2007A&A...475..281G

Query : 2007A&A...475..281G

2007A&A...475..281G - Astronomy and Astrophysics, volume 475, 281-300 (2007/11-3)

Herbig-Haro flows in B335.

GALFALK M. and OLOFSSON G.

Abstract (from CDS):

To study the Herbig-Haro flows in the nearby dark globule B335. To find new HH objects and H₂ knots, make a proper motion map of the flow activity and investigate physical properties through shock models. We have observed optical (Hα and [SII]) and near-IR (2.12µm H₂) deep fields and taken optical spectra using the 2.56m Nordic Optical Telescope, as well as a near-UV deep field (U band) using the 3.58m NTT. In addition we present new SPITZER/IRAC (3.5-8.0µm) and MIPS (24µm) observations. We use previous Hα and 2.12µm H₂ observations taken 15 and 9 years earlier to make proper motion maps. We then investigate the shock physics by matching our spectra with planar shock models. We discover five new HH objects (HH119D-H) in the eastern and one (HH119I) in the western lobe of the outflow. From proper motions we find an optically bright, roughly E-W oriented group with high space velocities (200-280km/s) and a near-IR bright, slower group (15-75km/s) moving to the ESE. We also find a system of at least 15 H₂ knots in the western lobe. This (WNW) counterflow suggests the possibility of a binary outflow source, giving rise to two outflow axes with slightly different orientations. We find that the E-W flow is symmetrical with evidence for two outbursts. We make the first detection of [OI] λλ 6300/63 in HH119B and Hβ in HH119A and B and find their extinctions to be A_V≃1.4 and 4.4, respectively. HH119A is found to expand much faster than expected from linear expansion with distance from the outflow source. Using planar shock models we find shock velocities of ∼60km/s (A) and ∼35km/s (B and C). This agrees with A being of higher excitation than B and C. In our U image we detect three of the HH objects and propose that the emission arise from the [OII]λ3728 line and the blue continuum. New SPITZER/IRAC and MIPS observations show most of the HH objects at 4.5µm and a E-W elongated hour-glass shaped structure at the outflow source. Even at 24µm it is not clear whether most of the light is direct or reflected.

Abstract Copyright: ∼

Journal keyword(s): ISM: jets and outflows - infrared: ISM - ISM: lines and bands - stars: formation - ISM: individual objects: B335 - ISM: individual objects: HH119

VizieR on-line data: <Available at CDS (J/A+A/475/281): images.dat fit/*>

Nomenclature: Figs 1, 2, Table 2: [GO2007b] IR Na (Nos 1-8, 6 missing, 4a-4b, 7a-7c, 8a-8o).

Simbad objects: 39

Full paper

View the references in ADS

Number of rows : 39

N	Identifier	Otype	ICRS (J2000) RA	ICRS (J2000) DEC	Mag V	Sp type	#ref 1850 - 2023	#notes
1	HH 34	HH	05 35 31.30	-06 28 43.0	16	~	482	2
2	[GO2007b] IR 8o	PoC	09 36 46.0	+07 34 26		~	1	0
3	HH 119I	HH	19 36 45.41	+07 34 40.2		~	1	0
4	[GO2007b] IR 8m	PoC	19 36 46.0	+07 34 26		~	1	0
5	[GO2007b] IR 8a	PoC	19 36 46.0	+07 34 26		~	1	0
6	[GO2007b] IR 8g	PoC	19 36 46.0	+07 34 26		~	1	0
7	[GO2007b] IR 8e	PoC	19 36 46.0	+07 34 26		~	1	0
8	[GO2007b] IR 8l	PoC	19 36 46.0	+07 34 26		~	1	0
9	[GO2007b] IR 8c	PoC	19 36 46.0	+07 34 26		~	1	0
10	[GO2007b] IR 8k	PoC	19 36 46.0	+07 34 26		~	1	0
11	[GO2007b] IR 8h	PoC	19 36 46.0	+07 34 26		~	1	0
12	[GO2007b] IR 8j	PoC	19 36 46.0	+07 34 26		~	1	0
13	[GO2007b] IR 8b	PoC	19 36 46.0	+07 34 26		~	1	0
14	[GO2007b] IR 8d	PoC	19 36 46.0	+07 34 26		~	1	0
15	[GO2007b] IR 8i	PoC	19 36 46.02	+07 34 29.1		~	1	0
16	[GO2007b] IR 8f	PoC	19 36 46.23	+07 34 27.2		~	1	0
17	[GO2007b] IR 7c	PoC	19 36 50.93	+07 34 06.5		~	1	0
18	HH 119A1	HH	19 36 51.32	+07 34 10.5		~	1	0
19	[GO2007b] IR 7a	PoC	19 36 51.39	+07 34 12.7		~	1	0
20	HH 119A3	HH	19 36 51.46	+07 34 15.2		~	1	0
21	HH 119A2	HH	19 36 51.47	+07 34 06.8		~	1	0
22	HH 119	HH	19 36 51.5	+07 34 10		~	15	0
23	[GO2007b] IR 7b	PoC	19 36 51.53	+07 34 05.4		~	1	0
24	HH 119A	HH	19 36 51.57	+07 34 10.4		~	8	0
25	LDN 663	DNe	19 36 55	+07 34.4		~	619	0
26	HH 119B	HH	19 36 57.26	+07 34 06.3		~	11	0
27	[GO2007b] IR 1	IR	19 36 57.38	+07 34 02.7		~	2	0
28	[HSW99] B 335 SMM 1	cor	19 37 00.7	+07 34 08		~	24	0
29	IRAS 19345+0727	FIR	19 37 01.03	+07 34 10.9		~	66	0
30	[GO2007b] IR 3	IR	19 37 03.94	+07 33 48.6		~	2	0
31	HH 119G	HH	19 37 04.75	+07 33 38.3		~	1	0
32	HH 119C	HH	19 37 04.79	+07 34 06.8		~	11	0
33	[GO2007b] IR 4	IR	19 37 05.05	+07 33 38.0		~	2	0
34	[GO2007b] IR 5	IR	19 37 05.39	+07 34 11.5		~	2	0
35	[GO2007b] IR 4b	PoC	19 37 05.77	+07 33 39.3		~	1	0
36	HH 119D	HH	19 37 05.82	+07 34 07.2		~	4	0
37	HH 119E	HH	19 37 09.19	+07 34 06.5		~	4	0
38	HH 119F	HH	19 37 09.39	+07 33 46.0		~	4	0
39	HH 119H	HH	19 37 10.22	+07 33 56.8		~	1	0

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