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Searching for nova shells around cataclysmic variables
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Sahman, D. I., Dhillon, V. S., Knigge, C. and Marsh, Tom (2015) Searching for nova shells around cataclysmic variables. Monthly Notices of the Royal Astronomical Society, 451 (3). pp. 2863-2876. doi:10.1093/mnras/stv1150 ISSN 0035-8711.
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Official URL: http://dx.doi.org/10.1093/mnras/stv1150
Abstract
We present the results of a search for nova shells around 101 cataclysmic variables (CVs), using H α images taken with the 4.2-m William Herschel Telescope (WHT) and the 2.5-m Isaac Newton Telescope Photometric H α Survey of the Northern Galactic Plane (IPHAS). Both telescopes are located on La Palma. We concentrated our WHT search on nova-like variables, whilst our IPHAS search covered all CVs in the IPHAS footprint. We found one shell out of the 24 nova-like variables we examined. The newly discovered shell is around V1315 Aql and has a radius of ∼2.5 arcmin, indicative of a nova eruption approximately 120 yr ago. This result is consistent with the idea that the high mass-transfer rate exhibited by nova-like variables is due to enhanced irradiation of the secondary by the hot white dwarf following a recent nova eruption. The implications of our observations for the lifetime of the nova-like variable phase are discussed. We also examined four asynchronous polars, but found no new shells around any of them, so we are unable to confirm that a recent nova eruption is the cause of the asynchronicity in the white dwarf spin. We find tentative evidence of a faint shell around the dwarf nova V1363 Cyg. In addition, we find evidence for a light echo around the nova V2275 Cyg, which erupted in 2001, indicative of an earlier nova eruption ∼300 yr ago, making V2275 Cyg a possible recurrent nova.
Item Type: | Journal Article | ||||||
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||||
Journal or Publication Title: | Monthly Notices of the Royal Astronomical Society | ||||||
Publisher: | Oxford University Press | ||||||
ISSN: | 0035-8711 | ||||||
Official Date: | 11 August 2015 | ||||||
Dates: |
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Volume: | 451 | ||||||
Number: | 3 | ||||||
Page Range: | pp. 2863-2876 | ||||||
DOI: | 10.1093/mnras/stv1150 | ||||||
Status: | Peer Reviewed | ||||||
Publication Status: | Published | ||||||
Access rights to Published version: | Restricted or Subscription Access |
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