Results 91 to 100 of about 146,124 (295)

Influence of upstream solar wind on magnetic field distribution in the Martian nightside ionosphere

Earth and Planetary Physics
Using over eight years of Mars Atmosphere and Volatile EvolutioN (MAVEN) data, from November 2014 to May 2023, we have investigated the Martian nightside ionospheric magnetic field distribution under the influence of upstream solar wind drivers ...
JiaWei Gao, ZhaoJin Rong, Qi Zhang, Anna Mittelholz, Chi Zhang, Yong Wei   +5 more
doaj   +1 more source

Modeling the JWST High-redshift Galaxies with a General Formation Scenario and the Consistency with the ΛCDM Model

The Astrophysical Journal Letters, 2023
Early results from the James Webb Space Telescope (JWST) observations have hinted at two traces beyond the standard cosmological framework. One is the extraordinarily high stellar masses and their density at z = 7.5 ∼ 9.1; another is the unexpected ...
Yi-Ying Wang, Lei Lei, Guan-Wen Yuan, Yi-Zhong Fan   +3 more
doaj   +1 more source

Constraining the initial mass function of stars in the Galactic Centre

, 2009
(abridged) Here we discuss the question whether the extreme circumstances in the centre of the Milky Way may be the reason for a significant variation of the IMF.
Alexander, Amaro-Seoane, Bahcall, Bailey, Bartko, Bartko, Baumgardt, Baumgardt, Baumgardt, Baumgardt, Bertelli, Binney, Bonnell, Buchholz, Cohen, Dabringhausen, Dale, Davies, Espinoza, Figer, Figer, Freitag, Fujii, Genzel, Genzel, Gerhard, H. Baumgardt, Hurley, Kalirai, Kim, Klessen, Kroupa, Kroupa, Kroupa, Larson, Levin, Lu, Lu, Löckmann, Löckmann, Löckmann, Löckmann, Maness, Mapelli, Marigo, McMillan, Merritt, Morris, Muno, Nayakshin, Nayakshin, Nayakshin, P. Kroupa, Paumard, Portegies Zwart, Preto, Salpeter, Schödel, Schödel, Sellwood, Sheth, Stolte, Thorsett, U. Löckmann   +63 more
core   +1 more source

Global Insights Into Term Spreads: Unveiling Their Predictive Power During Unconventional Monetary Policy

Journal of Forecasting, EarlyView.
ABSTRACT This study investigates the predictive power of the term spread for forecasting economic activity across both conventional and unconventional monetary policy regimes. Utilizing data from 22 OECD countries spanning the period from 1985Q1 to 2024Q2, the analysis reveals that the term spread generally maintains its ability to predict GDP growth ...
Petri Kuosmanen, Juuso Vataja
wiley   +1 more source

Steeper, Flatter, or Just "Salpeter"? Evidence from Galaxy Evolution and Galaxy Clusters

, 2004
A single-slope "Salpeter" IMF overpredicts the stellar M/L ratio of local elliptical galaxies by about a factor of 2, which requires the IMF to be flatter below about one solar mass.
A. Cimatti, A. Dressler, A. Finoguenov, A. Fontana, A. Gal-Yam, A. Renzini, A. Renzini, A. Renzini, A. Renzini, C. Maraston, E. E. Salpeter, H. Spinrad, J.S. Dunlop, L. Portinari, M. Arnaboldi, P.G. Dokkum van, R. Marel van der, S. Djorgovski, S. Wuyts, S.E. Woosley   +19 more
core   +3 more sources

Using DSGE and Machine Learning to Forecast Public Debt for France

Journal of Forecasting, EarlyView.
ABSTRACT Forecasting public debt is essential for effective policymaking and economic stability, yet traditional approaches face challenges due to data scarcity. While machine learning (ML) has demonstrated success in financial forecasting, its application to macroeconomic forecasting remains underexplored, hindered by short historical time series and ...
Emmanouil Sofianos, Thierry Betti, Theophilos Papadimitriou, Amélie Barbier‐Gauchard, Periklis Gogas   +4 more
wiley   +1 more source

Association of Skeletal Muscle, Body Fat and Frailty With Prolonged Length of Hospital Stay Following Colectomy for Adenocarcinoma: A Pilot Case‐Control Study

Health Care Science, EarlyView.
ABSTRACT Physical fitness is well‐known to be associated with health outcomes. This pilot study examined the impact of different measures of fitness on length of stay following colectomy. A case‐control study was designed to evaluate the effect of skeletal muscle mass, body fat, and frailty measures on post‐operative length of stay (LOS).
Annmarie Butare, Justin Drake, Michael D. Honaker   +2 more
wiley   +1 more source

The minimum stellar metallicity observable in the Galaxy

, 2008
The first stars fundamentally transformed the early Universe through their production of energetic radiation and the first heavy chemical elements. The impact on cosmic evolution sensitively depends on their initial mass function (IMF), which can be ...
Adelman-McCarthy, Anna Frebel, Barkana, Beers, Bondi, Bromm, Bromm, Carollo, Christlieb, Ciardi, Collet, Frebel, Frebel, Frebel, Freeman, Fulbright, Heger, Iben, Iwamoto, Jarrett L. Johnson, Johnson, Johnston, Karlsson, Lacey, Lee, Munn, Norris, Oey, Pagel, Salvadori, Schneider, Talbot, Tumlinson, Umeda, Volker Bromm, Yoshii   +35 more
core   +1 more source

The effects of the IMF on the chemical evolution of elliptical galaxies

, 2017
14 pages, 6 figures, accepted for publication in ...
De Masi, Carlo Maria, Matteucci, Francesca, Vincenzo, Fiorenzo   +2 more
openaire   +2 more sources

Herding and Anti‐Herding Behaviour in the UK, French and German Stock Markets Before and During the Covid Pandemic

International Journal of Finance &Economics, EarlyView.
ABSTRACT This paper studies herding and anti‐herding behaviour in three European stock markets before and during the Covid‐19 pandemic by employing both static and dynamic analysis. We examine four different questions related to herding behaviour: (i) Did herding behaviour increase during the pandemic? (ii) Does herding behaviour respond differently in
Dimitrios Asteriou, Paraskevi Katsiampa, Keith Pilbeam, Alexander Tziamalis   +3 more
wiley   +1 more source