Results 31 to 40 of about 77,216 (325)

Chemo-spectrophotometric evolution of spiral galaxies: I. The model and the Milky Way [PDF]

, 1999
The chemical and spectro-photometric evolution of spiral galaxies is investigated with detailed models, making use of up-to-date ingredients (like metallicity dependent stellar properties) and a prescription for the star formation rate (SFR) justified ...
Allard, Allen, Anders, Arimoto, Baraffe, Bazan, Bessell, Bethe, Bethe, Boesgaard, Bohlin, Boissier, Bruzual, Calzetti, Cappellaro, Cardelli, Carigi, Chamcham, Charbonnel, Charbonnel, Chiapini, Clarke, Contardo, Coppi, Corradi, Cunha, Dame, Dopita, Dwek, Edvardsson, Ferrini, Firmani, Fluks, Freudenreich, Gilmore, Gilmore, Gilmore, Gizis, Gould, Grevesse, Guibert, Guiderdoni, Guiderdoni, Gummersbach, Gusten, Han, Haywood, Iben, Israelian, Jimenez, Kennicutt, Kennicutt, Kent, Kroupa, Kroupa, Kuchinski, Kulkarni, Kurucz, Köppen, Lacey, Larson, Lejeune, Lilly, Lyne, Marigo, Massey, Massey, Matteucci, Matteucci,, Mayor, Mera, Molla, N. Prantzos, Natta, Nomoto, Onihishi, Pagel, Prantzos, Prantzos, Prantzos, Prantzos, Prantzos, Prantzos, Prantzos, Rana, Reid, Renzini, Robin, Rocha-Pinto, Rocha-Pinto, Romani, Ruiz-Lapuente, Ruphy, S. Boissier, Sackett, Salpeter, Samland, Scalo, Scalo, Schaller, Shaver, Smart, Steinmetz, Talbot, Tammann, Thielemann, Thielemann, Thomas, Thorsett, Timmes, Tinsley, Tosi, Tosi, Tsujimoto, van der Kruit, Vilchez, Wang, Wang, Wang, Woosley, Wyse, Wyse, Xu   +122 more
core   +4 more sources

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

Evolution over time of the Milky Way’s disc shape [PDF]

Astronomy & Astrophysics, 2017
Context.Galactic structure studies can be used as a path to constrain the scenario of formation and evolution of our Galaxy. The dependence with the age of stellar population parameters would be linked with the history of star formation and dynamical evolution.Aims.We aim to investigate the structures of the outer Galaxy, such as the scale length, disc
Amôres, E., Robin, A. C., Reylé, C.
openaire   +4 more sources

Modelling the chemical evolution of the Milky Way [PDF]

The Astronomy and Astrophysics Review, 2021
AbstractIn this review, I will discuss the comparison between model results and observational data for the Milky Way, the predictive power of such models as well as their limits. Such a comparison, known as Galactic archaeology, allows us to impose constraints on stellar nucleosynthesis and timescales of formation of the various Galactic components ...
openaire   +2 more sources

Stellar Bars in Isolated Gas-rich Spiral Galaxies Do Not Slow Down

The Astrophysical Journal, 2023
Elongated bar-like features are ubiquitous in galaxies, occurring at the centers of approximately two-thirds of spiral disks in the nearby Universe. Due to gravitational interactions between the bar and the other components of galaxies, it is expected ...
Angus Beane, Lars Hernquist, Elena D’Onghia, Federico Marinacci, Charlie Conroy, Jia Qi, Laura V. Sales, Paul Torrey, Mark Vogelsberger   +8 more
doaj   +1 more source

Disentangling Stellar Age Estimates from Galactic Chemodynamical Evolution

The Astrophysical Journal, 2023
Stellar ages are key for determining the formation history of the Milky Way, but are difficult to measure precisely. Furthermore, methods that use chemical abundances to infer ages may entangle the intrinsic evolution of stars with the chemodynamical ...
Jeff Shen, Joshua S. Speagle, J. Ted Mackereth, Yuan-Sen Ting, Jo Bovy   +4 more
doaj   +1 more source

The Galactic Bulge: A Review

, 2007
The Milky Way is the only galaxy for which we can resolve individual stars at all evolutionary phases, from the Galactic center to the outskirt. The last decade, thanks to the advent of near IR detectors and 8 meter class telescopes, has seen a great ...
Alard, Alves-Brito, Barbuy, Barbuy, Barbuy, Bica, Dante Minniti, Dwek, Hamadache, Harding, Immeli, Lecureur, Manuela Zoccali, Zoccali, Zoccali, Zoccali   +15 more
core   +1 more source

Why is the Milky Way X-factor Constant? [PDF]

, 2013
The CO-H2 conversion factor (Xco; otherwise known as the X-factor) is observed to be remarkably constant in the Milky Way and in the Local Group (aside from the SMC). To date, our understanding of why Xco should be so constant remains poor.
Hopkins, Philip, Narayanan, Desika
core   +2 more sources

4MOST Consortium Survey 3: Milky Way Disc and Bulge Low-Resolution Survey (4MIDABLE-LR)

, 2019
The mechanisms of the formation and evolution of the Milky Way are encoded in the orbits, chemistry and ages of its stars. With the 4MOST MIlky way Disk And BuLgE Low-Resolution Survey (4MIDABLE-LR) we aim to study kinematic and chemical substructures in
Anders, F., Andrae, R., Arentsen, A., Asplund, M., Bensby, T., Bergemann, M., Casagrande, L., Cescutti, G., Chiappini, C., Church, R., Feltzing, S., Fouesneau, M., Fusillo, N., Gerhard, O., Grebel, E., Guiglion, G., Khalatyan, A., Kordopatis, G., Kovalev, M., Lemasle, B., Matijevic, G., McMillan, P., Minchev, I., Monari, G., Queiroz, A., Rix, H., Rybizki, J., Ryde, N., Schwope, A., Starkenburg, E., Steinmetz, M., Storm, J., Team, 4., Traven, G., Tremblay, P., Valentini, M., Walton, N., Xiang, M., Zucker, D.   +38 more
core   +1 more source

A confirmed location in the Galactic halo for the high-velocity cloud 'chain A' [PDF]

, 1999
The high-velocity clouds of atomic hydrogen, discovered about 35 years ago, have velocities inconsistent with simple Galactic rotation models that generally fit the stars and gas in the Milky Way disk.
Kalberla, Peter M. W., Peletier, Reynier F., Schwarz, Ulrich J., van Woerden, Hugo, Wakker, Bart P.   +4 more
core   +4 more sources