Optical imaging of L723: the structure of HH 223

Bibcode
2006A&A...454..233L
DOI
10.1051/0004-6361:20065183
López, R.; Estalella, R.; Gómez, G.; Riera, A.
Bibliographical reference

Astronomy and Astrophysics, Volume 454, Issue 1, July IV 2006, pp.233-238

Advertised on:
7
2006
Journal
Astronomy and Astrophysics
Number of authors
4
IAC number of authors
1
Citations
8
Refereed citations
7
Description
Aims.We imaged the Lynds 723 dark nebula (L723) with the aim of studying the morphology of the Herbig-Haro object HH 223 and other line-emission nebula detected in the region. Methods: .We obtained deep narrow-band images in the Hα and [SII] lines and in the continuum nearby Hα of a field of ˜ 5' of the L723 dark nebula centered on HH 223. Results: .The Hα and [SII] images reveal the detailed morphology of HH 223, unresolved in previous optical images. Both images show a quite complex knotty, wiggling structure embedded in a low-emission nebula. Comparison between the [SII] and Hα fluxes of the knots are indicative of variations in the excitation conditions through HH 223. In addition, several other faint nebula are detected in Hα a few arcmin to the SE and to the NW of HH 223, all of them lying projected onto the east-west pair of lobes of the quadrupolar CO outflow. Comparison between the Hα and the continuum images confirms the HH-like nature of the Vrba object V83, while the Vrba objects V84 and V85 are identified as faint field stars.
Type
Refereed
Herbig-Haro objects

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