Results 51 to 60 of about 92,502 (190)

Traces of the formation history of the Milky Way [PDF]

Proceedings of the International Astronomical Union, 2013
AbstractChemical and kinematical information is needed in order to understand and trace the formation history of our Galaxy. In the homogeneous large sample of F and G stars in the survey by Nordström et al. (2004), groups of stars with orbital parameters different from field stars were found by Helmi et al. (2006).
Nordström, Birgitta, Stonkute, E., Ženovienė, R., Tautvaišienė, G.   +3 more
openaire   +2 more sources

The Milky Way as a Star Formation Engine [PDF]

, 2014
The cycling of material from the interstellar medium (ISM) into stars and the return of stellar ejecta into the ISM is the engine that drives the "galactic ecology" in normal spirals, a cornerstone in the formation and evolution of galaxies through cosmic time.
Molinari, S., Bally, J., Glover, S., Moore, T., Noriega-Crespo, A., Plume, R., Testi, L., Vázquez-Semadeni, E., Zavagno, A., Bernard, J. -P., Martin, P.   +10 more
openaire   +3 more sources

Bailing Out the Milky Way: Variation in the Properties of Massive Dwarfs Among Galaxy-Sized Systems

, 2012
Recent kinematical constraints on the internal densities of the Milky Way's dwarf satellites have revealed a discrepancy with the subhalo populations of simulated Galaxy-scale halos in the standard CDM model of hierarchical structure formation.
A. Cibinel, A. Di Cintio ., A. Zolotov ., A.A. Klypin, A.R. Zentner, A.R. Zentner, Andrew R Zentner, B. Moore ., C. Giocoli, Chris W Purcell, D.R. Law, E.J. Tollerud, F. Hammer, G. Besla ., G.L. Bryan, J. Diemand, J. Wolf ., J.D. Simon, J.S. Bullock, K.R. Stewart, M. Niederste-Ostholt, M.T. Busha, N. Przybilla, P.S. Behroozi, R.P. van der Marel ., S. Codis ., S. Geen, S.D. White, SDSS collaboration, V. Rashkov, WMAP collaboration, X. Yang   +31 more
core   +1 more source

Globular cluster formation within the Aquarius simulation [PDF]

, 2009
The Aquarius project is a very high-resolution simulation capable of resolving the full mass range of potential globular cluster (GC) formation sites.
Ashman, Ashman, B. F. Griffen, Baumgardt, Baumgardt, Beasley, Bekki, Bekki, Bianchi, Brodie, Chandrasekhar, De Angeli, Eggen, Forbes, Gao, Georgiev, Gnedin, Gnedin, Harris, Holtzman, J. C. Helly, K. A. Pimbblet, Kravstov, Kruijssen, Leitherer, M. J. Drinkwater, Madau, Maraston, Marín-Franch, Mateo, Moore, Nishi, Ostriker, P. A. Thomas, Peebles, Power, Prieto, Ricotti, Salaris, Searle, Sokasian, Springel, Springel, Springel, Toomre, Tumlinson, Weidner, West, Whitmore, Zepf   +49 more
core   +3 more sources

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

Predicting the locations of possible long-lived low-mass first stars: Importance of satellite dwarf galaxies

, 2017
The search for metal-free stars has so far been unsuccessful, proving that if there are surviving stars from the first generation, they are rare, they have been polluted, or we have been looking in the wrong place.
Agarwal, Bhaskar, Frebel, Anna, Glover, Simon C. O., Griffen, Brendan F., Hartwig, Tilman, Klessen, Ralf S., Magg, Mattis   +6 more
core   +3 more sources

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

Very Metal-poor Stars in the Solar Vicinity: Kinematics and Abundance Analysis

The Astrophysical Journal, 2023
Very metal-poor stars contain crucial information on the Milky Way’s infancy. In our previous study we derived a mean age of ∼13.7 Gyr for a sample of these stars in the Sun’s vicinity.
Anastasiia Plotnikova, Giovanni Carraro, Sandro Villanova, Sergio Ortolani   +3 more
doaj   +1 more source

The star-formation history of the Milky Way Galaxy

, 2009
The star-formation histories of the main stellar components of the Milky Way constrain critical aspects of galaxy formation and evolution. I discuss recent determinations of such histories, together with their interpretation in terms of theories of disk ...
Bensby, Bensby, Bensby, Cignoni, Famaey, François, Maiolino, Nordström, Rocha-Pinto, Rosemary F. G. Wyse, Wyse, Wyse   +11 more
core   +1 more source

Star Formation in the Local Milky Way [PDF]

Proceedings of the International Astronomical Union, 2015
AbstractStudies of molecular clouds and young stars near the sun have provided invaluable insights into the process of star formation. Indeed, much of our physical understanding of this topic has been derived from such studies. Perhaps the two most fundamental problems confronting star formation research today are: 1) determining the origin of stellar ...
openaire   +2 more sources