Results 31 to 40 of about 322,282 (370)
Dense Molecular Environments of B[e] Supergiants and Yellow Hypergiants
Galaxies, 2023 Massive stars expel large amounts of mass during their late evolutionary phases. We aim to unveil the physical conditions within the warm molecular environments of B[e] supergiants (B[e]SGs) and yellow hypergiants (YHGs), which are known to be embedded ...
Michaela Kraus +4 more
doaj +1 more source
International Astronomical Union Colloquium, 1989 AbstractThis paper reviews recent developments in the study of bipolar outflows and their possible collimation by disklike structures. The exciting stars of most bipolar outflows are embedded in dense cores, self-gravitating structures with masses in the range of 1 to 103M⊙.
openaire +1 more source
A Review of Recent Observations of Galactic Winds Driven by Star Formation
Galaxies, 2018 Galaxy-scale outflows of gas, or galactic winds (GWs), driven by energy from star formation are a pivotal mechanism for regulation of star formation in the current model of galaxy evolution.
David S. N. Rupke
doaj +1 more source
FDI FLOWS IN EU COUNTRIES – TRACKING THE PANDEMIC CRISIS [PDF]
Annals of the University of Craiova: Economic Sciences Series, 2021 The global economy is trying to recover after the severe crisis caused by the COVID-19 pandemic and the immediate impact on foreign direct investments (FDI) is still serious.
Laura Vasilescu, Raducu Stefan Bratu
doaj
Anisotropic Galactic Outflows and Enrichment of the Intergalactic Medium. I: Monte Carlo Simulations [PDF]
, 2006 We have developed an analytical model to describe the evolution of anisotropic galactic outflows. With it, we investigate the impact of varying opening angle on galaxy formation and the evolution of the IGM.
Cedric Grenon +6 more
core +2 more sources
Unveiling the Evolutionary State of Three B Supergiant Stars: PU Gem, ϵ CMa, and η CMa
Galaxies, 2023 We aim to combine asteroseismology, spectroscopy, and evolutionary models to establish a comprehensive picture of the evolution of Galactic blue supergiant stars (BSG). To start such an investigation, we selected three BSG candidates for our analysis: HD
Julieta Paz Sánchez Arias +5 more
doaj +1 more source
Powerful Outflows and Feedback from Active Galactic Nuclei [PDF]
, 2015 Active Galactic Nuclei (AGN) represent the growth phases of the supermassive black holes in the center of almost every galaxy. Powerful, highly ionized winds, with velocities $\sim 0.1- 0.2c$ are a common feature in X--ray spectra of luminous AGN ...
A. King, K. Pounds
semanticscholar +1 more source
Cooler and smoother – the impact of cosmic rays on the phase structure of galactic outflows [PDF]
Monthly notices of the Royal Astronomical Society, 2018 We investigate the impact of cosmic rays (CRs) on galactic outflows from a multi-phase interstellar medium with solar neighbourhood conditions. The three-dimensional magneto-hydrodynamical simulations include CRs as a relativistic fluid in the advection ...
P. Girichidis +3 more
semanticscholar +1 more source
International Astronomical Union Colloquium, 1989 The development of millimeter and submillimeter spectroscopy has allowed astronomers to probe the cold, dense component of the interstellar medium. This medium, primarily composed of gas in molecular form, is gravitationally bound into relatively distinct clouds that are sites of star formation within our Galaxy.
openaire +1 more source
NIHAO - XI. Formation of ultra-diffuse galaxies by outflows [PDF]
, 2016 We address the origin of Ultra-Diffuse Galaxies (UDGs), which have stellar masses typical of dwarf galaxies but effective radii of Milky Way-sized objects. Their formation mechanism, and whether they are failed $\rm L_{\star}$ galaxies or diffuse dwarfs,
A. Cintio +5 more
semanticscholar +1 more source