Results 1 to 10 of about 89 (87)
Chemo-Dynamical Evolution of the ISM in Galaxies [PDF]
Astrophysics and Space Science, 2004 Chemo-dynamical models have been introduced in the late eighties and are a generally accepted tool for understanding galaxy evolution. They have been successfully applied to one-dimensional problems, e.g. the evolution of non-rotating galaxies, and two-dimensional problems, e.g. the evolution of disk galaxies.
Harfst, Stefan +2 more
openaire +3 more sources
Interaction of jets with the ISM of radio galaxies [PDF]
Astrophysics and Space Science, 2007 We present three dimensional simulations of the interaction of a light hypersonic jet with an inhomogeneous thermal and turbulently supported disk in an elliptical galaxy, including Radio and multi-band X-ray visualisations. These simulations are applicable to the GPS/CSS phase of some extragalactic radio sources. We identify four generic phases in the
Sutherland, Ralph, Bicknell, Geoffrey
openaire +3 more sources
Modelling Galaxies with a 3D Multi-Phase ISM [PDF]
Publications of the Astronomical Society of Australia, 2004 AbstractWe present a modified TREE-SPH code to model galaxies in three dimensions. The model includes a multi-phase description of the interstellar medium which combines two numerical techniques. A diffuse warm/hot gas phase is modelled by SPH, whereas a cloudy medium is represented by a sticky particle scheme.
Harfst, Stefan +2 more
openaire +6 more sources
The ISM in Nearby Dwarf Galaxies [PDF]
Highlights of Astronomy, 1998 In recent years, color-magnitude diagrams have revealed that nearby dwarf galaxies have a fascinating variety of star formation histories. The fact that the dwarfs have periods of star formation activity and inactivity raises several questions. How do the properties of the interstellar medium (ISM) in a galaxy affect its star formation rate?
L. M. Young, K. Y. Lo
openaire +1 more source
ISM Enrichment and Local Pollution in Dwarf Galaxies [PDF]
EAS Publications Series, 2011 The fate of metals after they are released in starburst episodes is still unclear. What phases of the interstellar medium are involved, in which timescales? Evidence has grown over the past few years that the neutral phase of blue compact dwarf (BCD) galaxies may be metal- deficient as compared to the ionized gas of their HII regions.
Kunth, D., Lebouteiller, Vianney
openaire +3 more sources
MODELING DUST EVOLUTION IN GALAXIES WITH A MULTIPHASE, INHOMOGENEOUS ISM [PDF]
The Astrophysical Journal, 2016 ABSTRACT We develop a model of dust evolution in a multiphase, inhomogeneous interstellar medium (ISM) using hydrodynamical simulations of giant molecular clouds in a Milky Way–like spiral galaxy. We improve the treatment of dust growth by accretion in the ISM to investigate the role of the temperature-dependent sticking coefficient and ...
Svitlana Zhukovska +3 more
openaire +4 more sources
The Phase Structure of the ISM in Galaxies [PDF]
Proceedings of the International Astronomical Union, 2009 AbstractDiffuse gas in the Galaxy is observed to exist as cold (T ~ 100 K) neutral atomic gas (CNM) and warm neutral atomic (T ~ 8000 K) gas (WNM). In addition to these “thermal” phases, gas can also exist as warm (T ~ 8000 K) ionized gas, cold (T ~ 10 K) molecular gas and in warm (T ~ 100 - 500 K) interface regions or Photodissociation Regions (PDRs ...
openaire +1 more source
Evolution of the ISM in luminous infrared galaxies [PDF]
Astronomy and Astrophysics, 2010 Aims. Molecules that trace the high-density regions of the interstellar medium may be used to evaluate the changing physical and chemical environment during the ongoing nuclear activity in (ultra-) luminous infrared galaxies (ULIRGs).Methods. The changing ratios of the HCN (1-0), HNC (1-0), HCO(+) (1-0), CN (1-0) and CN (2-1), and CS (3-2) transitions ...
Baan, W. A., Loenen, A. F., Spaans, M.
openaire +2 more sources
EAS Publications Series, 2012 The interstellar medium (ISM) is a key ingredient in galaxy formation and evolution as it provides the molecular gas reservoir which fuels star formation and supermassive black hole accretion. Yet the ISM is one of the least studied aspects of distant galaxies.
openaire +2 more sources
, 2018 Discussion on Sect.1 " ISM physics and chemistry in our Galaxy and in nearby galaxies" and Sect. 2 "Evolution of galaxies and of their ISM."
Molinari Sergio +2 more
openaire +1 more source