Here we report the half-light radius of the Milky Way, derived from a new measurement of the age-resolved Galactic surface brightness profile in an unprecedentedly wide radial range from ${m R=0}$ to 17~kpc. We find a broken surface brightness profile with a nearly flat distribution ...
This broken profile results in a half-light radius of 5.75卤0.38kpc, significantly larger than that inferred from a single-exponential disk profile but consistent with that of local disk galaxies of similar mass. We also confirm that the size growth history of the Milky Way is broadly ...
et al. A star in a 15.2 year orbit around the supermassive black hole at the centre of the Milky Way. Nature 419, 694–696 (2002) Article ADS Google Scholar Ghez, A. M. et al. Stellar orbits around the Galactic Center black hole. Astrophys. J. 620, 744–757 (2005) Article ADS...
An almost head-on collision as the origin of two off-centre rings in the Andromeda galaxy The unusual morphology of the Andromeda galaxy (Messier 31, the closest spiral galaxy to the Milky Way) has long been an enigma. Although regarded for deca... DL Block,F Bournaud,F Combes,... -...
Gas column density,emission(EM)and dispersion(DM)measure have been computed from inside the simulated disk at a position of 8 kpc from the center and in several directions. Our preliminary results reveal that the distribution of hot gas is non-isotropic according with observations(Gupta et al. ...
Using the new size indicator, the observed scatter of the size–mass relation (0.1 dex) decreases by a factor of 2 compared to that using the effective radius. At a fixed stellar mass, Milky Way-like (MW-like; Mstellar 5 × 1010 M⊙) disc galaxies have,...
Using a new, high-resolution cosmological hydrodynamic simulation of a Milky Way-type (MW-type) galaxy, we explore how a merger-rich assembly history affects the mass budget of the central supermassive black hole (SMBH). We examine a MW-mass halo at the present epoch whose evolution is ...
Milky Way GalaxyMolecular CloudsMass DistributionRadiiSize DistributionUsing observational results on dwarf and giant molecular clouds, a size (r) of not less than 0.1 pc, and a mass distribution (M) of not less than two solar masses is determined for cloud formations in the spiral arms of ...
Thelowest mass galaxies in our sample are comparable to the brightest Milky Waysatellites in stellar mass (10^7 solar masses) and have well-determined halflight radii of 0."05 (~0.3 kpc).doi:10.1088/0004-637X/734/2/104Newton, Elisabeth R....
les of hydrogen gas in Milky Way Galaxy. In the DRAGON code, we have implemented our chosen density pro?les, based on realistic obser-vations in radio, X-ray and 纬-ray wavebands, and hydrodynamical simulations of interstellar hydrogen gas to study the variation in the height of the halo...