2003/10/14 by Kenji Bekki, Warrick J. Couch, W. J. Couch +8
Chemistry · Physics and Astronomy · #Astronomy #Astronomy and Astrophysical Research #Astrophysics #Astrophysics (astro-ph) #Astrophysics and Star Formation Studies #Chemistry #FOS: Physical sciences #Galaxies: Formation, Evolution, Phenomena #Galaxy #Hubble sequence #Physics #Ring (chemistry) #Spiral galaxy #Star formation #Surface brightness #astro-ph
paper · pdf · doi:10.48550/arxiv.astro-ph/0310358
2 pages, 1 figure (Color GIF file for Figure 1), in the proceedings of IAU 217 ''Recycling intergalactic and interstellar matter
arxiv created 2003/10/14 · openalex publication_date 2003/10/14 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
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 possibilities for the origin of isolated star-forming regions (``ELdot'' objects) in the giant gas ring.