2006A&A...454..233L

Query : 2006A&A...454..233L

2006A&A...454..233L - Astronomy and Astrophysics, volume 454, 233-238 (2006/7-4)

Optical imaging of L723: the structure of HH 223.

LOPEZ R., ESTALELLA R., GOMEZ G. and RIERA A.

Abstract (from CDS):

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. 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. 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.

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Journal keyword(s): ISM: jets and outflows - ISM: individual objects: L723 - ISM: individual objects: HH 223 - stars: formation - ISM: Herbig-Haro objects

Nomenclature: Fig.1, Table 1: [LEG2006] L723 WN (Nos N1, N2), [LEG2006] HH 223-WWN (Nos SE1-SE2, NW1-NW2).

Simbad objects: 25

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Number of rows : 25
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 [LEG2006] HH 223-NW2 ISM 19 17 46.8 +19 13 12           ~ 4 0
2 [LEG2006] HH 223-NW1 ISM 19 17 47.3 +19 13 01           ~ 4 0
3 [PE99] H2-NW ISM 19 17 51.6 +19 12 40           ~ 4 0
4 NAME LDN 723 VLA 1 Rad 19 17 52.91 +19 12 08.9           ~ 15 0
5 [S2009] L723 XMM 8 * 19 17 53.1327617040 +19 12 16.426495764           ~ 38 0
6 NAME LDN 723 VLA 2 Rad 19 17 53.67 +19 12 19.5           ~ 26 0
7 [PE99] K1 ISM 19 17 54.2 +19 12 19           ~ 5 0
8 [PE99] K2 ISM 19 17 54.3 +19 12 15           ~ 5 0
9 [LEG2006] L723 N2 ISM 19 17 55.0 +19 11 53           ~ 3 0
10 HH 223F3 HH 19 17 56.56 +19 11 52.9           ~ 3 0
11 HH 223F1 HH 19 17 56.66 +19 11 50.9           ~ 4 0
12 HH 223F2 HH 19 17 56.66 +19 11 53.4           ~ 2 0
13 HH 223E HH 19 17 57.03 +19 11 52.1           ~ 5 0
14 HH 223D HH 19 17 57.30 +19 11 53.0           ~ 4 0
15 HH 223 HH 19 17 57.4 +19 11 53           ~ 10 0
16 HH 223C HH 19 17 57.43 +19 11 53.3           ~ 5 0
17 HH 223B HH 19 17 57.72 +19 11 50.1           ~ 4 0
18 HH 223A HH 19 17 57.97 +19 11 50.7           ~ 5 0
19 [LEG2006] L723 N1 ISM 19 17 59.0 +19 11 42           ~ 3 0
20 [LEG2006] HH 223-SE2 ISM 19 18 04.3 +19 11 16           ~ 3 0
21 [VLS86] LDN 723 83 * 19 18 06.0 +19 11 21           ~ 3 0
22 [LEG2006] HH 223-SE1 ISM 19 18 06.1 +19 11 21           ~ 3 0
23 LDN 723 DNe 19 18 12 +19 13.6           ~ 155 0
24 [VLS86] LDN 723 85 * ~ ~           ~ 2 0
25 [VLS86] LDN 723 84 * ~ ~           ~ 2 0

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