Stacked ultra-deep images of dwarf irregular galaxies reveal a pure exponential stellar disk extending to surface brightness of 32.3 mag/arcsec² without a detectable stellar halo, attributed to internal evolutionary processes.
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Holmberg IX is a tidal dwarf galaxy candidate that formed in a burst 130 million years ago but has since quenched star formation in its main body, appearing as a unique inactive young system.
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Ultra-deep imaging of nearby dwarf irregular galaxies: stellar haloes and disk structure
Stacked ultra-deep images of dwarf irregular galaxies reveal a pure exponential stellar disk extending to surface brightness of 32.3 mag/arcsec² without a detectable stellar halo, attributed to internal evolutionary processes.
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Holmberg IX: A Unique, Infant but Inactive Galaxy as Revealed via a Multiwavelength Approach
Holmberg IX is a tidal dwarf galaxy candidate that formed in a burst 130 million years ago but has since quenched star formation in its main body, appearing as a unique inactive young system.