Peter Teuben

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A new code for astrophysical magnetohydrodynamics (MHD) is described. The code has been designed to be easily extensible for use with static and adaptive mesh refinement. It combines higher-order Godunov methods with the constrained transport (CT) technique to enforce the divergence-free constraint on the magnetic field. Discretization is based on(More)
We present MUSE, a software framework for combining existing computational tools for different astrophysical domains into a single multiphysics, multiscale application. MUSE facilitates the coupling of existing codes written in different languages by providing inter-language tools and by specifying an interface between each module and the framework that(More)
NEMO is a toolbox for users and programmers with which a wide range of experimental situations can be constructed, dynamically evolved, and analyzed. Primarily geared towards stellar dynamics, NEMO is by no means restricted to it. Great importance has been given to making the package extendible and to exibly import and export data. NEMO has been implemented(More)
We have mapped the barred spiral NGC 5383 using the BIMA millimeter-wave array for observations of CO (J=1–0), the Palomar 1.5m for Hα and optical broadband, and the Kitt Peak 1.3m for near-IR broadband. We compare the observed central gas and dust morphology to the predictions of recent hydrodynamic simulations calculated using the Piner, Stone, and Teuben(More)
Piet Hut ∗ a , Michael M. Shara b , Sverre J. Aarseth c , Ralf S. Klessen d , James C. Lombardi Jr. e , Junichiro Makino f , Steve McMillan g , Onno R. Pols h , Peter J. Teuben i , Ronald F. Webbink j Institute for Advanced Study, Einstein Drive, Princeton, NJ 08540, USA Department of Astrophysics, American Museum of Natural History, New York, NY 10024, USA(More)
We suggest that the high–velocity clouds (HVCs) are large clouds, with typical diameters of 25 kpc and containing 5×107 solar masses of neutral gas and 3×108 solar masses of dark matter, falling onto the Local Group; altogether the HVCs contain 10 solar masses of neutral gas. Our reexamination of the Local–Group hypothesis for the HVCs connects their(More)
We use CO and Hα velocity fields to study the gas kinematics in the spiral arms and interarms of M51 (NGC 5194), and fit the 2D velocity field to estimate the radial and tangential velocity components as a function of spiral phase (arm distance). We find large radial and tangential streaming velocities, which are qualitatively consistent with the(More)
We compare the distribution of molecular gas and star formation activity in the bar region of six spirals (NGC 2903, NGC 3627, NGC 4321, NGC 5457, NGC 6946, & IC 342) from the BIMA Survey of Nearby Galaxies (SONG). The molecular gas, traced using the CO (J=1–0) emission line, is brightest along the leading edge of the stellar bar in the bar dust lanes. The(More)
We report results from a multiwavelength campaign to measure the simultaneous spectrum of the super-massive black hole candidate Sgr A* in the Galactic Center from cm to mm-wavelengths using the VLA, BIMA, the Nobeyama 45m, and the IRAM 30m telescopes. The observations confirm that the previously detected mmexcess is an intrinsic feature of the spectrum of(More)
We present Spitzer Space Telescope observations of the “evolved starless core” L1521F which reveal the presence of a very low luminosity object (L <0.07 L⊙). The object, L1521F-IRS, is directly detected at mid-infrared wavelengths (>5 μm) but only in scattered light at shorter infrared wavelengths, showing a bipolar nebula oriented east-west which is(More)