Zobrazeno 1 - 10
of 378
pro vyhledávání: '"Evans, N. Wyn"'
We take low-amplitude, long period variable (LA-LPV) candidates in Gaia DR3 as tracers of the kinematics and dynamics of the Milky Way bar. LA-LPVs, like other LPVs, have high luminosities and follow a tight period-luminosity relation, but unlike e.g
Externí odkaz:
http://arxiv.org/abs/2406.06678
We search for globular clusters (GCs) trapped in resonances with the bar of the Milky Way. By integrating their orbits in a potential with a decelerating bar, we select 10 whose orbits are significantly changed by its presence. Most of these are trap
Externí odkaz:
http://arxiv.org/abs/2405.14933
Overdensities in the radial phase space $(r,v_r)$ of the Milky Way's halo have previously been associated with the phase-mixed debris of a highly radial merger event, such as Gaia Sausage-Enceladus. We present and test an alternative theory in which
Externí odkaz:
http://arxiv.org/abs/2402.14907
Autor:
Kaczmarek, Zofia, McGill, Peter, Evans, N. Wyn, Smith, Leigh C., Golovich, Nathan, Kerins, Eamonn, Specht, David, Dawson, William A.
We analyze 1602 microlensing events found in the VISTA Variables in the Via Lactea (VVV) near-infrared (NIR) survey data. We obtain spatially-resolved, efficiency-corrected timescale distributions across the Galactic bulge ($|\ell|<10^\circ,$ $|b|<5^
Externí odkaz:
http://arxiv.org/abs/2312.11667
Disrupted dwarf binary merger as the possible origin of NGC 2419 and Sagittarius stream substructure
Using $N$-body simulations, we demonstrate that satellite dwarf galaxy pairs which undergo significant mixing ($\sim 6$ Gyr) can have their respective most bound particles separated great distances upon subsequently merging with a more massive host.
Externí odkaz:
http://arxiv.org/abs/2308.01958
Motivated by the LMC's impact on the integral of motion space of the stellar halo, we run an $N$-body merger simulation to produce a population of halo-like stars. We subsequently move to a test particle simulation, in which the LMC perturbs this deb
Externí odkaz:
http://arxiv.org/abs/2307.00042
Using data from the Gaia satellite's Radial Velocity Spectrometer Data Release 3 (RVS, DR3), we find a new and robust feature in the phase space distribution of halo stars. It is a prominent ridge at constant energy and with angular momentum $L_z>0$.
Externí odkaz:
http://arxiv.org/abs/2303.00008
Autor:
Monty, Stephanie, Yong, David, Massari, Davide, McKenzie, Madeleine, Myeong, GyuChul, Buder, Sven, Karakas, Amanda I., Freeman, Ken C., Marino, Anna F., Belokurov, Vasily, Evans, N. Wyn
The assembly history of the Milky Way (MW) is a rapidly evolving subject, with numerous small accretion events and at least one major merger proposed in the MW's history. Accreted alongside these dwarf galaxies are globular clusters (GCs), which act
Externí odkaz:
http://arxiv.org/abs/2302.06644
We report a correlation between the presence of a Gaia-Sausage-Enceladus (GSE) analogue and dark matter halo spin in the ARTEMIS simulations of Milky Way-like galaxies. The haloes which contain a large population of accreted stars on highly radial or
Externí odkaz:
http://arxiv.org/abs/2211.01378
Publikováno v:
MNRS L Volume 518, Issue 1, January 2023, Pages L51-L56
Future Gaia and Legacy Survey of Space and Time data releases, together with wide area spectroscopic surveys, will deliver large samples of resolved binary stars with phase space coordinates, albeit with low-cadence. Given an eccentricity law $f(\eps
Externí odkaz:
http://arxiv.org/abs/2210.06429