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- W2022804018 abstract "view Abstract Citations (35) References (13) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Kinematics of the Mira Variables. Smak, Jozef I. ; Preston, George W. Abstract Radial velocities based on Lick 120-inch coude spectrograms are given for 270 Mira variables previously unobserved for radial velocity. The great majority of these Miras have magnitudes in the interval 10 < mpe < 15. These observations are combined with those of Merrill and Feast to discuss the kinematic properties of the Miras. Distances are calculated by means of the absolute magnitudes of Osvalds and Risley and an exponential layer model of the interstellar extinction. Three values of the interstellar extinction coefficient were assumed:1 5, 2 0, and 2.5 pg. mag kpc-1 Values of the Oort constant A 15 km kpc-2 are obtained for period groups with F <350 days. A much larger value A 25 km kpc-2 is obtained for Miras with F > 350 days. The mean 0-component of the galactocentric motion for Miras decreases with increasing height above the galactic plane. This decrease is interpreted in terms of the ellipsoidal hypothesis and leads to z-dependent expressions for V0, A, and R , the galactocentric distance for which V0 is a maximum. Publication: The Astrophysical Journal Pub Date: October 1965 DOI: 10.1086/148364 Bibcode: 1965ApJ...142..943S full text sources ADS | data products SIMBAD (282)" @default.
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- W2022804018 date "1965-10-01" @default.
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- W2022804018 title "Kinematics of the Mira Variables." @default.
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