2013ApJ...767..147G

Query : 2013ApJ...767..147G

2013ApJ...767..147G - Astrophys. J., 767, 147 (2013/April-3)

Spitzer-IRAC survey of molecular jets in Vela-D.

GIANNINI T., LORENZETTI D., DE LUCA M., STRAFELLA F., ELIA D., MAIOLO B., MARENGO M., MARUCCIA Y., MASSI F., NISINI B., OLMI L., SALAMA A. and SMITH H.A.

Abstract (from CDS):

We present a survey of H2 jets from young protostars in the Vela-D molecular cloud (VMR-D), based on Spitzer-IRAC data between 3.6 µm and 8.0 µm. Our search has led to the identification of 15 jets (two new discoveries) and about 70 well-aligned knots within 1.2 deg2. We compare the Infrared Array Camera (IRAC) maps with observations of the H21-0 S(1) line at 2.12 µm, with a Spitzer-MIPS map at 24 µm and 70 µm, and with a map of the dust continuum emission at 1.2 mm. From such a comparison, we find a tight association between molecular jets and dust peaks. The jet candidate exciting sources have been searched for in the published catalog of the young stellar objects of VMR-D. In particular, we searched for all the sources of Class II or (preferentially) earlier which are located close to the jet center and aligned with it. Furthermore, the association between jet and exciting source was validated by estimating the differential extinction between the jet opposite lobes. We are able to find a best-candidate exciting source in all but two jets, for which two alternative candidates are given. Four exciting sources are not (or very barely) observed at wavelengths shorter than 24 µm, suggesting that they are very young protostars. Three of them are also associated with the most compact jets (projected length ≲ 0.1 pc). The exciting source spectral energy distributions (SEDs) have been constructed and modeled by means of all the available photometric data between 1.2 µm and 1.2 mm. From SEDs fits, we derive the main source parameters, which indicate that most of them are low-mass protostars. A significant correlation is found between the projected jet length and the [24]-[70] color, which is consistent with an evolutionary scenario according to which shorter jets are associated with younger sources. A rough correlation is found between IRAC line cooling and exciting source bolometric luminosity, in agreement with the previous literature. The emerging trend suggests that mass loss and mass accretion are tightly related phenomena and that both decrease with time.

Abstract Copyright: ∼

Journal keyword(s): infrared: stars - ISM: clouds - ISM: individual: Vela Molecular Ridge - ISM: jets and outflows - stars: formation - surveys

VizieR on-line data: <Available at CDS (J/ApJ/767/147): table2.dat>

Status at CDS : All or part of tables of objects will not be ingested in SIMBAD.

Simbad objects: 67

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Number of rows : 67
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 NAME Taurus Complex SFR 04 41.0 +25 52           ~ 4971 0
2 NAME Ori A MoC 05 38 -07.1           ~ 3187 0
3 NAME Ori B MoC 05 41 43.0 -01 54 44           ~ 1498 0
4 NAME Orion Molecular Cloud MoC 05 56 -01.8           ~ 1227 1
5 IRAS 08211-4158 SFR 08 22 52.3 -42 07 57           ~ 26 0
6 NAME Vela-D Molecular Cloud MoC 08 39 -41.0           ~ 52 0
7 WISE J084534.45-435157.4 MIR 08 45 34.45 -43 51 57.4           ~ 1 0
8 [SEC2010] IRAC 18064 IR 08 45 34.51 -43 51 57.3           ~ 2 0
9 [MDE2007] MMS2 mm 08 45 34.80 -43 52 04.1           ~ 8 0
10 BLAST J084535-435156 cor 08 45 35.2 -43 51 57           ~ 3 0
11 IRAS 08438-4340 * 08 45 35.8 -43 51 02           G3III 27 1
12 [SEC2010] IRAC 38798 IR 08 46 25.26 -43 55 44.8           ~ 1 0
13 [LGV2002] IRS 17 A1 PoC 08 46 30.6 -43 53 12           ~ 4 0
14 [LGV2002] IRS 17 A2 PoC 08 46 31.0 -43 53 17           ~ 4 0
15 WISE J084631.35-435557.1 MIR 08 46 31.35 -43 55 57.1           ~ 1 0
16 2MASS J08463136-4355569 * 08 46 31.3593240672 -43 55 56.868570228           ~ 1 0
17 [SEC2010] IRAC 41256 IR 08 46 31.36 -43 55 56.9           ~ 1 0
18 [LGV2002] IRS 17 A3 PoC 08 46 31.4 -43 53 22           ~ 4 0
19 [LGV2002] IRS 17 B2 PoC 08 46 31.7 -43 53 47           ~ 4 0
20 [LGV2002] IRS 17 B1 PoC 08 46 31.8 -43 53 45           ~ 4 0
21 IRAS 08448-4343 cor 08 46 33.8 -43 54 33           ~ 73 1
22 [SEC2010] MIPS 298 IR 08 46 34.26 -43 21 11.2           ~ 1 0
23 [LGV2002] IRS 17 G1 PoC 08 46 35.3 -43 55 01           ~ 5 0
24 [LGV2002] IRS 17 G5 PoC 08 46 35.5 -43 55 11           ~ 4 0
25 BLAST J084648-435257 smm 08 46 48.6 -43 52 58           ~ 3 0
26 [SEC2010] IRAC 48370 IR 08 46 49.10 -43 52 54.3           ~ 1 0
27 [MDE2007] MMS5 mm 08 46 49.40 -43 53 08.2           ~ 6 0
28 [SEC2010] MIPS 392 IR 08 46 56.71 -43 52 52.9           ~ 1 0
29 BLAST J084742-434347 cor 08 47 42.3 -43 43 48           ~ 4 0
30 [MDE2007] umms11 mm 08 47 42.50 -43 43 39.1           ~ 5 0
31 MSX6C G263.7651-00.1572 Y*O 08 47 42.838 -43 43 48.29           ~ 4 0
32 IRAS 08464-4335 cor 08 48 15.5 -43 47 15           ~ 6 0
33 [MDE2007] umms16 mm 08 48 15.70 -43 47 07.8           ~ 5 0
34 [SEC2010] MIPS 657 IR 08 48 15.87 -43 47 15.6           ~ 1 0
35 [SEC2010] IRAC 95972 IR 08 48 20.53 -43 32 29.1           ~ 1 0
36 [MDE2007] umms19 mm 08 48 33.10 -43 30 43.9           ~ 4 0
37 BLAST J084833-433056 smm 08 48 33.9 -43 30 56           ~ 3 0
38 WISE J084833.95-433047.3 MIR 08 48 33.95 -43 30 47.3           ~ 1 0
39 2MASS J08483394-4330471 Y*O 08 48 33.95 -43 30 47.2           ~ 4 0
40 WISE J084844.38-431607.5 MIR 08 48 44.38 -43 16 07.5           ~ 1 0
41 [SEC2010] IRAC 108306 Y*O 08 48 44.381 -43 16 08.06           ~ 2 0
42 IRAS 08470-4321 cor 08 48 48.2 -43 32 25           ~ 47 0
43 WISE J084853.17-433055.0 MIR 08 48 53.17 -43 30 55.0           ~ 1 0
44 [SEC2010] IRAC 112469 Y*O 08 48 53.207 -43 30 55.21           ~ 2 0
45 [MDE2007] MMS16 mm 08 48 53.30 -43 31 00.1           ~ 6 0
46 [MDE2007] MMS17 mm 08 48 57.80 -43 38 28.0           ~ 6 0
47 [SEC2010] IRAC 114979 Y*O 08 48 58.704 -43 38 21.13           ~ 2 0
48 [SEC2010] MIPS 928 Y*O 08 49 12.88 -43 36 24.7           ~ 2 0
49 2MASS J08491298-4336257 NIR 08 49 12.984 -43 36 25.70           ~ 1 0
50 WISE J084913.19-433623.3 MIR 08 49 13.19 -43 36 23.3           ~ 1 0
51 [MDE2007] MMS21 mm 08 49 13.20 -43 36 28.1           ~ 6 0
52 IRAS 08474-4325 cor 08 49 13.272 -43 36 29.60           ~ 8 0
53 IRAS 08476-4306 cor 08 49 25.9 -43 17 10           ~ 28 0
54 WISE J084926.28-431711.1 MIR 08 49 26.28 -43 17 11.1           ~ 1 0
55 [SEC2010] IRAC 126339 IR 08 49 26.29 -43 17 10.8           ~ 1 0
56 MSX6C G263.6177+00.3652 NIR 08 49 26.36 -43 17 12.5           ~ 3 0
57 [MDE2007] MMS22 mm 08 49 27.40 -43 17 08.2           ~ 5 0
58 BLAST J084928-440426 smm 08 49 28.1 -44 04 27           ~ 3 0
59 [SEC2010] MIPS 998 IR 08 49 28.65 -44 04 29.2           ~ 1 0
60 WISE J084928.69-440429.2 MIR 08 49 28.69 -44 04 29.2           ~ 1 0
61 [MDE2007] MMS23 mm 08 49 29.50 -44 04 36.1           ~ 5 0
62 NAME VELA MOL RIDGE MoC 08 53 -45.0           ~ 178 0
63 NAME Vela C Cld 08 57 -43.2           ~ 193 0
64 NAME Vela B MoC 09 04 -48.0           ~ 30 0
65 NAME Vela A MoC 09 18 -48.0           ~ 31 0
66 NAME Serpens Cloud SFR 18 29 49 +01 14.8           ~ 1195 1
67 NAME Vela Field reg ~ ~           ~ 200 0

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