Results 51 to 60 of about 30,171 (324)

The stellar halo in the inner Milky Way: predicted shape and kinematics [PDF]

Monthly Notices of the Royal Astronomical Society: Letters, 2016
Abstract We have used N-body simulations for the Milky Way to investigate the kinematic and structural properties of the old metal-poor stellar halo in the barred inner region of the Galaxy. We find that the extrapolation of the density distribution for bulge RR Lyrae stars, ρ ∼ r−3, approximately matches the number density of RR Lyrae ...
Matthieu Portail, Angeles Pérez-Villegas, Ortwin Gerhard   +2 more
openaire   +3 more sources

Cosmological insights into the assembly of the radial and compact stellar halo of the Milky Way [PDF]

Monthly Notices of the Royal Astronomical Society, 2020
ABSTRACT Recent studies using Gaia DR2 have identified a massive merger in the early history of the Milky Way (MW) whose debris is dominated by radial and counterrotating orbits. This event, dubbed the Gaia-Enceladus/Gaia-Sausage (GE/GS), is also hypothesized to have built the majority of the inner stellar halo.
Lars Hernquist, Amina Helmi, Laura V Sales, Lydia M Elias   +3 more
openaire   +4 more sources

Assembly of the outer Galactic stellar halo in the hierarchical model

, 2010
We provide a set of numerical N-body simulations for studying the formation of the outer Milky Ways's stellar halo through accretion events. After simulating minor mergers of prograde and retrograde orbiting satellite halo with a Dark Matter main halo ...
Adelman-McCarthy, Belokurov, Binney, Boylan-Kolchin, Bullock, Chiba, Curir, Grillmair, Huang, Miceli, Moore, Navarro, Press, White, Yanny, Zolotov   +15 more
core   +1 more source

The Dichotomy of the Halo of the Milky Way

, 2008
We summarize evidence that the halo of the Milky Way comprises two different, and broadly overlapping, stellar components. The two structures exhibit different chemical compositions, spatial distributions, and kinematics.
Akira Ohnishi, Daniela Carollo, Kiyoshi Kato, Masayuki Y. Fujimoto, Shigeru Kubono, Takaya Nozawa, Takuma Suda, Timothy C. Beers, Toshitaka Kajino   +8 more
core   +1 more source

Are dSph galaxies Galactic building blocks?

EPJ Web of Conferences, 2012
Dwarf spheroidal galaxies (dSph) are frequently assumed to represent surviving examples of a vast now destroyed population of small systems in which many of the stars now forming the Milky Way were formed. Ongoing accretion and considerable sub-structure
Gilmore G., Asiri H.M.
doaj   +1 more source

The stability of stellar discs in Milky Way-sized dark matter haloes [PDF]

Monthly Notices of the Royal Astronomical Society, 2015
22 pages, 23 figures, 1 tables. Accepted for publication in MNRAS.
Volker Springel, Volker Springel, Denis Yurin, Denis Yurin   +3 more
openaire   +3 more sources

The Age of the Milky Way Inner Halo

, 2012
The Milky Way galaxy is observed to have multiple components with distinct properties, such as the bulge, disk, and halo. Unraveling the assembly history of these populations provides a powerful test to the theory of galaxy formation and evolution, but ...
A Dotter, A Dotter, A Dotter, A Renzini, A Sarajedini, A Zolotov, AS Font, B Paczyński, BR Oppenheimer, D Carollo, DR Soderblom, E Gates, E-M Pauli, G Wegner, Jason S. Kalirai, JS Kalirai, JS Kalirai, JS Kalirai, JS Kalirai, LR Bedin, M Kilic, P Bergeron, P Jofré, P-E Tremblay, P-E Tremblay, R Napiwotzki, S Moehler, SL Shapiro, TC Beers   +28 more
core   +1 more source

A mass-dependent density profile for dark matter haloes including the influence of galaxy formation [PDF]

, 2014
We introduce a mass-dependent density profile to describe the distribution of dark matter within galaxies, which takes into account the stellar-to-halo mass dependence of the response of dark matter to baryonic processes.
Aaron A. Dutton, Agertz, Alexander Knebe, Andrea V. Macciò, Arianna Di Cintio, Battaglia, Blumenthal, Brook, Brook, Brook, Bullock, Catena, Chabrier, Chris B. Brook, Cole, de Blok, de Blok, Deason, Del Popolo, Del Popolo, Di Cintio, Di Cintio, Duffy, Dutton, Dutton, Dutton, Dutton, El-Zant, Freyer, Gao, Gill, Gnedin, Goerdt, Goerdt, Governato, Governato, Greg S. Stinson, Guo, Hernquist, Jaffe, Kannan, Kannan, Katz, Kay, Kennicutt, Knollmann, Kuzio de Naray, Kuzio de Naray, Macciò, Macciò, Macciò, Martizzi, Mashchenko, Merritt, Mo, Moore, Moster, Muñoz-Cuartas, Navarro, Navarro, Navarro, Navarro, Nesti, Obreja, Oh, Peñarrubia, Pontzen, Pontzen, Power, Prada, Read, Read, Romano-Díaz, Salucci, Schmidt, Shen, Simon, Spergel, Springel, Stinson, Stinson, Stinson, Teyssier, Tonini, Wadsley, Walker, Zolotov   +86 more
core   +2 more sources

From lactation to malignancy: A comparison between healthy and cancerous breast gland at single‐cell resolution reveals new issues for tumorigenesis

FEBS Letters, EarlyView.
Single‐cell RNA sequencing reveals an opposite role of SLPI in basal tumors based on metastatic spread, along with shared activation of specific regulons in cancer cells and mature luminal lactocytes, as well as downregulation of MALAT1 and NEAT1 in the latter.
Pietro Ancona, Carlo M. Bergamini, Carlo Ferrari, Stefano Volinia, Nicoletta Bianchi   +4 more
wiley   +1 more source

Constraining the Milky Way halo potential with the GD-1 stellar stream [PDF]

Monthly Notices of the Royal Astronomical Society, 2019
Abstract We use ESA/Gaia astrometry together with SEGUE and LAMOST measurements of the GD-1 stellar stream to explore the improvement on the Galactic gravitational potential that these new data provide. Assuming a realistic universal model for the dark matter halo together with reasonable models of the baryonic components, we find that ...
Khyati Malhan, Khyati Malhan, Rodrigo A. Ibata   +2 more
openaire   +3 more sources