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dc.contributor.authorKowalski, Adam F.
dc.contributor.authorHawley, Suzanne L.
dc.contributor.authorHilton, Eric J.
dc.contributor.authorBecker, Andrew C.
dc.contributor.authorWest, Andrew A.
dc.contributor.authorBochanski, John J.
dc.contributor.authorSesar, Branimir
dc.date.accessioned2015-01-12T19:30:05Z
dc.date.available2015-01-12T19:30:05Z
dc.date.issued2009-07
dc.date.submitted2009-03
dc.identifier.issn0004-6256
dc.identifier.issn1538-3881
dc.identifier.urihttp://hdl.handle.net/1721.1/92800
dc.description.abstractWe present a flare rate analysis of 50,130 M dwarf light curves in Sloan Digital Sky Survey Stripe 82. We identified 271 flares using a customized variability index to search ~2.5 million photometric observations for flux increases in the u and g bands. Every image of a flaring observation was examined by eye and with a point-spread function-matching and image subtraction tool to guard against false positives. Flaring is found to be strongly correlated with the appearance of Hα in emission in the quiet spectrum. Of the 99 flare stars that have spectra, we classify eight as relatively inactive. The flaring fraction is found to increase strongly in stars with redder colors during quiescence, which can be attributed to the increasing flare visibility and increasing active fraction for redder stars. The flaring fraction is strongly correlated with |Z| distance such that most stars that flare are within 300 pc of the Galactic plane. We derive flare u-band luminosities and find that the most luminous flares occur on the earlier-type m dwarfs. Our best estimate of the lower limit on the flaring rate (averaged over Stripe 82) for flares with Δu ≥ 0.7 mag on stars with u < 22 is 1.3 flares hr[superscript –1] deg[superscript –2] but can vary significantly with the line of sight.en_US
dc.description.sponsorshipNational Science Foundation (U.S.) (Grant AST-06-07644)en_US
dc.description.sponsorshipAlfred P. Sloan Foundationen_US
dc.description.sponsorshipNational Science Foundation (U.S.)en_US
dc.description.sponsorshipUnited States. Dept. of Energyen_US
dc.description.sponsorshipUnited States. National Aeronautics and Space Administrationen_US
dc.description.sponsorshipJapanese Monbukagakushoen_US
dc.description.sponsorshipMax Planck Society for the Advancement of Scienceen_US
dc.description.sponsorshipHigher Education Funding Council for Englanden_US
dc.language.isoen_US
dc.publisherIOP Publishingen_US
dc.relation.isversionofhttp://dx.doi.org/10.1088/0004-6256/138/2/633en_US
dc.rightsArticle is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.en_US
dc.sourceAmerican Astronomical Societyen_US
dc.titleM dwarfs in Sloan Digital Sky Survey Stripe 82: Photometric light curves and flare rate analysisen_US
dc.typeArticleen_US
dc.identifier.citationKowalski, Adam F., Suzanne L. Hawley, Eric J. Hilton, Andrew C. Becker, Andrew A. West, John J. Bochanski, and Branimir Sesar. “M Dwarfs in Sloan Digital Sky Survey Stripe 82: Photometric Light Curves and Flare Rate Analysis.” The Astronomical Journal 138, no. 2 (July 8, 2009): 633–648. © 2009 The American Astronomical Societyen_US
dc.contributor.departmentKavli Institute for Astrophysics and Space Researchen_US
dc.contributor.mitauthorWest, Andrew A.en_US
dc.contributor.mitauthorBochanski, John J.en_US
dc.relation.journalAstronomical Journalen_US
dc.eprint.versionFinal published versionen_US
dc.type.urihttp://purl.org/eprint/type/JournalArticleen_US
eprint.statushttp://purl.org/eprint/status/PeerRevieweden_US
dspace.orderedauthorsKowalski, Adam F.; Hawley, Suzanne L.; Hilton, Eric J.; Becker, Andrew C.; West, Andrew A.; Bochanski, John J.; Sesar, Branimiren_US
mit.licensePUBLISHER_POLICYen_US


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