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

dc.contributor.authorLittlefield, Colin
dc.contributor.authorGarnavich, Peter M.
dc.contributor.authorKennedy, Mark R.
dc.contributor.authorCallanan, Paul J.
dc.contributor.authorShappee, Benjamin
dc.contributor.authorHoloien, Thomas
dc.date.accessioned2018-02-12T14:41:56Z
dc.date.available2018-02-12T14:41:56Z
dc.date.issued2017-08-10
dc.date.updated2018-02-12T14:34:33Z
dc.description.abstractWe 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.description.statusPeer revieweden
dc.description.versionPublished Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationColin, 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/aa8300en
dc.identifier.doi10.3847/2041-8213/aa8300
dc.identifier.endpage5en
dc.identifier.issn2041-8205
dc.identifier.issued1en
dc.identifier.journaltitleThe Astrophysical Journal Lettersen
dc.identifier.startpage1en
dc.identifier.urihttps://hdl.handle.net/10468/5443
dc.identifier.volume845en
dc.language.isoenen
dc.publisherInstitute of Physics Publishingen
dc.relation.urihttp://stacks.iop.org/2041-8205/845/i=1/a=L7
dc.rights© 2017. The American Astronomical Society. All rights reserved.en
dc.subjectBinaries: closeen
dc.subjectPulsarsen
dc.subjectStars: individual (AR Sco)en
dc.subjectStars: magnetic fielden
dc.subjectWhite dwarfsen
dc.titleLong-term photometric variations in the candidate white-dwarf pulsar AR Scorpii from K2 , CRTS, and ASAS-SN observationsen
dc.typeArticle (peer-reviewed)en
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