435 citations · 5.6k across the 113 of their papers we have counts for
118 papers
Resolved Structure and Orbital Motion of a Localized 1 au-scale Dust Accumulation in the Protoplanetary Disk around TW Hya
Takashi Tsukagoshi, Takayuki Muto, Hideko Nomura +6
We present the results of high-resolution (~au) Atacama Large Millimeter/submillimeter Array (ALMA) observations of the TW~Hya protoplanetary disk in the Band 6 dust continu…
Probing disk dynamics and dust evolution through shadows in protoplanetary disks: A case study of the HD 142527 disk
Yuya Fukuhara, Ryuta Orihara, Satoshi Okuzumi +1
Planet formation begins with dust growth and planetesimal formation within protoplanetary disks surrounding young stars. To understand these processes, it is essential to estimate…
Interpreting ALMA Multiwavelength Continuum Observations of PDS 70 c: An Optically Thick Dust Ring in the Circumplanetary Disk
Yuhito Shibaike, Satoshi Okuzumi, Takahiro Ueda +2
Giant planets form small gas disks, called circumplanetary disks (CPDs), during gas accretion. The CPD of PDS 70 c has been detected by the Atacama Large Millimeter/submillimeter A…
Heavy element enrichment of gas in surface-accretion disks: A possible origin of the mass-metallicity anti-correlation in exoplanets
Yoshitaka Ikeda, Kazumasa Ohno, Satoshi Okuzumi
Recent observations, including those by JWST, suggest that the atmospheres of many gas giant exoplanets have super-stellar metallicity that is anti-correlated with planetary mass.…
Beyond the model: scaling the wind-driven accretion rate in protoplanetary disks using systematic non-ideal magnetohydrodynamical simulations
Haruhi Enomoto, Shoji Mori, Satoshi Okuzumi
Magnetically driven mass accretion plays a key role in protoplanetary disk evolution and planet formation. However, the alpha prescription remains phenomenological, and how the acc…
Thermal instability and rocky planetesimal formation in the inner regions of protoplanetary disks
Ryo Kato, Takahiro Ueda, Satoshi Okuzumi
The inner regions of protoplanetary disks are promising formation sites of rocky planetesimals. Theoretical studies have proposed that dust trapping at the magnetorotational instab…
Characteristics of natural remanence records in fine-grained particles returned from asteroid Ryugu
Masahiko Sato, Yuki Kimura, Tadahiro Hatakeyama +25
Particles collected from the asteroid Ryugu by the Hayabusa2 spacecraft offer a unique opportunity to investigate the magnetic record of the primitive solar system, as any terrestr…
A Possible Indication of Metallic Iron in White Dwarf Dusty Disks from their "Dirtiness"
Ayaka Okuya, Satoshi Okuzumi, Aki Takigawa +1
Polluted white dwarfs provide unique constraints on the elemental compositions of planetary bodies. The tidal disruption of accreting bodies is thought to form circumstellar dusty…
Helium Depletion in Escaping Atmospheres of Sub-Neptunes: A Signature of Primary-to-Secondary Transition
Issei Kobayashi, Hiroyuki Kurokawa, Laura Schaefer +1
Short-period sub-Neptunes are common in extrasolar systems. These sub-Neptunes are generally thought to have primary atmospheres of protoplanetary-disk gas origin. However, atmosph…
Modeling the Contact Surfaces Formed by Pebble Collisions: Application to Formation of Comet 67P/Churyumov--Gerasimenko
Misako Tatsuuma, Satoshi Okuzumi, Akimasa Kataoka +1
Modeling the contact surfaces formed by pebble collisions is crucial to understanding the formation process of comets, which are thought to be composed of pebbles. In this paper, w…
The Impact of Silicate Grain Coagulation on Millimeter Emission from Massive Protostellar Disks
Ryota Yamamuro, Kei E. I. Tanaka, Satoshi Okuzumi
Hot accretion disks around massive protostars provide a unique opportunity to study ice-free silicate grains that cannot be investigated in protoplanetary disks. We conduct a self-…
Multi-Wavelength Dust Characterization of the HL Tau Disk and Implications for Planet Formation
Takahiro Ueda, Sean M. Andrews, Carlos Carrasco-González +4
We present a comprehensive analysis of the HL Tau dust disk by modeling its intensity profiles across six wavelengths (0.45 to 7.9 mm) with a resolution of 0.05 arcsec ( au)…
Hydrodynamical simulations of the vertical shear instability with dynamic dust and cooling rates in protoplanetary disks
Yuya Fukuhara, Mario Flock, Satoshi Okuzumi +1
Turbulence in protoplanetary disks affects dust evolution and planetesimal formation. The vertical shear instability (VSI) is one of the candidate turbulence-driving mechanisms in…
A Dichotomy of the Mass-Metallicity Relation of Exoplanetary Atmospheres Demarcated by their Birthplace
Kazumasa Ohno, Masahiro Ikoma, Satoshi Okuzumi +1
Atmospheric observations by JWST raise a growing evidence that atmospheric metallicity exhibits an anti-correlation with masses of giant exoplanets. While such a trend was anticipa…
Thermally driven spontaneous dust accumulation in the inner regions of protoplanetary disks
Ryo Kato, Takahiro Ueda, Satoshi Okuzumi
In protoplanetary disks, the formation of planetesimals via streaming and/or gravitational instabilities requires regions with a locally enhanced dust-to-gas mass ratio. Convention…
Investigating the Bouncing Barrier with Collision Simulations of Compressed Dust Aggregates
Haruto Oshiro, Misako Tatsuuma, Satoshi Okuzumi +1
The collision outcomes of dust aggregates in protoplanetary disks dictate how planetesimals form. Experimental and numerical studies have suggested that bouncing collisions occurri…
Modeling protoplanetary disk heating by planet-induced spiral shocks
Tomohiro Ono, Tatsuki Okamura, Satoshi Okuzumi +1
We investigate the heating of protoplanetary disks caused by shocks associated with spiral density waves induced by an embedded planet. Using two-dimensional hydrodynamical simulat…
Surface accretion as a dust retention mechanism in protoplanetary disks. I. Formulation and proof-of-concept simulations
Satoshi Okuzumi
Planetesimal formation via the streaming and gravitational instabilities of dust in protoplanetary disks requires a local enhancement of the dust-to-gas mass ratio. Radial drift of…
Dust ring and gap formation by gas flow induced by low-mass planets embedded in protoplanetary disks . Time-dependent model
Ayumu Kuwahara, Michiel Lambrechts, Hiroyuki Kurokawa +2
The observed dust rings and gaps in protoplanetary disks could be imprints of forming planets. Even low-mass planets in the one-to-ten Earth-mass regime, that do not yet carve deep…
Nitrogen transport in protoplanetary disks by ammonium salts: a possible origin of Jupiter's nitrogen enrichment
Kanon Nakazawa, Satoshi Okuzumi
Atmospheric compositions preserve the history of planet formation processes. Jupiter has the remarkable feature of being uniformly enriched in various elements compared to the Sun,…
On the elastoplastic behavior in collisional compression of spherical dust aggregates
Sota Arakawa, Hidekazu Tanaka, Eiichiro Kokubo +4
Aggregates consisting of submicron-sized cohesive dust grains are ubiquitous, and understanding the collisional behavior of dust aggregates is essential. It is known that low-speed…
Support for fragile porous dust in a gravitationally self-regulated disk around IM Lup
Takahiro Ueda, Ryo Tazaki, Satoshi Okuzumi +2
Protoplanetary disks, the birthplace of planets, are expected to be gravitationally unstable in their early phase of evolution. IM Lup, a well-known T-Tauri star, is surrounded by…
Isotopic variation of non-carbonaceous meteorites caused by dust leakage across the Jovian gap in the solar nebula
Kazuaki A. Homma, Satoshi Okuzumi, Sota Arakawa +1
High-precision isotopic measurements of meteorites revealed that they are classified into non-carbonaceous (NC) and carbonaceous (CC) meteorites. One plausible scenario for achievi…
A self-consistent model for dust settling and the vertical shear instability in protoplanetary disks
Yuya Fukuhara, Satoshi Okuzumi
The spatial distribution of dust particles in protoplanetary disks affects dust evolution and planetesimal formation processes. The vertical shear instability (VSI) is one of the c…