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The Archetypal Ultra-diffuse Galaxy, Dragonfly 44, Is not a Dark Milky Way

  • Authors: Ákos Bogdán

2020 The Astrophysical Journal Letters 901 L30.

  • Provider: AAS Journals

Caption: Figure 1.

0.5–8 keV band exposure corrected Chandra (left panel) and XMM-Newton (right panel) images of a 4′ × 4′ region around DF 44. No diffuse X-ray emission, originating from hot gaseous emission and/or the population of unresolved X-ray binaries, is detected. In addition, no resolved X-ray sources are detected either from GC-LMXBs or from a nuclear source. The lack of statistically significant X-ray emission implies that the dark matter halo of DF 44 is not comparable with L galaxies.

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