H II regions and high-mass starless clump candidates

The ionization feedback from HII regions modifies the properties of high-mass starless clumps (HMSCs, several hundred to a few thousand solar masses with size ~0.1-1 pc), such as temperature and turbulence, on clump scale. question whether presence core-scale fragmentation star formation in HMSCs remains be explored. We aim investigate difference 0.025 pc-scale between candidate that are strongly impacted by less disturbed ones. also search for evidence mass shaping induced HMSCs. Using ALMA 1.3 mm continuum resolution ~1.3", we imaged eight HMSCs, including four another situated quiet environment. less-impacted selected basis their similar distance compared ones avoid any possible bias linked these parameters. A total 51 cores were detected clumps, three nine each clump. Within our limited sample, did not find clear ~0.025 non-impacted even though seem affect spatial distribution fragmented cores. Both types present thermal two-level hierarchical features at Jeans length ${\lambda_{J, clump}^{th}}$ 0.3${\lambda_{J, clump}^{th}}$. emission morphology AGAL010.214-00.306 AGAL018.931-00.029 sheds light capacities shape gas dust surroundings possibly trigger Future surveys covering large number high turbulence needed confirm trend indicated this study.