Faculty Profiles - INUTSUKA, Shu-ichiro

Papers - INUTSUKA, Shu-ichiro

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THE MISSING CAVITIES IN THE SEEDS POLARIZED SCATTERED LIGHT IMAGES OF TRANSITIONAL PROTOPLANETARY DISKS: A GENERIC DISK MODEL Open Access

Dong, R; Rafikov, R; Zhu, Z; Hartmann, L; Whitney, B; Brandt, T; Muto, T; Hashimoto, J; Grady, C; Follette, K; Kuzuhara, M; Tanii, R; Itoh, Y; Thalmann, C; Wisniewski, J; Mayama, S; Janson, M; Abe, L; Brandner, W; Carson, J; Egner, S; Feldt, M; Goto, M; Guyon, O; Hayano, Y; Hayashi, M; Hayashi, S; Henning, T; Hodapp, KW; Honda, M; Inutsuka, S; Ishii, M; Iye, M; Kandori, R; Knapp, GR; Kudo, T; Kusakabe, N; Matsuo, T; McElwain, MW; Miyama, S; Morino, JI; Moro-Martin, A; Nishimura, T; Pyo, TS; Suto, H; Suzuki, R; Takami, M; Takato, N; Terada, H; Tomono, D; Turner, EL; Watanabe, M; Yamada, T; Takami, H; Usuda, T; Tamura, M

ASTROPHYSICAL JOURNAL Vol. 750 ( 2 ) 2012.5

Publisher：Astrophysical Journal

Transitional circumstellar disks around young stellar objects have a distinctive infrared deficit around 10 μm in their spectral energy distributions, recently measured by the Spitzer Infrared Spectrograph (IRS), suggesting dust depletion in the inner regions. These disks have been confirmed to have giant central cavities by imaging of the submillimeter continuum emission using the Submillimeter Array (SMA). However, the polarized near-infrared scattered light images for most objects in a systematic IRS/SMA cross sample, obtained by HiCIAO on the Subaru telescope, show no evidence for the cavity, in clear contrast with SMA and Spitzer observations. Radiative transfer modeling indicates that many of these scattered light images are consistent with a smooth spatial distribution for μm-sized grains, with little discontinuity in the surface density of the μm-sized grains at the cavity edge. Here we present a generic disk model that can simultaneously account for the general features in IRS, SMA, and Subaru observations. Particularly, the scattered light images for this model are computed, which agree with the general trend seen in Subaru data. Decoupling between the spatial distributions of the μm-sized dust and mm-sized dust inside the cavity is suggested by the model, which, if confirmed, necessitates a mechanism, such as dust filtration, for differentiating the small and big dust in the cavity clearing process. Our model also suggests an inwardly increasing gas-to-dust ratio in the inner disk, and different spatial distributions for the small dust inside and outside the cavity, echoing the predictions in grain coagulation and growth models. © © 2012. The American Astronomical Society. All rights reserved..

DOI： 10.1088/0004-637X/750/2/161

Web of Science

Scopus

Theoretical Models of Protostellar Binary and Multiple Systems with AMR Simulations Open Access

Matsumoto Tomoaki, Tokuda Kazuki, Onishi Toshikazu, Inutsuka Shu-Ichiro, Saigo Kazuya, Takakuwa Shigehisa

11TH INTERNATIONAL CONFERENCE ON NUMERICAL MODELING OF SPACE PLASMA FLOWS (ASTRONUM-2016) Vol. 837 2017

The origin of rotation profiles in star-forming clouds Reviewed Open Access

Takahashi Sanemichi Z., Tomida Kengo, Machida Masahiro N., Inutsuka Shu-ichiro

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY Vol. 463 ( 2 ) page： 1390-1399 2016.12

Conditions for circumstellar disc formation - II. Effects of initial cloud stability and mass accretion rate Reviewed

Machida Masahiro N., Matsumoto Tomoaki, Inutsuka Shu-ichiro

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY Vol. 463 ( 4 ) page： 4246-4267 2016.12

AN ORIGIN OF MULTIPLE RING STRUCTURE AND HIDDEN PLANETS IN HL TAU: A UNIFIED PICTURE BY SECULAR GRAVITATIONAL INSTABILITY Reviewed Open Access

Takahashi Sanemichi Z., Inutsuka Shu-ichiro

ASTRONOMICAL JOURNAL Vol. 152 ( 6 ) 2016.12

Conditions for circumstellar disc formation - II. Effects of initial cloud stability and mass accretion rate Reviewed

M. N. Machida, T. Matsumoto, S. Inutsuka

Monthly Notices of the Royal Astronomical Society Vol. 463 ( 4 ) page： 4246-4267 2016.9

Authorship：Lead author Language：English Publishing type：Research paper (scientific journal)

Disc formation in strongly magnetized cloud cores is investigated using a three-dimensional magnetohydrodynamic simulation with a focus on the effects of the initial cloud stability and the mass accretion rate. The initial cloud stability greatly alters the disc formation process even for prestellar clouds with the same mass-to-flux ratio. A high mass accretion rate on to the disc-forming region is realized in initially unstable clouds, and a large angular momentum is introduced into the circumstellar region in a short time. The region around the protostar has both a thin infalling envelope and a weak magnetic field, which both weaken the effect of magnetic braking. The growth of the rotation-supported disc is promoted in such unstable clouds. Conversely, clouds in an initially near-equilibrium state show lower accretion rates of mass and angular momentum. The angular momentum is transported to the outer envelope before protostar formation. After protostar formation, the circumstellar region has a thick infalling envelope and a strong magnetic field that effectively brakes the disc. As a result, disc formation is suppressed when the initial cloud is in a nearly stable state. The density distribution of the initial cloud also affects the disc formation process. Disc growth strongly depends on the initial conditions when the prestellar cloud has a uniform density, whereas there is no significant difference in the disc formation process in prestellar clouds with non-uniform densities.

DOI： 10.1093/mnras/stw2256

REVEALING A DETAILED MASS DISTRIBUTION OF A HIGH-DENSITY CORE MC27/L1521F IN TAURUS WITH ALMA Reviewed Open Access

Tokuda Kazuki, Onishi Toshikazu, Matsumoto Tomoaki, Saigo Kazuya, Kawamura Akiko, Fukui Yasuo, Inutsuka Shu-ichiro, Machida Masahiro N., Tomida Kengo, Tachihara Kengo, Andre Philippe

ASTROPHYSICAL JOURNAL Vol. 826 ( 1 ) 2016.7

Atmospheric Electrification in Dusty, Reactive Gases in the Solar System and Beyond Reviewed Open Access

Helling Christiane, Harrison R. Giles, Honary Farideh, Diver Declan A., Aplin Karen, Dobbs-Dixon Ian, Ebert Ute, Inutsuka Shu-ichiro, Gordillo-Vazquez Francisco J., Littlefair Stuart

SURVEYS IN GEOPHYSICS Vol. 37 ( 4 ) page： 705-756 2016.7

DUST DYNAMICS IN PROTOPLANETARY DISK WINDS DRIVEN BY MAGNETOROTATIONAL TURBULENCE: A MECHANISM FOR FLOATING DUST GRAINS WITH CHARACTERISTIC SIZES Reviewed Open Access

Miyake Tomoya, Suzuki Takeru K., Inutsuka Shu-Ichiro

ASTROPHYSICAL JOURNAL Vol. 821 ( 1 ) 2016.4

An extension of Godunov SPH: Application to negative pressure media Reviewed Open Access

Sugiura Keisuke, Inutsuka Shu-ichiro

JOURNAL OF COMPUTATIONAL PHYSICS Vol. 308 page： 171-197 2016.3

Diffusion of cosmic rays in a multiphase interstellar medium swept-up by a supernova remnant blast wave Reviewed Open Access

Roh Soonyoung, Inutsuka Shu-ichiro, Inoue Tsuyoshi

ASTROPARTICLE PHYSICS Vol. 73 page： 1-7 2016.1

ALMA Observations of a High-density Core in Taurus: Dynamical Gas Interaction at the Possible Site of a Multiple Star Formation Reviewed Open Access

Tokuda Kazuki, Onishi Toshikazu, Saigo Kazuya, Kawamura Akiko, Fukui Yasuo, Matsumoto Tomoaki, Inutsuka Shu-ichiro, Machida Masahiro N., Tomida Kengo, Tachihara Kengo

FROM INTERSTELLAR CLOUDS TO STAR-FORMING GALAXIES: UNIVERSAL PROCESSES? ( 315 ) 2016

The Formation and Destruction of Molecular Clouds and Galactic Star Formation Reviewed Open Access

Inutsuka Shu-ichiro, Inoue Tsuyoshi, Iwasaki Kazunari, Hosokawa Takashi, Kobayashi Masato I. N.

FROM INTERSTELLAR CLOUDS TO STAR-FORMING GALAXIES: UNIVERSAL PROCESSES? ( 315 ) page： 61-68 2016

ON THE RADIUS ANOMALY OF HOT JUPITERS: REEXAMINATION OF THE POSSIBILITY AND IMPACT OF LAYERED CONVECTION Reviewed Open Access

Kurokawa Hiroyuki, Inutsuka Shu-ichiro

ASTROPHYSICAL JOURNAL Vol. 815 ( 1 ) 2015.12

Significant gas-to-dust ratio asymmetry and variation in the disk of HD 142527 and the indication of gas depletion Reviewed Open Access

Muto Takayuki, Tsukagoshi Takashi, Momose Munetake, Hanawa Tomoyuki, Nomura Hideko, Fukagawa Misato, Saigo Kazuya, Kataoka Akimasa, Kitamura Yoshimi, Takahashi Sanemichi Z., Inutsuka Shu-ichiro, Takeuchi Taku, Kobayashi Hiroshi, Akiyama Eiji, Honda Mitsuhiko, Fujiwara Hideaki, Shibai Hiroshi

PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN Vol. 67 ( 6 ) 2015.12

ATMOSPHERIC ESCAPE BY MAGNETICALLY DRIVEN WIND FROM GASEOUS PLANETS. II. EFFECTS OF MAGNETIC DIFFUSION Reviewed Open Access

Tanaka Yuki A., Suzuki Takeru K., Inutsuka Shu-ichiro

ASTROPHYSICAL JOURNAL Vol. 809 ( 2 ) 2015.8

The formation and destruction of molecular clouds and galactic star formation An origin for the cloud mass function and star formation efficiency Reviewed Open Access

Inutsuka Shu-ichiro, Inoue Tsuyoshi, Iwasaki Kazunari, Hosokawa Takashi

ASTRONOMY & ASTROPHYSICS Vol. 580 2015.8

The formation and destruction of molecular clouds and galactic star formation. An origin for the cloud mass function and star formation efficiency Reviewed Open Access

Shu-ichiro Inutsuka, Tsuyoshi Inoue, Kazunari Iwasaki, Takashi Hosokawa

Astronomy & Astrophysics Vol. 580 ( A49 ) page： 7 2015.7

Authorship：Lead author Language：English Publishing type：Research paper (scientific journal)

We describe an overall picture of galactic-scale star formation. Recent high-resolution magneto-hydrodynamical simulations of two-fluid dynamics with cooling, heating, and thermal conduction have shown that the formation of molecular clouds requires multiple episodes of supersonic compression. This finding enables us to create a scenario in which molecular clouds form in interacting shells or bubbles on a galactic scale. First, we estimated the ensemble-averaged growth rate of molecular clouds on a timescale longer than a million years. Next, we performed radiation hydrodynamics simulations to evaluate the destruction rate of magnetized molecular clouds by the stellar far-ultraviolet radiation. We also investigated the resulting star formation efficiency within a cloud, which amounts to a low value (a few percent) if we adopt the power-law exponent ~2.5 for the mass distribution of stars in the cloud. We finally describe the time evolution of the mass function of molecular clouds on a long timescale (>1 Myr) and discuss the steady state exponent of the power-law slope in various environments.

DOI： 10.1051/0004-6361/201425584

Formation of terrestrial planets in disks evolving via disk winds and implications for the origin of the solar system's terrestrial planets Reviewed Open Access

Ogihara Masahiro, Kobayashi Hiroshi, Inutsuka Shu-ichiro, Suzuki Takeru K.

ASTRONOMY & ASTROPHYSICS Vol. 579 2015.7

An origin of arc structures deeply embedded in dense molecular cloud cores Reviewed Open Access

Matsumoto Tomoaki, Onishi Toshikazu, Tokuda Kazuki, Inutsuka Shu-ichiro

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY Vol. 449 ( 1 ) page： L123-L127 2015.5

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Papers - INUTSUKA, Shu-ichiro