On Secular Gravitational Instability in Vertically Stratified Disks

Autor: Ryosuke T. Tominaga, Shu-ichiro Inutsuka, Sanemichi Z. Takahashi

Publikováno v: The Astrophysical Journal, Vol 953, Iss 1, p 60 (2023)

Secular gravitational instability (GI) is one promising mechanism for explaining planetesimal formation. Previous studies of secular GI utilized a razor-thin disk model and derived the growth condition in terms of vertically integrated physical value

Externí odkaz: https://doaj.org/article/e1e76141dea145ce9f6a90a8acf5f7fa

Planetesimal formation by the gravitational instability of dust ring structures

Autor: Sanemichi Z. Takahashi, Eiichiro Kokubo, Shu-ichiro Inutsuka

We investigate the gravitational instability (GI) of dust-ring structures and the formation of planetesimals by their gravitational collapse. The normalized dispersion relation of a self-gravitating ring structure includes two parameters that are rel

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6c215285f752c9a6f4deeb72277c0d25
http://arxiv.org/abs/2211.02311

Secular Gravitational Instability of Drifting Dust in Protoplanetary Disks: Formation of Dusty Rings without Significant Gas Substructures

Autor: Ryosuke T. Tominaga, Shu-ichiro Inutsuka, Sanemichi Z. Takahashi

Secular gravitational instability (GI) is one of the promising mechanisms for creating annular substructures and planetesimals in protoplanetary disks. We perform numerical simulations of the secular GI in a radially extended disk with inward driftin

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::67d388a3eeeb3f50ed4b9b477499f004
http://arxiv.org/abs/2008.02564

ALMA High-resolution Multiband Analysis for the Protoplanetary Disk around TW Hya

Autor: Takashi Tsukagoshi, Hideko Nomura, Takayuki Muto, Ryohei Kawabe, Kazuhiro D. Kanagawa, Satoshi Okuzumi, Shigeru Ida, Catherine Walsh, Tom J. Millar, Sanemichi Z. Takahashi, Jun Hashimoto, Taichi Uyama, Motohide Tamura

Publikováno v: Tsukagoshi, T, Nomura, H, Muto, T, Kawabe, R, Kanagawa, K D, Okuzumi, S, Ida, S, Walsh, C, Millar, T J, Takahashi, S Z, Hashimoto, J, Uyama, T & Tamura, M 2022, ' ALMA high-resolution multiband analysis for the protoplanetary disk around TW Hya ', The Astrophysical Journal, vol. 928, no. 1, 49 . https://doi.org/10.3847/1538-4357/ac5111

We present a high-resolution (2.5 au) multiband analysis of the protoplanetary disk around TW Hya using ALMA long baseline data at Bands 3, 4, 6, and 7. We aim to reconstruct a high-sensitivity millimeter continuum image and revisit the spectral inde

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c58451ea7f20320b0bed3b9615f7f6ce
http://t2r2.star.titech.ac.jp/cgi-bin/publicationinfo.cgi?q_publication_content_number=CTT100895807

Discovery of An au-scale Excess in Millimeter Emission from the Protoplanetary Disk around TW Hya

Autor: Tom J. Millar, Satoshi Okuzumi, Hideko Nomura, Motohide Tamura, Sanemichi Z. Takahashi, Ryohei Kawabe, Takayuki Muto, Taichi Uyama, Takashi Tsukagoshi, Jun Hashimoto, Catherine Walsh, Kazuhiro D. Kanagawa, Shigeru Ida

Publikováno v: Tsukagoshi, T, Muto, T, Nomura, H, Kawabe, R, Kanagawa, K D, Okuzumi, S, Ida, S, Walsh, C, Millar, T J, Takahashi, S Z, Hashimoto, J, Uyama, T & Tamara, M 2019, ' Discovery of an au-scale Excess in Millimeter Emission from the Protoplanetary Disk around TW Hya ', The Astrophysical Journal Letters, vol. 878, no. 1, L8 . https://doi.org/10.3847/2041-8213/ab224c

We report the detection of an excess in dust continuum emission at 233~GHz (1.3~mm in wavelength) in the protoplanetary disk around TW~Hya revealed through high-sensitivity observations at $\sim$3~au resolution with the Atacama Large Millimeter/submi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0f14d1cb34ea914d0b064cfcacb231cd
https://eprints.whiterose.ac.uk/147059/1/Tsukagoshi_2019_ApJL_878_L8.pdf