Results 11 to 20 of about 145,586 (292)

Milky Way Mass Models and MOND [PDF]

, 2008
Using the Tuorla-Heidelberg model for the mass distribution of the Milky Way, I determine the rotation curve predicted by MOND. The result is in good agreement with the observed terminal velocities interior to the solar radius and with estimates of the ...
Angus G. W., Begeman K. G., Binney J., Binney J., Brada R., Broeils A. H., de Blok W. J. G., Famaey B., Famaey B., Feast M., Gerhard O., Hayashi E., Iorio L., Kerr F. J., Pointecouteau E., Sanders R. H., Stacy S. McGaugh   +16 more
core   +3 more sources

The Observable Properties of Galaxy Accretion Events in Milky Way–like Galaxies in the FIRE-2 Cosmological Simulations

The Astrophysical Journal, 2023
In the Λ-Cold Dark Matter model of the universe, galaxies form in part through accreting satellite systems. Previous works have built an understanding of the signatures of these processes contained within galactic stellar halos.
Danny Horta, Emily C. Cunningham, Robyn E. Sanderson, Kathryn V. Johnston, Nondh Panithanpaisal, Arpit Arora, Lina Necib, Andrew Wetzel, Jeremy Bailin, Claude-André Faucher-Giguère   +9 more
doaj   +1 more source

The R-Process Alliance: Chemodynamically Tagged Groups. II. An Extended Sample of Halo r-process-enhanced Stars

The Astrophysical Journal, 2023
Orbital characteristics based on Gaia Early Data Release 3 astrometric parameters are analyzed for ∼1700 r -process-enhanced (RPE; [Eu/Fe] > +0.3) metal-poor stars ([Fe/H] ≤ −0.8) compiled from the R -Process Alliance, the GALactic Archaeology with ...
Derek Shank, Timothy C. Beers, Vinicius M. Placco, Dmitrii Gudin, Thomas Catapano, Erika M. Holmbeck, Rana Ezzeddine, Ian U. Roederer, Charli M. Sakari, Anna Frebel, Terese T. Hansen   +10 more
doaj   +1 more source

Dense Gas in the Milky Way [PDF]

, 1996
We present a study of dense gas emission in the Milky Way in order to serve as a basis for comparison with extragalactic results. This study combines new observations of HCN, CS, and CO in individual GMCs and in the Milky Way plane with published studies
Leo Blitz, Liszt H. S., Tamara T. Helfer
core   +2 more sources

The Tilt of the Velocity Ellipsoid of Different Galactic Disk Populations

The Astrophysical Journal, 2023
The tilt of the velocity ellipsoid is a helpful tracer of the gravitational potential of the Milky Way. In this paper, we use nearly 140,000 red clump (RC) stars selected from LAMOST and Gaia to make a detailed analysis of the tilt of the velocity ...
Weixiang Sun, Han Shen, Xiaowei Liu
doaj   +1 more source

The connection between the host halo and the satellite galaxies of the Milky Way [PDF]

, 2016
Many properties of the Milky Way's dark matter halo, including its mass assembly history, concentration, and subhalo population, remain poorly constrained.
Benson, Andrew, Boylan-Kolchin, Michael, Lu, Yu, Mao, Yao-Yuan, Peter, Annika H. G., Tonnesen, Stephanie, Wechsler, Risa H., Wetzel, Andrew R.   +7 more
core   +3 more sources

Chemodynamical simulations of the Milky Way galaxy [PDF]

, 2011
We present chemodynamical simulations of a Milky-Way-type galaxy using a self-consistent hydrodynamical code that includes supernova feedback and chemical enrichment, and predict the spatial distribution of elements from oxygen to zinc.
Kobayashi, Chiaki, Nakasato, Naohito
core   +3 more sources

The Imprint of Clump Formation at High Redshift. II. The Chemistry of the Bulge

The Astrophysical Journal, 2023
In Paper I, we showed that clumps in high-redshift galaxies, having a high star formation rate density (Σ _SFR ), produce disks with two tracks in the [Fe/H]–[ α /Fe] chemical space, similar to that of the Milky Way’s (MW’s) thin+thick disks.
Victor P. Debattista, David J. Liddicott, Oscar A. Gonzalez, Leandro Beraldo e Silva, João A. S. Amarante, Ilin Lazar, Manuela Zoccali, Elena Valenti, Deanne B. Fisher, Tigran Khachaturyants, David L. Nidever, Thomas R. Quinn, Min Du, Susan Kassin   +13 more
doaj   +1 more source

Weighing the Milky Way

, 2002
We describe an experiment to measure the mass of the Milky Way galaxy. The experiment is based on calculated light travel times along orthogonal directions in the Schwarzschild metric of the Galactic center. We show that the difference is proportional to
Angelo Tartaglia, Ashby N, Ashfaque H Bokhari, Boyer R H, Dicke R M, Gron Ø, Hay H J, Krisher T P, Manasse F K, Martin J L, Moreau W, Munawar Karim, Ohanian H C, Synge J L, Taylor C T   +14 more
core   +1 more source

The X-shaped Bulge of the Milky Way revealed by WISE

, 2016
The Milky Way bulge has a boxy/peanut morphology and an X-shaped structure. This X-shape has been revealed by the `split in the red clump' from star counts along the line of sight toward the bulge, measured from photometric surveys.
Lang, Dustin, Ness, Melissa
core   +1 more source