Search Results - "EVANS, N. W"

Dark matter cores and cusps: the case of multiple stellar populations in dwarf spheroidals by Amorisco, N. C., Evans, N. W.

“…A number of dwarf spheroidal (dSph) galaxies are known to contain a more extended, metal-poor population with a flattish velocity dispersion profile, and a…”
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The Milky Way stellar halo out to 40kpc: squashed, broken but smooth by Deason, A. J, Belokurov, V, Evans, N. W

“…ABSTRACT We introduce a new maximum-likelihood method to model the density profile of blue horizontal branch and blue straggler stars and apply it to the Sloan…”
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Tidal disruption of dwarf spheroidal galaxies: the strange case of Crater II by Sanders, Jason L, Evans, N W, Dehnen, W

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The total mass of the Large Magellanic Cloud from its perturbation on the Orphan stream by Erkal, D, Belokurov, V, Laporte, C F P, Koposov, S E, Li, T S, Grillmair, C J, Kallivayalil, N, Price-Whelan, A M, Evans, N W, Hawkins, K, Hendel, D, Mateu, C, Navarro, J F, del Pino, A, Slater, C T, Sohn, S T

“…In a companion paper by Koposov et al., RR Lyrae from Gaia Data Release 2 are used to demonstrate that stars in the Orphan stream have velocity vectors…”
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The hidden giant: discovery of an enormous Galactic dwarf satellite in Gaia DR2 by Torrealba, G, Belokurov, V, Koposov, S E, Li, T S, Walker, M G, Sanders, J L, Geringer-Sameth, A, Zucker, D B, Kuehn, K, Evans, N W, Dehnen, W

“…We report the discovery of a Milky Way satellite in the constellation of Antlia. The Antlia 2 dwarf galaxy is located behind the Galactic disc at a latitude of…”
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Dynamical Relics of the Ancient Galactic Halo by Yuan, Zhen, Myeong, G. C., Beers, Timothy C., Evans, N. W., Lee, Young Sun, Banerjee, Projjwal, Gudin, Dmitrii, Hattori, Kohei, Li, Haining, Matsuno, Tadafumi, Placco, Vinicius M., Smith, M. C., Whitten, Devin D., Zhao, Gang

“…We search for dynamical substructures in the LAMOST DR3 very metal-poor (VMP) star catalog. After cross-matching with Gaia DR2, there are ∼3300 VMP stars with…”
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Haloes light and dark: dynamical models of the stellar halo and constraints on the mass of the Galaxy by Williams, A. A., Evans, N. W.

“…We develop a flexible set of action-based distribution functions (DFs) for stellar haloes. The DFs have five free parameters, controlling the inner and outer…”
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Piercing the Milky Way: an all-sky view of the Orphan Stream by Koposov, S E, Belokurov, V, Li, T S, Mateu, C, Erkal, D, Grillmair, C J, Hendel, D, Price-Whelan, A M, Laporte, C F P, Hawkins, K, Sohn, S T, del Pino, A, Evans, N W, Slater, C T, Kallivayalil, N, Navarro, J F

“…Abstract We use astrometry, broad-band photometry, and variability information from the Data Release 2 of ESA’s Gaia mission (GDR2) to identify members of the…”
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The remnant of a merger between two dwarf galaxies in Andromeda II by Amorisco, N. C., Evans, N. W., van de Ven, G.

“…At the lowest galactic mass scales, evidence of a merger between two galaxies is provided by the kinematic detection of a stellar stream — indicative of an…”
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Broken degeneracies: the rotation curve and velocity anisotropy of the Milky Way halo by Deason, A. J., Belokurov, V., Evans, N. W., An, J.

“…ABSTRACT We use distant blue horizontal branch stars with Galactocentric distances 16 < r < 48 kpc as kinematic tracers of the Milky Way dark halo. We model…”
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ATLAS lifts the Cup: discovery of a new Milky Way satellite in Crater by Belokurov, V., Irwin, M. J., Koposov, S. E., Evans, N. W., Gonzalez-Solares, E., Metcalfe, N., Shanks, T.

“…We announce the discovery of a new Galactic companion found in data from the ESO VST ATLAS survey, and followed up with deep imaging on the 4-m William…”
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Rotation of halo populations in the Milky Way and M31 by Deason, A. J., Belokurov, V., Evans, N. W.

“…We search for signs of rotation in the subsystems of the Milky Way and M31 that are defined by their satellite galaxies, their globular cluster populations and…”
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The discovery of Segue 2: a prototype of the population of satellites of satellites by Belokurov, V., Walker, M. G., Evans, N. W., Gilmore, G., Irwin, M. J., Mateo, M., Mayer, L., Olszewski, E., Bechtold, J., Pickering, T.

“…We announce the discovery of a new Milky Way satellite Segue 2 found in the data of the Sloan Extension for Galactic Understanding and Exploration (SEGUE). We…”
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The Accretion Origin of the Milky Way's Stellar Halo by Bell, Eric F, Zucker, Daniel B, Belokurov, Vasily, Sharma, Sanjib, Johnston, Kathryn V, Bullock, James S, Hogg, David W, Jahnke, Knud, de Jong, Jelte T. A, Beers, Timothy C, Evans, N. W, Grebel, Eva K, Ivezić, Željko, Koposov, Sergey E, Rix, Hans-Walter, Schneider, Donald P, Steinmetz, Matthias, Zolotov, Adi

“…We have used data from the Sloan Digital Sky Survey (SDSS) Data Release 5 to explore the overall structure and substructure of the stellar halo of the Milky…”
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Phase-space models of the dwarf spheroidals by Amorisco, N. C., Evans, N. W.

“…This paper introduces new phase-space models of dwarf spheroidal galaxies (dSphs). The stellar component has an isotropic, lowered isothermal (or King)…”
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Balancing mass and momentum in the Local Group by Diaz, J. D., Koposov, S. E., Irwin, M., Belokurov, V., Evans, N. W.

“…In the rest frame of the Local Group (LG), the total momentum of the Milky Way (MW) and Andromeda (M31) should balance to zero. We use this fact to constrain…”
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Kinematics of SDSS subdwarfs: structure and substructure of the Milky Way halo by Smith, M. C., Evans, N. W., Belokurov, V., Hewett, P. C., Bramich, D. M., Gilmore, G., Irwin, M. J., Vidrih, S., Zucker, D. B.

“…We construct a new sample of ∼1700 solar neighbourhood halo subdwarfs from the Sloan Digital Sky Survey (SDSS), selected using a reduced proper-motion diagram…”
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The Field of Streams: Sagittarius and Its Siblings by Belokurov, V, Zucker, D. B, Evans, N. W, Gilmore, G, Vidrih, S, Bramich, D. M, Newberg, H. J, Wyse, R. F. G, Irwin, M. J, Fellhauer, M, Hewett, P. C, Walton, N. A, Wilkinson, M. I, Cole, N, Yanny, B, Rockosi, C. M, Beers, T. C, Bell, E. F, Brinkmann, J, Ivezić, Ž, Lupton, R

“…We use Sloan Digital Sky Survey (SDSS) Data Release 5 (DR5) u, g, r, i, z photometry to study Milky Way halo substructure in the area around the north Galactic…”
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Dynamical models of elliptical galaxies – I. Simple methods by Agnello, A., Evans, N. W., Romanowsky, A. J.

“…We study dynamical models for elliptical galaxies, deriving the projected kinematic profiles in a form that is valid for general surface brightness laws and…”
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Re-Assembling the Sagittarius Dwarf Galaxy by Niederste-Ostholt, M, Belokurov, V, Evans, N. W, Peñarrubia, J

“…What was the mass of the progenitor of the Sagittarius (Sgr) dwarf galaxy? Here, we reassemble the stellar debris using Sloan Digital Sky Survey and Two Micron…”
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