DISCOVERY of A GAS GIANT PLANET in MICROLENSING EVENT OGLE-2014-BLG-1760

A. Bhattacharya, D. P. Bennett, I. A. Bond, T. Sumi, A. Udalski, R. Street, Y. Tsapras, F. Abe, M. Freeman, A. Fukui, Y. Hirao, Y. Itow, N. Koshimoto, M. C A Li, C. H. Ling, K. Masuda, Y. Matsubara, Y. Muraki, M. Nagakane, K. Ohnishi & 28 others N. Rattenbury, T. Saito, A. Sharan, D. J. Sullivan, D. Suzuki, P. J. Tristram, J. Skowron, M. K. Szymański, I. Soszyński, R. Poleski, P. Mróz, S. Kozlowski, P. Pietrukowicz, K. Ulaczyk, L. Wyrzykowski, E. Bachelet, D. M. Bramich, G. D'Ago, M. Dominik, R. Figuera Jaimes, K. Horne, M. Hundertmark, N. Kains, J. Menzies, R. Schmidt, C. Snodgrass, I. A. Steele, J. Wambsganss

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

We present the analysis of the planetary microlensing event OGLE-2014-BLG-1760, which shows a strong lightcurve signal due to the presence of a Jupiter mass ratio planet. One unusual feature of this event is that the source star is quite blue, with V - I = 1.48± 0.08. This is marginally consistent with a source star in the Galactic bulge, but it could possibly indicate a young source star on the far side of the disk. Assuming a bulge source, we perform a Bayesian analysis assuming a standard Galactic model, and this indicates that the planetary system resides in or near the Galactic bulge at DL = 6.9 ± 1.1 kpc. It also indicates a host-star mass of M∗ = 0.51-0.28 +0.44, a planet mass of Mp = 0.56-0.26 +0.34MJ, and a projected star-planet separation of a =1.75-0.33 +0.34 au. The lens-source relative proper motion is μrel = 6.5 ± 1.1 mas yr-1. The lens (and stellar host star) is estimated to be very faint compared to the source star, so it is most likely that it can be detected only when the lens and source stars start to separate. Due to the relatively high relative proper motion, the lens and source will be resolved to about ∼46 mas in 6-8 yr after the peak magnification. So, by 2020-2022, we can hope to detect the lens star with deep, high-resolution images.

Original languageEnglish
Article number140
JournalAstronomical Journal
Volume152
Issue number5
DOIs
Publication statusPublished - 1 Nov 2016
Externally publishedYes

Fingerprint

planet
stars
lenses
Bayesian analysis
image resolution
Jupiter
planets
galactic bulge
proper motion
planetary systems
magnification
Jupiter (planet)
mass ratios
high resolution
analysis
young

Keywords

  • gravitational lensing: micro
  • planetary systems

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Bhattacharya, A., Bennett, D. P., Bond, I. A., Sumi, T., Udalski, A., Street, R., ... Wambsganss, J. (2016). DISCOVERY of A GAS GIANT PLANET in MICROLENSING EVENT OGLE-2014-BLG-1760. Astronomical Journal, 152(5), [140]. https://doi.org/10.3847/0004-6256/152/5/140

DISCOVERY of A GAS GIANT PLANET in MICROLENSING EVENT OGLE-2014-BLG-1760. / Bhattacharya, A.; Bennett, D. P.; Bond, I. A.; Sumi, T.; Udalski, A.; Street, R.; Tsapras, Y.; Abe, F.; Freeman, M.; Fukui, A.; Hirao, Y.; Itow, Y.; Koshimoto, N.; Li, M. C A; Ling, C. H.; Masuda, K.; Matsubara, Y.; Muraki, Y.; Nagakane, M.; Ohnishi, K.; Rattenbury, N.; Saito, T.; Sharan, A.; Sullivan, D. J.; Suzuki, D.; Tristram, P. J.; Skowron, J.; Szymański, M. K.; Soszyński, I.; Poleski, R.; Mróz, P.; Kozlowski, S.; Pietrukowicz, P.; Ulaczyk, K.; Wyrzykowski, L.; Bachelet, E.; Bramich, D. M.; D'Ago, G.; Dominik, M.; Figuera Jaimes, R.; Horne, K.; Hundertmark, M.; Kains, N.; Menzies, J.; Schmidt, R.; Snodgrass, C.; Steele, I. A.; Wambsganss, J.

In: Astronomical Journal, Vol. 152, No. 5, 140, 01.11.2016.

Research output: Contribution to journalArticle

Bhattacharya, A, Bennett, DP, Bond, IA, Sumi, T, Udalski, A, Street, R, Tsapras, Y, Abe, F, Freeman, M, Fukui, A, Hirao, Y, Itow, Y, Koshimoto, N, Li, MCA, Ling, CH, Masuda, K, Matsubara, Y, Muraki, Y, Nagakane, M, Ohnishi, K, Rattenbury, N, Saito, T, Sharan, A, Sullivan, DJ, Suzuki, D, Tristram, PJ, Skowron, J, Szymański, MK, Soszyński, I, Poleski, R, Mróz, P, Kozlowski, S, Pietrukowicz, P, Ulaczyk, K, Wyrzykowski, L, Bachelet, E, Bramich, DM, D'Ago, G, Dominik, M, Figuera Jaimes, R, Horne, K, Hundertmark, M, Kains, N, Menzies, J, Schmidt, R, Snodgrass, C, Steele, IA & Wambsganss, J 2016, 'DISCOVERY of A GAS GIANT PLANET in MICROLENSING EVENT OGLE-2014-BLG-1760', Astronomical Journal, vol. 152, no. 5, 140. https://doi.org/10.3847/0004-6256/152/5/140
Bhattacharya A, Bennett DP, Bond IA, Sumi T, Udalski A, Street R et al. DISCOVERY of A GAS GIANT PLANET in MICROLENSING EVENT OGLE-2014-BLG-1760. Astronomical Journal. 2016 Nov 1;152(5). 140. https://doi.org/10.3847/0004-6256/152/5/140
Bhattacharya, A. ; Bennett, D. P. ; Bond, I. A. ; Sumi, T. ; Udalski, A. ; Street, R. ; Tsapras, Y. ; Abe, F. ; Freeman, M. ; Fukui, A. ; Hirao, Y. ; Itow, Y. ; Koshimoto, N. ; Li, M. C A ; Ling, C. H. ; Masuda, K. ; Matsubara, Y. ; Muraki, Y. ; Nagakane, M. ; Ohnishi, K. ; Rattenbury, N. ; Saito, T. ; Sharan, A. ; Sullivan, D. J. ; Suzuki, D. ; Tristram, P. J. ; Skowron, J. ; Szymański, M. K. ; Soszyński, I. ; Poleski, R. ; Mróz, P. ; Kozlowski, S. ; Pietrukowicz, P. ; Ulaczyk, K. ; Wyrzykowski, L. ; Bachelet, E. ; Bramich, D. M. ; D'Ago, G. ; Dominik, M. ; Figuera Jaimes, R. ; Horne, K. ; Hundertmark, M. ; Kains, N. ; Menzies, J. ; Schmidt, R. ; Snodgrass, C. ; Steele, I. A. ; Wambsganss, J. / DISCOVERY of A GAS GIANT PLANET in MICROLENSING EVENT OGLE-2014-BLG-1760. In: Astronomical Journal. 2016 ; Vol. 152, No. 5.
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abstract = "We present the analysis of the planetary microlensing event OGLE-2014-BLG-1760, which shows a strong lightcurve signal due to the presence of a Jupiter mass ratio planet. One unusual feature of this event is that the source star is quite blue, with V - I = 1.48± 0.08. This is marginally consistent with a source star in the Galactic bulge, but it could possibly indicate a young source star on the far side of the disk. Assuming a bulge source, we perform a Bayesian analysis assuming a standard Galactic model, and this indicates that the planetary system resides in or near the Galactic bulge at DL = 6.9 ± 1.1 kpc. It also indicates a host-star mass of M∗ = 0.51-0.28 +0.44, a planet mass of Mp = 0.56-0.26 +0.34MJ, and a projected star-planet separation of a =1.75-0.33 +0.34 au. The lens-source relative proper motion is μrel = 6.5 ± 1.1 mas yr-1. The lens (and stellar host star) is estimated to be very faint compared to the source star, so it is most likely that it can be detected only when the lens and source stars start to separate. Due to the relatively high relative proper motion, the lens and source will be resolved to about ∼46 mas in 6-8 yr after the peak magnification. So, by 2020-2022, we can hope to detect the lens star with deep, high-resolution images.",
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AU - Bhattacharya, A.

AU - Bennett, D. P.

AU - Bond, I. A.

AU - Sumi, T.

AU - Udalski, A.

AU - Street, R.

AU - Tsapras, Y.

AU - Abe, F.

AU - Freeman, M.

AU - Fukui, A.

AU - Hirao, Y.

AU - Itow, Y.

AU - Koshimoto, N.

AU - Li, M. C A

AU - Ling, C. H.

AU - Masuda, K.

AU - Matsubara, Y.

AU - Muraki, Y.

AU - Nagakane, M.

AU - Ohnishi, K.

AU - Rattenbury, N.

AU - Saito, T.

AU - Sharan, A.

AU - Sullivan, D. J.

AU - Suzuki, D.

AU - Tristram, P. J.

AU - Skowron, J.

AU - Szymański, M. K.

AU - Soszyński, I.

AU - Poleski, R.

AU - Mróz, P.

AU - Kozlowski, S.

AU - Pietrukowicz, P.

AU - Ulaczyk, K.

AU - Wyrzykowski, L.

AU - Bachelet, E.

AU - Bramich, D. M.

AU - D'Ago, G.

AU - Dominik, M.

AU - Figuera Jaimes, R.

AU - Horne, K.

AU - Hundertmark, M.

AU - Kains, N.

AU - Menzies, J.

AU - Schmidt, R.

AU - Snodgrass, C.

AU - Steele, I. A.

AU - Wambsganss, J.

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N2 - We present the analysis of the planetary microlensing event OGLE-2014-BLG-1760, which shows a strong lightcurve signal due to the presence of a Jupiter mass ratio planet. One unusual feature of this event is that the source star is quite blue, with V - I = 1.48± 0.08. This is marginally consistent with a source star in the Galactic bulge, but it could possibly indicate a young source star on the far side of the disk. Assuming a bulge source, we perform a Bayesian analysis assuming a standard Galactic model, and this indicates that the planetary system resides in or near the Galactic bulge at DL = 6.9 ± 1.1 kpc. It also indicates a host-star mass of M∗ = 0.51-0.28 +0.44, a planet mass of Mp = 0.56-0.26 +0.34MJ, and a projected star-planet separation of a =1.75-0.33 +0.34 au. The lens-source relative proper motion is μrel = 6.5 ± 1.1 mas yr-1. The lens (and stellar host star) is estimated to be very faint compared to the source star, so it is most likely that it can be detected only when the lens and source stars start to separate. Due to the relatively high relative proper motion, the lens and source will be resolved to about ∼46 mas in 6-8 yr after the peak magnification. So, by 2020-2022, we can hope to detect the lens star with deep, high-resolution images.

AB - We present the analysis of the planetary microlensing event OGLE-2014-BLG-1760, which shows a strong lightcurve signal due to the presence of a Jupiter mass ratio planet. One unusual feature of this event is that the source star is quite blue, with V - I = 1.48± 0.08. This is marginally consistent with a source star in the Galactic bulge, but it could possibly indicate a young source star on the far side of the disk. Assuming a bulge source, we perform a Bayesian analysis assuming a standard Galactic model, and this indicates that the planetary system resides in or near the Galactic bulge at DL = 6.9 ± 1.1 kpc. It also indicates a host-star mass of M∗ = 0.51-0.28 +0.44, a planet mass of Mp = 0.56-0.26 +0.34MJ, and a projected star-planet separation of a =1.75-0.33 +0.34 au. The lens-source relative proper motion is μrel = 6.5 ± 1.1 mas yr-1. The lens (and stellar host star) is estimated to be very faint compared to the source star, so it is most likely that it can be detected only when the lens and source stars start to separate. Due to the relatively high relative proper motion, the lens and source will be resolved to about ∼46 mas in 6-8 yr after the peak magnification. So, by 2020-2022, we can hope to detect the lens star with deep, high-resolution images.

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KW - planetary systems

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