Results 1 to 10 of about 146,569 (285)

The Effects of a Variable IMF on the Chemical Evolution of the Galaxy [PDF]

Astrophysics and Space Science Library, 2000
In this work we explore the effects of adopting an initial mass function (IMF) variable in time on the chemical evolution of the Galaxy. In order to do that we adopt a chemical evolution model which assumes two main infall episodes for the formation of ...
A Martinelli, B Burton, BEJ Pagel, C Chiappini, C Chiappini, C Chiosi, C Pardi, F Matteucci, F Matteucci, HJ Rocha- Pinto, JM Scalo, K Fuhrmann, L Portinari, N Prantzos, N Roche, OJ Eggen, P Padoan, RB Larson, RX Chang, S Scully, T Beers, W Maciel   +21 more
exaly   +5 more sources

The «Group of Twenty», IMF and EU and Reforming of Global Governance

Vestnik MGIMO-Universiteta, 2014
This article is devoted to the process of reforming the global financial system and world economic organizations since the foundation of the International Monetary Fund at the Bretton Woods Conference in 1944 to present time.
Evgeniy J. Il'in
doaj   +5 more sources

Stellar Initial Mass Function (IMF) Probed with Supernova Rates and Neutrino Background: Cosmic-average IMF Slope Is ≃2–3 Similar to the Salpeter IMF

The Astrophysical Journal, 2023
The stellar initial mass function (IMF) is expressed by ϕ ( m ) ∝ m ^− ^α with the slope α , and known as a poorly constrained but very important function in studies of star and galaxy formation. There are no sensible observational constraints on the IMF
Shohei Aoyama, Masami Ouchi, Yuichi Harikane   +2 more
doaj   +1 more source

Upstream proton cyclotron waves: occurrence and amplitude dependence on IMF cone angle at Mars — from MAVEN observations

Earth and Planetary Physics, 2020
Proton cyclotron waves (PCWs) can be generated by ion pickup of Martian exospheric particles in the solar wind. The solar wind ion pickup process is highly dependent on the “IMF cone angle” — the angle between the solar wind velocity and the ...
Di Liu, ZhongHua Yao, Yong Wei, ZhaoJin Rong, LiCan Shan, Stiepen Arnaud, Espley Jared, HanYing Wei, WeiXing Wan   +8 more
doaj   +1 more source

Interplanetary Magnetic Field Effect on the Location of the Martian Bow Shock: MAVEN Observations

The Astrophysical Journal, 2023
The Martian bow shock (BS) is generated with the mass-loading and magnetic pileup processes when the solar wind interacts with the Martian ionosphere. In this vein, the interplanetary magnetic field (IMF) frozen in the solar wind can affect the location ...
H. Y. Sui, M. Wang, J. Y. Lu, Y. Zhou, J. Wang   +4 more
doaj   +1 more source

Transition of the Stellar Initial Mass Function Explored with Binary Population Synthesis [PDF]

, 2013
The stellar initial mass function (IMF) plays a crucial role in determining the number of surviving stars in galaxies, the chemical composition of the interstellar medium, and the distribution of light in galaxies.
Aoki, Wako, Campbell, Simon W., Doherty, Carolyn L., Fujimoto, Masayuki Y., Gil-Pons, Pilar, Katsuta, Yutaka, Komiya, Yutaka, Suda, Takuma, Wood, Peter R., Yamada, Shimako   +9 more
core   +3 more sources

Diffusive Plasma Transport by the Magnetopause Kelvin-Helmholtz Instability During Southward IMF

Frontiers in Astronomy and Space Sciences, 2022
At the Earth’s low-latitude magnetopause, the Kelvin-Helmholtz (KH) waves, which are driven by the super-Alfvénic velocity shear across the magnetopause, have been frequently observed during periods of northward interplanetary-magnetic-field (IMF) and ...
T. K. M. Nakamura, T. K. M. Nakamura, K. A. Blasl, K. A. Blasl, Y. -H. Liu, S. A. Peery   +5 more
doaj   +1 more source

Luminosity Evolution of Early-type Galaxies to z=0.83: Constraints on Formation Epoch and Omega [PDF]

, 1998
We present deep spectroscopy with the Keck telescope of eight galaxies in the luminous X-ray cluster MS1054-03 at z=0.83. The data are combined with imaging observations from the Hubble Space Telescope (HST).
Aragon-Salamanca A., Daniel D. Kelson, Garth D. Illingworth, Gibson B. K., Hogbom J. A., Jorgensen I., Kauffmann G., Marijn Franx, Pieter G. van Dokkum, van Dokkum P. G.   +9 more
core   +2 more sources

Statistical Birkeland current distributions from magnetic field observations by the Iridium constellation [PDF]

Annales Geophysicae, 2008
We present a statistical analysis of Birkeland currents derived from Iridium magnetometer data acquired in the Northern Hemisphere to determine the dependence of large-scale currents on the interplanetary magnetic field (IMF) direction.
B. J. Anderson, H. Korth, C. L. Waters, D. L. Green, P. Stauning   +4 more
doaj   +1 more source

Reverse dynamical evolution of Eta Chamaeleontis [PDF]

, 2013
In the scope of the star formation process, it is unclear how the environment shapes the initial mass function (IMF). While observations of open clusters propose a universal picture for the IMF from the substellar domain up to a few solar masses, the ...
Aarseth, Abt, Adams, Barrado y Navascués, Bastian, Basu, Bochanski, Brandeker, Brandeker, C. Becker, Chabrier, de Wit, Duchêne, Duquennoy, E. Moraux, G. Duchêne, Hennebelle, Jeffries, Jilinski, King, Kirk, Kraus, Kraus, Kraus, Kroupa, Kroupa, Kroupa, Kroupa, Kroupa, Kroupa, Kustaanheimo, Köhler, Lodieu, Luhman, Luhman, Luhman, Lyo, Lyo, Lyo, Mamajek, Marks, Marks, Maschberger, Massey, Mikkola, Miller, Moraux, Moraux, Moraux, Murphy, Ortega, Parker, Parravano, Raghavan, Reggiani, Reipurth, Reipurth, Salpeter, Scally, Song, Stamatellos, T. Maschberger, Thies, Thies, Thies, Tutukov, W. Lawson, Whitworth   +67 more
core   +2 more sources