Spiral structure in external galaxies

نویسندگان

چکیده

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Motion Properties of Satellites around External Spiral Galaxies

We are analyzing a sample of closeby galaxy systems, each comprising a bright isolated spiral and its satellites. We find an excess (56%) of prograde satellites over retrograde, which basically holds for all angular displacements from the primary major axis. Monte Carlo simulations show that interlopers and mixing systems at different distances in the sample should not affect porcentages sensibly.

متن کامل

Supershells in Spiral Galaxies

Expanding supershells are perhaps the most prominent manifestation of the violent impact which massive stars have on the gaseous ISM. Commonly thought to be formed as a consequence of mechanical luminosity dumped into the ISM by OB associations, supershells can be viewed as a critical gauge of the energy source which ultimately supports interstellar turbulence. I will review the present underst...

متن کامل

Bars, Spiral Structure, and Secular Evolution in Disk Galaxies

Simulations and observations of galactic bars suggest they do not commonly evolve into bulges, although it is possible that the earliest bars formed bulges long ago, when galaxies were smaller, denser, and had more gas. The most highly evolved of today’s bars may become lenses over a Hubble time. Most galaxies in the early Universe are extremely clumpy, with ∼ 10 −10 M⊙ blue clumps that resembl...

متن کامل

Evolution of Magnetic Fields in Galaxies with Spiral Structure

3 S u m m a r y : We present simulations of the 3D nonlinear induction equation in order to investigate the temporal evolution of large-scale magnetic elds in spiral galaxies. Our model includes diierential rotation, ambipolar diiusion and, based on small-scale turbulence, eddy diiusivity and the tensorial-eeect with magnetic feedback. The nonax-isymmetric spiral pattern and { if considered { t...

متن کامل

Evolution of structure in late-type spiral galaxies

Aims. We study two dimensional Fabry-Perot interferometric observations of the nearby face-on late-type spiral galaxy, NGC 628, in order to analyse the ionized gas component of the interstellar medium. Covering the galaxy out to a radius larger than 12 kpc, and with a spatial sampling of 1. ′′6, we aim to investigate the large-scale dynamics as well as feedback from individual H  regions into...

متن کامل

ذخیره 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: Symposium - International Astronomical Union

سال: 1970

ISSN: 0074-1809

DOI: 10.1017/s007418090000022x