Exploring the Brown Dwarf Desert C
Astronomy & Astrophysics manuscript no. draft c ESO 2018 March 5, 2018 MOA-2007-BLG-197: Exploring the brown dwarf desert C. Ranc1; 35, A. Cassan1; 35, M. D. Albrow2; 35, D. Kubas1; 35, I. A. Bond3; 36, V. Batista1; 35, J.-P. Beaulieu1; 35, D. P. Bennett4; 36, M. Dominik5; 35, Subo Dong6; 37, P. Fouqué7; 8; 35, A. Gould9; 37, J. Greenhilly10; 35, U. G. Jørgensen11; 35, N. Kains12; 5; 35, J. Menzies13; 35, T. Sumi14; 36, E. Bachelet15; 35, C. Coutures1; 35, S. Dieters1; 35, D. Dominis Prester16; 35, J. Donatowicz17; 35, B. S. Gaudi9; 37, C. Han18; 37, M. Hundertmark5; 11, K. Horne5; 35, S. R. Kane19; 35, C.-U. Lee20; 37, J.-B. Marquette1; 35, B.-G. Park20; 37, K. R. Pollard2; 35, K. C. Sahu12; 35, R. Street21; 35, Y. Tsapras21; 22; 35, J. Wambsganss22; 35, A. Williams23; 24; 35, M. Zub22; 35, F. Abe25; 36, A. Fukui26; 36, Y. Itow25; 36, K. Masuda25; 36, Y. Matsubara25; 36, Y. Muraki25; 36, K. Ohnishi27; 36, N. Rattenbury28; 36, To. Saito29; 36, D. J. Sullivan30; 36, W. L. Sweatman31; 36, P. J. Tristram32; 36, P. C. M. Yock33; 36, and A. Yonehara34; 36 (Affiliations can be found after the references) Received <date> / accepted <date> ABSTRACT We present the analysis of MOA-2007-BLG-197Lb, the first brown dwarf companion to a Sun-like star detected through gravitational microlensing. The event was alerted and followed-up photometrically by a network of telescopes from the PLANET, MOA, and µFUN collaborations, and observed at high angular resolution using the NaCo instrument at the VLT.
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