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- W3044132024 endingPage "3250" @default.
- W3044132024 startingPage "3234" @default.
- W3044132024 abstract "Supersoft X-rays sources (SSSs) have been proposed as potential Type Ia supernova (SN Ia) progenitors. If such objects are indeed persistently X-ray luminous and embedded in sufficiently dense ISM, they will be surrounded by extended nebular emission. These nebulae should persist even long after a SN Ia explosion, due to the long recombination and cooling times involved. With this in mind, we searched for nebular [O III] emission around four SSSs and three SNRs in the Large Magellanic Cloud, using the 6.5m Baade telescope at Las Campanas Observatory and the IMACS camera. We confirm that, out of the four SSS candidates, only CAL 83 can be associated with an [O III] nebula. The [O III] luminosity for the other objects are constrained to $lesssim 17%$ of that of CAL 83 at 6.8 pc from the central source. Models computed with the photoionization code CLOUDY indicate that either the ISM densities in the environments of CAL 87, RX J0550.0-7151 and RX J0513.9-6951 must be significantly lower than surrounding CAL 83, or the average X-ray luminosities of these sources over the last $lesssim 10,000$ years must be significantly lower than presently observed, in order to be consistent with the observed luminosity upper limits. For the three SNRs we consider (all with ages $< 1000$ years), our [O III] flux measurements together with the known surrounding ISM densities strongly constrain the ionizing luminosity of their progenitors in the last several thousand years, independent of the progenitor channel." @default.
- W3044132024 created "2020-07-29" @default.
- W3044132024 creator A5026372567 @default.
- W3044132024 creator A5042400001 @default.
- W3044132024 creator A5057429031 @default.
- W3044132024 creator A5067881179 @default.
- W3044132024 date "2020-07-28" @default.
- W3044132024 modified "2023-10-10" @default.
- W3044132024 title "Supersoft X-ray nebulae in the Large Magellanic Cloud" @default.
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- W3044132024 doi "https://doi.org/10.1093/mnras/staa2213" @default.
- W3044132024 hasPublicationYear "2020" @default.
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