Kyler W. Kuehn

Epicyclic density variations in the Indus stellar stream

G. F. Lewis, Ting S Li, Sarah L. Martell, Denis Erkal et autres

ABSTRACT Longitudinal density fluctuations observed in stellar streams can result from gravitational interactions with massive perturbers in the Milky Way, such as dark matter subhaloes. Analysing these density variations provides a powerful probe of properties (motion, mass, size, etc.) of the perturbing …

au, ca, gb, us, ru, de (code pays fourni par la source)

Epicyclic Density Variations in the Indus Stellar Stream

Yong Yang, Geraint F. Lewis, Ting S. Li, Sarah L. Martell et autres

Longitudinal density fluctuations observed in stellar streams can result from gravitational interactions with massive perturbers in the Milky Way, such as dark matter subhalos. Analysing these density variations provides a powerful probe of properties (motion, mass, size, etc.) of the perturbing objects. …

Detailed Chemical Abundance Analysis of the Brightest Stars in the Turranburra and Willka Yaku Stellar Streams*

K. B. Webber, T. T. Hansen, J. L. Marshall, Alexander P. Ji et autres

Abstract We present a detailed chemical abundance analysis of the three brightest known stars from each of the Turranburra and Willka Yaku stellar streams using high-resolution Magellan/Magellan Inamori Kyocera Echelle spectra. Abundances for 27 elements, ranging from carbon to dysprosium, were derived. …

Chemodynamics of Boötes I with S 5 : Revised Velocity Gradient, Dark Matter Density, and Galactic Chemical Evolution Constraints

Nathan R. Sandford, Ting S. Li, Sergey E. Koposov, Kohei Hayashi et autres

Abstract We combine new spectroscopic observations of the ultrafaint dwarf (UFD) galaxy Boötes I (Boo I) from the Southern Stellar Stream Spectroscopic Survey ( S 5 ) with ∼15 yr of archival spectroscopic data to create the largest sample of stellar kinematics …

The Dark Energy Camera Data Acquisition and Control System

E. Buckley‐Geer, James T. Annis, Marco A. Bonati, J. Eiting et autres

Testing the Dark Energy Camera on a telescope simulator

H. Thomas Diehl, T. M. C. Abbott, J. Bailey, Marco A. Bonati et autres

The Dark Energy Camera is a new prime-focus instrument to be delivered to the Blanco 4-meter telescope at the Cerro Tololo Inter-American Observatory (CTIO) in 2011. Construction is in-progress at this time at Fermilab. In order to verify that the camera meets …

us, cl (code pays fourni par la source)

Status of the dark energy survey camera (DECam) project

B. Flaugher, T. M. C. Abbott, Jim Annis, J. E. Bailey et autres

The Dark Energy Survey Collaboration is building the Dark Energy Camera (DECam), a 3 square degree, 520 Megapixel CCD camera which will be mounted on the Blanco 4-meter telescope at CTIO. DECam will be used to perform the 5000 sq. deg. Dark …

us, cl, gb, es, br (code pays fourni par la source)

Graphical user interfaces of the dark energy survey

J. Eiting, Ann Elliott, K. Honscheid, Jim Annis et autres

The Dark Energy Survey (DES) is a 5000 square degree survey of the southern galactic cap set to take place on the Blanco 4-m telescope at Cerra Tololo Inter-American Observatory. A new 500 MP camera and control system are being developed for …

us, cl (code pays fourni par la source)

Physics and Operation of the AMANDA-II High Energy Neutrino Telescope

S. W. Barwick, Jürgen Ahrens, X. Bai, Thomas Becka et autres

This paper briefly describes the principle of operation and science goals of the AMANDA high energy neutrino telescope located at the South Pole, Antarctica. Results from an earlier phase of the telescope, called AMANDA-B10, demonstrate both reliable operation and the broad astrophysical …

us, de, be, se (code pays fourni par la source)