The massive dark halo of the compact early-type galaxy NGC 1281
نویسندگان
چکیده
منابع مشابه
The Distribution of Dark Matter in the Halo of the Early-type Galaxy Ngc 4636
We present the density structure of dark matter in the outer parts (to about 7 effective radii) of the elliptical galaxy NGC 4636, from the radial velocities of 174 globular clusters, using the nonparametric, inverse algorithm CHASSIS. We find the galaxy to be rich in dark matter, with R-band mass-to-light (M/L) ratios rising to about 30, at nearly 4Re; the K-band M/L at about 3Re is found to b...
متن کاملThe shape of the dark matter halo in the early - type galaxy
We present H i observations of the elliptical galaxy NGC 2974, obtained with the Very Large Array. These observations reveal that the previously detected H i disc in this galaxy (Kim et al. 1988) is in fact a ring. By studying the harmonic expansion of the velocity field along the ring, we constrain the elongation of the halo and find that the underlying gravitational potential is consistent wi...
متن کاملThe Disk and Dark Halo Mass of the Barred Galaxy Ngc 4123. Ii. Fluid-dynamical Models
We report a dynamical determination of the separate contributions of disk and dark halo masses to the rotation curve of a spiral galaxy. We use fluid-dynamical models of gas flow in the barred galaxy NGC 4123 to constrain the dynamical properties of the galaxy: disk M/L, bar pattern speed, and the central density and scale radius of the dark halo. We derive a realistic barred potential directly...
متن کاملThe Disk and Dark Halo Mass of the Barred Galaxy Ngc 4123. I. Observations
The non-circular streaming motions in barred galaxies are sensitive to the mass of the bar and can be used to lift the degeneracy between disk and dark matter halo encountered when fitting axisymmetric rotation curves of disk galaxies. In this paper, we present photometric and kinematic observations of NGC 4123, a barred galaxy of modest size (Vrot = 130 km s , L = 0.7L∗), which reveal strong n...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 2015
ISSN: 0035-8711,1365-2966
DOI: 10.1093/mnras/stv2665