Results 101 to 110 of about 8,080,766 (192)

Galaxy disruption in a halo of dark matter

, 2003
The relics of disrupted satellite galaxies have been found around the Milky Way and Andromeda, but direct evidence of a satellite galaxy in the early stages of disruption has remained elusive. We have discovered a dwarf satellite galaxy in the process of
Duncan Forbes (18926341), Jean Brodie (18925636), Kenji Bekki (17948585), Jay Strader (13622248), Michael A. Beasley (12213134)   +4 more
core   +1 more source

Decoding the Galactic Twirl: The Downfall of Milky Way–Mass Galaxy Rotation Curves in the FIRE Simulations

The Astrophysical Journal
Recent measurements of the Milky Way rotation curve found a sharp decline at around 15–20 kpc from the center of the Galaxy, suggesting that the Galactic dark matter halo is much less massive than predicted by other dynamical tracers.
Xiaowei Ou, Lina Necib, Andrew Wetzel, Anna Frebel, Jeremy Bailin, Micah Oeur   +5 more
doaj   +1 more source

The odd primordial halo of the Milky Way implied by

Primordial dark matter halos are well understood from cold dark matter-only simulations. Since they can contract significantly as baryons settle into their centers, direct comparisons with observed galaxies are complicated.
François Hammer, Pengfei Li, Stacy S. McGaugh, Marcel S. Pawlowski, J. A. Sellwood, Hammer, Francois, Mcgaugh, Stacy S, Sellwood, J.A, Li, Pengfei, Pawlowski, Marcel S   +9 more
core   +1 more source

Diffuse Light in Milky Way–like Haloes

The Astrophysical Journal Letters
We investigate the diffuse light (DL) content of dark matter haloes in the mass range $11.5\leqslant \mathrm{log}{M}_{\mathrm{halo}}\leqslant 13$ , a range that also includes the dark matter halo of the Milky Way, taking advantage of a state-of-the-art ...
Emanuele Contini, San Han, Seyoung Jeon, Jinsu Rhee, Sukyoung K. Yi   +4 more
doaj   +1 more source

Geometry of the Milky Way’s dark matter from dynamical models of the tilted stellar halo

Monthly Notices of the Royal Astronomical Society
ABSTRACT The shape and orientation of the Milky Way’s dark matter halo remain poorly constrained. Observations of the accreted stellar halo show that it is triaxial and tilted with respect to the disc. If this configuration is long-lived, it can place constraints on the shape and orientation of the dark matter halo that can support it
Adam M Dillamore, Jason L Sanders
openaire   +2 more sources

Robust Measurement of Stellar Streams around the Milky Way: Correcting Spatially Variable Observational Selection Effects in Optical Imaging Surveys

The Astrophysical Journal
Observations of density variations in stellar streams are a promising probe of low-mass dark matter substructure in the Milky Way. However, survey systematics such as variations in seeing and sky brightness can also induce artificial fluctuations in the ...
K.K. Boone, P.S. Ferguson, M. Tabbutt, K. Bechtol, T.-Y. Cheng, A. Drlica-Wagner, C. E. Martínez-Vázquez, B. Mutlu-Pakdil, T. M. C. Abbott, M. Aguena, O. Alves, F. Andrade-Oliveira, D. Bacon, S. Bocquet, D. Brooks, R. Camilleri, A. Carnero Rosell, L. N. da Costa, M. E. da Silva Pereira, T. M. Davis, J. De Vicente, S. Desai, P. Doel, S. Everett, B. Flaugher, J. Frieman, J. García-Bellido, D. Gruen, G. Gutierrez, S. R. Hinton, D. L. Hollowood, K. Honscheid, D. J. James, K. Kuehn, J. L. Marshall, J. Mena-Fernández, F. Menanteau, R. Miquel, J. Myles, R. L. C. Ogando, A. A. Plazas Malagón, A. Porredon, M. Rodríguez-Monroy, E. Sanchez, D. Sanchez Cid, I. Sevilla-Noarbe, M. Smith, E. Suchyta, M. E. C. Swanson, V. Vikram, N. Weaverdyck, (DES Collaboration)   +51 more
doaj   +1 more source

A Model-independent Radio Telescope Dark Matter Search in the L and S Bands

The Astrophysical Journal Letters
Ultralight bosonic dark matter in its most general form can be detected through its decay or annihilation to a quasimonochromatic radio line. Assuming only that this line is consistent with the most general properties of the expected phase space of our ...
Aya Keller, Nicole Wolff, Karl van Bibber   +2 more
doaj   +1 more source

Millimeter-wave CO and SiO Observations toward the Broad-velocity-width Molecular Feature CO 16.134–0.553: A Smith Cloud Scenario?

The Astrophysical Journal
We report the results of the CO J = 1–0 and SiO J = 2–1 mapping observations toward the broad-velocity-width molecular feature (BVF) CO 16.134–0.553 with the Nobeyama Radio Observatory 45 m telescope.
Hiroki Yokozuka, Tomoharu Oka, Shiho Tsujimoto, Yuto Watanabe, Miyuki Kaneko   +4 more
doaj   +1 more source

Fuzzy Dark Matter and the Impact of Core–Halo Diversity on Its Particle Mass Constraints

The Astrophysical Journal
We investigate how diversity in the core–halo mass relation and the inclusion of higher-order velocity moments affect constraints on the fuzzy dark matter particle mass ( m _ψ ) inferred from the internal kinematics of dwarf galaxies.
Dafa Wardana, Kohei Hayashi, Masashi Chiba, Elisa G. M. Ferreira   +3 more
doaj   +1 more source

COZMIC. II. Cosmological Zoom-in Simulations with Fractional non-CDM Initial Conditions

The Astrophysical Journal
We present 24 cosmological dark matter (DM)-only zoom-in simulations of a Milky Way analog with initial conditions appropriate for scenarios where non-cold dark matter (NCDM) is a fraction of the total DM abundance (f-NCDM models) as the second ...
Rui An, Ethan O. Nadler, Andrew Benson, Vera Gluscevic   +3 more
doaj   +1 more source