A multiwavelength study of the H II region G347.600 + 00.211 and its effects on the surrounding medium

S. B. CÁRDENAS; S. CICHOWOLSKI; L. A. SUAD; J. A. MOLINA LERA; R. GAMEN; L. RIZZO

Congreso; 63 reunión anual de la Asociación Argentina de Astronomía; 2021

Observatorio Astronómico de Córdoba

We present a multiwavelength investigation of the H II region G347.600+00.211, located at a distance of 7.9 kpc. We analysethe gas and dust properties aiming to disentangle the origin of the region as well as its role in the formation of new stars.G347.600 + 00.211 is very conspicuous at 1420 MHz and infrared wavelengths, showing an incomplete shell-like structure withtwo distinct zones of very intense emission. The infrared bubble S8 is part of the shell structure. The spatial distribution of themolecular gas shows the presence of six clouds located around the ionized region and showing a good morphological correlationwith the 8-μm emission. Cold dust is coincident with the dense gas shown in the CO measurements. As for the origin of theregion, we found that the massive cluster [DBS2003]179 and two Wolf–Rayet (WR) stars are located at the same distance thanthe ionized gas. Based on a stellar density analysis, we inferred that one of the WR stars, 1181-81L, is also a probable memberof the cluster. Both the cluster and the WR stars are not only within the ring-like structure, but are also located near the two spotsof very heightened emission, suggesting they may be responsible for this bright emission. Finally, as expanding H II regionsare hypothesized to trigger star formation, we used different infrared point source catalogues to search for young stellar objectcandidates (cYSOs). A total of 33 cYSOs and 4 CH II regions were identified projected on to the photodissociation regions andmolecular clouds.