Results 61 to 70 of about 8,080,766 (192)

On the Corotation of Milky Way Satellites: LMC-mass Satellites Induce Apparent Motions in Outer Halo Tracers

The Astrophysical Journal
Understanding the physical mechanism behind the formation of a corotating thin plane of satellite galaxies, like the one observed around the Milky Way (MW), has been challenging.
Nicolás Garavito-Camargo, Adrian M. Price-Whelan, Jenna Samuel, Emily C. Cunningham, Ekta Patel, Andrew Wetzel, Kathryn V. Johnston, Arpit Arora, Robyn E. Sanderson, Lehman Garrison, Danny Horta   +10 more
doaj   +1 more source

Observational constrains on the Sgr A* black hole immersed in a dark matter halo: Shadow and S2 star orbit

Astronomy & Astrophysics
Context. It is widely believed that Sgr A*, located at the center of the Milky Way, is a supermassive black hole. Recent observations of its shadow by the Event Horizon Telescope and long-term monitoring of the S2 star orbit have provided strong evidence
Li Zhen
doaj   +1 more source

AuriDESI: mock catalogues for the DESI Milky Way Survey [PDF]

The Dark Energy Spectroscopic Instrument Milky Way Survey (DESI MWS) will explore the assembly history of the Milky Way by characterizing remnants of ancient dwarf galaxy accretion events and improving constraints on the distribution of dark matter in ...
de la Macorra, Axel, Ahlen, Steven, Claybaugh, Todd, Meisner, Aaron, Koposov, Sergey E, Rezaie, Mehdi, Zhou, Zhimin, Manera, Marc, Grand, Robert J J, Kizhuprakkat, Namitha, Honscheid, Klaus, Cooper, Andrew P, Dawson, Kyle, Schubnell, Michael, Tarlé, Gregory, Brooks, David, Landriau, Martin, Allende Prieto, Carlos, Seo, Hee-Jong, Nie, Jundan, Rossi, Graziano, Valluri, Monica, Miquel, Ramon, Gaztañaga, Enrique, Gontcho A Gontcho, Satya, Frenk, Carlos, Prada, Francisco, Sanchez, Eusebio, Kehoe, Robert, Aguilar, Jessica Nicole, Gnedin, Oleg Y, Riley, Alexander H, Doel, Peter, Forero-Romero, Jaime E, de la Macorra, A, Riley, Alexander H., Grand, Robert J. J., Grand, RJJ, Gaztañaga, E, Cooper, AP, Zhou, Z, Forero-Romero, JE, Prada, F, Miquel, R, Claybaugh, T, Schubnell, M, Seo, HJ, Manera, M, Forero-Romero, Jaime E., Koposov, SE, Frenk, C, Gnedin, Oleg Y., Honscheid, K, Sanchez, E, Gnedin, OY, Landriau, M, Rezaie, M, Nie, J, Prieto, Carlos Allende, Kehoe, R, Prieto, CA, Cooper, Andrew P., Tarlé, G, Brooks, D, Doel, P, Gontcho, SGA, Kizhuprakkat, N, Meisner, A, Koposov, Sergey E., Dawson, K, Valluri, M, Ahlen, S, Gontcho, Satya Gontcho A, Rossi, G, Aguilar, JN, Riley, AH   +75 more
core   +1 more source

Minimum-entropy Constraints on Galactic Potentials

The Astrophysical Journal
A tracer sample in a gravitational potential, starting from a generic initial condition, phase-mixes toward a stationary state. This evolution is accompanied by an entropy increase, and the final state is characterized by a distribution function (DF ...
Leandro Beraldo e Silva, Monica Valluri, Eugene Vasiliev, Kohei Hattori, Walter de Siqueira Pedra, Kathryne J. Daniel   +5 more
doaj   +1 more source

Dark matter constraints from wide halo binary stars

, 2010
We report on a recent re-examination of dark matter constraints from halo wide stellar binaries, motivated by observations we made of four of the very wide binary candidates on which earlier constraints were based.
Koch, Andreas, Wilkinson, M. I., Irwin, Michael J., Marshall, J., Belokurov, V., Quinn, D. P.   +5 more
core   +2 more sources

Semianalytic Modeling of Dark Matter Subhalo Encounters with Thin Stellar Streams: Statistical Predictions for GD-1-like Streams in Cold Dark Matter

The Astrophysical Journal
Stellar streams from disrupted globular clusters are dynamically cold structures that are sensitive to perturbations from dark matter subhalos, allowing them in principle to trace the dark matter substructure in the Milky Way.
Duncan K. Adams, Aditya Parikh, Oren Slone, Rouven Essig, Manoj Kaplinghat, Adrian M. Price-Whelan   +5 more
doaj   +1 more source

Constraining the Tilt of the Milky Way's Dark Matter Halo with the Sagittarius Stream

, 2022
Recent studies have suggested that the Milky Way (MW)'s Dark Matter (DM) halo may be significantly tilted with respect to its central stellar disk, a feature that might be linked to its formation history. In this work, we demonstrate a method of constraining the orientation of the minor axis of the DM halo using the angle and frequency variables.
Panithanpaisal, Nondh, Sanderson, Robyn E., Arora, Arpit, Cunningham, Emily C., Baptista, Jay   +4 more
openaire   +2 more sources

Bright gamma-ray Galactic Center excess and dark dwarfs: Strong tension for dark matter annihilation despite Milky Way halo profile and diffuse emission uncertainties [PDF]

, 2016
We incorporate Milky Way dark matter halo profile uncertainties, as well as an accounting of diffuse gamma-ray emission uncertainties in dark matter annihilation models for the Galactic Center Extended gamma-ray excess (GCE) detected by the Fermi Gamma ...
Keeley, Ryan E, Abazajian, Kevork N
core   +1 more source

Infall of substructures on to a Milky Way-like dark halo [PDF]

, 2008
We analyse the dynamical properties of substructures in a high-resolution dark matter simulation of the formation of a Milky Way-like halo in a CDM cosmology.
Li, Yang-Shyang, Helmi, Amina
core   +1 more source

Bar-driven Streaming Motions Mimic a Massive Bulge in the Inner Milky Way

The Astrophysical Journal
The circular speed curve of the Milky Way provides a key constraint on its mass distribution, reflecting the axisymmetric component of the gravitational potential.
Junichi Baba
doaj   +1 more source