Results 101 to 110 of about 247,055 (324)

The structure and dynamical evolution of the stellar disc of a simulated Milky Way-mass galaxy [PDF]

, 2016
We study the structure, age and metallicity gradients, and dynamical evolution using a cosmological zoom-in simulation of a Milky Way-mass galaxy from the Feedback in Realistic Environments project.
Xiangcheng Ma, P. Hopkins, A. Wetzel, E. Kirby, D. Anglés-Alcázar, C. Faucher-Giguére, D. Keres̆, Eliot Quataert Caltech, Northwestern, Ucsd, Berkeley   +10 more
semanticscholar   +1 more source

The Chemical Evolution of the Milky Way in a cosmological context [PDF]

EAS Publications Series, 2007
A short overview is presented of several topics concerning the evolution of the Milky Way (MW) in a cosmological context. In particular, the metallicity distribution of the MW halo is derived analytically and the halo metallicity and abundance patterns are compared to those of Local Group galaxies.
openaire   +2 more sources

THE EVOLUTION OF OXYGEN AND MAGNESIUM IN THE BULGE AND DISK OF THE MILKY WAY [PDF]

The Astronomical Journal, 2008
We show that the Galactic bulge and disk share a similar, strong, decline in [O/Mg] ratio with [Mg/H]. The similarity of the [O/Mg] trend in these two, markedly different, populations suggests a metallicity-dependent modulation of the stellar yields from massive stars, by mass loss from winds, and related to the Wolf-Rayet phenomenon, as proposed by ...
MCWILLIAM A, MATTEUCCI, MARIA FRANCESCA, BALLERO S, RICH R. M, FULBRIGHT J. P, CESCUTTI G.   +5 more
openaire   +3 more sources

HIV‐1 establishes immediate latency in T cells expressing the viral Nef protein

FEBS Open Bio, EarlyView.
Nef is a viral protein often omitted from HIV‐1 reporter viruses. Consequently, its role in viral latency is unclear. We developed three novel dual reporter HIV‐1 derivatives that express Nef and allow for detection of latent and productive infection. Using these reporters, we show that Nef does not affect the establishment of immediate viral latency ...
Cindy Lam, Ivan Sadowski
wiley   +1 more source

Dissipationless Formation and Evolution of the Milky Way Nuclear Star Cluster

, 2012
Abridged: In one widely discussed model for the formation of nuclear star clusters (NSCs), massive globular clusters spiral into the center of a galaxy and merge to form the nucleus. It is now known that at least some NSCs coexist with supermassive black
Agarwal, Alessandra Mastrobuono-Battisti, Antonini, Bartko, Bekki, Böker, Carollo, Charbonnel, Côté, David Merritt, Do, Ebisuzaki, Emsellem, Fabio Antonini, Ferrarese, Figer, Figer, Gebhardt, Genzel, Ghez, Gillessen, Gualandris, Hashimoto, Haşegan, Ibata, Jordán, Lauer, Loose, Lotz, Makino, Matthews, Merritt, Merritt, Merritt, Meynet, Milosavljević, Miocchi, Murali, Ostriker, Pesce, Pfuhl, Poon, Portegies Zwart, Roberto Capuzzo-Dolcetta, Rosenberg, Saha, Schaerer, Schaerer, Schaller, Schinnerer, Schinnerer, Schödel, Schödel, Seth, Seth, Sjouwerman, Spitzer, Takahashi, Wehner, Zhao   +59 more
core   +1 more source

Dynamical stability and evolution of the discs of Sc galaxies [PDF]

, 1997
We examine the local stability of galactic discs against axisymmetric density perturbations with special attention to the different dynamics of the stellar and gaseous components. In particular the discs of the Milky Way and of NGC 6946 are studied.
Fuchs, B., von Linden, S.
core   +3 more sources

Chemical evolution of the Galactic bulge as traced by microlensed dwarf and subgiant stars. VI. Age and abundance structure of the stellar populations in the central sub-kpc of the Milky Way [PDF]

, 2017
We present a detailed elemental abundance study of 90 F and G dwarf, turn-off and subgiant stars in the Galactic bulge. Based on high-resolution spectra acquired during gravitational microlensing events, stellar ages and abundances for 11 elements (Na ...
T. Bensby, S. Feltzing, Alan Gould, Alan Gould, Alan Gould, J. Yee, Julie A. Johnson, M. Asplund, J. Meléndez, S. Lucatello, L. Howes, A. McWilliam, A. Udalski, M. Szymański, I. Soszyński, R. Poleski, R. Poleski, Ł. Wyrzykowski, K. Ulaczyk, K. Ulaczyk, S. Kozłowski, P. Pietrukowicz, J. Skowron, P. Mróz, M. Pawlak, F. Abe, Y. Asakura, A. Bhattacharya, I. Bond, D. Bennett, Y. Hirao, M. Nagakane, N. Koshimoto, T. Sumi, D. Suzuki, P. Tristram   +35 more
semanticscholar   +1 more source

Contrasting copper evolution in ω Centauri and the Milky Way [PDF]

Monthly Notices of the Royal Astronomical Society: Letters, 2007
Abstract Despite the many studies on stellar nucleosynthesis published so far, the scenario for the production of copper in stars remains elusive. In particular, it is still debated whether copper originates mostly in massive stars or in Type Ia supernovae.
Romano, Donatella, Matteucci, Francesca
openaire   +2 more sources

Anchorage‐independent and faster growth in clonal population from UV‐irradiated NER‐deficient cells

FEBS Open Bio, EarlyView.
UV‐irradiated cells expressing a DDB2 mutant protein unable to interact with PCNA (DDB2PCNA‐) form clones able to grow without anchorage. Different experimental approaches reveal heterogeneity in cell cycle regulation and drug response within these clones, emphasizing the crucial role of the DDB2‐PCNA interaction in preventing cellular transformation ...
Paola Perucca, Anna Tricarico, Martina Furfaro, Priyam Ghosh, Ennio Prosperi, Lucia Anna Stivala, Ornella Cazzalini   +6 more
wiley   +1 more source

An Inward-moving and Asymmetric Velocity Wave Detected in LAMOST-Gaia

The Astrophysical Journal Letters
The phase space, as coded by kinematic parameters and chemical abundances, is crucial for understanding the formation of the Galactic disk. Using red giant stars from the Galactic thin disk with [Fe/H] > − 0.8 and low- α ratios identified in LAMOST-Gaia,
Yuqin Chen, Gang Zhao, Wenbo Wu, Zixi Guo, Haopeng Zhang, Zhuohan Li   +5 more
doaj   +1 more source