All articles tagged with #stellar structure
Observations show that interactions with more massive galaxies can strip dwarf galaxies of their stars, leaving behind only their dense central star clusters. This process has been observed in the Virgo galaxy cluster, where dwarf galaxies have been transformed into ultra-compact dwarf galaxies. These findings shed light on the profound effects of cluster environments on the stellar structure and evolution of galaxies.
The James Webb Space Telescope (JWST) has been used to observe GN20, a luminous dusty star-forming galaxy. The observations reveal a clumpy stellar structure with a diameter of approximately 45,600 light years and kinematics consistent with that of a massive rotating disk. GN20 has a stellar structure characterized by a luminous unresolved nucleus and a diffuse extended envelope, forming new stars at a constant, high rate of about 500 solar masses per year. The nucleus is less than 2,600 light years in size, carries 9% of the total flux and coincides with the compact, cold dust nuclear emission.