Abstract
view Abstract Citations (3) References Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Variation of galactic rotation parameters with distance scale Howard, William E., III ; Kirk, John G. Abstract The radial velocities of 144 Cepheids and 39 galactic clusters are analyzed by means of a higher-order expansion of the galactic rotation equation, assuming pure circular rotation. Provision is made to determine the galactic rotation parameters simultaneously and to investigate the effects on these parameters of varying the distance scale. The Cepheid and cluster distance scales are found to agree to within 3.5%. Various other galactic models are compared with a final composite model derived here which has the following parameters: R5= 11.4 kpc; '= -2.29 km/sec-kpc2 ws" $0.35 km/sec-kpc2 W = -0.1 km/sec-kpc4 A = 13.1 km/sec-kpc; K= -3.3 km/sec; LO, BO, VO (adopted) =58 4, $21 5,16.4 km/sec, respectively. Publication: The Astronomical Journal Pub Date: August 1965 DOI: 10.1086/109758 Bibcode: 1965AJ.....70..434H full text sources ADS |
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