منابع مشابه
Observations of Disk Galaxy Evolution
The morphologies of disk galaxies begin to deviate systematically from those of nearby galaxies at surprisingly low redshifts, possibly as low as z = 0.3. This corresponds to a time ∼ 3.5 Gyr in the past, which is only one quarter of the present age of the Universe. Beyond z = 0.5 (a look-back time of 5 Gyr) the effects of evolution on spiral structure are rather obvious: spiral arms are less w...
متن کاملGas Dynamics in the LINER Galaxy NGC5005: Episodic Fueling of a Nuclear Disk
We report high-resolution CO(1–0) observations in the central 6 kpc (1) of the LINER galaxy NGC5005 with the Owens Valley Radio Observatory millimeter array. Molecular gas is distributed in three components — a ring at a radius of about 3 kpc, a strong central condensation, and a stream to the northwest of the nucleus but inside the 3 kpc ring. The ring shows systematic noncircular motions, wit...
متن کاملResolving Gas Dynamics in the Circumnuclear Region of a Disk Galaxy in a Cosmological Simulation
Using a hydrodynamic adaptive mesh refinement code, we simulate the growth and evolution of a galaxy, which could potentially host a supermassive black hole, within a cosmological volume. Reaching a dynamical range in excess of 10 million, the simulation follows the evolution of the gas structure from super-galactic scales all the way down to the outer edge of the accretion disk. Here, we focus...
متن کاملGas Dynamics and Inflow in gas - rich Galaxy Mergers
We performed N-body/SPH simulations of merging gas-rich disk galaxies with mass ratios of 1:1 and 3:1. A stellar disk and bulge component and a dark halo was realized with collisionless particles, the gas was represented by SPH particles. Since we did not include star formation we focused on the gas dynamics and its influence on the structure of merger remnants. We find that equal-mass mergers ...
متن کاملLarge - scale gas disk around the radio galaxy Coma A ?
We present WSRT and VLA radio observations of the neutral hydrogen in the radio galaxy Coma A. We detect extended H I absorption against both radio lobes of Coma A, at distances of about 30 kpc from the centre. Coma A is the first radio galaxy in which H I is seen in absorption at such large distances from the nucleus. The match between the velocities of the neutral hydrogen and those of the ex...
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ژورنال
عنوان ژورنال: Symposium - International Astronomical Union
سال: 1985
ISSN: 0074-1809
DOI: 10.1017/s007418090024326x