Abstract
ABSTRACT We observe the density wave's angular pattern speed Ωp to be near 12–17 km s−1 kpc−1, by the separation between a typical optical H ii region (from the spiral arm's dust lane) and using a H ii-evolution time model TH ii to yield its relative speed, and independently by the separation between a typical radio maser (from the spiral arm's dust lane) with a maser model. The assumption of a fixed circular rotational speed of the gas and stars with galactic radius is employed (neglecting spiral perturbation at mid-radii, nuclear bar influence at small radii, and tidal effects at large radii).
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
