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dc.contributor.authorErtel, S
dc.contributor.authorDefrère, D
dc.contributor.authorHinz, P
dc.contributor.authorMennesson, B
dc.contributor.authorKennedy, GM
dc.contributor.authorDanchi, WC
dc.contributor.authorGelino, C
dc.contributor.authorHill, JM
dc.contributor.authorHoffmann, WF
dc.contributor.authorRieke, G
dc.contributor.authorShannon, A
dc.contributor.authorSpalding, E
dc.contributor.authorStone, Jordan M
dc.contributor.authorVaz, A
dc.contributor.authorWeinberger, AJ
dc.contributor.authorWillems, P
dc.contributor.authorAbsil, O
dc.contributor.authorArbo, P
dc.contributor.authorBailey, VP
dc.contributor.authorBeichman, C
dc.contributor.authorBryden, G
dc.contributor.authorDowney, EC
dc.contributor.authorDurney, O
dc.contributor.authorEsposito, S
dc.contributor.authorGaspar, A
dc.contributor.authorGrenz, P
dc.contributor.authorHaniff, CA
dc.contributor.authorLeisenring, JM
dc.contributor.authorMarion, L
dc.contributor.authorMcMahon, TJ
dc.contributor.authorMillan-Gabet, R
dc.contributor.authorMontoya, M
dc.contributor.authorMorzinski, KM
dc.contributor.authorPinna, E
dc.contributor.authorPower, J
dc.contributor.authorPuglisi, A
dc.contributor.authorRoberge, A
dc.contributor.authorSerabyn, E
dc.contributor.authorSkemer, AJ
dc.contributor.authorStapelfeldt, K
dc.contributor.authorSu, KYL
dc.contributor.authorVaitheeswaran, V
dc.contributor.authorWyatt, MC
dc.date.accessioned2018-07-02T10:31:51Z
dc.date.available2018-07-02T10:31:51Z
dc.date.issued2018
dc.identifier.issn1538-3881
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/277691
dc.description.abstractThe HOSTS (Hunt for Observable Signatures of Terrestrial Systems) survey searches for dust near the habitable zones (HZs) around nearby, bright main sequence stars. We use nulling interferometry in N band to suppress the bright stellar light and to probe for low levels of HZ dust around the 30 stars observed so far. Our overall detection rate is 18%, including four new detections, among which are the first three around Sun-like stars and the first two around stars without any previously known circumstellar dust. The inferred occurrence rates are comparable for early type and Sun-like stars, but decrease from 60 (+16/-21)% for stars with previously detected cold dust to 8 (+10/-3)% for stars without such excess, confirming earlier results at higher sensitivity. For completed observations on individual stars, our sensitivity is five to ten times better than previous results. Assuming a lognormal excess luminosity function, we put upper limits on the median HZ dust level of 13 zodis (95% confidence) for a sample of stars without cold dust and of 26 zodis when focussing on Sun-like stars without cold dust. However, our data suggest that a more complex luminosity function may be more appropriate. For stars without detectable LBTI excess, our upper limits are almost reduced by a factor of two, demonstrating the strength of LBTI target vetting for future exo-Earth imaging missions. Our statistics are so far limited and extending the survey is critical to inform the design of future exo-Earth imaging surveys.
dc.publisherAmerican Astronomical Society
dc.titleThe HOSTS Survey—Exozodiacal Dust Measurements for 30 Stars
dc.typeArticle
prism.number194
prism.publicationNameThe Astronomical Journal
prism.volume155
dc.identifier.doi10.17863/CAM.25029
dcterms.dateAccepted2018-03-13
rioxxterms.versionofrecord10.3847/1538-3881/aab717
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserved
rioxxterms.licenseref.startdate2018-03-13
dc.contributor.orcidKennedy, Grant [0000-0001-6831-7547]
dc.contributor.orcidHaniff, Christopher [0000-0001-8726-5797]
dc.contributor.orcidWyatt, Mark [0000-0001-9064-5598]
dc.identifier.eissn1538-3881
dc.publisher.urlhttp://dx.doi.org/10.3847/1538-3881/aab717
rioxxterms.typeJournal Article/Review
pubs.funder-project-idScience and Technology Facilities Council (ST/M001172/1)
pubs.funder-project-idScience and Technology Facilities Council (ST/N000927/1)
cam.issuedOnline2018-04-17
cam.orpheus.successThu Jan 30 13:04:40 GMT 2020 - The item has an open VoR version.
rioxxterms.freetoread.startdate2100-01-01


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