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, Wyrzykowski, P. Pietrukowicz, F. Abe, I. A. Bond & 50 others 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, Khalid Al-Subai, V. Bozza, D. M. Bramich, P. Browne, M. Dominik, K. Horne, M. Hundertmark, S. Ipatov, N. Kains, C. Liebig, C. Snodgrass, I. A. Steele, R. A. Street

Research output: Contribution to journalArticle

32 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 languageEnglish
Article number38
JournalAstrophysical Journal
Volume778
Issue number1
DOIs
Publication statusPublished - 20 Nov 2013
Externally publishedYes

Fingerprint

planetary mass
old field
mass ratios
protoplanetary disks
planetary systems
Jupiter (planet)
accretion disks
planets
stars
Jupiter
planet
accretion

Keywords

  • brown dwarfs
  • gravitational lensing: micro
  • planetary systems

ASJC Scopus subject areas

  • Space and Planetary Science
  • Astronomy and Astrophysics

Cite this

Han, C., Jung, Y. K., Udalski, A., Sumi, T., Gaudi, B. S., Gould, A., ... 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), [38]. https://doi.org/10.1088/0004-637X/778/1/38

Microlensing discovery of a tight, low-mass-ratio planetary-mass object around an old field brown dwarf. / 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; Pietrukowicz, P.; Abe, F.; Bond, I. A.; Botzler, C. S.; Chote, P.; Freeman, M.; Fukui, A.; Furusawa, K.; Harris, P.; Itow, Y.; Ling, C. H.; Masuda, K.; Matsubara, Y.; Muraki, Y.; Ohnishi, K.; Rattenbury, N. J.; Saito, To; Sullivan, D. J.; Sweatman, W. L.; Suzuki, D.; Tristram, P. J.; Wada, K.; Yock, P. C M; Batista, V.; Christie, G.; Choi, J. Y.; Depoy, D. L.; Dong, Subo; Hwang, K. H.; Kavka, A.; Lee, C. U.; Monard, L. A G; Natusch, T.; Ngan, H.; Park, H.; Pogge, R. W.; Porritt, I.; Shin, I. G.; Tan, T. G.; Yee, J. C.; Al-Subai, Khalid; Bozza, V.; Bramich, D. M.; Browne, P.; Dominik, M.; Horne, K.; Hundertmark, M.; Ipatov, S.; Kains, N.; Liebig, C.; Snodgrass, C.; Steele, I. A.; Street, R. A.

In: Astrophysical Journal, Vol. 778, No. 1, 38, 20.11.2013.

Research output: Contribution to journalArticle

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, 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, JY, Depoy, DL, Dong, S, Hwang, KH, Kavka, A, Lee, CU, Monard, LAG, Natusch, T, Ngan, H, Park, H, Pogge, RW, Porritt, I, Shin, IG, Tan, TG, Yee, JC, Al-Subai, K, 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
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 ; Pietrukowicz, P. ; Abe, F. ; Bond, I. A. ; Botzler, C. S. ; Chote, P. ; Freeman, M. ; Fukui, A. ; Furusawa, K. ; Harris, P. ; Itow, Y. ; Ling, C. H. ; Masuda, K. ; Matsubara, Y. ; Muraki, Y. ; Ohnishi, K. ; Rattenbury, N. J. ; Saito, To ; Sullivan, D. J. ; Sweatman, W. L. ; Suzuki, D. ; Tristram, P. J. ; Wada, K. ; Yock, P. C M ; Batista, V. ; Christie, G. ; Choi, J. Y. ; Depoy, D. L. ; Dong, Subo ; Hwang, K. H. ; Kavka, A. ; Lee, C. U. ; Monard, L. A G ; Natusch, T. ; Ngan, H. ; Park, H. ; Pogge, R. W. ; Porritt, I. ; Shin, I. G. ; Tan, T. G. ; Yee, J. C. ; Al-Subai, Khalid ; Bozza, V. ; Bramich, D. M. ; Browne, P. ; Dominik, M. ; Horne, K. ; Hundertmark, M. ; Ipatov, S. ; Kains, N. ; Liebig, C. ; Snodgrass, C. ; Steele, I. A. ; Street, R. A. / Microlensing discovery of a tight, low-mass-ratio planetary-mass object around an old field brown dwarf. In: Astrophysical Journal. 2013 ; Vol. 778, No. 1.
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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.",
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AU - Jung, Y. K.

AU - Udalski, A.

AU - Sumi, T.

AU - Gaudi, B. S.

AU - Gould, A.

AU - Bennett, D. P.

AU - Tsapras, Y.

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AU - Wyrzykowski,

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.

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AU - Choi, J. Y.

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AU - Lee, C. U.

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AU - Ipatov, S.

AU - Kains, N.

AU - Liebig, C.

AU - Snodgrass, C.

AU - Steele, I. A.

AU - Street, R. A.

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