The origin of the high metallicity of close-in giant exoplanets: Combined effect of the resonant and aerodynamic shepherding

Shibata, S., Helled, R. and Ikoma, M.

Astronomy & Astrophysics, Volume 633, January 2020

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Kojima-1Lb Is a Mildly Cold Neptune around the Brightest Microlensing Host Star

Fukui, A. et al.

The Astronomical Journal, 158, 206 (2019)

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Constraining planetary gas accretion rate from Hα linewidth and intensity: Case of PDS 70 b and c

Aoyama, Y. and Ikoma, M.

The Astrophysical Journal Letters, in press.

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Runaway climate cooling of ocean planets in the habitable zone: a consequence of seafloor weathering enhanced by melting of high-pressure ice

Nakayama, A., Kodama, T., Ikoma, M., and Abe, Y. 

Monthly Notices of the Royal Astronomical Society 488, 1580-1596 (2019)

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Capture of solids by growing proto-gas giants: effects of gap formation and supply limited growth

Shibata, S. and Ikoma, M.

Monthly Notices of the Royal Astronomical Society 487, 4510-4524 (2019)

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Theoretical Transmission Spectra of Exoplanet Atmospheres with Hydrocarbon Haze: Effect of Creation, Growth, and Settling of Haze Particles. II. Dependence on UV Irradiation Intensity, Metallicity, C/O Ratio, Eddy Diffusion Coefficient, and Temperature

Kawashima, Y. and Ikoma, M.

The Astrophysical Journal 877, id. 109, 21 (2019)

 

Detectable Molecular Features above Hydrocarbon Haze via Transmission Spectroscopy with JWST: Case Studies of GJ 1214b-, GJ 436b-, HD 97658b-, and Kepler-51b-like Planets

Kawashima, Y., Hu, R., and Ikoma, M.

The Astrophysical Journal Letters 876, id. L5, 7 (2019)

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First measurements of Jupiter's zonal winds with visible imaging spectroscopy

Gonçalves, I. et al. 

Icarus 319,795-811 (2019) [ADS]

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Stellar Imaging Coronagraph and Exoplanet Coronal Spectrometer - Two Additional Instruments for Exoplanet Exploration Onboard the WSO-UV 1.7 Meter Orbital Telescope

Tavrov, A. et al.

Journal of Astronomical Telescopes, Instruments, and Systems, accepted

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A Chemical Survey of Exoplanets with ARIEL

Tinetti, G., Drossart, P., Eccleston, P., ..., Ikoma, M. et al.

Experimental Astronomy, accepted [ADS]

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Theoretical Model of Hydrogen Line Emission from Accreting Gas Giants

Aoyama, Y., Ikoma, M., & Tanigawa, T.

The Astrophysical Journal, 866 (2), id. 84, 16 pp. (2018) [ADS]

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Revisiting the pre-main-sequence evolution of stars II. Consequences of planet formation on stellar surface composition

Kunitomo, M., Guillot, T., Ida, S. & Takeuchi, T.

Astronomy & Astrophysics, accepted [ADS]

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The Origin of Heavy Element Content Trend in Giant Planets via Core Accretion

Hasegawa, Y., Bryden, G., Ikoma, M., Gautam, V. & Swain, M.

The Astrophysical Journal, accepted [ADS]

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Hot grain dynamics by electric charging and magnetic trapping in debris disks

Kimura, H., Kunitomo, M., Suzuki, T. K., Robrade, J., Thebault, P., & Mitsuishi, I.
Planetary and Space Science, accepted  [ADS]

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Water Partitioning in Planetary Embryos and Protoplanets with Magma Oceans

Ikoma, M.,  L. Elkins-Tanton, K. Hamano, & J. Suckale

Space Science Reviews, 214, 76  (2018) [ADS]

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Theoretical Transmission Spectra of Exoplanet Atmospheres with Hydrocarbon Haze: Effect of Creation, Growth, and Settling of Haze Particles. I. Model Description and First Results

Kawashima, Y. & Ikoma, M. 

The Astrophysical Journal, 853, 7 (2018) [ADS]

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Constraining Accretion Signatures of Exoplanets in the TW Hya Transitional Disk

Uyama, T., Tanigawa, T., Hashimoto, J., Tamura, M., Aoyama, Y., Brandt, T.~D., & Ishizuka, M.

The Astronomical Journal, 154, 90 (2017) [ADS]

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Ejection of Iron-bearing Giant-impact Fragments and the Dynamical and Geochemical Influence of the Fragment Re-accretion

Genda, H., Iizuka, T., Sasaki, T., Ueno, Y., & Ikoma, M.

Earth and Planetary Science Letters, 470, 87-95 (2017) [ADS]

 

Acceleration of Cooling of Ice Giants by Condensation in Early Atmospheres 

Kurosaki, K., & Ikoma, M.

The Astronomical Journal, 153, 260 (2017) [ADS]

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Formation and Evolution of Protoatmospheres

Massol, H., ..., Ikoma, M. (4th author), et al.

Space Science Reviews, 205, 153-211 (2016) [ADS]

 

Demonstrating High-precision, Multiband Transit Photometry with MuSCAT: A Case for HAT-P-14b

Fukui, A., Narita, N., Kawashima, Y., Kusakabe, N., Onitsuka, M., Ryu, T., Ikoma, M., Yanagisawa, K., & Izumiura, H.

The Astrophysical Journal, 819, 27 (2016) [ADS]

 

 An eclipsing double-line spectroscopic binary at the stellar/substellar boundary in the Upper Scorpius OB association

Lodieu, N., ..., Kawashima, Y. (6th author), et al.

Astronomy & Astrophysics, 584, A128 (15pp) (2015) [ADS]

 

Critical Core Mass for Enriched Envelopes: The Role of H2O Condensation
J. Venturini, Y. Alibert, W. Benz, & M. Ikoma
Astronomy & Astrophysics, 576, A114 (2015) [ADS]

 

Theoretical Emission Spectra of Atmospheres of Hot Rocky Super-Earths
Ito, Y., Ikoma, M., Kawahara, H., Nagahara, H., Kawashima, Y., & Nakamoto, T. 
The Astrophysical Journal, 801, 144 (2015) [ADS]

 

Multi-band, Multi-epoch Observations of the Transiting Warm Jupiter WASP-80b
Fukui, A., Kawashima, Y., Ikoma, M. et al. 
The Astrophysical Journal, 790, 108 (2014) [ADS]

 

Initiation of Leaking Earth: An Ultimate Trigger of the Cambrian Explosion 

Maruyama, S., Sawaki, Y., Ebisuzaki, T., Ikoma, M., Omori, S., & Komabayashi, T.

Gondwana Research, 25, 910-944 (2014) [Link]

 

Impact of Photo-Evaporative Mass Loss on Masses and Radii of Water-Rich Sub/Super-Earths 
Kurosaki, K., Ikoma, M. & Hori, Y.
Astronomy & Astrophysics, 562, A80 (14pp) (2014) [ADS]

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Starspots-Transit Depth Relation of the Evaporating Planet Candidate KIC 12557548b
Kawahara, H., Hirano, T., Kurosaki, K., Ito, Y. & Ikoma, M.
The Astrophysical Journal, 776L, 6 (2013) [ADS]

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Multi-color Transit Photometry of GJ 1214b through BJHKs Bands and a Long-term Monitoring of the Stellar Variability of GJ 1214
Narita, N., Fukui, A., Ikoma, M., Hori, Y., Kurosaki, K., Kawashima, Y. et al.
The Astrophysical Journal, 773, 144 (2013) [ADS]
 

Optical-to-near-infrared Simultaneous Observations for the Hot Uranus GJ3470b: A Hint of a Cloud-free Atmosphere
Fukui, A., Narita, N., Kurosaki, K., Ikoma, M. et al.
The Astrophysical Journal, 770, 95 (2013) [ADS]

 

IRSF SIRIUS JHKs Simultaneous Transit Photometry of GJ 1214b
Narita, N., Nagayama, T., Suenaga, T., Fukui, A., Ikoma, M. et al. 
Publications of the Astronomical Society of Japan, 65, 27 (2013) [ADS]

 

The Naked Planet Earth: Most Essential Pre-requisite for the Origin and Evolution of Life
Maruyama, S., Ikoma, M., Genda, H., et al. 
Geoscience Frontiers, 4, 141-165 (2013) [ADS]

 

In Situ Accretion of Hydrogen-rich Atmospheres on Short-period Super-Earths: Implications for the Kepler-11 Planets
Ikoma, M. & Hori, Y. 
The Astrophysical Journal, 753, 66 (2012) [ADS]