen J. Smartt; Rubina Kotak; Andy Lawrence; Alastair Bruce; Stefano Valenti; Fang Yuan; Stefano Benetti; Ting Wan Chen; Avishay Gal-Yam; Cosimo Inserra; David R. Young

doi:10.1093/mnrasl/slt179

On the progenitor of the type IIP SN 2013ej in M74

Morgan Fraser^*, Justyn R. Maund, Stephen J. Smartt, Rubina Kotak, Andy Lawrence, Alastair Bruce, Stefano Valenti, Fang Yuan, Stefano Benetti, Ting Wan Chen, Avishay Gal-Yam, Cosimo Inserra, David R. Young

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

55 Citations (Scopus)

Abstract

We use natural seeing imaging of SN 2013ej in M74 to identify a progenitor candidate in archival Hubble Space Telescope (HST) + Advanced Camera for Survey images. We find a source coincident with the supernova (SN) in the F814W filter within the total 75 mas (~3 pc astrometric uncertainty; however, the position of the progenitor candidate in contemporaneous F435W and F555W filters is significantly offset. We conclude that the 'progenitor candidate' is in fact two physically unrelated sources; a blue source which is likely unrelated to the SN, and a red source which we suggest exploded as SN 2013ej. Deep images with the same instrument on board HST taken when the SN has faded (in approximately two year's time) will allow us to accurately characterize the unrelated neighbouring source and hence determine the intrinsic flux of the progenitor in three filters.We suggest that the F814W flux is dominated by the progenitor of SN 2013ej, and assuming a bolometric correction appropriate to an M-type supergiant, we estimate that the mass of the progenitor of SN 2013ej was between 8 and 15.5M⊙.

Original language	English
Article number	slt179
Pages (from-to)	L56-L60
Journal	Monthly Notices of the Royal Astronomical Society: Letters
Volume	439
Issue number	1
DOIs	https://doi.org/10.1093/mnrasl/slt179
Publication status	Published - Mar 2014

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title = "On the progenitor of the type IIP SN 2013ej in M74",

abstract = "We use natural seeing imaging of SN 2013ej in M74 to identify a progenitor candidate in archival Hubble Space Telescope (HST) + Advanced Camera for Survey images. We find a source coincident with the supernova (SN) in the F814W filter within the total 75 mas (~3 pc astrometric uncertainty; however, the position of the progenitor candidate in contemporaneous F435W and F555W filters is significantly offset. We conclude that the 'progenitor candidate' is in fact two physically unrelated sources; a blue source which is likely unrelated to the SN, and a red source which we suggest exploded as SN 2013ej. Deep images with the same instrument on board HST taken when the SN has faded (in approximately two year's time) will allow us to accurately characterize the unrelated neighbouring source and hence determine the intrinsic flux of the progenitor in three filters.We suggest that the F814W flux is dominated by the progenitor of SN 2013ej, and assuming a bolometric correction appropriate to an M-type supergiant, we estimate that the mass of the progenitor of SN 2013ej was between 8 and 15.5M⊙.",

keywords = "Galaxies: Individual: NGC 628, Stars: Massive, Supernovae: General, Supernovae: Individual: SN 2013ej",

author = "Morgan Fraser and Maund, {Justyn R.} and Smartt, {Stephen J.} and Rubina Kotak and Andy Lawrence and Alastair Bruce and Stefano Valenti and Fang Yuan and Stefano Benetti and Chen, {Ting Wan} and Avishay Gal-Yam and Cosimo Inserra and Young, {David R.}",

year = "2014",

month = mar,

doi = "10.1093/mnrasl/slt179",

language = "English",

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AU - Fraser, Morgan

AU - Maund, Justyn R.

AU - Smartt, Stephen J.

AU - Kotak, Rubina

AU - Lawrence, Andy

AU - Bruce, Alastair

AU - Valenti, Stefano

AU - Yuan, Fang

AU - Benetti, Stefano

AU - Chen, Ting Wan

AU - Gal-Yam, Avishay

AU - Inserra, Cosimo

AU - Young, David R.

PY - 2014/3

Y1 - 2014/3

N2 - We use natural seeing imaging of SN 2013ej in M74 to identify a progenitor candidate in archival Hubble Space Telescope (HST) + Advanced Camera for Survey images. We find a source coincident with the supernova (SN) in the F814W filter within the total 75 mas (~3 pc astrometric uncertainty; however, the position of the progenitor candidate in contemporaneous F435W and F555W filters is significantly offset. We conclude that the 'progenitor candidate' is in fact two physically unrelated sources; a blue source which is likely unrelated to the SN, and a red source which we suggest exploded as SN 2013ej. Deep images with the same instrument on board HST taken when the SN has faded (in approximately two year's time) will allow us to accurately characterize the unrelated neighbouring source and hence determine the intrinsic flux of the progenitor in three filters.We suggest that the F814W flux is dominated by the progenitor of SN 2013ej, and assuming a bolometric correction appropriate to an M-type supergiant, we estimate that the mass of the progenitor of SN 2013ej was between 8 and 15.5M⊙.

AB - We use natural seeing imaging of SN 2013ej in M74 to identify a progenitor candidate in archival Hubble Space Telescope (HST) + Advanced Camera for Survey images. We find a source coincident with the supernova (SN) in the F814W filter within the total 75 mas (~3 pc astrometric uncertainty; however, the position of the progenitor candidate in contemporaneous F435W and F555W filters is significantly offset. We conclude that the 'progenitor candidate' is in fact two physically unrelated sources; a blue source which is likely unrelated to the SN, and a red source which we suggest exploded as SN 2013ej. Deep images with the same instrument on board HST taken when the SN has faded (in approximately two year's time) will allow us to accurately characterize the unrelated neighbouring source and hence determine the intrinsic flux of the progenitor in three filters.We suggest that the F814W flux is dominated by the progenitor of SN 2013ej, and assuming a bolometric correction appropriate to an M-type supergiant, we estimate that the mass of the progenitor of SN 2013ej was between 8 and 15.5M⊙.

KW - Galaxies: Individual: NGC 628

KW - Stars: Massive

KW - Supernovae: General

KW - Supernovae: Individual: SN 2013ej

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On the progenitor of the type IIP SN 2013ej in M74

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