Zobrazeno 1 - 10
of 3 392
pro vyhledávání: '"Evans, N A"'
Autor:
Gallenne, A., Evans, N. R., Kervella, P., Monnier, J. D., Proffitt, C. R, Schaefer, G. H., Winston, E. M., Kuraszkiewicz, J., Mérand, A., Pietrzyński, G., Gieren, W., Pilecki, B., Kraus, S., Bouquin, J-B Le, Anugu, N., Brummelaar, T. ten, Chhabra, S., Codron, I., Davies, C. L., Ennis, J., Gardner, T., Gutierrez, M., Ibrahim, N., Lanthermann, C., Mortimer, D., Setterholm, B. R.
Cepheid masses are particularly necessary to help solving the mass discrepancy, while independent distance determinations provide crucial test of the period-luminosity relation and Gaia parallaxes. We used CHARA/MIRC to measure the astrometric positi
Externí odkaz:
http://arxiv.org/abs/2411.06647
Autor:
Davies, Elliot Y., Belokurov, Vasily, Kravtsov, Andrey, Monty, Stephanie, Myeong, GyuChul, Evans, N. Wyn, Kane, Sarah G.
The stellar halo of the Milky Way comprises an abundance of chemical signatures from accretion events and \textit{in-situ} evolution, that form an interweaving tapestry in kinematic space. To untangle this, we consider the mixtures of chemical inform
Externí odkaz:
http://arxiv.org/abs/2410.21365
Autor:
Zhang, Hanyuan, Belokurov, Vasily, Evans, N. Wyn, Li, Zhao-Yu, Sanders, Jason L., Ardern-Arentsen, Anke
We present a novel method to constrain the formation time of the Milky Way disc using the chrono-kinematic signatures of the inner Galaxy. We construct an O-rich Mira variable sample from the Gaia Long-period Variable catalogue to study the kinematic
Externí odkaz:
http://arxiv.org/abs/2408.16815
We use low-amplitude, long period variable (LA-LPV) candidates in \textit{Gaia} DR3 to trace the kinematics and dynamics of the Milky Way bar. LA-LPVs, like other LPVs, are intrinsically bright and follow a tight period-luminosity relation, but unlik
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
This Letter develops a method to constrain the Cosmological Constant $\Lambda$ from binary galaxies, focusing on the Milky Way and Andromeda. We provide an analytical solution to the two-body problem with $\Lambda$ and show that the ratio between the
Externí odkaz:
http://arxiv.org/abs/2306.14963