منابع مشابه
Mass of the Galaxy Inferred from Outer Rotation Curve
Using an outer rotation curve of the Galaxy, we explore the galactic constants and the mass of the Galaxy. We show that Θ0 of 200 km s −1 is more favorable than the IAU standard value of 220 km s, and also show that if Θ0 is smaller than 207 km s −1 the rotation curve beyond 2R0 is declining in Keplerian fashion. In the case of Θ0= 200 km s −1 and R0= 7.6 kpc, the total mass and the extent of t...
متن کامل0 Signatures of Galaxy - Cluster Interactions : Spiral Galaxy Rotation Curve Asymmetry , Shape , and Extent
The environmental dependencies of the characteristics of spiral galaxy rotation curves are studied in this work. We use our large, homogeneously collected sample of 510 cluster spiral galaxy rotation curves to test the claim that the shape of a galaxy’s rotation curve strongly depends on its location within the cluster, and thus presumably on the strength of the local intracluster medium and on...
متن کاملThe survival of the Sgr dwarf galaxy and the flatness of the rotation curve of the Galaxy
How has the “fluffy” core of the Sgr dwarf galaxy survived multiple strong shocks from the tidal force of the Galactic halo and disc since the formation of the core a Hubble time ago? A scenario that Sgr was deflected to its current orbit by the Magellanic Clouds after a rendezvous on the north Galactic pole 2− 3 Gyrs ago is examined. It is shown that the conditions of the collision fix both th...
متن کاملUnified Rotation Curve of the Galaxy — Decomposition into de Vaucouleurs Bulge , Disk , Dark Halo , and the 9 - kpc Rotation Dip —
We present a unified rotation curve of the Galaxy re-constructed from the existing data by re-calculating the distances and velocities for a set of galactic constants R0 =8 kpc and V0 =200 km s . We decompose it into a bulge with de Vaucouleurs-law profile of half-mass scale radius 0.5 kpc and mass 1.8×10M⊙, an exponential disk of scale radius 3.5 kpc of 6.5× 10M⊙, and an isothermal dark halo o...
متن کاملPseudo Rotation Curve connecting the Galaxy , Dark Halo , and Local Group
We construct a Galacto-Local Group rotation curve, combining the Galactic rotation curve with a diagram, where galacto-centric radial velocities of outer globular clusters and member galaxies of the Local Group are plotted against their galacto-centric distances. The high-velocity ends of this pseudo rotation curve within a radius R ∼ 150 kpc are well traced by a rotation curve calculated for t...
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ژورنال
عنوان ژورنال: Publications of the Astronomical Society of Japan
سال: 1997
ISSN: 0004-6264,2053-051X
DOI: 10.1093/pasj/49.4.453