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A Two Micron All Sky Survey view of the Sagittarius dwarf galaxy. II. Swope telescope spectroscopy of M giant stars in the dynamically cold Sagittarius tidal stream
kinematics halo
2014/12/24
We have obtained moderate resolution (~6 km s-1) spectroscopy of several hundred M giant candidates selected from Two Micron All Sky Survey photometry. Radial velocities are presented for stars mainly...
Another Look at the EBS: A Stellar Debris Stream and a Possible Progenitor
Another Look Stellar Debris Stream Possible Progenitor
2011/10/19
Using the Sloan Digital Sky Survey Data Release 7, we reexamine the Eastern Banded Structure (EBS), a stellar debris stream first discovered in Data Release 5 and more recently detected in velocity sp...
The multi-stream flows and the dynamics of the cosmic web
cosmic web cosmological simulations cosmic flows
2010/11/12
A new numerical technique to identify the cosmic web is proposed. It is based on locating multi-stream flows, i.e. the places where the velocity field is multi-valued. The method is local in Eulerian ...
Modeling Star counts in the Monoceros stream and the Galactic anti-centre
Galaxy – disc structure stellar content
2010/11/15
Context. There is a continued debate as to the form of the outer disc of the Milky Way galaxy,
which has important implications for its formation. Stars are known to exist at a galacto-centric distan...
Classification of field dwarfs and giants in RAVE and its use in stellar stream detection
Galaxy Astrophysics (astro-ph.GA)
2011/1/7
An efficient separation between dwarfs and giants in surveys of bright stars is important, especially for studies in which distances are estimated through photometric parallax relations.
Could the Hercules satellite be a stellar stream in the Milky Way halo?
Galaxy Astrophysics (astro-ph.GA)
2010/12/29
We investigate the possibility that Hercules, a recently discovered Milky Way (MW) satellite, is a stellar stream in the process of formation. This hypothesis is motivated by Hercules' highly elongate...
Rotation of the Milky Way and the formation of the Magellanic Stream
Cosmology and Extragalactic Astrophysics (astro-ph.CO)
2010/12/24
We studied the impact of the revisited values for the LSR circular velocity of the Milky Way (Reid et al. 2004) on the formation of the Magellanic Stream. The LSR circular velocity was varied within i...
Evolving Coronal Holes and Interplanetary Erupting Stream Disturbances
Sun coronal holes—interplanetary disturbances—interplanetary scintillation
2010/9/16
Coronal holes and interplanetary disturbances are important aspects of the physics of the Sun and heliosphere. Interplanetary disturbances are identified as an increase in the density turbulence compa...
THE SMALL-SCALE STRUCTURE OF THE MAGELLANIC STREAM AS A FOUNDATION FOR GALAXY EVOLUTION
Galaxy: halo Galaxies: evolution Magellanic Clouds Hydrodynamics Instabilities
2010/10/29
The Magellanic Stream (MS) is the nearest example of a gaseous
trail formed by interacting galaxies. While the substantial gas masses in these kinds
of circumgalactic structures are postulated to re...
Multi-Stream Inflation: Bifurcations and Recombinations in the Multiverse
inflationary multiverse Multi-Stream Inflation
2010/3/18
In this Letter, we briefly review the multi-stream inflation scenario, and discuss its implications in the string theory landscape and the inflationary multiverse. In multi-stream inflation, the infla...
Confirmation of halo substructure using quest rr lyrae data：the new virgo stellar stream (VSS)
halo substructure virgo stellar rr lyrae data
2009/6/25
Confirmation of halo substructure using quest rr lyrae data：the new virgo stellar stream (VSS)。
Hydrodynamic models of the accretion stream in Magnetic cataclysmic variables
Hydrodynamic models Magnetic cataclysmic variables
2009/6/17
Hydrodynamic models of the accretion stream in Magnetic cataclysmic variables。
Spectroscopic diagnostics of precessing discs：the Stream-disc impact in xtej1118+480 (= kV uma) in outburst
Spectroscopic diagnostics precessing discs xtej1118+480
2009/6/17
Spectroscopic diagnostics of precessing discs：the Stream-disc impact in xtej1118+480 (= kV uma) in outburst。
Evolving Coronal Holes and Interplanetary Erupting Stream Disturbances
Sun:coronal holes interplanetary disturbances interplanetary scintillation
2009/5/7
Coronal holes and interplanetary disturbances are important aspects of the physics of the Sun and heliosphere. Interplanetary disturbances are identified as an increase in the density turbulence comp...