Microlensing discovery of a tight, low-mass-ratio planetary-mass object around an old field brown dwarf

C. Han; Y. K. Jung; A. Udalski; T. Sumi; B. S. Gaudi; A. Gould; D. P. Bennett; Y. Tsapras; M. K. Szymański; M. Kubiak; G. Pietrzyński; I. Soszyński; J. Skowron; S. Kozłowski; R. Poleski; K. Ulaczyk; Ł. Wyrzykowski; P. Pietrukowicz; F. Abe; I. A. Bond; C. S. Botzler; P. Chote; M. Freeman; A. Fukui; K. Furusawa; P. Harris; Y. Itow; C. H. Ling; K. Masuda; Y. Matsubara; Y. Muraki; K. Ohnishi; N. J. Rattenbury; To. Saito; D. J. Sullivan; W. L. Sweatman; D. Suzuki; P. J. Tristram; K. Wada; P. C. M. Yock; V. Batista; G. Christie; J.-Y. Choi; D. L. DePoy; Subo Dong; K.-H. Hwang; A. Kavka; C.-U. Lee; L. A. G. Monard; T. Natusch; H. Ngan; H. Park; R. W. Pogge; I. Porritt; I.-G. Shin; T. G. Tan; J. C. Yee; K. A. Alsubai; V. Bozza; D. M. Bramich; Paul Browne; M. Dominik; K. Horne; M. Hundertmark; S. Ipatov; Noé Kains; C. Liebig; C. Snodgrass; I. A. Steele; R. A. Street

doi:10.1088/0004-637X/778/1/38

Microlensing discovery of a tight, low-mass-ratio planetary-mass object around an old field brown dwarf

C. Han, Y. K. Jung, A. Udalski, T. Sumi, B. S. Gaudi, A. Gould, D. P. Bennett, Y. Tsapras, M. K. Szymański, M. Kubiak, G. Pietrzyński, I. Soszyński, J. Skowron, S. Kozłowski, R. Poleski, K. Ulaczyk, Ł. Wyrzykowski, P. Pietrukowicz, F. Abe, I. A. BondC. S. Botzler, P. Chote, M. Freeman, A. Fukui, K. Furusawa, P. Harris, Y. Itow, C. H. Ling, K. Masuda, Y. Matsubara, Y. Muraki, K. Ohnishi, N. J. Rattenbury, To. Saito, D. J. Sullivan, W. L. Sweatman, D. Suzuki, P. J. Tristram, K. Wada, P. C. M. Yock, V. Batista, G. Christie, J.-Y. Choi, D. L. DePoy, Subo Dong, K.-H. Hwang, A. Kavka, C.-U. Lee, L. A. G. Monard, T. Natusch, H. Ngan, H. Park, R. W. Pogge, I. Porritt, I.-G. Shin, T. G. Tan, J. C. Yee, K. A. Alsubai, V. Bozza, D. M. Bramich, Paul Browne, M. Dominik, K. Horne, M. Hundertmark, S. Ipatov, Noé Kains, C. Liebig, C. Snodgrass, I. A. Steele, R. A. Street

School of Physics and Astronomy

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55 Citations (Scopus)

Abstract

Observations of accretion disks around young brown dwarfs (BDs) have led to the speculation that they may form planetary systems similar to normal stars. While there have been several detections of planetary-mass objects around BDs (2MASS 1207-3932 and 2MASS 0441-2301), these companions have relatively large mass ratios and projected separations, suggesting that they formed in a manner analogous to stellar binaries. We present the discovery of a planetary-mass object orbiting a field BD via gravitational microlensing, OGLE-2012-BLG-0358Lb. The system is a low secondary/primary mass ratio (0.080 ± 0.001), relatively tightly separated (~0.87 AU) binary composed of a planetary-mass object with 1.9 ± 0.2 Jupiter masses orbiting a BD with a mass 0.022 M_☉. The relatively small mass ratio and separation suggest that the companion may have formed in a protoplanetary disk around the BD host in a manner analogous to planets.

Original language	English
Article number	38
Journal	Astrophysical Journal
Volume	778
Issue number	1
Early online date	31 Oct 2013
DOIs	https://doi.org/10.1088/0004-637X/778/1/38
Publication status	Published - 20 Nov 2013

Keywords

Brown dwarfs
Gravitational lensing: micro
Planetary systems

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Dominik_2013_TAJ_Microlensing
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AGN Echo mapping: AGN Echo Mapping and Mineral Clouds in Alien Atmospheres
Horne, K. D. (PI)
Science & Technology Facilities Council
1/04/12 → 31/08/12
Project: Standard
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

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Han, C., Jung, Y. K., Udalski, A., Sumi, T., Gaudi, B. S., Gould, A., Bennett, D. P., Tsapras, Y., Szymański, M. K., Kubiak, M., Pietrzyński, G., Soszyński, I., Skowron, J., Kozłowski, S., Poleski, R., Ulaczyk, K., Wyrzykowski, Ł., Pietrukowicz, P., Abe, F., ... Street, R. A. (2013). Microlensing discovery of a tight, low-mass-ratio planetary-mass object around an old field brown dwarf. Astrophysical Journal, 778(1), Article 38. https://doi.org/10.1088/0004-637X/778/1/38

@article{c51407af2d034d2bb31311e27f10c74e,

title = "Microlensing discovery of a tight, low-mass-ratio planetary-mass object around an old field brown dwarf",

abstract = "Observations of accretion disks around young brown dwarfs (BDs) have led to the speculation that they may form planetary systems similar to normal stars. While there have been several detections of planetary-mass objects around BDs (2MASS 1207-3932 and 2MASS 0441-2301), these companions have relatively large mass ratios and projected separations, suggesting that they formed in a manner analogous to stellar binaries. We present the discovery of a planetary-mass object orbiting a field BD via gravitational microlensing, OGLE-2012-BLG-0358Lb. The system is a low secondary/primary mass ratio (0.080 ± 0.001), relatively tightly separated (~0.87 AU) binary composed of a planetary-mass object with 1.9 ± 0.2 Jupiter masses orbiting a BD with a mass 0.022 M☉. The relatively small mass ratio and separation suggest that the companion may have formed in a protoplanetary disk around the BD host in a manner analogous to planets.",

keywords = "Brown dwarfs, Gravitational lensing: micro, Planetary systems",

author = "C. Han and Jung, {Y. K.} and A. Udalski and T. Sumi and Gaudi, {B. S.} and A. Gould and Bennett, {D. P.} and Y. Tsapras and Szyma{\'n}ski, {M. K.} and M. Kubiak and G. Pietrzy{\'n}ski and I. Soszy{\'n}ski and J. Skowron and S. Koz{\l}owski and R. Poleski and K. Ulaczyk and {\L}. Wyrzykowski and P. Pietrukowicz and F. Abe and Bond, {I. A.} and Botzler, {C. S.} and P. Chote and M. Freeman and A. Fukui and K. Furusawa and P. Harris and Y. Itow and Ling, {C. H.} and K. Masuda and Y. Matsubara and Y. Muraki and K. Ohnishi and Rattenbury, {N. J.} and To. Saito and Sullivan, {D. J.} and Sweatman, {W. L.} and D. Suzuki and Tristram, {P. J.} and K. Wada and Yock, {P. C. M.} and V. Batista and G. Christie and J.-Y. Choi and DePoy, {D. L.} and Subo Dong and K.-H. Hwang and A. Kavka and C.-U. Lee and Monard, {L. A. G.} and T. Natusch and H. Ngan and H. Park and Pogge, {R. W.} and I. Porritt and I.-G. Shin and Tan, {T. G.} and Yee, {J. C.} and Alsubai, {K. A.} and V. Bozza and Bramich, {D. M.} and Paul Browne and M. Dominik and K. Horne and M. Hundertmark and S. Ipatov and No{\'e} Kains and C. Liebig and C. Snodgrass and Steele, {I. A.} and Street, {R. A.}",

note = " K.A., D.B., M.D., K.H., M.H., S.I., C.L., R.S., and Y.T. are supported by the NPRP grant NPRP-09-476-1-78 from the Qatar National Research Fund (a member of the Qatar Foundation). M.D. is a Royal Society University Research Fellow. K.H. is a Royal Society Leverhulme Trust Senior Research Fellow.",

year = "2013",

month = nov,

day = "20",

doi = "10.1088/0004-637X/778/1/38",

language = "English",

volume = "778",

journal = "Astrophysical Journal",

issn = "0004-637X",

publisher = "American Astronomical Society",

number = "1",

}

Han, C, Jung, YK, Udalski, A, Sumi, T, Gaudi, BS, Gould, A, Bennett, DP, Tsapras, Y, Szymański, MK, Kubiak, M, Pietrzyński, G, Soszyński, I, Skowron, J, Kozłowski, S, Poleski, R, Ulaczyk, K, Wyrzykowski, Ł, Pietrukowicz, P, Abe, F, Bond, IA, Botzler, CS, Chote, P, Freeman, M, Fukui, A, Furusawa, K, Harris, P, Itow, Y, Ling, CH, Masuda, K, Matsubara, Y, Muraki, Y, Ohnishi, K, Rattenbury, NJ, Saito, T, Sullivan, DJ, Sweatman, WL, Suzuki, D, Tristram, PJ, Wada, K, Yock, PCM, Batista, V, Christie, G, Choi, J-Y, DePoy, DL, Dong, S, Hwang, K-H, Kavka, A, Lee, C-U, Monard, LAG, Natusch, T, Ngan, H, Park, H, Pogge, RW, Porritt, I, Shin, I-G, Tan, TG, Yee, JC, Alsubai, KA, Bozza, V, Bramich, DM, Browne, P, Dominik, M , Horne, K, Hundertmark, M, Ipatov, S, Kains, N, Liebig, C, Snodgrass, C, Steele, IA & Street, RA 2013, 'Microlensing discovery of a tight, low-mass-ratio planetary-mass object around an old field brown dwarf', Astrophysical Journal, vol. 778, no. 1, 38. https://doi.org/10.1088/0004-637X/778/1/38

TY - JOUR

T1 - Microlensing discovery of a tight, low-mass-ratio planetary-mass object around an old field brown dwarf

AU - Han, C.

AU - Jung, Y. K.

AU - Udalski, A.

AU - Sumi, T.

AU - Gaudi, B. S.

AU - Gould, A.

AU - Bennett, D. P.

AU - Tsapras, Y.

AU - Szymański, M. K.

AU - Kubiak, M.

AU - Pietrzyński, G.

AU - Soszyński, I.

AU - Skowron, J.

AU - Kozłowski, S.

AU - Poleski, R.

AU - Ulaczyk, K.

AU - Wyrzykowski, Ł.

AU - Pietrukowicz, P.

AU - Abe, F.

AU - Bond, I. A.

AU - Botzler, C. S.

AU - Chote, P.

AU - Freeman, M.

AU - Fukui, A.

AU - Furusawa, K.

AU - Harris, P.

AU - Itow, Y.

AU - Ling, C. H.

AU - Masuda, K.

AU - Matsubara, Y.

AU - Muraki, Y.

AU - Ohnishi, K.

AU - Rattenbury, N. J.

AU - Saito, To.

AU - Sullivan, D. J.

AU - Sweatman, W. L.

AU - Suzuki, D.

AU - Tristram, P. J.

AU - Wada, K.

AU - Yock, P. C. M.

AU - Batista, V.

AU - Christie, G.

AU - Choi, J.-Y.

AU - DePoy, D. L.

AU - Dong, Subo

AU - Hwang, K.-H.

AU - Kavka, A.

AU - Lee, C.-U.

AU - Monard, L. A. G.

AU - Natusch, T.

AU - Ngan, H.

AU - Park, H.

AU - Pogge, R. W.

AU - Porritt, I.

AU - Shin, I.-G.

AU - Tan, T. G.

AU - Yee, J. C.

AU - Alsubai, K. A.

AU - Bozza, V.

AU - Bramich, D. M.

AU - Browne, Paul

AU - Dominik, M.

AU - Horne, K.

AU - Hundertmark, M.

AU - Ipatov, S.

AU - Kains, Noé

AU - Liebig, C.

AU - Snodgrass, C.

AU - Steele, I. A.

AU - Street, R. A.

N1 - K.A., D.B., M.D., K.H., M.H., S.I., C.L., R.S., and Y.T. are supported by the NPRP grant NPRP-09-476-1-78 from the Qatar National Research Fund (a member of the Qatar Foundation). M.D. is a Royal Society University Research Fellow. K.H. is a Royal Society Leverhulme Trust Senior Research Fellow.

PY - 2013/11/20

Y1 - 2013/11/20

N2 - Observations of accretion disks around young brown dwarfs (BDs) have led to the speculation that they may form planetary systems similar to normal stars. While there have been several detections of planetary-mass objects around BDs (2MASS 1207-3932 and 2MASS 0441-2301), these companions have relatively large mass ratios and projected separations, suggesting that they formed in a manner analogous to stellar binaries. We present the discovery of a planetary-mass object orbiting a field BD via gravitational microlensing, OGLE-2012-BLG-0358Lb. The system is a low secondary/primary mass ratio (0.080 ± 0.001), relatively tightly separated (~0.87 AU) binary composed of a planetary-mass object with 1.9 ± 0.2 Jupiter masses orbiting a BD with a mass 0.022 M☉. The relatively small mass ratio and separation suggest that the companion may have formed in a protoplanetary disk around the BD host in a manner analogous to planets.

AB - Observations of accretion disks around young brown dwarfs (BDs) have led to the speculation that they may form planetary systems similar to normal stars. While there have been several detections of planetary-mass objects around BDs (2MASS 1207-3932 and 2MASS 0441-2301), these companions have relatively large mass ratios and projected separations, suggesting that they formed in a manner analogous to stellar binaries. We present the discovery of a planetary-mass object orbiting a field BD via gravitational microlensing, OGLE-2012-BLG-0358Lb. The system is a low secondary/primary mass ratio (0.080 ± 0.001), relatively tightly separated (~0.87 AU) binary composed of a planetary-mass object with 1.9 ± 0.2 Jupiter masses orbiting a BD with a mass 0.022 M☉. The relatively small mass ratio and separation suggest that the companion may have formed in a protoplanetary disk around the BD host in a manner analogous to planets.

KW - Brown dwarfs

KW - Gravitational lensing: micro

KW - Planetary systems

U2 - 10.1088/0004-637X/778/1/38

DO - 10.1088/0004-637X/778/1/38

M3 - Article

SN - 0004-637X

VL - 778

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 1

M1 - 38

ER -

Microlensing discovery of a tight, low-mass-ratio planetary-mass object around an old field brown dwarf

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Keywords

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AGN Echo mapping: AGN Echo Mapping and Mineral Clouds in Alien Atmospheres

Astrophysics at St Andrews:2012 - 2014: Astrophysics at St Andrews: 2012 - 2014

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