Matches in SemOpenAlex for { <https://semopenalex.org/work/W2049062775> ?p ?o ?g. }
- W2049062775 endingPage "76" @default.
- W2049062775 startingPage "76" @default.
- W2049062775 abstract "Simulations of the formation of late-type spiral galaxies in a cold dark matter LCDM universe have traditionally failed to yield realistic candidates. Here we report a new cosmological N-body/SPH simulation of extreme dynamic range in which a close analog of a Milky Way disk galaxy arises naturally. Termed Eris, the simulation follows the assembly of a galaxy halo of mass Mvir=7.9x10^11 Msun with a total of N=18.6 million particles (gas + dark matter + stars) within the final virial radius, and a force resolution of 120 pc. It includes radiative cooling, heating from a cosmic UV field and supernova explosions, a star formation recipe based on a high gas density threshold (nSF=5 atoms cm^-3 rather than the canonical nSF=0.1 atoms cm^-3), and neglects AGN feedback. At the present epoch, the simulated galaxy has an extended rotationally-supported disk with a radial scale length Rd=2.5 kpc, a gently falling rotation curve with circular velocity at 2.2 disk scale lenghts of V2.2=214 km/s, a bulge-to-disk ratio B/D=0.35, and a baryonic mass fraction that is 30% below the cosmic value. The disk is thin, is forming stars in the region of the Sigma_SFR - Sigma_HI plane occupied by spiral galaxies, and falls on the photometric Tully-Fisher and the stellar mass-halo virial mass relations. Hot (T>3x10^5 K), X-ray luminous halo gas makes only 26% of the universal baryon fraction and follows a flattened density profile proportional to r^-1.13 out to r=100 kpc. Eris appears then to be the first cosmological hydrodynamic simulation in which the galaxy structural properties, the mass budget in the various components, and the scaling relations between mass and luminosity are all consistent with a host of observational constraints. (Abridged)" @default.
- W2049062775 created "2016-06-24" @default.
- W2049062775 creator A5003731145 @default.
- W2049062775 creator A5005306009 @default.
- W2049062775 creator A5040270674 @default.
- W2049062775 creator A5084019885 @default.
- W2049062775 date "2011-11-08" @default.
- W2049062775 modified "2023-10-16" @default.
- W2049062775 title "FORMING REALISTIC LATE-TYPE SPIRALS IN A ΛCDM UNIVERSE: THE ERIS SIMULATION" @default.
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- W2049062775 doi "https://doi.org/10.1088/0004-637x/742/2/76" @default.
- W2049062775 hasPublicationYear "2011" @default.
- W2049062775 type Work @default.