Neutral hydrogen profiles of cluster galaxies

1995 ◽  
Vol 96 ◽  
pp. 1 ◽  
Author(s):  
Jeremy Mould ◽  
Sarah Martin ◽  
Greg Bothun ◽  
John Huchra ◽  
Bob Schommer
Keyword(s):  
Neutral Hydrogen ◽  
Cluster Galaxies

scholarly journals The Strong Transformation of Spiral Galaxies Infalling into Massive Clusters at z~ 0.2

2006 ◽  
Vol 2 (S235) ◽  
pp. 198-198
Author(s):  
L. Cortese ◽  
D. Marcillac ◽  
J. Richard ◽  
H. Bravo-Alfaro ◽  
J.-P. Kneib ◽  
...  
Keyword(s):  
Star Formation ◽  
Galaxy Evolution ◽  
Hubble Space Telescope ◽  
Galactic Disk ◽  
Type System ◽  
Neutral Hydrogen ◽  
Cluster Galaxies ◽  
Tidal Interactions ◽  
Ram Pressure ◽  
Cluster Environment

AbstractWe report the discovery of two peculiar galaxies infalling into the lensing clusters of galaxies Abell 1689 (z~ 0.18) and 2667 (z~ 0.23). Hubble Space Telescope images show extraordinary trails composed by blue bright knots and stellar streams associated with both these systems, an ~L* and ~0.1L* galaxy. Under the combined action of tidal interaction with the cluster potential and of ram pressure by the intra-cluster medium the morphologies and star formation histories of these two galaxies are strongly perturbed. While in the massive system tidal interactions are the dominant effect and are able to produce a sinking of gas towards the galaxy center triggering a strong burst of star formation and changing galaxy's morphology, in the smaller galaxy the effects of gravitation are reduced by ram pressure stripping which blows away the neutral hydrogen from the galactic disk, quenching the star formation activity and transforming a gas rich late type spiral into quiescent disk dominated early type system. This result is a new additional evidence that galaxy mass represents the main driver of galaxy evolution, even during their dive into the harsh cluster environment and can give additional insights on the origin of S0s and dwarf cluster galaxies.

VLA observations of neutral hydrogen in Virgo Cluster galaxies. I - The Atlas

1990 ◽  
Vol 100 ◽  
pp. 604 ◽  
Author(s):  
V. Cayatte ◽  
C. Balkowski ◽  
J. H. van Gorkom ◽  
C. Kotanyi
Keyword(s):  
Neutral Hydrogen ◽  
Virgo Cluster ◽  
Cluster Galaxies

scholarly journals Neutral Hydrogen in Virgo Cluster Galaxies

1973 ◽  
Vol 165 (2) ◽  
pp. 231-244 ◽  
Author(s):  
R. D. Davies ◽  
B. M. Lewis
Keyword(s):  
Neutral Hydrogen ◽  
Virgo Cluster ◽  
Cluster Galaxies

scholarly journals The neutral hydrogen content of Fornax cluster galaxies

2001 ◽  
Vol 376 (1) ◽  
pp. 98-111 ◽  
Author(s):  
A. Schröder ◽  
M. J. Drinkwater ◽  
O.-G. Richter
Keyword(s):  
Hydrogen Content ◽  
Neutral Hydrogen ◽  
Cluster Galaxies ◽  
Fornax Cluster

Neutral hydrogen in X-ray cluster galaxies - A1367

1983 ◽  
Vol 267 ◽  
pp. 511 ◽  
Author(s):  
G. L. Chincarini ◽  
R. Giovanelli ◽  
M. Haynes ◽  
P. Fontanelli
Keyword(s):  
Neutral Hydrogen ◽  
X Ray ◽  
Cluster Galaxies

Motions of neutral hydrogen at high latitudes

1967 ◽  
Vol 31 ◽  
pp. 265-278 ◽  
Author(s):  
A. Blaauw ◽  
I. Fejes ◽  
C. R. Tolbert ◽  
A. N. M. Hulsbosch ◽  
E. Raimond
Keyword(s):  
Surface Density ◽  
Velocity Dispersion ◽  
Neutral Hydrogen ◽  
Hydrogen Gas ◽  
High Latitudes ◽  
Low Velocity

Earlier investigations have shown that there is a preponderance of negative velocities in the hydrogen gas at high latitudes, and that in certain areas very little low-velocity gas occurs. In the region 100° <l< 250°, + 40° <b< + 85°, there appears to be a disturbance, with velocities between - 30 and - 80 km/sec. This ‘streaming’ involves about 3000 (r/100)2solar masses (rin pc). In the same region there is a low surface density at low velocities (|V| < 30 km/sec). About 40% of the gas in the disturbance is in the form of separate concentrations superimposed on a relatively smooth background. The number of these concentrations as a function of velocity remains constant from - 30 to - 60 km/sec but drops rapidly at higher negative velocities. The velocity dispersion in the concentrations varies little about 6·2 km/sec. Concentrations at positive velocities are much less abundant.

Interstellar gas in the central region of the Galaxy

1967 ◽  
Vol 31 ◽  
pp. 239-251 ◽  
Author(s):  
F. J. Kerr
Keyword(s):  
Central Region ◽  
Galactic Plane ◽  
Neutral Hydrogen ◽  
Continuum Emission ◽  
Galactic Centre ◽  
Interstellar Gas ◽  
Hydrogen Recombination ◽  
The Galaxy ◽  
Centre Region ◽  
The Relationship

A review is given of information on the galactic-centre region obtained from recent observations of the 21-cm line from neutral hydrogen, the 18-cm group of OH lines, a hydrogen recombination line at 6 cm wavelength, and the continuum emission from ionized hydrogen.Both inward and outward motions are important in this region, in addition to rotation. Several types of observation indicate the presence of material in features inclined to the galactic plane. The relationship between the H and OH concentrations is not yet clear, but a rough picture of the central region can be proposed.

Variation of the amount of hydrogen along the galactic ridge

1967 ◽  
Vol 31 ◽  
pp. 171-172
Author(s):  
Th. Schmidt-Kaler
Keyword(s):  
Surface Brightness ◽  
Milky Way ◽  
Neutral Hydrogen ◽  
Line Of Sight ◽  
Optical Surface ◽  
Hydrogen Density ◽  
Continuous Radiation ◽  
Galactic Longitude

The integralNHof neutral-hydrogen density along the line of sight is determined from the Kootwijk and Sydney surveys. The run ofNHwith galactic longitude agrees well with that of thermal continuous radiation and that of the optical surface brightness of the Milky Way.

Observations of neutral hydrogen in open clusters

1967 ◽  
Vol 31 ◽  
pp. 41-43
Author(s):  
Th. Schmidt-Kaler ◽  
R. Schwartz
Keyword(s):  
Neutral Hydrogen ◽  
Open Clusters

Neutral hydrogen is found in every young cluster observed, usually extending beyond the optical diameter, and in some cases showing expanding motions.

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