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The formation and evolution of a circumstellar disk in magnetized cloud cores is investigated from prestellar core stage until sim 10^4 yr after protostar formation. In the circumstellar disk, fragmentation first occurs due to gravitational…

Solar and Stellar Astrophysics · Physics 2015-05-27 Masahiro N. Machida , Shu-ichiro Inutsuka , Tomoaki Matsumoto

We present the results of N-body simulations in which we take the masses, positions and velocities of sink particles from five pairs of hydrodynamical simulations of star formation by Dale et al. (2012, 2013) and evolve them for a further…

Astrophysics of Galaxies · Physics 2015-06-15 Richard J. Parker , James E. Dale

Feedback from star formation is thought to play a key role in the formation and evolution of galaxies, but its implementation in cosmological simulations is currently hampered by a lack of numerical resolution. We present and test a…

Astrophysics · Physics 2011-06-29 Claudio Dalla Vecchia , Joop Schaye

Growing planets interact with their surrounding protoplanetary disk, generating feedback effects that may promote or suppress nearby planet formation. We study how spiral waves launched by planets affect the motion and collisional evolution…

Earth and Planetary Astrophysics · Physics 2024-11-19 Linn E. J. Eriksson , Chao-Chin Yang , Philip J. Armitage

We couple non-magnetic, hydrodynamical simulations of collapsing protostellar cores with radiative transfer evolutionary models to generate synthetic observations. We then use these synthetic observations to investigate the extent to which…

Astrophysics of Galaxies · Physics 2015-06-22 Michael M. Dunham , Eduard I. Vorobyov , Héctor G. Arce

Cosmic rays (CRs) are thought to play an important role in galaxy evolution. We study their effect when coupled to other important sources of feedback, namely supernovae and stellar radiation, by including CR anisotropic diffusion and…

Astrophysics of Galaxies · Physics 2022-05-27 Marion Farcy , Joakim Rosdahl , Yohan Dubois , Jérémy Blaizot , Sergio Martin-Alvarez

We report the first characterisation of the individual discs in the intermediate separation binary systems KK Oph and HD 144668 at millimetre wavelengths. In both systems the circum-primary and the circum-secondary discs are detected in the…

Radiative feedback is an important consequence of cluster formation in Giant Molecular Clouds (GMCs) in which newly formed clusters heat and ionize their surrounding gas. The process of cluster formation, and the role of radiative feedback,…

Astrophysics of Galaxies · Physics 2016-07-27 Corey Howard , Ralph Pudritz , William Harris

We study the formation of very metal-poor stars under protostellar radiative feedback effect. We use cosmological simulations to identify low-mass dark matter halos and star-forming gas clouds within them. We then follow protostar formation…

Astrophysics of Galaxies · Physics 2021-04-23 Hajime Fukushima , Takashi Hosokawa , Gen Chiaki , Kazuyuki Omukai , Naoki Yoshida , Rolf Kuiper

We have developed a new scheme to treat a multiphase interstellar medium in smoothed particle hydrodynamics simulations of galaxy formation. This scheme can represent a co-spatial mixture of cold and hot ISM components, and is formulated…

We couple star cluster formation and feedback simulations of a Carina-like star forming region with 1D disc evolutionary models to study the impact of external photoevaporation on disc populations in massive star forming regions. To…

Earth and Planetary Astrophysics · Physics 2022-03-30 Lin Qiao , Thomas J. Haworth , Andrew D. Sellek , Ahmad A. Ali

We carried out two-dimensional high-resolution simulations to study the effect of dust feedback on the evolution of vortices induced by massive planets in protoplanetary disks. Various initial dust to gas disk surface density ratios…

Earth and Planetary Astrophysics · Physics 2014-10-30 Wen Fu , Hui Li , Stephen Lubow , Shengtai Li , Edison Liang

We examine the effects of stellar feedback and bursty star formation on low-mass galaxies ($M_{\rm star}=2\times10^6-5\times10^{10}{\rm M_{\odot}}$) using the FIRE (Feedback in Realistic Environments) simulations. While previous studies…

The migration of planets plays an important role in the early planet-formation process. An important problem has been that standard migration theories predict very rapid inward migration, which poses problems for population synthesis…

Earth and Planetary Astrophysics · Physics 2014-01-09 Bertram Bitsch , Willy Kley

We report on the results of the first 3D SPH simulation of massive, gravitationally unstable protoplanetary disks with radiative transfer. We adopt a flux-limited diffusion scheme justified by the high opacity of most of the disk. The…

Astrophysics · Physics 2009-11-11 Lucio Mayer , Graeme Lufkin , Thomas Quinn , James Wadsley

We use two hydrodynamical simulations (with and without photoionising feedback) of the self-consistent evolution of molecular clouds (MCs) undergoing global hierarchical collapse (GHC), to study the effect of the feedback on the structural…

Astrophysics of Galaxies · Physics 2020-09-25 Alejandro González-Samaniego , Enrique Vazquez-Semadeni

Gravitational instability (GI) has long been considered a viable pathway for giant planet formation in protoplanetary disks (PPDs), especially at wide orbital separations or around low-mass stars where core accretion faces significant…

Earth and Planetary Astrophysics · Physics 2025-10-24 Yang Ni , Hongping Deng , Xue-Ning Bai

Continuing our study of the effects of secular resonances on the formation of terrestrial planets in moderately close binary stars, we present here the results of an extensive numerical simulations of the formation of these objects.…

Earth and Planetary Astrophysics · Physics 2025-07-29 Nader Haghighipour , Michael Andrews

The gap formation induced by a giant planet is important in the evolution of the planet and the protoplanetary disc. We examine the gap formation by a planet with a new formulation of one-dimensional viscous discs which takes into account…

Earth and Planetary Astrophysics · Physics 2015-06-23 Kazuhiro D. Kanagawa , Hidekazu Tanaka , Takayuki Muto , Takayuki Tanigawa , Taku Takeuchi

We investigate the coupling between the temporal variation from galaxy-formation feedback and the bar instability. We show that fluctuations from mass outflow on star-formation time scales affect the radial motion of disk orbits. The…

Astrophysics of Galaxies · Physics 2025-06-16 Martin D. Weinberg