Results 51 to 60 of about 1,109,137 (355)

Origins of the thick disk of the galaxy as traced by metal-poor stars selected from RAVE

EPJ Web of Conferences, 2012
Models of the formation of the thick disk of the Milky Way Galaxy make specific predictions about the chemical abundance properties of the metal-weak (and oldest) stellar population in the thick disk.
Ruchti G.R.
doaj   +1 more source

Nonextensive Behavior of Stellar Rotation in the Galactic Disk Components

The Astrophysical Journal, 2023
The solar neighborhood is a unique stellar astrophysical laboratory formed by a variety of stars from different origins. In particular, two of the most notable populations known are the thick and thin disk stars, each characterized by distinct chemical ...
M. P. da Silva, M. M. F. de Lima, E. N. Velloso, J.-D. do Nascimento Jr.   +3 more
doaj   +1 more source

Oxygen Abundances in Nearby Stars. Clues to the formation and evolution of the Galactic disk [PDF]

, 2006
The abundances of iron and oxygen are homogeneously determined in a sample of 523 nearby ...
Abadi, Allende Prieto, Allende Prieto, Allende Prieto, Allende Prieto, Allende Prieto, Allende Prieto, Allende Prieto, Allende Prieto, Anstee, Aparicio, Asplund, Asplund, Asplund, Bagnulo, Barbier-Brossat, Barklem, Barklem, Beers, Bensby, Bensby, Bensby, Bertelli, Biémont, Blackwell, Brook, Brook, Butler, C. Allende Prieto, Cabrera-Lavers, Casagrande, Castelli, Chen, Chiappini, Chiba, Clayton, Cowley, D. L. Lambert, Dalcanton, Dehnen, Demircan, Drawin, Duflot, Eriksson, Feltzing, Feltzing, Freeman, Fry, Fuhrmann, Gehren, Gilmore, Gilmore, Gratton, Gratton, Gray, Greggio, Heiter, Hibbert, Holweger, Hubeny, Hubeny, I. Ramírez, Iben, Johnson, Jørgensen, Kim, Kiselman, Kiselman, Kobayashi, Korn, Krauss, Lallement, Lambert, Larsen, Latham, Leroy, Maeder, Majewski, Masana, McWilliam, Meléndez, Meléndez, Mermilliod, Mishenina, Morel, Nissen, Nomoto, Nordström, Ojha, Pont, Prochaska, Quinn, Ramírez, Ramírez, Ramírez, Ramírez, Rana, Reddy, Reddy, Reid, Reylé, Robin, Salaris, Salpeter, Santos, Santos, Schild, Schuler, Schwarzkopf, Shchukina, Shchukina, Siegel, Soubiran, Soubiran, Soubiran, Steenbock, Takeda, Thévenin, Tinsley, Tull, Valenti, Wheeler, Wyse, Yoachim, Yoachim, Yong   +125 more
core   +2 more sources

AN OPTICALLY THICK DISK WIND IN GRO J1655–40? [PDF]

, 2016
We revisited the unusual wind in GRO J1655−40, detected with Chandra in 2005 April, using long-term Rossi X-ray Timing Explorer X-ray data and simultaneous optical/near-infrared photometric data. This wind is the most convincing case for magnetic driving
M. Shidatsu, C. Done, Y. Ueda
semanticscholar   +1 more source

The Asymmetric Drift of the Thick Disk Population [PDF]

Symposium - International Astronomical Union, 1995
We investigate the kinematics of the thick disk population using photometric and astrometric sample surveys towards two opposite directions at intermediate latitude. A multivariate discriminant analysis (MDA) is used to distinguish the ‘Thick Disk’ from other populations with the help of the Besançon model of population synthesis.
Olivier Bienaymé, Annie C. Robin, Devendra K. Ojha   +2 more
openaire   +4 more sources

3D NUMERICAL HYDRODYNAMICAL MODELS OF THE PRECESSING THICK ACCRETION DISK AND ON- AND OFF-STATE GENERATIONS IN MICROQUASARS

Odessa Astronomical Publications, 2017
The thick accretion disk and donor’s wind on the example of CYG X-1 are computed. The main aim of the present simulations is to calculate the precessing thick accretion disk and ON- and OFF-state generation by the methods of 3D numerical hydrodynamics ...
V. V. Nazarenko, S. V. Nazarenko
doaj   +1 more source

Radial Structure in the TW Hya Circumstellar Disk [PDF]

, 2011
We present new near-infrared interferometric data from the CHARA array and the Keck Interferometer on the circumstellar disk of the young star, TW Hya, a proposed "transition disk." We use these data, as well as previously published, spatially resolved ...
Akeson, R. L., Boden, A. F., Ciardi, D. R., McAlister, H., Millan-Gabet, R., Monnier, J. D., Sargent, A. I., Sturmann, J., Sturmann, L., ten Brummelaar, T., Turner, N.   +10 more
core   +2 more sources

Exact general relativistic thick disks [PDF]

Physical Review D, 2004
11 pages, RevTex, 9 eps figs.
Patricio S. Letelier, Guillermo A. González   +1 more
openaire   +3 more sources

Gauging the Galactic thick disk with RR Lyrae stars

EPJ Web of Conferences, 2012
In this contribution we present results from the QUEST RR Lyrae Survey of the thick disk. The survey spans ~480 sq. deg. at low latitude |b| < 30°, with multi-epoch VRI observations, obtained with the QUEST-I camera at the 1m Jürgen Stock Schmidt ...
Cruz G., Briceño C., Downes J.J., Vivas K., Mateu C.   +4 more
doaj   +1 more source

The Chemical Evolution of the Galaxy: the two-infall model [PDF]

, 1996
In this paper we present a new chemical evolution model for the Galaxy which assumes two main infall episodes for the formation of halo-thick disk and thin disk, respectively. We do not try to take into account explicitly the evolution of the halo but we
C., Chiappini, F., Gratton, Matteucci, R.   +5 more
core   +2 more sources