Results 91 to 100 of about 82,088 (313)

The Three-phase Evolution of the Milky Way

The Astrophysical Journal
We illustrate the formation and evolution of the Milky Way over cosmic time, utilizing a sample of 10 million red giant stars with full chemodynamical information, including metallicities and α -abundances from low-resolution Gaia XP spectra.
Vedant Chandra, Vadim A. Semenov, Hans-Walter Rix, Charlie Conroy, Ana Bonaca, Rohan P. Naidu, René Andrae, Jiadong Li, Lars Hernquist   +8 more
doaj   +1 more source

Are Disks of Satellites Comprised of Tidal Dwarf Galaxies?

Galaxies, 2021
It was found that satellites of nearby galaxies can form flattened co-rotating structures called disks of satellites or planes of satellites. Their existence is not expected by the current galaxy formation simulations in the standard dark matter-based ...
Michal Bílek, Ingo Thies, Pavel Kroupa, Benoit Famaey   +3 more
doaj   +1 more source

THE VERTICAL METALLICITY GRADIENT OF THE MILKY WAY DISK: TRANSITIONS IN [α/Fe] POPULATIONS [PDF]

, 2014
Using G dwarfs from the Sloan Extension for Galactic Understanding and Exploration (SEGUE) survey, we have determined the vertical metallicity gradient in the Milky Way's disk and examined how this gradient varies for different [α/Fe] subsamples.
K. Schlesinger, Jennifer A. Johnson, C. Rockosi, Y. S. Lee, T. Beers, P. Harding, C. Allende Prieto, J. Bird, R. Schoenrich, B. Yanny, D. Schneider, B. Weaver, J. Brinkmann   +12 more
semanticscholar   +1 more source

The Formation of the Milky Way Disk

, 2000
We present theoretical results on the galactic abundance gradients of several chemical species for the Milky Way disk, obtained using an improved version of the two-infall model of Chiappini, Matteucci, & Gratton (1997) that incorporates a more realistic model of the galactic halo and disk.
Chiappini, Cristina, Matteucci, Francesca, Romano, Donatella   +2 more
openaire   +2 more sources

Bacteria‐Derived Extracellular Vesicle as A “Trojan Horse” for Selective M1 Macrophage‐Targeting in A Multi‐Cellular Entanglement Environment

Advanced Functional Materials, EarlyView.
The temporary transition of macrophages from a pro‐inflammatory phenotype of macrophages (M1) to an anti‐inflammatory phenotype of macrophages (M2) is crucial for tissue repair and regeneration processes. Bacterial outer membrane vesicles (OMVs) are utilized as a “trojan horse” for specific M1 macrophage‐targeting and anti‐inflammatory drug delivery ...
Donglin Cai, Zhelun Li, Wendong Gao, Yuqing Mu, Jiaying Liu, Yufeng Zhang, Xiaohan Mei, Jingjing Quan, Lan Xiao, Yin Xiao   +9 more
wiley   +1 more source

Thin disk kinematics from RAVE and the solar motion [PDF]

, 2012
Aims. We study the Milky Way thin disk with the Radial Velocity Experiment (RAVE) survey. We consider the thin and thick disks as different Galactic components and present a technique to statistically disentangle the two populations.
Bertelli, G., Bienayme, O., Bland-Hawthorn, J., Boeche, C., Chiosi, C., Gibson, B. K., Gilmore, G., Grebel, E. K., Munari, U., Navarro, J. F., Parker, Q., Pasetto, S., Reid, W., Seabroke, G., Silviero, A., Steinmetz, M., Zwitter, T.   +16 more
core   +2 more sources

CHEMICAL CARTOGRAPHY WITH APOGEE: LARGE-SCALE MEAN METALLICITY MAPS OF THE MILKY WAY DISK [PDF]

, 2013
We present Galactic mean metallicity maps derived from the first year of the SDSS-III APOGEE experiment. Mean abundances in different zones of projected Galactocentric radius (0 < R < 15 kpc) at a range of heights above the plane (0 < |z| < 3 kpc), are ...
M. Hayden, J. Holtzman, J. Bovy, S. Majewski, Jennifer A. Johnson, C. Allende Prieto, T. Beers, K. Cunha, P. Frinchaboy, A. G. García Pérez, L. Girardi, F. Hearty, Y. S. Lee, D. Nidever, R. Schiavon, K. Schlesinger, D. Schneider, M. Schultheis, M. Shetrone, V. Smith, G. Zasowski, D. Bizyaev, D. Feuillet, S. Hasselquist, K. Kinemuchi, E. Malanushenko, V. Malanushenko, R. O’Connell, K. Pan, K. Stassun   +29 more
semanticscholar   +1 more source

Generalized Rotation Curves of the Milky Way from the GAIA DR3 Data Set: Constraints on Mass Models

The Astrophysical Journal
The circular velocity curve traced by stars provides a direct means of investigating the potential and mass distribution of the Milky Way. Recent measurements of the Galaxy’s rotation curve have revealed a significant decrease in velocity for Galactic ...
Francesco Sylos Labini
doaj   +1 more source

A NEW STELLAR CHEMO–KINEMATIC RELATION REVEALS THE MERGER HISTORY OF THE MILKY WAY DISK [PDF]

, 2013
The velocity dispersions of stars near the Sun are known to increase with stellar age, but age can be difficult to determine, so a proxy like the abundance of α elements (e.g., Mg) with respect to iron, [α/Fe], is used.
I. Minchev, C. Chiappini, M. Martig, M. Steinmetz, R. D. Jong, C. Boeche, C. Scannapieco, T. Zwitter, R. Wyse, J. Binney, J. Bland-Hawthorn, O. Bienaymé, B. Famaey, K. Freeman, B. Gibson, E. Grebel, G. Gilmore, A. Helmi, G. Kordopatis, Y. Lee, U. Munari, J. Navarro, Q. Parker, A. Quillen, W. Reid, A. Siebert, A. Siviero, G. Seabroke, F. Watson, M. Williams   +29 more
semanticscholar   +1 more source

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