OGLE-2018-BLG-1185b: A Low-mass Microlensing Planet Orbiting a Low-mass Dwarf

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OGLE-2018-BLG-1185b : A Low-mass Microlensing Planet Orbiting a Low-mass Dwarf. / Kondo, Iona; Yee, Jennifer C.; Bennett, David P.; Sumi, Takahiro; Koshimoto, Naoki; Bond, Ian A.; Gould, Andrew; Udalski, Andrzej; Shvartzvald, Yossi; Jung, Youn Kil; Zang, Weicheng; Bozza, Valerio; Bachelet, Etienne; Hundertmark, Markus P. G.; Rattenbury, Nicholas J.; Abe, F.; Barry, R.; Bhattacharya, A.; Donachie, M.; Fukui, A.; Fujii, H.; Hirao, Y.; Silva, S. Ishitani; Itow, Y.; Kirikawa, R.; Li, M. C. A.; Matsubara, Y.; Miyazaki, S.; Muraki, Y.; Olmschenk, G.; Ranc, C.; Satoh, Y.; Shoji, H.; Suzuki, D.; Tanaka, Y.; Tristram, P. J.; Yamawaki, T.; Yonehara, A.; Mroz, P.; Poleski, R.; Skowron, J.; Szymanski, M. K.; Kim, H-W; Kim, S-L; Lee, C-U; Lee, Y.; Jorgensen, U. G.; Skottfelt, J.; Dib, S.; Fujii, Y.; MOA Collaboration; OGLE Collaboration; KMTNet Collaboration; Spitzer Team; LCO Follow-Up Team; MiNDSTEp Collaboration; ROME REA Project Team.

In: Astronomical Journal, Vol. 162, No. 2, 77, 08.2021.

Research output: Contribution to journal › Journal article › Research › peer-review

Harvard

Kondo, I, Yee, JC, Bennett, DP, Sumi, T, Koshimoto, N, Bond, IA, Gould, A, Udalski, A, Shvartzvald, Y, Jung, YK, Zang, W, Bozza, V, Bachelet, E, Hundertmark, MPG, Rattenbury, NJ, Abe, F, Barry, R, Bhattacharya, A, Donachie, M, Fukui, A, Fujii, H, Hirao, Y, Silva, SI, Itow, Y, Kirikawa, R, Li, MCA, Matsubara, Y, Miyazaki, S, Muraki, Y, Olmschenk, G, Ranc, C, Satoh, Y, Shoji, H, Suzuki, D, Tanaka, Y, Tristram, PJ, Yamawaki, T, Yonehara, A, Mroz, P, Poleski, R, Skowron, J, Szymanski, MK, Kim, H-W, Kim, S-L, Lee, C-U, Lee, Y, Jorgensen, UG, Skottfelt, J, Dib, S, Fujii, Y, MOA Collaboration, OGLE Collaboration, KMTNet Collaboration, Spitzer Team, LCO Follow-Up Team, MiNDSTEp Collaboration & ROME REA Project Team 2021, 'OGLE-2018-BLG-1185b: A Low-mass Microlensing Planet Orbiting a Low-mass Dwarf', Astronomical Journal, vol. 162, no. 2, 77. https://doi.org/10.3847/1538-3881/ac00ba

APA

Kondo, I., Yee, J. C., Bennett, D. P., Sumi, T., Koshimoto, N., Bond, I. A., Gould, A., Udalski, A., Shvartzvald, Y., Jung, Y. K., Zang, W., Bozza, V., Bachelet, E., Hundertmark, M. P. G., Rattenbury, N. J., Abe, F., Barry, R., Bhattacharya, A., Donachie, M., ... ROME REA Project Team (2021). OGLE-2018-BLG-1185b: A Low-mass Microlensing Planet Orbiting a Low-mass Dwarf. Astronomical Journal, 162(2), [77]. https://doi.org/10.3847/1538-3881/ac00ba

Vancouver

Kondo I, Yee JC, Bennett DP, Sumi T, Koshimoto N, Bond IA et al. OGLE-2018-BLG-1185b: A Low-mass Microlensing Planet Orbiting a Low-mass Dwarf. Astronomical Journal. 2021 Aug;162(2). 77. https://doi.org/10.3847/1538-3881/ac00ba

Author

Kondo, Iona ; Yee, Jennifer C. ; Bennett, David P. ; Sumi, Takahiro ; Koshimoto, Naoki ; Bond, Ian A. ; Gould, Andrew ; Udalski, Andrzej ; Shvartzvald, Yossi ; Jung, Youn Kil ; Zang, Weicheng ; Bozza, Valerio ; Bachelet, Etienne ; Hundertmark, Markus P. G. ; Rattenbury, Nicholas J. ; Abe, F. ; Barry, R. ; Bhattacharya, A. ; Donachie, M. ; Fukui, A. ; Fujii, H. ; Hirao, Y. ; Silva, S. Ishitani ; Itow, Y. ; Kirikawa, R. ; Li, M. C. A. ; Matsubara, Y. ; Miyazaki, S. ; Muraki, Y. ; Olmschenk, G. ; Ranc, C. ; Satoh, Y. ; Shoji, H. ; Suzuki, D. ; Tanaka, Y. ; Tristram, P. J. ; Yamawaki, T. ; Yonehara, A. ; Mroz, P. ; Poleski, R. ; Skowron, J. ; Szymanski, M. K. ; Kim, H-W ; Kim, S-L ; Lee, C-U ; Lee, Y. ; Jorgensen, U. G. ; Skottfelt, J. ; Dib, S. ; Fujii, Y. ; MOA Collaboration ; OGLE Collaboration ; KMTNet Collaboration ; Spitzer Team ; LCO Follow-Up Team ; MiNDSTEp Collaboration ; ROME REA Project Team. / OGLE-2018-BLG-1185b : A Low-mass Microlensing Planet Orbiting a Low-mass Dwarf. In: Astronomical Journal. 2021 ; Vol. 162, No. 2.

Bibtex

@article{7e6855e1560f4f32927dd29160ee1a7d,
title = "OGLE-2018-BLG-1185b: A Low-mass Microlensing Planet Orbiting a Low-mass Dwarf",
abstract = "We report an analysis of the planetary microlensing event OGLE-2018-BLG-1185, which was observed by a large number of ground-based telescopes and by the Spitzer Space Telescope. The ground-based light curve indicates a low planet-host star mass ratio of q = (6.9 +/- 0.2) x 10(-5), which is near the peak of the wide-orbit exoplanet mass-ratio distribution. We estimate the host star and planet masses with a Bayesian analysis using the measured angular Einstein radius under the assumption that stars of all masses have an equal probability of hosting the planet. The flux variation observed by Spitzer is marginal, but still places a constraint on the microlens parallax. Imposing a conservative constraint that this flux variation should be Delta f (Spz) < 4 instrumental flux units yields a host mass of M-host = 0.37(-0.21)(+0.35) M-circle dot and a planet mass of m(p) = 8.4(-4.7)(+7.9) M-circle plus. A Bayesian analysis including the full parallax constraint from Spitzer suggests smaller host star and planet masses of M-host = 0.091(-0.018)(+0.064) M-circle dot m(p) = 2.1(-0.4)(+1.5) M-circle plus, respectively. Future high-resolution imaging observations with the Hubble Space Telescope or Extremely Large Telescope could distinguish between these two scenarios and help reveal the planetary system properties in more detail.",
keywords = "GRAVITATIONAL LENSING EXPERIMENT, SPITZER PARALLAX, GALACTIC BULGE, GIANT PLANETS, COLD NEPTUNE, HOST, EVENTS, PHOTOMETRY, ACCRETION, SYSTEMS",
author = "Iona Kondo and Yee, {Jennifer C.} and Bennett, {David P.} and Takahiro Sumi and Naoki Koshimoto and Bond, {Ian A.} and Andrew Gould and Andrzej Udalski and Yossi Shvartzvald and Jung, {Youn Kil} and Weicheng Zang and Valerio Bozza and Etienne Bachelet and Hundertmark, {Markus P. G.} and Rattenbury, {Nicholas J.} and F. Abe and R. Barry and A. Bhattacharya and M. Donachie and A. Fukui and H. Fujii and Y. Hirao and Silva, {S. Ishitani} and Y. Itow and R. Kirikawa and Li, {M. C. A.} and Y. Matsubara and S. Miyazaki and Y. Muraki and G. Olmschenk and C. Ranc and Y. Satoh and H. Shoji and D. Suzuki and Y. Tanaka and Tristram, {P. J.} and T. Yamawaki and A. Yonehara and P. Mroz and R. Poleski and J. Skowron and Szymanski, {M. K.} and H-W Kim and S-L Kim and C-U Lee and Y. Lee and Jorgensen, {U. G.} and J. Skottfelt and S. Dib and Y. Fujii and {MOA Collaboration} and {OGLE Collaboration} and {KMTNet Collaboration} and {Spitzer Team} and {LCO Follow-Up Team} and {MiNDSTEp Collaboration} and {ROME REA Project Team}",
year = "2021",
month = aug,
doi = "10.3847/1538-3881/ac00ba",
language = "English",
volume = "162",
journal = "The Astronomical Journal",
issn = "0004-6256",
publisher = "Institute of Physics Publishing, Inc",
number = "2",

}

RIS

TY - JOUR

T1 - OGLE-2018-BLG-1185b

T2 - A Low-mass Microlensing Planet Orbiting a Low-mass Dwarf

AU - Kondo, Iona

AU - Yee, Jennifer C.

AU - Bennett, David P.

AU - Sumi, Takahiro

AU - Koshimoto, Naoki

AU - Bond, Ian A.

AU - Gould, Andrew

AU - Udalski, Andrzej

AU - Shvartzvald, Yossi

AU - Jung, Youn Kil

AU - Zang, Weicheng

AU - Bozza, Valerio

AU - Bachelet, Etienne

AU - Hundertmark, Markus P. G.

AU - Rattenbury, Nicholas J.

AU - Abe, F.

AU - Barry, R.

AU - Bhattacharya, A.

AU - Donachie, M.

AU - Fukui, A.

AU - Fujii, H.

AU - Hirao, Y.

AU - Silva, S. Ishitani

AU - Itow, Y.

AU - Kirikawa, R.

AU - Li, M. C. A.

AU - Matsubara, Y.

AU - Miyazaki, S.

AU - Muraki, Y.

AU - Olmschenk, G.

AU - Ranc, C.

AU - Satoh, Y.

AU - Shoji, H.

AU - Suzuki, D.

AU - Tanaka, Y.

AU - Tristram, P. J.

AU - Yamawaki, T.

AU - Yonehara, A.

AU - Mroz, P.

AU - Poleski, R.

AU - Skowron, J.

AU - Szymanski, M. K.

AU - Kim, H-W

AU - Kim, S-L

AU - Lee, C-U

AU - Lee, Y.

AU - Jorgensen, U. G.

AU - Skottfelt, J.

AU - Dib, S.

AU - Fujii, Y.

AU - MOA Collaboration

AU - OGLE Collaboration

AU - KMTNet Collaboration

AU - Spitzer Team

AU - LCO Follow-Up Team

AU - MiNDSTEp Collaboration

AU - ROME REA Project Team

PY - 2021/8

Y1 - 2021/8

N2 - We report an analysis of the planetary microlensing event OGLE-2018-BLG-1185, which was observed by a large number of ground-based telescopes and by the Spitzer Space Telescope. The ground-based light curve indicates a low planet-host star mass ratio of q = (6.9 +/- 0.2) x 10(-5), which is near the peak of the wide-orbit exoplanet mass-ratio distribution. We estimate the host star and planet masses with a Bayesian analysis using the measured angular Einstein radius under the assumption that stars of all masses have an equal probability of hosting the planet. The flux variation observed by Spitzer is marginal, but still places a constraint on the microlens parallax. Imposing a conservative constraint that this flux variation should be Delta f (Spz) < 4 instrumental flux units yields a host mass of M-host = 0.37(-0.21)(+0.35) M-circle dot and a planet mass of m(p) = 8.4(-4.7)(+7.9) M-circle plus. A Bayesian analysis including the full parallax constraint from Spitzer suggests smaller host star and planet masses of M-host = 0.091(-0.018)(+0.064) M-circle dot m(p) = 2.1(-0.4)(+1.5) M-circle plus, respectively. Future high-resolution imaging observations with the Hubble Space Telescope or Extremely Large Telescope could distinguish between these two scenarios and help reveal the planetary system properties in more detail.

AB - We report an analysis of the planetary microlensing event OGLE-2018-BLG-1185, which was observed by a large number of ground-based telescopes and by the Spitzer Space Telescope. The ground-based light curve indicates a low planet-host star mass ratio of q = (6.9 +/- 0.2) x 10(-5), which is near the peak of the wide-orbit exoplanet mass-ratio distribution. We estimate the host star and planet masses with a Bayesian analysis using the measured angular Einstein radius under the assumption that stars of all masses have an equal probability of hosting the planet. The flux variation observed by Spitzer is marginal, but still places a constraint on the microlens parallax. Imposing a conservative constraint that this flux variation should be Delta f (Spz) < 4 instrumental flux units yields a host mass of M-host = 0.37(-0.21)(+0.35) M-circle dot and a planet mass of m(p) = 8.4(-4.7)(+7.9) M-circle plus. A Bayesian analysis including the full parallax constraint from Spitzer suggests smaller host star and planet masses of M-host = 0.091(-0.018)(+0.064) M-circle dot m(p) = 2.1(-0.4)(+1.5) M-circle plus, respectively. Future high-resolution imaging observations with the Hubble Space Telescope or Extremely Large Telescope could distinguish between these two scenarios and help reveal the planetary system properties in more detail.

KW - GRAVITATIONAL LENSING EXPERIMENT

KW - SPITZER PARALLAX

KW - GALACTIC BULGE

KW - GIANT PLANETS

KW - COLD NEPTUNE

KW - HOST

KW - EVENTS

KW - PHOTOMETRY

KW - ACCRETION

KW - SYSTEMS

U2 - 10.3847/1538-3881/ac00ba

DO - 10.3847/1538-3881/ac00ba

M3 - Journal article

VL - 162

JO - The Astronomical Journal

JF - The Astronomical Journal

SN - 0004-6256

IS - 2

M1 - 77

ER -

ID: 275998091