A comprehensive analysis using 9 dark matter halo models on the spiral galaxy NGC 4321
نویسندگان
چکیده
This paper addressed the dark matter analysis on spiral galaxy NGC 4321 (M100) by considering nine different profiles, so far lacking in scientific literature, i.e., pseudoisothermal, Burkert, NFW, Moore, Einasto, core-modified, DC14, coreNFW and Lucky13 profiles. In this paper, we analyzed rotation curve using nonlinear fitting of star, gaseous halo equations with selected VLA HI observation data. Among four profiles (DC14, Lucky13, Burkert Moore profiles) showed declining features hence not suitable for galaxy. is concluded to be mainly due characteristics those also varying levels problems within inner region fittings. For remaining five accepted further conducted reduced Chi-square test. Four out lie range 0.40 < $$\chi _{\mathrm{red}}^2$$ 1.70, except core-modified profile. addition, pseudoisothermal profile achieved best nearest 1, its linearity flatness at large radii.
منابع مشابه
On the Spiral Structure of NGC 2915 and Dark Matter
NGC 2915 is a blue compact dwarf galaxy embedded in an extended, low surface brightness H I disk exhibiting a two-armed spiral structure and a central bar-like component. Commonly accepted mechanisms are unable to explain the existence of these patterns and Bureau et al. proposed disk dark matter (scaling with the H I distribution) or a rotating triaxial dark halo as alternative solutions. In a...
متن کاملThe 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 galaxy–dark matter halo connection: which galaxy properties are correlated with the host halo mass?
We demonstrate how the properties of a galaxy depend on the mass of its host dark matter subhalo, using two independent models of galaxy formation. For the cases of stellar mass and black holemass, themedian property value displays amonotonic dependence on subhalomass. The slope of the relation changes for subhalomasses for which heating by active galactic nuclei becomes important. The median p...
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 کاملGalaxy disruption in a halo of dark matter.
The relics of disrupted satellite galaxies have been found around the Milky Way and Andromeda, but direct evidence of a satellite galaxy in the early stages of disruption has remained elusive. We have discovered a dwarf satellite galaxy in the process of being torn apart by gravitational tidal forces as it merges with a larger galaxy's dark matter halo. Our results illustrate the morphological ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Indian Journal of Physics
سال: 2021
ISSN: ['0019-5480', '0974-9845', '0973-1458']
DOI: https://doi.org/10.1007/s12648-021-02027-y