منابع مشابه
Proto–Galactic Starbursts at High Redshift
We have computed the evolving ultraviolet-millimeter spectral energy distribution (SED) produced by proto-galactic starbursts at high redshift, incorporating the chemical evolution of the interstellar medium in a consistent manner. Dust extinction is calculated in a novel way, that is not based on empirical calibrations of extinction curves, but rather on the lifetime of molecular clouds which ...
متن کاملLinear response of galactic halos to adiabatic gravitational perturbations
We determine the response of a self-similar isothermal stellar system to small adiabatic gravitational perturbations. For odd spherical harmonics, the response is identical to the response of the analogous isothermal fluid system. For even spherical harmonics, the response can be regarded as an infinite series of wavetrains in log r, implying alternating compression and rarefaction in equal log...
متن کاملA deep , narrow J – band search for proto – galactic Ly α emission
We present a deep, narrow J–band search for proto–galactic Lyα emission at redshifts z ∼ 9. We combine an exceptionally deep image of the Hubble Deep Field South, obtained using a narrow band filter centred on the wavelength 1.187μm using the VLT/ISAAC facility, with existing deep, broad band images covering optical to near infrared wavelengths. We search for z ∼ 9 Lyα–emitting galaxies display...
متن کاملPerturbations of Intermediate-mass Black Holes on Stellar Orbits in the Galactic Center
We study the shortand long-term effects of an intermediate mass black hole (IMBH) on the orbits of stars bound to the supermassive black hole (SMBH) at the center of the Milky Way. A regularized N-body code including post-Newtonian terms is used to carry out direct integrations of 19 stars in the S-star cluster for 10Myr. The mass of the IMBH is assigned one of four values from 400M⊙ to 4000M⊙,...
متن کاملStability of spherically symmetric steady states in galactic dynamics against general perturbations
Certain steady states of the Vlasov-Poisson system can be characterized as minimizers of an energy-Casimir functional, and this fact implies a nonlinear stability property of such steady states. In previous investigations by Y. Guo and the author stability was obtained only with respect to spherically symmetric perturbations. In the present investigation we show how to remove this unphysical re...
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: Monthly Notices of the Royal Astronomical Society
سال: 1983
ISSN: 0035-8711,1365-2966
DOI: 10.1093/mnras/205.1.207