Searches for HH objects in star formation regions. VII. Herbig-Haro objects in the region of the nebula GM 2–41

Abstract

Five new Herbig-Haro objects (HH 1036(HH -1040 have been discovered in the neighborhood of the nebula GM 2-41 in a region with an area of 14'×14', at the center of the HII region DR 15 located in the southern periphery of the Cyg OB2 association. Four of them have a complex structure typical of HH flows.Hydrogen molecular emission is detected in the object HH 1036 using archived images from the Spitzer telescope. Two new infrared nebulae illuminated by very red young stellar objects are also found.

Searches for HH-objects and emission stars in star-formation regions. VIII. Stars with Hα emission in the vicinity of the nebula GM 2-41

“…1, which is a slitless spectroscopy image of the region. Some of the HH objects observed in this region [1] are also indicated there. In addition, almost all the emission stars listed in Table 2 are labelled with the same numbers as on the finding chart in Fig.…”

“…All of the stars with Hα emission discovered here are indicated, along with several HH objects[1].It can be seen clearly in the J -H/H -K diagram that the overwhelming bulk of the detected emission stars lie along the T Tau locus and only four of them lie to the side (Nos.22, 27, 29, and 30). Of these last stars, two (Nos.27 and 29), lie almost on the reddening line for classical Be stars.…”

“…These estimates may, however, be affected by observational selection, since the distance to DR 15 is substantially greater than that to Lk Hα 101 (about 707 pc) [25] and even more so than that to the cluster IC 348 (about 300 pc) [24]. On the other hand, several Herbig-Haro objects, which form substantially extended flows [1], have been found in the group of T Tau stars. In the meantime, no directed flows have been detected in the regions of Lk Hα 101 and IC 348, even though they are at smaller distances.…”

“…This article is the second part of our earlier paper [1] which examined the Herbig-Haro objects (HH-objects)…”