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dc.contributor.authorXu, Siyien_US
dc.contributor.authorHallakoun, Na’amaen_US
dc.contributor.authorGary, Bruceen_US
dc.contributor.authorDalba, Paul A.en_US
dc.contributor.authorDebes, Johnen_US
dc.contributor.authorDufour, Patricken_US
dc.contributor.authorFortin-Archambault, Maudeen_US
dc.contributor.authorFukui, Akihikoen_US
dc.contributor.authorJura, Michael A.en_US
dc.contributor.authorKlein, Bethen_US
dc.contributor.authorKusakabe, Nobuhikoen_US
dc.contributor.authorMuirhead, Philip S.en_US
dc.contributor.authorNarita, Norioen_US
dc.contributor.authorSteele, Amyen_US
dc.contributor.authorSu, Kate Y.L.en_US
dc.contributor.authorVanderburg, Andrewen_US
dc.contributor.authorWatanabe, Noriharuen_US
dc.contributor.authorZhan, Zhuchangen_US
dc.contributor.authorZuckerman, Benen_US
dc.date.accessioned2020-03-25T14:38:29Z
dc.date.available2020-03-25T14:38:29Z
dc.date.issued2019-06-05
dc.identifier.citationSiyi Xu, Na’ama Hallakoun, Bruce Gary, Paul A. Dalba, John Debes, Patrick Dufour, Maude Fortin-Archambault, Akihiko Fukui, Michael A. Jura, Beth Klein, Nobuhiko Kusakabe, Philip S. Muirhead, Norio Narita, Amy Steele, Kate Y.L. Su, Andrew Vanderburg, Noriharu Watanabe, Zhuchang Zhan, Ben Zuckerman. 2019. "Shallow Ultraviolet Transits of WD 1145+017." The Astronomical Journal, Volume 157, Issue 6, pp. 255 - 255. https://doi.org/10.3847/1538-3881/ab1b36
dc.identifier.issn1538-3881
dc.identifier.urihttps://hdl.handle.net/2144/39806
dc.description.abstractWD 1145+017 is a unique white dwarf system that has a heavily polluted atmosphere, an infrared excess from a dust disk, numerous broad absorption lines from circumstellar gas, and changing transit features, likely from fragments of an actively disintegrating asteroid. Here, we present results from a large photometric and spectroscopic campaign with Hubble Space Telescope, Keck, Very Large Telescope (VLT), Spitzer, and many other smaller telescopes from 2015 to 2018. Somewhat surprisingly the ultraviolet (UV) transit depths are always shallower than those in the optical. We develop a model that can quantitatively explain the observed "bluing" and confirm the previous finding that: (1) the transiting objects, circumstellar gas, and white dwarf are all aligned along our line of sight; (2) the transiting object is blocking a larger fraction of the circumstellar gas than of the white dwarf itself. Because most circumstellar lines are concentrated in the UV, the UV flux appears to be less blocked compared to the optical during a transit, leading to a shallower UV transit. This scenario is further supported by the strong anticorrelation between optical transit depth and circumstellar line strength. We have yet to detect any wavelength-dependent transits caused by the transiting material around WD 1145+017.en_US
dc.format.extentp. 255 - 255en_US
dc.language.isoen_US
dc.publisherAmerican Astronomical Societyen_US
dc.relation.ispartofThe Astronomical Journal
dc.rights© 2019 The American Astronomical Society.en_US
dc.subjectCircumstellar matteren_US
dc.subjectGeneral astroidsen_US
dc.subjectIndividual starsen_US
dc.subjectWhite dwarfsen_US
dc.subjectAstronomy & astrophysicsen_US
dc.subjectAstronomical and space sciencesen_US
dc.subjectMinor planetsen_US
dc.titleShallow Ultraviolet Transits of WD 1145+017en_US
dc.typeArticleen_US
dc.description.versionPublished versionen_US
dc.identifier.doi10.3847/1538-3881/ab1b36
pubs.elements-sourcemanual-entryen_US
pubs.notesEmbargo: Not knownen_US
pubs.organisational-groupBoston Universityen_US
pubs.organisational-groupBoston University, College of Arts & Sciencesen_US
pubs.organisational-groupBoston University, College of Arts & Sciences, Department of Astronomyen_US
pubs.publication-statusPublisheden_US
dc.date.online2019-06-05
dc.identifier.orcid0000-0002-0638-8822 (Muirhead, Philip S)
dc.identifier.mycv477800


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