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

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

2000A&A...353..153B - Astronomy and Astrophysics, volume 353153-162 (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

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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 - 2026 		#notes
1 HD 1274 PM* 00 16 36.8572514064 -63 51 37.396566468   10.83 10.00 9.5 9.435 G5V 20 0
2 IRAS 04302+2247 Y*O 04 33 16.50096 +22 53 20.4000           ~ 215 0
3 HD 245185 Ae* 05 35 09.6034684104 +10 01 51.465413208 10.05 10.07 9.93     A0Vae 145 0
4 HD 52467 * 06 59 19.7101311960 -42 14 15.406720980   8.35 8.45     B5V 20 0
5 HD 62998 PM* 07 46 07.5839028000 -16 34 36.476658552   9.99 9.45     F6V 9 0
6 NAME VELA MOL RIDGE MoC 08 53 -45.0           ~ 178 0
7 2MASS J08530035-4212474 * 08 53 00.3585791976 -42 12 47.465890956           ~ 1 0
8 2MASS J08530161-4212340 * 08 53 01.6069031832 -42 12 34.108320816           ~ 1 0
9 2MASS J08530231-4212241 * 08 53 02.3143190208 -42 12 24.192297216           ~ 2 0
10 2MASS J08530240-4212449 Y*? 08 53 02.3940363168 -42 12 45.026524152           ~ 3 0
11 2MASS J08530251-4213471 Or* 08 53 02.5113898080 -42 13 47.215755912     18.6     ~ 13 0
12 2MASS J08530396-4212444 NIR 08 53 03.97 -42 12 44.4           ~ 1 0
13 [BSH2000] 7 IR 08 53 04.0 -42 14 00           ~ 1 0
14 [BSH2000] 8 IR 08 53 04.3 -42 12 41           ~ 1 0
15 [BSH2000] 9 IR 08 53 05.3 -42 12 05           ~ 1 0
16 2MASS J08530591-4211398 NIR 08 53 05.91 -42 11 39.8           ~ 1 0
17 [BSH2000] 11 IR 08 53 06.6 -42 11 38           ~ 1 0
18 [BSH2000] 12 IR 08 53 06.9 -42 13 50           ~ 1 0
19 2MASS J08530707-4211279 * 08 53 07.0652720736 -42 11 27.905115084           ~ 1 0
20 [BSH2000] 14 IR 08 53 07.6 -42 12 58           ~ 1 0
21 BRAN 192E RNe 08 53 08.0 -42 12 53           ~ 21 0
22 [BSH2000] 15 IR 08 53 08.0 -42 12 53           ~ 1 0
23 DCld 263.2+01.6 DNe 08 53 08 -42 12.8           ~ 4 0
24 [BSH2000] 16 IR 08 53 08.2 -42 13 05           ~ 1 0
25 [BSH2000] 17 IR 08 53 08.3 -42 12 58           ~ 1 0
26 [BSH2000] 18 IR 08 53 08.5 -42 12 50           ~ 1 0
27 [BSH2000] 19 IR 08 53 08.6 -42 12 35           ~ 1 0
28 [LLN92] IRS 26-2 IR 08 53 08.9 -42 13 29           ~ 2 0
29 [BSH2000] 21 IR 08 53 09.0 -42 13 33           ~ 1 0
30 [BSH2000] 20 IR 08 53 09.0 -42 13 04           ~ 1 0
31 [BSH2000] 22 IR 08 53 09.1 -42 13 46           ~ 1 0
32 [BSH2000] 23 IR 08 53 09.1 -42 13 35           ~ 1 0
33 [BSH2000] 25 Y*? 08 53 09.1 -42 13 07           ~ 3 0
34 [BSH2000] 24 IR 08 53 09.2 -42 12 25           ~ 1 0
35 2MASS J08530958-4211346 NIR 08 53 09.58 -42 11 34.7           ~ 1 0
36 [BSH2000] 27 IR 08 53 09.7 -42 13 34           ~ 1 0
37 WISEA J085309.91-421232.6 * 08 53 09.85 -42 12 32.9           ~ 3 0
38 [BSH2000] 29 IR 08 53 10.3 -42 13 26           ~ 1 0
39 2MASS J08531049-4211281 NIR 08 53 10.49 -42 11 28.1           ~ 1 0
40 [BSH2000] 31 * 08 53 12.7 -42 13 33           ~ 2 0
41 [BSH2000] 32 IR 08 53 13.9 -42 12 21           ~ 1 0
42 [DB2002b] G263.29+1.64 DNe 08 53 38 -42 13.4           ~ 7 0
43 CD-42 11721 Be* 16 59 06.7629322176 -42 42 08.404228224 12.16 12.28 11.00     B0IVe 179 0
44 HD 218814 * 23 11 42.4960538928 -56 47 22.717273704   9.88 9.63     A6V 7 0
45 Ass Vel OB 4 * ~ ~           ~ 8 0

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