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6 papers · 1 filter
What determines the density structure of molecular clouds ? A case study of Orion B with Herschel
N. Schneider, Ph. Andre, V. Konyves +19
A key parameter to the description of all star formation processes is the density structure of the gas. In this letter, we make use of probability distribution functions (PDFs) of…
The ACS Nearby Galaxy Survey Treasury V. Radial Star Formation History of NGC 300
Stephanie M. Gogarten, Julianne J. Dalcanton, Benjamin F. Williams +13
We present new Hubble Space Telescope (HST) observations of NGC 300 taken as part of the ACS Nearby Galaxy Survey Treasury (ANGST). Individual stars are resolved in these images do…
O and Na abundance patterns in open clusters of the Galactic disk
G. M. De Silva, B. K. Gibson, J. Lattanzio +1
Aims. A global O-Na abundance anti-correlation is observed in globular clusters, which is not present in the Galactic field population. Open clusters are thought to be chemically h…
The Dual Origin of Stellar Halos
Adi Zolotov, Beth Willman, Alyson M. Brooks +5
We investigate the formation of the stellar halos of four simulated disk galaxies using high resolution, cosmological SPH + N-Body simulations. These simulations include a self-con…
The Chemical Evolution of Globular Clusters I. Reactive Elements and Non-Metals
Andrea Marcolini, Brad K. Gibson, Amanda I. Karakas +1
We propose a new chemical evolution model aimed at explaining the chemical properties of globular clusters (GC) stars. Our model depends upon the existence of (i) a peculiar pre-en…
Cold Dark Matter Substructure and Galactic Disks II: Dynamical Effects of Hierarchical Satellite Accretion
Stelios Kazantzidis, Andrew R. Zentner, Andrey V. Kravtsov +2
(Abridged) We perform dissipationless N-body simulations to elucidate the dynamical response of thin disks to bombardment by cold dark matter (CDM) substructure. Our method combine…