Galactic disks evolve secularly through transient, self-quenching spiral episodes excited non-resonantly by mild gradients (cavernae), with high-multiplicity spirals dominating in cold disks and lower-multiplicity ones in warmer disks as heating efficiency changes.
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FUV imaging shows ongoing massive star formation in the extended low-density outskirts of NGC2090, with smaller complexes, rising specific SFR, and flux ratios consistent with a top-heavy IMF.
citing papers explorer
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Nexae in caverna: the secular evolution of disks via collectively excited, transient spiral structure
Galactic disks evolve secularly through transient, self-quenching spiral episodes excited non-resonantly by mild gradients (cavernae), with high-multiplicity spirals dominating in cold disks and lower-multiplicity ones in warmer disks as heating efficiency changes.
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Star Formation Beyond the Optical Disk : The Low-Density Outskirts of NGC2090
FUV imaging shows ongoing massive star formation in the extended low-density outskirts of NGC2090, with smaller complexes, rising specific SFR, and flux ratios consistent with a top-heavy IMF.