Page, KL;
Osborne, JP;
Kuin, NPM;
Henze, M;
Walter, FM;
Beardmore, AP;
Bode, MF;
... Woodward, CE; + view all
(2015)
Swift detection of the super-swift switch-on of the super-soft phase in nova V745 Sco (2014).
Monthly Notices of the Royal Astronomical Society
, 454
(3)
pp. 3108-3120.
10.1093/mnras/stv2144.
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Abstract
V745 Sco is a recurrent nova, with the most recent eruption occurring in February 2014. V745 Sco was first observed by Swift a mere 3.7 h after the announcement of the optical discovery, with the super-soft X-ray emission being detected around 4 d later and lasting for only ∼2 d, making it both the fastest follow-up of a nova by Swift and the earliest switch-on of super-soft emission yet detected. Such an early switch-on time suggests a combination of a very high velocity outflow and low ejected mass and, together with the high effective temperature reached by the super-soft emission, a high mass white dwarf (>1.3 M). The X-ray spectral evolution was followed from an early epoch where shocked emission was evident, through the entirety of the super-soft phase, showing evolving column density, emission lines, absorption edges, and thermal continuum temperature. UV grism data were also obtained throughout the super-soft interval, with the spectra showing mainly emission lines from lower ionization transitions and the Balmer continuum in emission. V745 Sco is compared with both V2491 Cyg (another nova with a very short super-soft phase) and M31N 2008-12a (the most rapidly recurring nova yet discovered). The longer recurrence time compared to M31N 2008-12a could be due to a lower mass accretion rate, although inclination of the system may also play a part. Nova V745 Sco (2014) revealed the fastest evolving supe
| Type: | Article |
|---|---|
| Title: | Swift detection of the super-swift switch-on of the super-soft phase in nova V745 Sco (2014) |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1093/mnras/stv2144 |
| Publisher version: | http://doi.org/10.1093/mnras/stv2144 |
| Language: | English |
| Additional information: | This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | stars: individual: V745 Sco – novae, cataclysmic variables – ultraviolet: stars – X-rays: stars. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Space and Climate Physics |
| URI: | https://discovery.ucl.ac.uk/id/eprint/1491554 |
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