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dc.contributor.authorSagear, Sheilaen_US
dc.contributor.authorMuirhead, Philipen_US
dc.contributor.authorSkinner Manegold, Julieen_US
dc.coverage.spatialSeattle, WAen_US
dc.date.accessioned2020-04-22T13:23:36Z
dc.date.available2020-04-22T13:23:36Z
dc.date.issued2019-01-08
dc.identifierhttps://aas.org/meetings/aas233
dc.identifier.citationSheila Sagear, Philip Muirhead, Julie Skinner Manegold. 2019. "Constraining Planet Occurrence Around Ultracool Dwarfs Observed by K2."
dc.identifier.urihttps://hdl.handle.net/2144/40275
dc.descriptionAn undergrad mentee presented her research at the meeting. I am a co-author of the presentation. The abstract is available on ADS: https://ui.adsabs.harvard.edu/abs/2019AAS...23314019S/abstracten_US
dc.description.abstractThough we expect many planets around ultracool dwarfs, few have been detected. The K2 mission presents a unique opportunity to search for transiting planets around a large sample of ultracool dwarfs and place constraints on planet occurrence at the bottom of the main sequence. Planet detection using the transit method is dependent not only on geometric transit probability but also the effectiveness of transit-searching methods. In this work, we use K2 observations to measure transit detection efficiency in ultracool dwarfs and use our transit detection efficiency to calculate an upper limit on the planet occurrence rate. We measure our ability to recover various types of transits around dwarfs at the M/L transition. We inject synthetic planetary transits of radii from 0.1 to 3.5 Earth radii and of periods from 0.3 to 26 days into 382 K2 light curves of late-type M and L dwarfs. We attempt to recover them using Box-Least Squares and Levenberg-Marquardt optimization methods. We then calculate a detection efficiency, or fraction recovered, and a threshold of detectability relating to orbital period and radius for each dwarf. We present an upper limit on the planet occurrence rate, as well as constraints on the probability of seeing no planets around a given number of ultracool dwarfs.en_US
dc.language.isoen_US
dc.subjectSolar and stellar astrophysicsen_US
dc.titleConstraining planet occurrence around ultracool dwarfs observed by K2en_US
dc.typePresentationen_US
dc.description.versionPublished versionen_US
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
dc.identifier.orcid0000-0002-0638-8822 (Muirhead, Philip)
dc.identifier.mycv514785


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