Show simple item record

Files in this item

Thumbnail

Item metadata

dc.contributor.authorKesseli, Aurora Y.
dc.contributor.authorPetkova, Maya A.
dc.contributor.authorWood, Kenneth
dc.contributor.authorWhitney, Barbara A.
dc.contributor.authorHillenbrand, L. A.
dc.contributor.authorGregory, Scott G.
dc.contributor.authorStauffer, J. R.
dc.contributor.authorMorales-Calderon, M.
dc.contributor.authorRebull, L.
dc.contributor.authorAlencar, S. H. P.
dc.date.accessioned2016-09-29T11:30:21Z
dc.date.available2016-09-29T11:30:21Z
dc.date.issued2016-09-01
dc.identifier.citationKesseli , A Y , Petkova , M A , Wood , K , Whitney , B A , Hillenbrand , L A , Gregory , S G , Stauffer , J R , Morales-Calderon , M , Rebull , L & Alencar , S H P 2016 , ' A model for (quasi-)periodic multi-wavelength photometric variability in young stellar objects ' , Astrophysical Journal , vol. 828 , no. 1 , 42 . https://doi.org/10.3847/0004-637X/828/1/42en
dc.identifier.issn0004-637X
dc.identifier.otherPURE: 246364474
dc.identifier.otherPURE UUID: 7fa8a3c3-1f07-414e-bed0-f07783da960e
dc.identifier.otherArXiv: http://arxiv.org/abs/1607.00385v1
dc.identifier.otherScopus: 84987704142
dc.identifier.otherWOS: 000386894900042
dc.identifier.urihttps://hdl.handle.net/10023/9575
dc.description.abstractWe present radiation transfer models of rotating young stellar objects (YSOs) with hotspots in their atmospheres, inner disk warps and other 3-D effects in the nearby circumstellar environment. Our models are based on the geometry expected from the magneto-accretion theory, where material moving inward in the disk flows along magnetic field lines to the star and creates stellar hotspots upon impact. Due to rotation of the star and magnetosphere, the disk is variably illuminated. We compare our model light curves to data from the Spitzer YSOVAR project (Morales-Calderon et al. 2014, Cody et al. 2014) to determine if these processes can explain the variability observed at optical and mid-infrared wavelengths in young stars. We focus on those variables exhibiting "dipper" behavior that may be periodic, quasi-periodic, or aperiodic. We find that the stellar hotspot size and temperature affects the optical and near-infrared light curves, while the shape and vertical extent of the inner disk warp affects the mid-IR light curve variations. Clumpy disk distributions with non-uniform fractal density structure produce more stochastic light curves. We conclude that the magneto-accretion theory is consistent with certain aspects of the multi-wavelength photometric variability exhibited by low-mass YSOs. More detailed modeling of individual sources can be used to better determine the stellar hotspot and inner disk geometries of particular sources.
dc.format.extent15
dc.language.isoeng
dc.relation.ispartofAstrophysical Journalen
dc.rights© 2016, The American Astronomical Society. This work is made available online in accordance with the publisher’s policies. This is the final published version of the work, which was originally published at iopscience.iop.org / https://dx.doi.org/10.3847/0004-637X/828/1/42en
dc.subjectStars: pre-main sequenceen
dc.subjectStars: variablesen
dc.subjectT Taurien
dc.subjectHerbig Ae/Been
dc.subjectQB Astronomyen
dc.subjectQC Physicsen
dc.subjectNDASen
dc.subject.lccQBen
dc.subject.lccQCen
dc.titleA model for (quasi-)periodic multi-wavelength photometric variability in young stellar objectsen
dc.typeJournal articleen
dc.contributor.sponsorScience & Technology Facilities Councilen
dc.description.versionPublisher PDFen
dc.contributor.institutionUniversity of St Andrews. School of Physics and Astronomyen
dc.identifier.doihttps://doi.org/10.3847/0004-637X/828/1/42
dc.description.statusPeer revieweden
dc.identifier.grantnumberST/M001296/1en


This item appears in the following Collection(s)

Show simple item record