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Jets and outflows are associated with young stellar objects across thestellar mass spectrum, from brown dwarf protostars to massive, Ae/Be stars.Frequently, the jet morphology is spatially discontinuous because of thetemporal variability of the ejection from the driving source. Images covering awide field of view around the jet driving-source are useful to map thelarge-scale jet emission and to explore the mass ejection history. The aim ofthis work was to search for large-scale optical Herbig-Haro (HH) objects lyingin a wide field around a sample of IRAS sources, candidates to trace youngstellar objects. Deep, narrow-band images through the H$\alpha$ and [SII]emission lines, and through an off-line continuum filter, covering a wide($\sim15'$) field around the IRAS targets were acquired. The images in thethree filters were analyzed to identify shock-excited line emission (i.e., HH)in contrast to scattered line emission. New images of a sample of fifteen IRASsources, obtained in an homogeneous way are presented. HH emission was detectedin six fields, and the astrometry of the knot features is given. The nature ofthe extended emission as scattered emission around nine of the IRAS targets isconfirmed. For seven IRAS sources, with unclear optical counterpart, a moreplausible counterpart is proposed. A refined value of the source distance isreported for seven targets. An update of the main data available for each ofthe sampled fields, including images from public data archives, is alsopresented.

A survey of IRAS young stellar object candidates. Searching for large-scale Herbig-Haro objects