Multifrequency study of HH 137 and HH 138: discovering new knots and a molecular outflow with Gemini and APEX

L. FERRERO; C. CAPPA; M. GOMEZ; H. SALDAÑO; G. GUNTHARDT; M. RUBIO

Córdoba

Congreso; FOF meeting 2019; 2019

IATE y Observatorio Astronómico de Córdoba

Jets and outflows are the first signposts of stellar birth and can be observed over a wide range of wavelengths, from the ultraviolet to the radio. The study of these events can provide a better understanding of how the stars form, how they interact wiht their environments. We present results of a study of the jets HH 137 and HH 138 using Gemini images and APEX molecular line data, as well as archive images from diverse surveys from the optical to sub-milimeter. Several 2.12 micron knots linked to HH 137 are identified on the Gemini image. Many extended 4.5 micron emissions are found in a larger area than that covered by the Gemini image, including not only HH 137 but also HH138. 12CO(3-2), 13CO(3-2), and C18O(3-2) molecular lines data reveal the molecular counterpart of HH137. Spitzer combined images suggest the location of the exciting source of HH 137/138, almost coincident with a high-density molecular clump detected in the C18O(3-2) line, in the cold dust emission at 870 micron and in high-density tracers, such as HCO+(3-2) and HCN(3-4). We derive physical parameters of the molecular clump and the molecular outflow and propose a simple scenario for the whole complex.