منابع مشابه
Galactic Recycling: the Hi Ring around Ngc 1533
We report the discovery of a new Hi ring around the S0 galaxy NGC 1533. The ring orbits at a radius of 35 kpc, well outside the optical extent of the galaxy. We have conducted N-body/SPH numerical simulations to show this Hi ring could be the merger remnant of a tidally destroyed galaxy. We find no optical component associated with the Hi ring. However, observations hint at Hα emission associat...
متن کامل0 HST Observations of the Wolf - Rayet Nebula NGC 6888
We present Hubble Space Telescope WFPC2 images of a portion of the bright northeast rim of NGC 6888, the nebular shell physically associated with the Wolf-Rayet star HD 192163. The exposures are taken in the light of Hα λ6563, [O III] λ5007, and [S II] λλ6717, 6731. The images are used to constrain models of the ionization structure of nebular features. From these models we infer physical condi...
متن کاملRecycling of ghost galaxies : The origin of giant HI ring around NGC 1533
We propose that the giant HI ring recently discovered by HIPASS for S0 galaxy NGC 1533 is formed by unequal-mass merging between gas-rich LSB (low surface brightness: “ghost”) galaxies and HSB disks. The NGC 1533 progenitor HSB spiral is transformed into a barred S0 during merging and the outer HI gas disk of the LSB is transformed into the giant HI ring. We also discuss two different possibili...
متن کاملHi and Oh Absorption toward Ngc 6240
VLA observations of large-scale HI and OH absorption in the merging galaxy of NGC6240 are presented with 1 arcsec resolution. HI absorption is found across large areas of the extended radio continuum structure with a strong concentration towards the double-nucleus. The OH absorption is confined to the nuclear region. The HI and OH observations identify fractions of the gas disks of the two gala...
متن کاملThe HI halo of NGC 2403
The position-velocity diagram along the major axis of the Sc galaxy NGC 2403 shows the presence of gas with anomalous velocities (see Fig. 3 of the paper by Sancisi et al., this conference). This is the signature of an extended, slower rotating HI halo surrounding the thin disk (Schaap et al., 2000) We have isolated the ‘anomalous gas’ in NGC 2403 by fitting a Gaussian line profile to the thin ...
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ژورنال
عنوان ژورنال: Symposium - International Astronomical Union
سال: 1996
ISSN: 0074-1809
DOI: 10.1017/s0074180900230453