Rotation Curve of the Milky Way from Classical Cepheids
نویسندگان
چکیده
منابع مشابه
Milky Way Rotation from Cepheids
The 87 new 0 determinations were added to the existing sample of cepheids with known radial velocities, forming an extended sample of 278 galactic classical cepheids with reliable radial velocity and photometry. We then calculated distances for these objects through a Period-Luminosity-Colour relation due to Feast & Walker (1987). The position of the cepheids in the galactic disk as given by th...
متن کاملRotation of the outer disc from classical cepheids
Radial velocities and distances have been measured for a sample of 48 remote classical cepheids located in the outer disc of the Galaxy (1180 < l < 2740). The distances are determined from BVI photometry, with semi-empirical metallicity corrections calibrated on the Magellanic Clouds. Using these cepheids as tracers, the rotation curve of the disc is determined between R0 and 2R0. The result is...
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We measure the Galactic rotation curve and its first two vertical derivatives in the first and fourth quadrants of the Milky Way using the 21 cm VGPS and SGPS. We find tangent velocities of the atomic gas as a function of galactic longitude and latitude by fitting an analytic line profile to the edges of the velocity profiles. The shape of the analytic profile depends only on the tangent veloci...
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2019
ISSN: 2041-8213
DOI: 10.3847/2041-8213/aaf73f