Speaker
Description
Hypercompact HII regions (HC) are regions of ionized gas associated with the earliest stages of high-mass star formation. With the aim of better understanding their characteristics, we have carried out a study of five candidates for HC HII regions. For this, we performed observations with the Jansky Very Large Array (JVLA) at 2 and 6 cm, with an angular resolution of ∼0.900 . As a result, we report the images of the detected sources and the measured parameters. In addition, we explore several possible scenarios, considering both HC HII regions and spherical and collimated winds. Likewise, we have modeled the spectra of these sources as uniform spheres. In general, the sources were unresolved, but by applying the models, we have been able to estimate that their sizes vary in a range of 0.3 to 3.67 mpc, suggesting that they remain candidates for HC HII regions, highlighting G40.28−0.22 as the best representative. We cannot rule out the possibility that some sources are jets or stellar winds.
