A SEARCH FOR HERBIG-HARO OBJECTS IN NGC 7023 AND BARNARD 175

作者：Rector T A^*; Schweiker H

来源：Astronomical Journal, 2013, 145(2): 35.

DOI：10.1088/0004-6256/145/2/35

• Herbig-Haro objects
• ISM: individual objects (NGC 7023, B175)
• ISM: jets and outflows
• stars: formation

Wide-field optical imaging was obtained of the cluster and reflection nebula NGC 7023 and the Bok globule B175. We report the discovery of four new Herbig-Haro (HH) objects in NGC 7023, the first HH objects to be found in this region. They were first detected by their H alpha and [S II] emission but are also visible at 3.6 and 4.5 mu m in archival Spitzer observations of this field. These HH objects are part of at least two distinct outflows. Both outflows are aligned with embedded "Class I" young stellar objects in a tight group on the western edge of the nebula. One of the outflows may have a projected distance of 0.75 pc, which is a notable length for an embedded source. No new HH objects were discovered in B175. However, we reclassify the knot HH450X, in B175, as a background galaxy. The discovery that HH 450X is not a shock front weakens the argument that HH 450 and SNR G110.3+11.3 are co-located and interacting.

• 出版日期2013-2