Computer Science – Numerical Analysis
Scientific paper
Dec 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994apj...437l.123w&link_type=abstract
Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 437, no. 2, p. L123-L125
Computer Science
Numerical Analysis
26
Astronomical Maps, Barred Galaxies, Computerized Simulation, Galactic Bulge, Gas Dynamics, Milky Way Galaxy, Infrared Sources (Astronomy), Interstellar Matter, Kinematics, Numerical Analysis
Scientific paper
Analyses of the distribution of far-infrared point sources in the Galactic bulge have suggested that from a face-on perspective the bulge has a barlike shape. Here, we investigated how a rotating barlike bulge affects the global gasdynamics in a disk and compare the longitude-velocity (LV) maps from self-gravitating hydrodynamical simulations with observed maps of neutral hydrogen and carbon monoxide in the Galaxy. We found that the features on the numerical LV maps depend strongly on four factors: the pattern speed of the bar, the position angle of the Sun, the strength of the bar potential, and the ratio of the gas mass to total dynamical mass. We conclude that our Galaxy has a rotating, weak, barlike bulge observed from nearly end-on. The allowed range of pattern speed of the bar is surprisingly narrow and is consistent with recent observations of bulge stars. Self-gravity of the interstellar matter is needed to account for some of the observations.
Habe Asao
Hasegawa Tetsuo
Taniguchi Yoshiaki
Wada Keiichi
No associations
LandOfFree
Gasdynamical approach to a face-on view of the Milky Way does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Gasdynamical approach to a face-on view of the Milky Way, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Gasdynamical approach to a face-on view of the Milky Way will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1327055