Long-term photometric variations in the candidate white-dwarf pulsar AR Scorpii from K2 , CRTS, and ASAS-SN observations

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dc.contributor.author Littlefield, Colin
dc.contributor.author Garnavich, Peter M.
dc.contributor.author Kennedy, Mark R.
dc.contributor.author Callanan, Paul J.
dc.contributor.author Shappee, Benjamin
dc.contributor.author Holoien, Thomas
dc.date.accessioned 2018-02-12T14:41:56Z
dc.date.available 2018-02-12T14:41:56Z
dc.date.issued 2017-08-10
dc.identifier.citation Colin, L., Peter, G., Mark, K., Paul, C., Benjamin, S. and Thomas, H. (2017) 'Long-term Photometric Variations in the Candidate White-dwarf Pulsar AR Scorpii from K2 , CRTS, and ASAS-SN Observations', The Astrophysical Journal Letters, 845(1), pp. L7. doi: 10.3847/2041-8213/aa8300 en
dc.identifier.volume 845 en
dc.identifier.issued 1 en
dc.identifier.startpage 1 en
dc.identifier.endpage 5 en
dc.identifier.issn 2041-8205
dc.identifier.uri http://hdl.handle.net/10468/5443
dc.identifier.doi 10.3847/2041-8213/aa8300
dc.description.abstract We analyze long-cadence Kepler K2 observations of AR Sco from 2014, along with survey photometry obtained between 2005 and 2016 by the Catalina Real-Time Sky Survey and the All-Sky Automated Survey for Supernovae. The K2 data show the orbital modulation to have been fairly stable during the 78 days of observations, but we detect aperiodic deviations from the average waveform with an amplitude of ~2% on a timescale of a few days. A comparison of the K2 data with the survey photometry reveals that the orbital waveform gradually changed between 2005 and 2010, with the orbital maximum shifting to earlier phases. We compare these photometric variations with proposed models of this unusual system. en
dc.format.mimetype application/pdf en
dc.language.iso en en
dc.publisher Institute of Physics Publishing en
dc.relation.uri http://stacks.iop.org/2041-8205/845/i=1/a=L7
dc.rights © 2017. The American Astronomical Society. All rights reserved. en
dc.subject Binaries: close en
dc.subject Pulsars en
dc.subject Stars: individual (AR Sco) en
dc.subject Stars: magnetic field en
dc.subject White dwarfs en
dc.title Long-term photometric variations in the candidate white-dwarf pulsar AR Scorpii from K2 , CRTS, and ASAS-SN observations en
dc.type Article (peer-reviewed) en
dc.internal.authorcontactother Paul Callanan, Physics, University College Cork, Cork, Ireland. +353-21-490-3000 Email: paulc@miranda.ucc.ie en
dc.internal.availability Full text available en
dc.date.updated 2018-02-12T14:34:33Z
dc.description.version Published Version en
dc.internal.rssid 425476432
dc.description.status Peer reviewed en
dc.identifier.journaltitle The Astrophysical Journal Letters en
dc.internal.copyrightchecked No !!CORA!! en
dc.internal.licenseacceptance Yes en
dc.internal.IRISemailaddress paulc@miranda.ucc.ie en

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