Results 51 to 60 of about 42,847 (320)

The Turbulent Interstellar Medium [PDF]

, 2006
An overview is presented of the main properties of the interstellar medium. Evidence is summarized that the interstellar medium is highly turbulent, driven on different length scales by various energetic processes.
Andreas Burkert, Balbus, Ballesteros-Paredes, Bergin, Blitz, Blondin, Bonnell, Burkert, Burkert, Burkert, Cappellaro, Cowie, de Avillez, de Avillez, Dib, Dib, Dickey, Dickey, Dziourkevitch, Elmegreen, Elmegreen, Elmegreen, Elmegreen, Elmegreen, Elmegreen, Falgarone, Field, Field, Forster Schreiber, Gazol, Hartmann, Hartmann, Hartmann, Hartmann, Heiles, Heitsch, Heitsch, Hennebelle, Hennebelle, Jenkins, Kanekar, Kerp, Kessel-Deynet, Kim, Kim, Kim, Klein, Klessen, Kolmogorov, Koyama, Kritsuk, Kritsuk, Larson, Mac Low, Mac Low, Mac Low, McKee, Palla, Piontek, Puche, Rhode, Scalo, Scalo, Sellwood, Slyz, Stone, Tran, Vishniac, von Weizsäcker, Vázquez-Semadeni, Wada, Walder, Walder, Williams   +73 more
core   +3 more sources

Comparing the Locations of Supernovae to CO (2–1) Emission in Their Host Galaxies

The Astrophysical Journal, 2023
We measure the molecular gas environment near recent (
Ness Mayker Chen, Adam K. Leroy, Laura A. Lopez, Samantha Benincasa, Mélanie Chevance, Simon C. O. Glover, Annie Hughes, Kathryn Kreckel, Sumit Sarbadhicary, Jiayi Sun, Todd A. Thompson, Dyas Utomo, Frank Bigiel, Guillermo A. Blanc, Daniel A. Dale, Kathryn Grasha, J. M. Diederik Kruijssen, Hsi-An Pan, Miguel Querejeta, Eva Schinnerer, Elizabeth J. Watkins, Thomas G. Williams   +21 more
doaj   +1 more source

The chemistry of fluorine-bearing molecules in diffuse and dense interstellar gas clouds

, 2005
We present a theoretical investigation of the chemistry of fluorine-bearing molecules in diffuse and dense interstellar gas clouds. The chemistry of interstellar fluorine is qualitatively different from that of any other element, because - unlike the ...
Neufeld, David A., Schilke, Peter, Wolfire, Mark G.   +2 more
core   +1 more source

Are Supernovae Responsible for the Gamma Ray Spectrum from the Galactic Center?

Acta Polytechnica CTU Proceedings, 2014
We discuss the supernova remnants distribution as a function of the galactic longitude and compare their positions to that of the detected TeV gamma ray sources. A large fraction of these sources either coincide or a close by known supernova remnants. If
Todor Stanev
doaj   +1 more source

Ambipolar Diffusion Effects on Weakly Ionized Turbulence Molecular Clouds [PDF]

Proceedings of the International Astronomical Union, 2010
AbstractAmbipolar diffusion (AD) is a key process in molecular clouds (MCs). Non-ideal MHD turbulence simulations are technically very challenging because of the large Alfvén speed of ions in weakly ionized clouds. Using the Heavy-Ion Approximation method (Li, McKee & Klein 2006), we have carried out two-fluid simulations of AD in isothermal ...
Pak Shing Li, Christopher F. McKee, Richard I. Klein   +2 more
openaire   +1 more source

Cloud angular momentum and effective viscosity in global SPH simulations with feedback [PDF]

, 2014
We examine simulations of isolated galaxies to analyse the effects of localized feedback on the formation and evolution of molecular clouds. Feedback contributes to turbulence and the destruction of clouds, leading to a population of clouds that is ...
Agertz, Bell, Benincasa, Blitz, Brad K. Gibson, Ceverino, Chernin, Christensen, Couchman, David J. Williamson, Davis, Dobbs, Dobbs, Dobbs, Dobbs, Dobbs, Dobbs, Dobbs, Fujimoto, Goldreich, Hopkins, Imara, Imara, James Wurster, Kennicutt, Krumholz, Kuijken, Mestel, Monaghan, Navarro, Phillips, Rahimi, Robert J. Thacker, Robertson, Roman-Duval, Rosolowsky, Sanders, Solomon, Solomon, Springel, Stinson, Tasker, Tasker, Thacker, Thacker, Widrow, Widrow, Williams, Williamson, Wurster   +49 more
core   +4 more sources

Characterizing the 3D Structure of Molecular Cloud Envelopes in the Cloud Factory Simulations

The Astrophysical Journal
We leverage recent numerical simulations of highly resolved star-forming regions in a Milky Way–like galaxy to explore the nature of extended gaseous envelopes around molecular clouds.
Elijah Mullens, Catherine Zucker, Claire E. Murray, Rowan Smith   +3 more
doaj   +1 more source

Tumour–host interactions in Drosophila: mechanisms in the tumour micro‐ and macroenvironment

Molecular Oncology, EarlyView.
This review examines how tumour–host crosstalk takes place at multiple levels of biological organisation, from local cell competition and immune crosstalk to organism‐wide metabolic and physiological collapse. Here, we integrate findings from Drosophila melanogaster studies that reveal conserved mechanisms through which tumours hijack host systems to ...
José Teles‐Reis, Tor Erik Rusten
wiley   +1 more source

Reevaluation of the Cosmic-Ray Ionization Rate in Diffuse Clouds

The Astrophysical Journal
All current estimates of the cosmic-ray (CR) ionization rate rely on assessments of the gas density along the probed sight lines. Until now, these have been based on observations of different tracers, with C _2 being the most widely used in diffuse ...
M. Obolentseva, A. V. Ivlev, K. Silsbee, D. A. Neufeld, P. Caselli, G. Edenhofer, N. Indriolo, T. G. Bisbas, D. Lomeli   +8 more
doaj   +1 more source

Nonthermal Chemistry in Diffuse Clouds with Low Molecular Abundances

The Astrophysical Journal, 2003
High quality archival spectra of interstellar absorption from C I toward 9 stars, taken with the Goddard High Resolution Spectrograph on the Hubble Space Telescope, were analyzed. Our sample was supplemented by two sight lines, 23 Ori and B1 Sco, for which the C I measurements of Federman, Welty, & Cardelli were used.
Zsargo, J., Federman, S. R.
openaire   +2 more sources