The impact of the Hall effect during cloud core collapse: Implications for circumstellar disk evolution

Yusuke Tsukamoto, Satoshi Okuzumi, Kazunari Iwasaki, Masahiro N. Machida, Shu Ichiro Inutsuka

研究成果: ジャーナルへの寄稿記事

18 引用 (Scopus)

抄録

We perform three-dimensional radiation non-ideal magnetohydrodynamics simulations and investigate the impact of the Hall effect on the angular momentum evolution in collapsing cloud cores in which the magnetic field B and angular momentum Jang are misaligned with each other. We find that the Hall effect noticeably changes the magnetic torques in the pseudo-disk, and strengthens and weakens the magnetic braking in cores with acute and obtuse relative angles between B and Jang, respectively. This suggests that the bimodal evolution of the disk size may occur in the early disk evolutionary phase even if B and Jang are randomly distributed. We show that a counter-rotating envelope forms in the upper envelope of the pseudo-disk in cloud coreswith obtuse relative angles. We also find that a counter-rotating region forms at the midplane of the pseudo-disk in cloud cores with acute relative angles. The former and latter types of counter-rotating envelopes may be associated with young stellar objects with large (r ~ 100 au) and small (r ≤ 10 au) disks, respectively.

元の言語英語
記事番号95
ジャーナルPublications of the Astronomical Society of Japan
69
発行部数6
DOI
出版物ステータス出版済み - 1 1 2017

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Hall effect
angular momentum
counters
envelopes
magnetohydrodynamics
torque
magnetic field
magnetohydrodynamic simulation
braking
simulation
effect
momentum
radiation
magnetic fields
young

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

これを引用

The impact of the Hall effect during cloud core collapse : Implications for circumstellar disk evolution. / Tsukamoto, Yusuke; Okuzumi, Satoshi; Iwasaki, Kazunari; Machida, Masahiro N.; Inutsuka, Shu Ichiro.

:: Publications of the Astronomical Society of Japan, 巻 69, 番号 6, 95, 01.01.2017.

研究成果: ジャーナルへの寄稿記事

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abstract = "We perform three-dimensional radiation non-ideal magnetohydrodynamics simulations and investigate the impact of the Hall effect on the angular momentum evolution in collapsing cloud cores in which the magnetic field B and angular momentum Jang are misaligned with each other. We find that the Hall effect noticeably changes the magnetic torques in the pseudo-disk, and strengthens and weakens the magnetic braking in cores with acute and obtuse relative angles between B and Jang, respectively. This suggests that the bimodal evolution of the disk size may occur in the early disk evolutionary phase even if B and Jang are randomly distributed. We show that a counter-rotating envelope forms in the upper envelope of the pseudo-disk in cloud coreswith obtuse relative angles. We also find that a counter-rotating region forms at the midplane of the pseudo-disk in cloud cores with acute relative angles. The former and latter types of counter-rotating envelopes may be associated with young stellar objects with large (r ~ 100 au) and small (r ≤ 10 au) disks, respectively.",
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AU - Inutsuka, Shu Ichiro

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N2 - We perform three-dimensional radiation non-ideal magnetohydrodynamics simulations and investigate the impact of the Hall effect on the angular momentum evolution in collapsing cloud cores in which the magnetic field B and angular momentum Jang are misaligned with each other. We find that the Hall effect noticeably changes the magnetic torques in the pseudo-disk, and strengthens and weakens the magnetic braking in cores with acute and obtuse relative angles between B and Jang, respectively. This suggests that the bimodal evolution of the disk size may occur in the early disk evolutionary phase even if B and Jang are randomly distributed. We show that a counter-rotating envelope forms in the upper envelope of the pseudo-disk in cloud coreswith obtuse relative angles. We also find that a counter-rotating region forms at the midplane of the pseudo-disk in cloud cores with acute relative angles. The former and latter types of counter-rotating envelopes may be associated with young stellar objects with large (r ~ 100 au) and small (r ≤ 10 au) disks, respectively.

AB - We perform three-dimensional radiation non-ideal magnetohydrodynamics simulations and investigate the impact of the Hall effect on the angular momentum evolution in collapsing cloud cores in which the magnetic field B and angular momentum Jang are misaligned with each other. We find that the Hall effect noticeably changes the magnetic torques in the pseudo-disk, and strengthens and weakens the magnetic braking in cores with acute and obtuse relative angles between B and Jang, respectively. This suggests that the bimodal evolution of the disk size may occur in the early disk evolutionary phase even if B and Jang are randomly distributed. We show that a counter-rotating envelope forms in the upper envelope of the pseudo-disk in cloud coreswith obtuse relative angles. We also find that a counter-rotating region forms at the midplane of the pseudo-disk in cloud cores with acute relative angles. The former and latter types of counter-rotating envelopes may be associated with young stellar objects with large (r ~ 100 au) and small (r ≤ 10 au) disks, respectively.

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