MICROLENSING BINARIES WITH CANDIDATE BROWN DWARF COMPANIONS

I. -G. Shin; C. Han; A. Gould; A. Udalski; T. Sumi; M. Dominik; J. -P. Beaulieu; Y. Tsapras; V. Bozza; M. K. Szymanski; M. Kubiak; I. Soszynski; G. Pietrzynski; R. Poleski; K. Ulaczyk; P. Pietrukowicz; S. Kozlowski; J. Skowron; L. Wyrzykowski; F. Abe; D. P. Bennett; I. A. Bond; C. S. Botzler; M. Freeman; A. Fukui; K. Furusawa; F. Hayashi; J. B. Hearnshaw; S. Hosaka; Y. Itow; K. Kamiya; P. M. Kilmartin; S. Kobara; A. Korpela; W. Lin; C. H. Ling; S. Makita; K. Masuda; Y. Matsubara; N. Miyake; Y. Muraki; M. Nagaya; K. Nishimoto; K. Ohnishi; T. Okumura; K. Omori; Y. C. Perrott; N. Rattenbury; To. Saito; L. Skuljan; D. J. Sullivan; D. Suzuki; W. L. Sweatman; P. J. Tristram; K. Wada; P. C. M. Yock; G. W. Christie; D. L. Depoy; S. Dong; A. Gal-Yam; B. S. Gaudi; L. -W. Hung; J. Janczak; S. Kaspi; D. Maoz; J. McCormick; D. McGregor; D. Moorhouse; J. A. Munoz; T. Natusch; C. Nelson; R. W. Pogge; T. -G. Tan; D. Polishook; Y. Shvartzvald; A. Shporer; G. Thornley; U. Malamud; J. C. Yee; J. -Y. Choi; Y. -K. Jung; H. Park; C. -U. Lee; B. -G. Park; J. -R. Koo; D. Bajek; D. M. Bramich; P. Browne; K. Horne; S. Ipatov; C. Snodgrass; I. Steele; R. Street; K. A. Alsubai; M. J. Burgdorf; S. Calchi Novati; P. Dodds; S. Dreizler; X. -S. Fang; F. Grundahl; C. -H. Gu; S. Hardis; K. Harpsoe; T. C. Hinse; M. Hundertmark; J. Jessen-Hansen; U. G. Jorgensen; N. Kains; E. Kerins; C. Liebig; M. Lund; M. Lundkvist; L. Mancini; M. Mathiasen; A. Hornstrup; M. T. Penny; S. Proft; S. Rahvar; D. Ricci; G. Scarpetta; J. Skottfelt; J. Southworth; J. Surdej; J. Tregloan-Reed; O. Wertz; F. Zimmer; M. D. Albrow; V. Batista; S. Brillant; J. A. R. Caldwell; J. J. Calitz; A. Cassan; A. Cole; K. H. Cook; E. Corrales; Ch. Coutures; S. Dieters; D. Dominis Prester; J. Donatowicz; P. Fouque; J. Greenhill; K. Hill; M. Hoffman; S. R. Kane; D. Kubas; J. -B. Marquette; R. Martin; P. Meintjes; J. Menzies; K. R. Pollard; K. C. Sahu; J. Wambsganss; A. Williams; C. Vinter; M. Zub

doi:10.1088/0004-637X/760/2/116

MICROLENSING BINARIES WITH CANDIDATE BROWN DWARF COMPANIONS

I. -G. Shin, C. Han^*, A. Gould, A. Udalski, T. Sumi, M. Dominik, J. -P. Beaulieu, Y. Tsapras, V. Bozza, M. K. Szymanski, M. Kubiak, I. Soszynski, G. Pietrzynski, R. Poleski, K. Ulaczyk, P. Pietrukowicz, S. Kozlowski, J. Skowron, L. Wyrzykowski, F. AbeD. P. Bennett, I. A. Bond, C. S. Botzler, M. Freeman, A. Fukui, K. Furusawa, F. Hayashi, J. B. Hearnshaw, S. Hosaka, Y. Itow, K. Kamiya, P. M. Kilmartin, S. Kobara, A. Korpela, W. Lin, C. H. Ling, S. Makita, K. Masuda, Y. Matsubara, N. Miyake, Y. Muraki, M. Nagaya, K. Nishimoto, K. Ohnishi, T. Okumura, K. Omori, Y. C. Perrott, N. Rattenbury, To. Saito, L. Skuljan, D. J. Sullivan, D. Suzuki, W. L. Sweatman, P. J. Tristram, K. Wada, P. C. M. Yock, G. W. Christie, D. L. Depoy, S. Dong, A. Gal-Yam, B. S. Gaudi, L. -W. Hung, J. Janczak, S. Kaspi, D. Maoz, J. McCormick, D. McGregor, D. Moorhouse, J. A. Munoz, T. Natusch, C. Nelson, R. W. Pogge, T. -G. Tan, D. Polishook, Y. Shvartzvald, A. Shporer, G. Thornley, U. Malamud, J. C. Yee, J. -Y. Choi, Y. -K. Jung, H. Park, C. -U. Lee, B. -G. Park, J. -R. Koo, D. Bajek, D. M. Bramich, P. Browne, K. Horne, S. Ipatov, C. Snodgrass, I. Steele, R. Street, K. A. Alsubai, M. J. Burgdorf, S. Calchi Novati, P. Dodds, S. Dreizler, X. -S. Fang, F. Grundahl, C. -H. Gu, S. Hardis, K. Harpsoe, T. C. Hinse, M. Hundertmark, J. Jessen-Hansen, U. G. Jorgensen, N. Kains, E. Kerins, C. Liebig, M. Lund, M. Lundkvist, L. Mancini, M. Mathiasen, A. Hornstrup, M. T. Penny, S. Proft, S. Rahvar, D. Ricci, G. Scarpetta, J. Skottfelt, J. Southworth, J. Surdej, J. Tregloan-Reed, O. Wertz, F. Zimmer, M. D. Albrow, V. Batista, S. Brillant, J. A. R. Caldwell, J. J. Calitz, A. Cassan, A. Cole, K. H. Cook, E. Corrales, Ch. Coutures, S. Dieters, D. Dominis Prester, J. Donatowicz, P. Fouque, J. Greenhill, K. Hill, M. Hoffman, S. R. Kane, D. Kubas, J. -B. Marquette, R. Martin, P. Meintjes, J. Menzies, K. R. Pollard, K. C. Sahu, J. Wambsganss, A. Williams, C. Vinter, M. Zub

^*Corresponding author for this work

School of Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

Abstract

Brown dwarfs are important objects because they may provide a missing link between stars and planets, two populations that have dramatically different formation histories. In this paper, we present the candidate binaries with brown dwarf companions that are found by analyzing binary microlensing events discovered during the 2004-2011 observation seasons. Based on the low mass ratio criterion of q <0.2, we found seven candidate events: OGLE-2004-BLG-035, OGLE-2004-BLG-039, OGLE-2007-BLG-006, OGLE-2007-BLG-399/MOA-2007-BLG-334, MOA-2011-BLG-104/OGLE-2011-BLG-0172, MOA-2011-BLG-149, and MOA-201-BLG-278/OGLE-2011-BLG-012N. Among them, we are able to confirm that the companions of the lenses of MOA-2011-BLG-104/OGLE-2011-BLG-0172 and MOA-2011-BLG-149 are brown dwarfs by determining the mass of the lens based on the simultaneous measurement of the Einstein radius and the lens parallax. The measured masses of the brown dwarf companions are 0.02 +/- 0.01 M-circle dot and 0.019 +/- 0.002 M-circle dot for MOA-2011-BLG-104/OGLE-2011-BLG-0172 and MOA-2011-BLG-149, respectively, and both companions are orbiting low-mass M dwarf host stars. More microlensing brown dwarfs are expected to be detected as the number of lensing events with well-covered light curves increases with new-generation searches.

Original language	English
Article number	116
Number of pages	10
Journal	Astrophysical Journal
Volume	760
Issue number	2
DOIs	https://doi.org/10.1088/0004-637X/760/2/116
Publication status	Published - 1 Dec 2012

Keywords

binaries: general
brown dwarfs
gravitational lensing: micro
DIFFERENCE IMAGE-ANALYSIS
III EWS DATABASE
GALACTIC BULGE
GRAVITATIONAL LENS
OPTICAL DEPTH
LIGHT CURVES
STARS
DISCOVERY
PLANETS
SEARCH

Access to Document

10.1088/0004-637X/760/2/116

Astrophysics at St Andrews:2012 - 2014: Astrophysics at St Andrews: 2012 - 2014
Horne, K. D. (PI)
Science & Technology Facilities Council
1/10/11 → 31/03/12
Project: Standard

Cite this

Shin, I. .-G., Han, C., Gould, A., Udalski, A., Sumi, T., Dominik, M., Beaulieu, J. .-P., Tsapras, Y., Bozza, V., Szymanski, M. K., Kubiak, M., Soszynski, I., Pietrzynski, G., Poleski, R., Ulaczyk, K., Pietrukowicz, P., Kozlowski, S., Skowron, J., Wyrzykowski, L., ... Zub, M. (2012). MICROLENSING BINARIES WITH CANDIDATE BROWN DWARF COMPANIONS. Astrophysical Journal, 760(2), Article 116. https://doi.org/10.1088/0004-637X/760/2/116

@article{bb8b9ac626394348a2639250f80ecc58,

title = "MICROLENSING BINARIES WITH CANDIDATE BROWN DWARF COMPANIONS",

abstract = "Brown dwarfs are important objects because they may provide a missing link between stars and planets, two populations that have dramatically different formation histories. In this paper, we present the candidate binaries with brown dwarf companions that are found by analyzing binary microlensing events discovered during the 2004-2011 observation seasons. Based on the low mass ratio criterion of q <0.2, we found seven candidate events: OGLE-2004-BLG-035, OGLE-2004-BLG-039, OGLE-2007-BLG-006, OGLE-2007-BLG-399/MOA-2007-BLG-334, MOA-2011-BLG-104/OGLE-2011-BLG-0172, MOA-2011-BLG-149, and MOA-201-BLG-278/OGLE-2011-BLG-012N. Among them, we are able to confirm that the companions of the lenses of MOA-2011-BLG-104/OGLE-2011-BLG-0172 and MOA-2011-BLG-149 are brown dwarfs by determining the mass of the lens based on the simultaneous measurement of the Einstein radius and the lens parallax. The measured masses of the brown dwarf companions are 0.02 +/- 0.01 M-circle dot and 0.019 +/- 0.002 M-circle dot for MOA-2011-BLG-104/OGLE-2011-BLG-0172 and MOA-2011-BLG-149, respectively, and both companions are orbiting low-mass M dwarf host stars. More microlensing brown dwarfs are expected to be detected as the number of lensing events with well-covered light curves increases with new-generation searches.",

keywords = "binaries: general, brown dwarfs, gravitational lensing: micro, DIFFERENCE IMAGE-ANALYSIS, III EWS DATABASE, GALACTIC BULGE, GRAVITATIONAL LENS, OPTICAL DEPTH, LIGHT CURVES, STARS, DISCOVERY, PLANETS, SEARCH",

author = "Shin, {I. -G.} and C. Han and A. Gould and A. Udalski and T. Sumi and M. Dominik and Beaulieu, {J. -P.} and Y. Tsapras and V. Bozza and Szymanski, {M. K.} and M. Kubiak and I. Soszynski and G. Pietrzynski and R. Poleski and K. Ulaczyk and P. Pietrukowicz and S. Kozlowski and J. Skowron and L. Wyrzykowski and F. Abe and Bennett, {D. P.} and Bond, {I. A.} and Botzler, {C. S.} and M. Freeman and A. Fukui and K. Furusawa and F. Hayashi and Hearnshaw, {J. B.} and S. Hosaka and Y. Itow and K. Kamiya and Kilmartin, {P. M.} and S. Kobara and A. Korpela and W. Lin and Ling, {C. H.} and S. Makita and K. Masuda and Y. Matsubara and N. Miyake and Y. Muraki and M. Nagaya and K. Nishimoto and K. Ohnishi and T. Okumura and K. Omori and Perrott, {Y. C.} and N. Rattenbury and To. Saito and L. Skuljan and Sullivan, {D. J.} and D. Suzuki and Sweatman, {W. L.} and Tristram, {P. J.} and K. Wada and Yock, {P. C. M.} and Christie, {G. W.} and Depoy, {D. L.} and S. Dong and A. Gal-Yam and Gaudi, {B. S.} and Hung, {L. -W.} and J. Janczak and S. Kaspi and D. Maoz and J. McCormick and D. McGregor and D. Moorhouse and Munoz, {J. A.} and T. Natusch and C. Nelson and Pogge, {R. W.} and Tan, {T. -G.} and D. Polishook and Y. Shvartzvald and A. Shporer and G. Thornley and U. Malamud and Yee, {J. C.} and Choi, {J. -Y.} and Jung, {Y. -K.} and H. Park and Lee, {C. -U.} and Park, {B. -G.} and Koo, {J. -R.} and D. Bajek and Bramich, {D. M.} and P. Browne and K. Horne and S. Ipatov and C. Snodgrass and I. Steele and R. Street and Alsubai, {K. A.} and Burgdorf, {M. J.} and {Calchi Novati}, S. and P. Dodds and S. Dreizler and Fang, {X. -S.} and F. Grundahl and Gu, {C. -H.} and S. Hardis and K. Harpsoe and Hinse, {T. C.} and M. Hundertmark and J. Jessen-Hansen and Jorgensen, {U. G.} and N. Kains and E. Kerins and C. Liebig and M. Lund and M. Lundkvist and L. Mancini and M. Mathiasen and A. Hornstrup and Penny, {M. T.} and S. Proft and S. Rahvar and D. Ricci and G. Scarpetta and J. Skottfelt and J. Southworth and J. Surdej and J. Tregloan-Reed and O. Wertz and F. Zimmer and Albrow, {M. D.} and V. Batista and S. Brillant and Caldwell, {J. A. R.} and Calitz, {J. J.} and A. Cassan and A. Cole and Cook, {K. H.} and E. Corrales and Ch. Coutures and S. Dieters and Prester, {D. Dominis} and J. Donatowicz and P. Fouque and J. Greenhill and K. Hill and M. Hoffman and Kane, {S. R.} and D. Kubas and Marquette, {J. -B.} and R. Martin and P. Meintjes and J. Menzies and Pollard, {K. R.} and Sahu, {K. C.} and J. Wambsganss and A. Williams and C. Vinter and M. Zub",

year = "2012",

month = dec,

day = "1",

doi = "10.1088/0004-637X/760/2/116",

language = "English",

volume = "760",

journal = "Astrophysical Journal",

issn = "0004-637X",

publisher = "American Astronomical Society",

number = "2",

}

Shin, I-G, Han, C, Gould, A, Udalski, A, Sumi, T, Dominik, M, Beaulieu, J-P, Tsapras, Y, Bozza, V, Szymanski, MK, Kubiak, M, Soszynski, I, Pietrzynski, G, Poleski, R, Ulaczyk, K, Pietrukowicz, P, Kozlowski, S, Skowron, J, Wyrzykowski, L, Abe, F, Bennett, DP, Bond, IA, Botzler, CS, Freeman, M, Fukui, A, Furusawa, K, Hayashi, F, Hearnshaw, JB, Hosaka, S, Itow, Y, Kamiya, K, Kilmartin, PM, Kobara, S, Korpela, A, Lin, W, Ling, CH, Makita, S, Masuda, K, Matsubara, Y, Miyake, N, Muraki, Y, Nagaya, M, Nishimoto, K, Ohnishi, K, Okumura, T, Omori, K, Perrott, YC, Rattenbury, N, Saito, T, Skuljan, L, Sullivan, DJ, Suzuki, D, Sweatman, WL, Tristram, PJ, Wada, K, Yock, PCM, Christie, GW, Depoy, DL, Dong, S, Gal-Yam, A, Gaudi, BS, Hung, L-W, Janczak, J, Kaspi, S, Maoz, D, McCormick, J, McGregor, D, Moorhouse, D, Munoz, JA, Natusch, T, Nelson, C, Pogge, RW, Tan, T-G, Polishook, D, Shvartzvald, Y, Shporer, A, Thornley, G, Malamud, U, Yee, JC, Choi, J-Y, Jung, Y-K, Park, H, Lee, C-U, Park, B-G, Koo, J-R, Bajek, D, Bramich, DM, Browne, P, Horne, K, Ipatov, S, Snodgrass, C, Steele, I, Street, R, Alsubai, KA, Burgdorf, MJ, Calchi Novati, S, Dodds, P, Dreizler, S, Fang, X-S, Grundahl, F, Gu, C-H, Hardis, S, Harpsoe, K, Hinse, TC, Hundertmark, M, Jessen-Hansen, J, Jorgensen, UG, Kains, N, Kerins, E, Liebig, C, Lund, M, Lundkvist, M, Mancini, L, Mathiasen, M, Hornstrup, A, Penny, MT, Proft, S, Rahvar, S, Ricci, D, Scarpetta, G, Skottfelt, J, Southworth, J, Surdej, J, Tregloan-Reed, J, Wertz, O, Zimmer, F, Albrow, MD, Batista, V, Brillant, S, Caldwell, JAR, Calitz, JJ, Cassan, A, Cole, A, Cook, KH, Corrales, E, Coutures, C, Dieters, S, Prester, DD, Donatowicz, J, Fouque, P, Greenhill, J, Hill, K, Hoffman, M, Kane, SR, Kubas, D, Marquette, J-B, Martin, R, Meintjes, P, Menzies, J, Pollard, KR, Sahu, KC, Wambsganss, J, Williams, A, Vinter, C & Zub, M 2012, 'MICROLENSING BINARIES WITH CANDIDATE BROWN DWARF COMPANIONS', Astrophysical Journal, vol. 760, no. 2, 116. https://doi.org/10.1088/0004-637X/760/2/116

TY - JOUR

T1 - MICROLENSING BINARIES WITH CANDIDATE BROWN DWARF COMPANIONS

AU - Shin, I. -G.

AU - Han, C.

AU - Gould, A.

AU - Udalski, A.

AU - Sumi, T.

AU - Dominik, M.

AU - Beaulieu, J. -P.

AU - Tsapras, Y.

AU - Bozza, V.

AU - Szymanski, M. K.

AU - Kubiak, M.

AU - Soszynski, I.

AU - Pietrzynski, G.

AU - Poleski, R.

AU - Ulaczyk, K.

AU - Pietrukowicz, P.

AU - Kozlowski, S.

AU - Skowron, J.

AU - Wyrzykowski, L.

AU - Abe, F.

AU - Bennett, D. P.

AU - Bond, I. A.

AU - Botzler, C. S.

AU - Freeman, M.

AU - Fukui, A.

AU - Furusawa, K.

AU - Hayashi, F.

AU - Hearnshaw, J. B.

AU - Hosaka, S.

AU - Itow, Y.

AU - Kamiya, K.

AU - Kilmartin, P. M.

AU - Kobara, S.

AU - Korpela, A.

AU - Lin, W.

AU - Ling, C. H.

AU - Makita, S.

AU - Masuda, K.

AU - Matsubara, Y.

AU - Miyake, N.

AU - Muraki, Y.

AU - Nagaya, M.

AU - Nishimoto, K.

AU - Ohnishi, K.

AU - Okumura, T.

AU - Omori, K.

AU - Perrott, Y. C.

AU - Rattenbury, N.

AU - Saito, To.

AU - Skuljan, L.

AU - Sullivan, D. J.

AU - Suzuki, D.

AU - Sweatman, W. L.

AU - Tristram, P. J.

AU - Wada, K.

AU - Yock, P. C. M.

AU - Christie, G. W.

AU - Depoy, D. L.

AU - Dong, S.

AU - Gal-Yam, A.

AU - Gaudi, B. S.

AU - Hung, L. -W.

AU - Janczak, J.

AU - Kaspi, S.

AU - Maoz, D.

AU - McCormick, J.

AU - McGregor, D.

AU - Moorhouse, D.

AU - Munoz, J. A.

AU - Natusch, T.

AU - Nelson, C.

AU - Pogge, R. W.

AU - Tan, T. -G.

AU - Polishook, D.

AU - Shvartzvald, Y.

AU - Shporer, A.

AU - Thornley, G.

AU - Malamud, U.

AU - Yee, J. C.

AU - Choi, J. -Y.

AU - Jung, Y. -K.

AU - Park, H.

AU - Lee, C. -U.

AU - Park, B. -G.

AU - Koo, J. -R.

AU - Bajek, D.

AU - Bramich, D. M.

AU - Browne, P.

AU - Horne, K.

AU - Ipatov, S.

AU - Snodgrass, C.

AU - Steele, I.

AU - Street, R.

AU - Alsubai, K. A.

AU - Burgdorf, M. J.

AU - Calchi Novati, S.

AU - Dodds, P.

AU - Dreizler, S.

AU - Fang, X. -S.

AU - Grundahl, F.

AU - Gu, C. -H.

AU - Hardis, S.

AU - Harpsoe, K.

AU - Hinse, T. C.

AU - Hundertmark, M.

AU - Jessen-Hansen, J.

AU - Jorgensen, U. G.

AU - Kains, N.

AU - Kerins, E.

AU - Liebig, C.

AU - Lund, M.

AU - Lundkvist, M.

AU - Mancini, L.

AU - Mathiasen, M.

AU - Hornstrup, A.

AU - Penny, M. T.

AU - Proft, S.

AU - Rahvar, S.

AU - Ricci, D.

AU - Scarpetta, G.

AU - Skottfelt, J.

AU - Southworth, J.

AU - Surdej, J.

AU - Tregloan-Reed, J.

AU - Wertz, O.

AU - Zimmer, F.

AU - Albrow, M. D.

AU - Batista, V.

AU - Brillant, S.

AU - Caldwell, J. A. R.

AU - Calitz, J. J.

AU - Cassan, A.

AU - Cole, A.

AU - Cook, K. H.

AU - Corrales, E.

AU - Coutures, Ch.

AU - Dieters, S.

AU - Prester, D. Dominis

AU - Donatowicz, J.

AU - Fouque, P.

AU - Greenhill, J.

AU - Hill, K.

AU - Hoffman, M.

AU - Kane, S. R.

AU - Kubas, D.

AU - Marquette, J. -B.

AU - Martin, R.

AU - Meintjes, P.

AU - Menzies, J.

AU - Pollard, K. R.

AU - Sahu, K. C.

AU - Wambsganss, J.

AU - Williams, A.

AU - Vinter, C.

AU - Zub, M.

PY - 2012/12/1

Y1 - 2012/12/1

N2 - Brown dwarfs are important objects because they may provide a missing link between stars and planets, two populations that have dramatically different formation histories. In this paper, we present the candidate binaries with brown dwarf companions that are found by analyzing binary microlensing events discovered during the 2004-2011 observation seasons. Based on the low mass ratio criterion of q <0.2, we found seven candidate events: OGLE-2004-BLG-035, OGLE-2004-BLG-039, OGLE-2007-BLG-006, OGLE-2007-BLG-399/MOA-2007-BLG-334, MOA-2011-BLG-104/OGLE-2011-BLG-0172, MOA-2011-BLG-149, and MOA-201-BLG-278/OGLE-2011-BLG-012N. Among them, we are able to confirm that the companions of the lenses of MOA-2011-BLG-104/OGLE-2011-BLG-0172 and MOA-2011-BLG-149 are brown dwarfs by determining the mass of the lens based on the simultaneous measurement of the Einstein radius and the lens parallax. The measured masses of the brown dwarf companions are 0.02 +/- 0.01 M-circle dot and 0.019 +/- 0.002 M-circle dot for MOA-2011-BLG-104/OGLE-2011-BLG-0172 and MOA-2011-BLG-149, respectively, and both companions are orbiting low-mass M dwarf host stars. More microlensing brown dwarfs are expected to be detected as the number of lensing events with well-covered light curves increases with new-generation searches.

AB - Brown dwarfs are important objects because they may provide a missing link between stars and planets, two populations that have dramatically different formation histories. In this paper, we present the candidate binaries with brown dwarf companions that are found by analyzing binary microlensing events discovered during the 2004-2011 observation seasons. Based on the low mass ratio criterion of q <0.2, we found seven candidate events: OGLE-2004-BLG-035, OGLE-2004-BLG-039, OGLE-2007-BLG-006, OGLE-2007-BLG-399/MOA-2007-BLG-334, MOA-2011-BLG-104/OGLE-2011-BLG-0172, MOA-2011-BLG-149, and MOA-201-BLG-278/OGLE-2011-BLG-012N. Among them, we are able to confirm that the companions of the lenses of MOA-2011-BLG-104/OGLE-2011-BLG-0172 and MOA-2011-BLG-149 are brown dwarfs by determining the mass of the lens based on the simultaneous measurement of the Einstein radius and the lens parallax. The measured masses of the brown dwarf companions are 0.02 +/- 0.01 M-circle dot and 0.019 +/- 0.002 M-circle dot for MOA-2011-BLG-104/OGLE-2011-BLG-0172 and MOA-2011-BLG-149, respectively, and both companions are orbiting low-mass M dwarf host stars. More microlensing brown dwarfs are expected to be detected as the number of lensing events with well-covered light curves increases with new-generation searches.

KW - binaries: general

KW - brown dwarfs

KW - gravitational lensing: micro

KW - DIFFERENCE IMAGE-ANALYSIS

KW - III EWS DATABASE

KW - GALACTIC BULGE

KW - GRAVITATIONAL LENS

KW - OPTICAL DEPTH

KW - LIGHT CURVES

KW - STARS

KW - DISCOVERY

KW - PLANETS

KW - SEARCH

U2 - 10.1088/0004-637X/760/2/116

DO - 10.1088/0004-637X/760/2/116

M3 - Article

SN - 0004-637X

VL - 760

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 2

M1 - 116

ER -

MICROLENSING BINARIES WITH CANDIDATE BROWN DWARF COMPANIONS

Abstract

Keywords

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