2000A&A...353..153B

Query : 2000A&A...353..153B

2000A&A...353..153B - Astronomy and Astrophysics, volume 353, 153-162 (2000/1-1)

Multi-wavelength imaging of the peculiar Vela Molecular Ridge nebula BBW 192E.

BURKERT A., STECKLUM B., HENNING T. and FISCHER O.

Abstract (from CDS):

We present the first images of the nebula BBW 192E at near- and mid-infrared wavelengths as well as a 1.3mm continuum map. The nebula BBW 192E is associated with the IRAS point source 08513-4201 which has a luminosity of about 1400L_☉ and a strongly rising spectral energy distribution towards mid-infrared wavelengths. The infrared images show a pronounced bipolar nebula, which is offset by about 10" from the known optical emission, as well as several point sources. We interpret this morphology as evidence for an inclined disk-like structure and scattered light emerging from the lobes. This is supported by our near-infrared imaging polarimetry at sub-arcsecond resolution which furthermore indicates that the central energy source is seen directly at near-infrared wavelengths. At 1.3 millimetre, we detected a cometary shaped source in the dust continuum radiation, 151"x55" in size, with a total mass of 180M_☉ as well as average hydrogen column and number densities of 4.5x10²²cm^–2 and 2.6x10⁵cm^–3, respectively. This dust cloud is also responsible for the strong spatial variation of the extinction across the nebula. We discuss the physical properties of the infrared point sources and conclude that some might be young, low-mass pre-main sequence stars. The main energy source of the nebula is an embedded intermediate-mass young stellar object. These observations are among the first infrared detections of a disk-like system associated with a bipolar nebula surrounding an intermediate-mass young stellar object.

Abstract Copyright: ∼

Journal keyword(s): stars: formation - stars: pre-main sequence - ISM: clouds - ISM: dust, extinction - radio continuum: ISM - stars: circumstellar matter

Nomenclature: Table 2: [BSH2000] NN (Nos 1-32).

CDS comments: p. 159 : IRAS 04302-2247 misprint for 04302+2247

Simbad objects: 45

View the references in ADS

Number of rows : 45

N	Identifier	Otype	ICRS (J2000) RA	ICRS (J2000) DEC	Mag U	Mag B	Mag V	Mag R	Mag I	Sp type	#ref 1850 - 2022
1	HD 1274	PM*	00 16 36.8572514064	-63 51 37.396566468		10.83	10.00	9.5	9.435	G5V	19
2	IRAS 04302+2247	Y*O	04 33 16.50096	+22 53 20.4000						~	155
3	HD 245185	Ae*	05 35 09.6034684104	+10 01 51.465413208	10.05	10.07	9.93			A0Vae	116
4	HD 52467	*	06 59 19.7101311960	-42 14 15.406720980		8.35	8.45			B5V	15
5	HD 62998	PM*	07 46 07.5839028000	-16 34 36.476658552		9.99	9.45			F6V	8
6	NAME VELA MOL RIDGE	MoC	08 53	-45.0						~	141
7	2MASS J08530035-4212474	NIR	08 53 00.3585791976	-42 12 47.465890956						~	1
8	2MASS J08530161-4212340	*	08 53 01.6069031832	-42 12 34.108320816						~	1
9	2MASS J08530231-4212241	NIR	08 53 02.3143190208	-42 12 24.192297216						~	2
10	2MASS J08530240-4212449	Y*?	08 53 02.3940363168	-42 12 45.026524152						~	3
11	ESO-HA 259	Em*	08 53 02.5113898080	-42 13 47.215755912			18.6			~	6
12	2MASS J08530396-4212444	NIR	08 53 03.97	-42 12 44.4						~	1
13	[BSH2000] 7	IR	08 53 04.0	-42 14 00						~	1
14	[BSH2000] 8	IR	08 53 04.3	-42 12 41						~	1
15	[BSH2000] 9	IR	08 53 05.3	-42 12 05						~	1
16	2MASS J08530591-4211398	NIR	08 53 05.91	-42 11 39.8						~	1
17	[BSH2000] 11	IR	08 53 06.6	-42 11 38						~	1
18	[BSH2000] 12	IR	08 53 06.9	-42 13 50						~	1
19	2MASS J08530707-4211279	*	08 53 07.0652720736	-42 11 27.905115084						~	1
20	[BSH2000] 14	IR	08 53 07.6	-42 12 58						~	1
21	[BSH2000] 15	IR	08 53 08.0	-42 12 53						~	1
22	BRAN 192E	RNe	08 53 08.0	-42 12 53						~	21
23	DCld 263.2+01.6	DNe	08 53 08	-42 12.8						~	4
24	[BSH2000] 16	IR	08 53 08.2	-42 13 05						~	1
25	[BSH2000] 17	IR	08 53 08.3	-42 12 58						~	1
26	[BSH2000] 18	IR	08 53 08.5	-42 12 50						~	1
27	[BSH2000] 19	IR	08 53 08.6	-42 12 35						~	1
28	[LLN92] IRS 26-2	IR	08 53 08.9	-42 13 29						~	2
29	[BSH2000] 21	IR	08 53 09.0	-42 13 33						~	1
30	[BSH2000] 20	IR	08 53 09.0	-42 13 04						~	1
31	[BSH2000] 22	IR	08 53 09.1	-42 13 46						~	1
32	[BSH2000] 23	IR	08 53 09.1	-42 13 35						~	1
33	[BSH2000] 25	Y*?	08 53 09.1	-42 13 07						~	3
34	[BSH2000] 24	IR	08 53 09.2	-42 12 25						~	1
35	2MASS J08530958-4211346	NIR	08 53 09.58	-42 11 34.7						~	1
36	[BSH2000] 27	IR	08 53 09.7	-42 13 34						~	1
37	WISEA J085309.91-421232.6	*	08 53 09.85	-42 12 32.9						~	3
38	[BSH2000] 29	IR	08 53 10.3	-42 13 26						~	1
39	2MASS J08531049-4211281	NIR	08 53 10.49	-42 11 28.1						~	1
40	[BSH2000] 31	IR	08 53 12.7	-42 13 33						~	1
41	[BSH2000] 32	IR	08 53 13.9	-42 12 21						~	1
42	[DB2002b] G263.29+1.64	DNe	08 53 38	-42 13.4						~	7
43	CD-42 11721	Be*	16 59 06.7629322176	-42 42 08.404228224	12.16	12.28	11.00			B0IVe	161
44	HD 218814	*	23 11 42.4960538928	-56 47 22.717273704		9.88	9.63			A6V	5
45	Ass Vel OB 4	*	~	~						~	8

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