First Evidence of a Precessing Jet Excavating a Protostellar Envelope

We present new, sensitive, near-infrared images of the Class I protostar, Elias 29, in the Ophiuchus cloud core. To explore the relationship between the infall envelope and the outflow, narrowband H sub(2) 1-0 S(1), Brg, and K sub(cont) filters were used to image the source with the Wide-Field Infra...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Veröffentlicht in:The Astrophysical journal 2006-08, Vol.647 (2), p.L159-L162
Hauptverfasser: Ybarra, Jason E, Barsony, Mary, Haisch, Jr., Karl E, Jarrett, Thomas H, Sahai, Raghvendra, Weinberger, Alycia J
Format: Artikel
Sprache:eng
Schlagworte:
Online-Zugang:Volltext bestellen
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung:We present new, sensitive, near-infrared images of the Class I protostar, Elias 29, in the Ophiuchus cloud core. To explore the relationship between the infall envelope and the outflow, narrowband H sub(2) 1-0 S(1), Brg, and K sub(cont) filters were used to image the source with the Wide-Field Infrared Camera on the Hale 5 m telescope and with Persson's Auxiliary Nasmyth Infrared Camera on the Baade 6.5 m telescope. The source appears as a bipolar, scattered light nebula, with a wide opening angle in all filters, as is typical for late-stage protostars. However, the pure H sub(2) emission-line images point to the presence of a heretofore undetected precessing jet. It is argued that high-velocity, narrow, precessing jets provide the mechanism for creating the observed wide-angled outflow cavity in this source.
ISSN:1538-4357
0004-637X
1538-4357
DOI:10.1086/507449