Role of clusters of galaxies in the evolution of the metal budget in the Universe
, 2003 Using the guidelines on SN element production provided by XMM-Newton, we summarize the results of ASCA observations on the element abundance in groups and clusters of galaxies.
A. Burkert +14 more
core +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. +9 more
core +2 more sources
Poleward moving auroral forms (PMAFs) revisited: responses of aurorae, plasma convection and Birkeland currents in the pre- and postnoon sectors under positive and negative IMF By conditions [PDF]
Annales Geophysicae, 2007 Using five case studies, we investigate the dynamical evolution of dayside auroral precipitation in relation to plasma convection, classifying it by the IMF By component and position with respect to noon. Auroral observations were made by meridian
P. E. Sandholt, C. J. Farrugia
doaj +1 more source
The Chemical Evolution of the Galaxy with Variable IMFs
, 1999 In this work we explore the effects of adopting initial mass functions (IMFs) 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 the Galaxy and which proved to be successful in reproducing the majority of the observational ...
Chiappini, Cristina +2 more
openaire +2 more sources
Population III.1 stars: formation, feedback and evolution of the IMF [PDF]
Proceedings of the International Astronomical Union, 2008 AbstractI discuss current theoretical expectations of how primordial, Pop III.1 stars form. Lack of direct observational constraints makes this a challenging task. In particular predicting the mass of these stars requires solving a series of problems, which all affect, perhaps drastically, the final outcome.
openaire +2 more sources
Frontiers in Astronomy and Space Sciences, 2022 The By component of the magnetic field inside the magnetosphere is positively correlated with the By component of the Interplanetary Magnetic Field (IMF). This leads to asymmetries in aurora, plasma convection and electric currents between the northern and southern hemispheres It has been demonstrated that magnetic conjugate locations in the northern ...
Ohma, Anders +3 more
openaire +4 more sources
Frontiers in Astronomy and Space SciencesMultiple Transpolar arcs (MTPAs) are distinct auroral phenomenon occurring in the high-latitude ionosphere under prolonged northward interplanetary magnetic field (IMF) conditions. While the evolution of MTPAs is thought to be mainly modulated by the IMF
Yan-Ju Sun +16 more
doaj +1 more source
Consistent Dynamical and Stellar Masses with Potential Light IMF in Massive Quiescent Galaxies at 3 < z < 4 Using Velocity Dispersions Measurements with MOSFIRE [PDF]
, 2020 We present the velocity dispersion measurements of four massive ∼1011M⊙ quiescent galaxies at 3.2 < z < 3.7 based on deep H and K-band spectra using the Keck/MOSFIRE near-infrared spectrograph.
J. Esdaile +11 more
semanticscholar +1 more source
Characteristics of merging at the magnetopause inferred from dayside 557.7-nm all-sky images: IMF drivers of poleward moving auroral forms [PDF]
Annales Geophysicae, 2006 We combine in situ measurements from Cluster with high-resolution 557.7 nm all-sky images from South Pole to investigate the spatial and temporal evolution of merging on the dayside magnetopause. Variations of 557.7 nm emissions were observed at a 6 s
N. C. Maynard +15 more
doaj +1 more source
Growth at Risk: Concept and Application in IMF Country Surveillance
IMF Working Papers, 2019 The growth-at-risk (GaR) framework links current macrofinancial conditions to the distribution of future growth. Its main strength is its ability to assess the entire distribution of future GDP growth (in contrast to point forecasts), quantify ...
Ananthakrishnan Prasad +6 more
semanticscholar +1 more source