Ertel, S.S.ErtelDefrère, D.D.DefrèreHinz, P.P.HinzMennesson, B.B.MennessonKennedy, G. M.G. M.KennedyDanchi, W. C.W. C.DanchiGelino, C.C.GelinoHill, J. M.J. M.HillHoffmann, W. F.W. F.HoffmannMazoyer, J.J.MazoyerRieke, G.G.RiekeShannon, A.A.ShannonStapelfeldt, K.K.StapelfeldtSpalding, E.E.SpaldingStone, J. M.J. M.StoneVaz, A.A.VazWeinberger, A. J.A. J.WeinbergerWillems, P.P.WillemsAbsil, O.O.AbsilArbo, P.P.ArboBailey, V. P.V. P.BaileyBeichman, C.C.BeichmanBryden, G.G.BrydenDowney, E. C.E. C.DowneyDurney, O.O.DurneyESPOSITO, SimoneSimoneESPOSITOGaspar, A.A.GasparGrenz, P.P.GrenzHaniff, C. A.C. A.HaniffLeisenring, J. M.J. M.LeisenringMarion, L.L.MarionMcMahon, T. J.T. J.McMahonMillan-Gabet, R.R.Millan-GabetMontoya, M.M.MontoyaMorzinski, K. M.K. M.MorzinskiPerera, S.S.PereraPINNA, EnricoEnricoPINNAPott, J. -U.J. -U.PottPower, J.J.PowerPUGLISI, Alfio TimothyAlfio TimothyPUGLISIRoberge, A.A.RobergeSerabyn, E.E.SerabynSkemer, A. J.A. J.SkemerSu, K. Y. L.K. Y. L.SuVaitheeswaran, V.V.VaitheeswaranWyatt, M. C.M. C.Wyatt2025-03-042025-03-0420200004-6256http://hdl.handle.net/20.500.12386/36419The Large Binocular Telescope Interferometer (LBTI) enables nulling interferometric observations across the N band (8 to 13 μm) to suppress a star's bright light and probe for faint circumstellar emission. We present and statistically analyze the results from the LBTI/Hunt for Observable Signatures of Terrestrial Systems survey for exozodiacal dust. By comparing our measurements to model predictions based on the solar zodiacal dust in the N band, we estimate a 1σ median sensitivity of 23 zodis times the solar system dust surface density in its habitable zone (HZ; 23 zodis) for early-type stars and 48 zodis for Sun-like stars, where 1 zodi is the surface density of HZ dust in the solar system. Of the 38 stars observed, 10 show significant excess. A clear correlation of our detections with the presence of cold dust in the systems was found, but none with the stellar spectral type or age. The majority of Sun-like stars have relatively low HZ dust levels (best-fit median: 3 zodis, 1σ upper limit: 9 zodis, 95% confidence: 27 zodis based on our N band measurements), while ∼20% are significantly more dusty. The solar system's HZ dust content is consistent with being typical. Our median HZ dust level would not be a major limitation to the direct imaging search for Earth-like exoplanets, but more precise constraints are still required, in particular to evaluate the impact of exozodiacal dust for the spectroscopic characterization of imaged exo-Earth candidates.STAMPAenArticle10.3847/1538-3881/ab78172-s2.0-85086447669https://iopscience.iop.org/article/10.3847/1538-3881/ab7817https://api.elsevier.com/content/abstract/scopus_id/850864476692020AJ....159..177EFIS/05 - ASTRONOMIA E ASTROFISICA