Deep FAST HI observations of NGC 2768 reveal an extended gas envelope and identify a dark-matter-dominated HI clump, Clump B, as a likely satellite that collided with the galaxy about 0.38 Gyr ago.
2011 MNRAS, 413, 813
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Deep neutral hydrogen observations of the early-type galaxy NGC 2768: collided by a newly discovered satellite galaxy?
Deep FAST HI observations of NGC 2768 reveal an extended gas envelope and identify a dark-matter-dominated HI clump, Clump B, as a likely satellite that collided with the galaxy about 0.38 Gyr ago.