A&A 612, A73 (2018) https://doi.org/10.1051/0004-6361/201730917 Astronomy & © ESO 2018 Astrophysics Binary energy source of the HH 250 outflow and its circumstellar environment? Fernando Comerón1, Bo Reipurth2, Hsi-Wei Yen3, and Michael S. Connelley2,?? 1 European Southern Observatory, Alonso de Córdova 3107, Vitacura, Santiago, Chile e-mail:
[email protected] 2 Institute for Astronomy, University of Hawaii at Manoa, 640 N. Aohoku Place, Hilo HI 96720, USA 3 European Southern Observatory, Karl-Schwarzschild-Strasse 2, 85748 Garching bei München, Germany Received 3 April 2017 / Accepted 28 December 2017 ABSTRACT Aims. Herbig-Haro flows are signposts of recent major accretion and outflow episodes. We aim to determine the nature and properties of the little-known outflow source HH 250-IRS, which is embedded in the Aquila clouds. Methods. We have obtained adaptive optics-assisted L-band images with the NACO instrument on the Very Large Telescope (VLT), together with N- and Q-band imaging with VISIR also on the VLT. Using the SINFONI instrument on the VLT we carried out H- and K-band integral field spectroscopy of HH 250-IRS, complemented with spectra obtained with the SpeX instrument at the InfraRed Telescope Facility (IRTF) in the JHKL bands. Finally, the SubMillimeter Array (SMA) interferometer was used to study the circum- stellar environment of HH 250-IRS at 225 and 351 GHz with CO (2–1) and CO (3–2) maps and 0.9 mm and 1.3 mm continuum images. Results. The HH 250-IRS source is resolved into a binary with 000: 53 separation, corresponding to 120 AU at the adopted distance of 225 pc.