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Optimal survey strategies and predicted planet yields for the Korean microlensing telescope network

Henderson, Calen B.; Gaudi, B S; Han, C; Skowron, Jan; Penny, Matthew P.; Nataf, David; Gould, A

Description

The Korean Microlensing Telescope Network (KMTNet) will consist of three 1.6 m telescopes each with a 4 deg2field of view (FoV) and will be dedicated to monitoring the Galactic Bulge to detect exoplanets via gravitational microlensing. KMTNet's combination of aperture size, FoV, cadence, and longitudinal coverage will provide a unique opportunity to probe exoplanet demographics in an unbiased way. Here we present simulations that optimize the observing strategy for and predict the planetary...[Show more]

dc.contributor.authorHenderson, Calen B.
dc.contributor.authorGaudi, B S
dc.contributor.authorHan, C
dc.contributor.authorSkowron, Jan
dc.contributor.authorPenny, Matthew P.
dc.contributor.authorNataf, David
dc.contributor.authorGould, A
dc.date.accessioned2015-12-13T22:32:21Z
dc.identifier.issn0004-637X
dc.identifier.urihttp://hdl.handle.net/1885/75524
dc.description.abstractThe Korean Microlensing Telescope Network (KMTNet) will consist of three 1.6 m telescopes each with a 4 deg2field of view (FoV) and will be dedicated to monitoring the Galactic Bulge to detect exoplanets via gravitational microlensing. KMTNet's combination of aperture size, FoV, cadence, and longitudinal coverage will provide a unique opportunity to probe exoplanet demographics in an unbiased way. Here we present simulations that optimize the observing strategy for and predict the planetary yields of KMTNet. We find preferences for four target fields located in the central Bulge and an exposure time of texp= 120 s, leading to the detection of ∼2200 microlensing events per year. We estimate the planet detection rates for planets with mass and separation across the ranges 0.1 ≤ Mp/M⊕≤ 1000 and 0.4 ≤ a/AU ≤ 16, respectively. Normalizing these rates to the cool-planet mass function of Cassan et al., we predict KMTNet will be approximately uniformly sensitive to planets with mass 5 ≤ Mp/M⊕≤ 1000 and will detect ∼20 planets per year per dex in mass across that range. For lower-mass planets with mass 0.1 ≤ Mp/M⊕< 5, we predict KMTNet will detect ∼10 planets per year. We also compute the yields KMTNet will obtain for free-floating planets (FFPs) and predict KMTNet will detect ∼1 Earth-mass FFP per year, assuming an underlying population of one such planet per star in the Galaxy. Lastly, we investigate the dependence of these detection rates on the number of observatories, the photometric precision limit, and optimistic assumptions regarding seeing, throughput, and flux measurement uncertainties.
dc.publisherIOP Publishing
dc.sourceAstrophysical Journal, The
dc.titleOptimal survey strategies and predicted planet yields for the Korean microlensing telescope network
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume794
dc.date.issued2014
local.identifier.absfor030600 - PHYSICAL CHEMISTRY (INCL. STRUCTURAL)
local.identifier.ariespublicationU3488905xPUB4658
local.type.statusPublished Version
local.contributor.affiliationHenderson, Calen B., The Ohio State University
local.contributor.affiliationGaudi, B S, Ohio State University
local.contributor.affiliationHan, C, Chungbuk National University
local.contributor.affiliationSkowron, Jan, Ohio State University
local.contributor.affiliationPenny, Matthew P., The Ohio State University
local.contributor.affiliationNataf, David, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationGould, A, Ohio State University
local.description.embargo2037-12-31
local.bibliographicCitation.issue1
local.bibliographicCitation.startpage1
local.bibliographicCitation.lastpage29
local.identifier.doi10.1088/0004-637X/794/1/52
dc.date.updated2015-12-11T09:06:26Z
local.identifier.scopusID2-s2.0-84907477087
local.identifier.thomsonID000342581200052
CollectionsANU Research Publications

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