Analogues of Cores and Stars in Simulated Molecular Clouds

Autor:	Michael J. C. Reid, Alison Sills, James Wadsley, Farid Qamar, Nicholas Petitclerc
Rok vydání:	2010
Předmět:	Physics geography geography.geographical_feature_category Star formation Turbulence Molecular cloud Astronomy and Astrophysics Astrophysics Sink (geography) T Tauri star Stars Space and Planetary Science Log-normal distribution High mass Astrophysics::Galaxy Astrophysics
Zdroj:	Proceedings of the International Astronomical Union. 6:129-132
ISSN:	1743-9221 1743-9213
DOI:	10.1017/s1743921311000287
Popis:	We use images derived from collapsing, turbulent molecular cloud simulations without sinks to explore the effects of finite image angular resolution and noise on the derived clump mass function. These effects randomly perturb the clump masses, producing a lognormal clump mass function with a Salpeter-like high mass end. We show that the characteristic break mass of the simulated clump mass functions changes with the angular resolution of the images in a way that is entirely consistent with the observations. We also present some cautionary tales regarding sink particles and highlight the need to ensure that sinks actually correspond to distinct collapsing objects. We test several popular numerical sink criteria in the literature and compare to converged, non-sink results.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::85b4e9eb3dd968313bbac5b4bbdd9d21 https://doi.org/10.1017/s1743921311000287 Zobrazit plný text záznamu