Globules and pillars in Cygnus X IV. Velocity-resolved [OI] 63 mu map of a peculiar proplyd-like object
N. Schneider (I. Physik. Institut, Universit"at zu K"oln, Germany), S. Dannhauer (I. Physik. Institut, Universit"at zu K"oln, Germany, MPIfR Bonn, Germany), E. Keilmann (I. Physik. Institut, Universit"at zu K"oln, Germany), S. Kabanovic (I. Physik. Institut, Universit"at zu K"oln, Germany), T. Topkaras (I. Physik. Institut, Universit"at zu K"oln, Germany), V. Ossenkopf-Okada (I. Physik. Institut, Universit"at zu K"oln, Germany), R. Higgins (I. Physik. Institut, Universit"at zu K"oln, Germany), A. Brunthaler (MPIfR Bonn, Germany), Won-Ju Kim (I. Physik. Institut, Universit"at zu K"oln, Germany, MPIfR Bonn, Germany), F. Comeron (ESO, Garching, Germany), M. Roellig (Physikalischer Verein, Frankfurt, Germany, I. Physik. Institut, Universit"at zu K"oln, Germany), T. Csengeri (LAB Universite de Bordeaux, Pessac, France), R. Simon (I. Physik. Institut, Universit"at zu K"oln, Germany), Y. Okada (I. Physik. Institut, Universit"at zu K"oln, Germany), M. Justen (I. Physik. Institut, Universit"at zu K"oln, Germany), S. A. Dzib (MPIfR Bonn, Germany), G. N. Ortiz-Le’on (Instituto Nacional de Astrof’isica, Puebla, Mexico)
arXiv:2511.21800v1 Announce Type: new
Abstract: We investigated an isolated, globule-shaped object (0.37×0.11 pc), located near the centre of the Cygnus OB2 cluster and named proplyd #7 in optical observations. The source can be a massive star (with or without disc) with a HII region or a G-type T Tauri star with a photo-evaporating disc, embedded in a molecular envelope. We obtained a map of the OI line at 63 micron with 6″ angular resolution and employed archival data of the CII 158 micron line (14″ resolution), using the upGREAT heterodyne receiver aboard SOFIA. We also collected IRAM 30m CO data at 1mm (11″ resolution). All the lines were detected across the whole object. The peak integrated OI emission of ~5 K km/s is located ~10″ west of an embedded YSO. The OI and CII data near the source show bulk emission at ~11 km/s and a line wing at ~13 km/s, while the 12CO 2-1 data reveal additional blue-shifted high-velocity emission. The KOSMA-tau PDR model can explain the emissions in the tail with a low external UV field (arXiv:2511.21800v1 Announce Type: new
Abstract: We investigated an isolated, globule-shaped object (0.37×0.11 pc), located near the centre of the Cygnus OB2 cluster and named proplyd #7 in optical observations. The source can be a massive star (with or without disc) with a HII region or a G-type T Tauri star with a photo-evaporating disc, embedded in a molecular envelope. We obtained a map of the OI line at 63 micron with 6″ angular resolution and employed archival data of the CII 158 micron line (14″ resolution), using the upGREAT heterodyne receiver aboard SOFIA. We also collected IRAM 30m CO data at 1mm (11″ resolution). All the lines were detected across the whole object. The peak integrated OI emission of ~5 K km/s is located ~10″ west of an embedded YSO. The OI and CII data near the source show bulk emission at ~11 km/s and a line wing at ~13 km/s, while the 12CO 2-1 data reveal additional blue-shifted high-velocity emission. The KOSMA-tau PDR model can explain the emissions in the tail with a low external UV field (