Výsledky vyhledávání

The hidden giant: discovery of an enormous Galactic dwarf satellite in Gaia DR2

Autor: Kyler Kuehn, Nick Evans, Daniel B. Zucker, Jason L. Sanders, Vasily Belokurov, Sergey E. Koposov, G. Torrealba, W. Dehnen, Matthew G. Walker, Alex Geringer-Sameth, Tenglin Li

Publikováno v: Torrealba, G, Belokurov, V, Koposov, S E, Li, T S, Walker, M G, Sanders, J L, Geringer-Sameth, A, Zucker, D B, Kuehn, K, Evans, N W & Dehnen, W 2019, ' The hidden giant : discovery of an enormous Galactic dwarf satellite in Gaia DR2 ', Monthly Notices of the Royal Astronomical Society, vol. 488, no. 2, pp. 2743-2766 . https://doi.org/10.1093/mnras/stz1624

We report the discovery of a Milky Way satellite in the constellation of Antlia. The Antlia 2 dwarf galaxy is located behind the Galactic disc at a latitude of $b\sim 11^{\circ}$ and spans $1.26$ degrees, which corresponds to $\sim2.9$ kpc at its dis

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a6d4f1f977c4c5beb83e323cccd09911
https://doi.org/10.1093/mnras/stz1624

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Giant planets and brown dwarfs on wide orbits: a code comparison project

Autor: Farzana Meru, W. Dehnen, Hongping Deng, Lucio Mayer, Ken Rice, Dimitris Stamatellos, Mark Fletcher, Sergei Nayakshin

Publikováno v: Fletcher, M, Nayakshin, S, Stamatellos, D, Dehnen, W, Meru, F, Mayer, L, Deng, H & Rice, K 2019, ' Giant planets and brown dwarfs on wide orbits : a code comparison project ', Monthly Notices of the Royal Astronomical Society . https://doi.org/10.1093/mnras/stz1123

Gas clumps formed within massive gravitationally unstable circumstellar discs are potential seeds of gas giant planets, brown dwarfs and companion stars. Simulations show that competition between three processes -- migration, gas accretion and tidal

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b6ddad82b9661c7107796ef316676359
https://doi.org/10.1093/mnras/stz1123

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Breaking beta: a comparison of mass modelling methods for spherical systems

Autor: W. Dehnen, Matthew G. Walker, Justin I. Read, Gary A. Mamon, Mark I. Wilkinson, Jorge Peñarrubia, Payel Das, Laura L. Watkins, Eugene Vasiliev

Publikováno v: Monthly Notices of the Royal Astronomical Society

We apply four different mass modelling methods to a suite of publicly available mock data for spherical stellar systems. We focus on the recovery of the density and velocity anisotropy as a function of radius, using either line-of-sight velocity data

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2007a37cb989c47d7000297dbcba5415

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How gravitational softening affects galaxy stability – I. Linear mode analysis of disc galaxies

Autor: W. Dehnen, Jean-Baptiste Fouvry, Sven De Rijcke

Publikováno v: Monthly Notices of the Royal Astronomical Society
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY

Linear perturbation is used to investigate the effect of gravitational softening on the retrieved two-armed spiral eigenmodes of razor-thin stellar discs. We explore four softening kernels with different degrees of gravity bias, and with/without comp

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bd0da8e138d37ef5858d5dd2596102d4

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