TY - JOUR
T1 - Asymptotic behavior of the supersonic interstellar gas flow in galactic spiral density waves
AU - Liverts, Edward
N1 - Funding Information:
The author thanks Arthur D. Chernin and Yuriy N. Efremov from the Sternberg Astronomical Institute, Moscow State University for suggesting this problem and for their interest in this work, and Yuriy N. Mishurov from the Rostov State University, Rostov-on-Don in Russia for useful references. The author has benefited from helpful discussions with David Eichler, Michael Gedalin, and Evgeny Griv from the Ben-Gurion University of the Negev in Israel. Also, the author is grateful to an anonymous referee of the paper for his/her useful comments on the original manuscript. The work was supported by the Education Ministry of Russia and the Israeli Ministry of Immigrant Absorption.
PY - 2000/1/1
Y1 - 2000/1/1
N2 - The supersonic nonlinear gas behavior is studied to describe the gas flow in the galactic spiral density wave. The explicit form of the expression describing a critical amplitude of density wave potential, which separates the supersonic flow from the flow containing a jump between supersonic and subsonic flows is obtained. The latter allows us to define the dependence of perturbed galactic potential, under which the shock can be developed, on the macroscopic equilibrium parameters of the system under study, e.g. a sound speed, an angular velocity of galactic rotation, an angular velocity of 'spiral design', etc.
AB - The supersonic nonlinear gas behavior is studied to describe the gas flow in the galactic spiral density wave. The explicit form of the expression describing a critical amplitude of density wave potential, which separates the supersonic flow from the flow containing a jump between supersonic and subsonic flows is obtained. The latter allows us to define the dependence of perturbed galactic potential, under which the shock can be developed, on the macroscopic equilibrium parameters of the system under study, e.g. a sound speed, an angular velocity of galactic rotation, an angular velocity of 'spiral design', etc.
UR - http://www.scopus.com/inward/record.url?scp=0034408550&partnerID=8YFLogxK
U2 - 10.1023/A:1026548801723
DO - 10.1023/A:1026548801723
M3 - Article
AN - SCOPUS:0034408550
SN - 0004-640X
VL - 274
SP - 513
EP - 522
JO - Astrophysics and Space Science
JF - Astrophysics and Space Science
IS - 3
ER -