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Massive stars shaping the ISM:Hi holes and shells in nearby galaxies
(The International Astronomical Union, 1999)
Neutral hydrogen (H I) is a magnificent tool when studying the structure of the interstellar medium (ISM) as it is relatively easily observable and can be mapped at good spatial and velocity resolution with modern instruments. ...
Interaction Between NGC 5394 and NGC 5395
(Astronomical Society of the Pacific, 1999)
The spiral galaxies NGC 5394/95 (at a distance of 47 Mpc) are involved in a recent, close, nonmerging encounter. The smaller galaxy, NGC 5394, has two long, fairly symmetric, open tidal arms (see Figure 1); in numerical ...
Ring Structure and Warp of NGC 5907: Interaction with Dwarf Galaxies
(1998)
The edge-on, nearby spiral galaxy NGC 5907 has long been used as the prototype of a “noninteracting” warped galaxy. We report here the discovery of two interactions with companion dwarf galaxies that substantially change ...
Dust Spirals and Acoustic Noise in the Nucleus of the Galaxy NGC 2207
(1998)
Observations with the Hubble Space Telescope reveal an irregular network of dust spiral arms in the nuclear region of the interacting disk galaxy NGC 2207. The spirals extend from »50 to »300 pc in galactocentric radius, ...
X-ray emission from an expanding supergiant shell in IC 2574
(1998)
We present a multiwavelength study of a supergiant shell within the violent interstellar medium of the nearby dwarf galaxy IC 2574, which is a member of the M81 group of galaxies. Neutral hydrogen (H i) observations obtained ...
Detection of a second optical component in the H I cloud of the young dwarf galaxy SBS 0335-052 : New observations with the 6-m telescope
(1997-05-01)
The Blue Compact Dwarf (BCD) galaxy SBS 0335–052 is one of the most metal–deficient galaxies known and one of the best candidates for a young dwarf galaxy in the process of formation. A VLA HI map reveals an unusual ...
Starbursts in H II Galaxies
(1997)
H II galaxies fall at the lower end on the scale of the energy output of their starbursts. Still, they are genuine Starburst Galaxies, producing large numbers of massive stars, and at a rate which is unsustainable in the ...
UGC 12732: A Disk Galaxy Lacking High-Velocity Clouds
(1997)
We used the Very Large Array to obtain high-sensitivity 21cm synthesis images of the disk galaxy UGC 12732. This object did not show high-velocity wings in Arecibo telescope spectra obtained to search for populations of ...