2007ApJ...671..470G

Query : 2007ApJ...671..470G

2007ApJ...671..470G - Astrophys. J., 671, 470-482 (2007/December-2)

Spitzer MIPS survey of the young stellar content in the Vela Molecular Ridge-D.

GIANNINI T., LORENZETTI D., DE LUCA M., NISINI B., MARENGO M., ALLEN L., SMITH H.A., FAZIO G., MASSI F., ELIA D. and STRAFELLA F.

Abstract (from CDS):

A new, unbiased Spitzer MIPS imaging survey (∼1.8 deg2) of the young stellar content of the Vela Molecular Ridge-D (VMR-D) is presented. The survey is complete down to 5 and 250 mJy at 24 and 70 µm, respectively. A total of 849 sources are detected at 24 µm, and 52 of them also have a 70 µm counterpart. The VMR-D region is one that we have already partially mapped in dust and gas millimeter emission, and we discuss the correlation between the Spitzer compact sources and the millimeter contours. About half of the 24 µm sources are located inside the region delimited by the ^ 12^CO(1-0) contours, corresponding to only one-third of the full area mapped with MIPS. Therefore, the 24 µm source density increases by about 100% moving from outside to inside the CO contours. For the 70 µm sources, the corresponding density increase is a factor of 4. About 400 sources of these have a 2MASS counterpart, and we have used this to construct a Ks versus Ks-[24] diagram and to identify the protostellar population inside the cloud. We find an excess of Class I sources in VMR-D in comparison with other star-forming regions. This result could be reasonably biased by the sensitivity limits at 2.2 and 24 µm or, alternatively, may reflect a very short lifetime (≲106 yr) for the protostellar content in this molecular cloud. The MIPS images have identified embedded cool objects in most of the previously identified starless cores in the region; in addition, there are six very young, possibly Class 0 objects identified. Finally, we report finding the driving sources for a set of five out of six very compact protostellar jets that had been previously discovered in near-IR images of VMR-D.

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/671/470): table2.dat table3.dat>

Nomenclature: Table 2: SSTVMRD JHHMMSS.s+DDMMSS.s N=849. Table 3: [GLD2007] NN (Nos 1-67).

Status at CDS : All or part of tables of objects could be ingested in SIMBAD with priority 2.

Simbad objects: 80

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Number of rows : 80
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 NGC 1333 OpC 03 29 09.2 +31 20 59           ~ 1575 1
2 NAME Perseus Cloud SFR 03 35.0 +31 13           ~ 1553 0
3 IC 348 OpC 03 44 31.1 +32 10 02           ~ 1476 1
4 LDN 1630 DNe 05 45.5 -00 59           ~ 392 0
5 NAME Vela SNR 08 34.0 -45 50           ~ 1331 2
6 NAME Vela-D Molecular Cloud MoC 08 39 -41.0           ~ 52 0
7 IRAS 08437-4323 FIR 08 45 29.8 -43 34 51           ~ 2 0
8 [MDE2007] MMS1 mm 08 45 33.40 -43 50 20.1           ~ 6 0
9 [MDE2007] MMS2 mm 08 45 34.80 -43 52 04.1           ~ 8 0
10 [MDE2007] MMS3 mm 08 45 40.10 -43 51 32.3           ~ 5 0
11 IRAS 08441-4357 FIR 08 45 56.7 -44 08 22           ~ 2 0
12 [MDE2007] umms1 mm 08 46 25.80 -43 42 26.6           ~ 4 0
13 [MDE2007] MMS4 mm 08 46 34.60 -43 54 36.0           ~ 7 0
14 [MDE2007] umms3 mm 08 46 37.20 -43 19 55.6           ~ 3 0
15 [MDE2007] umms4 mm 08 46 49.00 -43 20 27.1           ~ 3 0
16 [MDE2007] MMS5 mm 08 46 49.40 -43 53 08.2           ~ 6 0
17 [MDE2007] umms6 mm 08 46 56.60 -43 53 07.1           ~ 3 0
18 [MDE2007] umms7 mm 08 47 28.50 -43 27 00.4           ~ 3 0
19 IRAS 08457-4229 FIR 08 47 34.2 -42 40 58           ~ 2 0
20 [MDE2007] umms10 mm 08 47 41.00 -43 26 28.3           ~ 4 0
21 [MDE2007] umms11 mm 08 47 42.50 -43 43 39.1           ~ 5 0
22 IRAS 08459-4338 IR 08 47 45.3 -43 50 01           ~ 3 0
23 [MDE2007] umms12 mm 08 47 46.80 -43 25 55.4           ~ 3 0
24 IRAS 08460-4223 IR 08 47 50.4 -42 35 03           ~ 3 0
25 IRAS 08462-4400 MIR 08 47 55.86144 -44 11 14.9856           ~ 2 0
26 [MDE2007] umms14 mm 08 47 57.90 -43 38 59.6           ~ 3 0
27 [MDE2007] MMS7 mm 08 47 58.80 -43 39 47.9           ~ 4 0
28 IRAS 08462-4235 FIR 08 48 04.5 -42 46 26           ~ 2 0
29 IRAS 08463-4343 cor 08 48 05.4 -43 54 15           ~ 6 0
30 [MDE2007] umms16 mm 08 48 15.70 -43 47 07.8           ~ 5 0
31 IRAS 08465-4230 IR 08 48 20.6 -42 41 29           ~ 2 0
32 [MDE2007] umms18 mm 08 48 26.70 -43 31 39.7           ~ 3 0
33 [MDE2007] umms19 mm 08 48 33.10 -43 30 43.9           ~ 4 0
34 [MDE2007] umms20 mm 08 48 35.50 -43 30 59.8           ~ 3 0
35 [MDE2007] umms22 mm 08 48 36.60 -43 16 51.2           ~ 4 0
36 IRAS 08468-4330 IR 08 48 39.6 -43 41 18           ~ 3 0
37 [MDE2007] MMS10 mm 08 48 43.00 -43 37 08.0           ~ 3 0
38 [MDE2007] MMS9 mm 08 48 43.00 -43 31 48.0           ~ 5 0
39 [MDE2007] MMS11 mm 08 48 45.10 -43 37 40.1           ~ 3 0
40 [MDE2007] MMS12 mm 08 48 49.00 -43 32 28.0           ~ 6 0
41 [MDE2007] MMS14 mm 08 48 51.10 -43 31 08.1           ~ 5 0
42 [MDE2007] MMS16 mm 08 48 53.30 -43 31 00.1           ~ 6 0
43 IRAS 08471-4228 IR 08 48 54.4 -42 39 12           ~ 2 0
44 [MDE2007] MMS17 mm 08 48 57.80 -43 38 28.0           ~ 6 0
45 [MDE2007] MMS18 mm 08 49 03.60 -43 38 12.1           ~ 4 0
46 [MDE2007] MMS19 mm 08 49 08.90 -43 35 48.1           ~ 4 0
47 IRAS 08473-4235 Y*? 08 49 08.9672167944 -42 46 27.311393316       15.98 14.08 ~ 4 0
48 [MDE2007] MMS21 mm 08 49 13.20 -43 36 28.1           ~ 6 0
49 IRAS 08475-4255 IR 08 49 17.7 -43 06 30           ~ 2 0
50 IRAS 08475-4311 IR 08 49 18.1 -43 23 03           ~ 2 0
51 [MDE2007] umms23 mm 08 49 24.20 -43 13 13.4           ~ 3 0
52 IRAS 08476-4306 cor 08 49 25.9 -43 17 10           ~ 28 0
53 [MGL99] IRS 20 98 * 08 49 26.23 -43 17 11.0           ~ 3 0
54 [MDE2007] umms24 mm 08 49 27.10 -43 12 33.5           ~ 3 0
55 [MDE2007] MMS22 mm 08 49 27.40 -43 17 08.2           ~ 5 0
56 [MDE2007] MMS23 mm 08 49 29.50 -44 04 36.1           ~ 5 0
57 IRAS 08477-4329 FIR 08 49 30.6 -43 41 11           ~ 2 0
58 IRAS 08478-4303 * 08 49 32.5419940440 -43 14 45.837357324   15.424 14.258 13.886   ~ 3 0
59 [MDE2007] MMS26 mm 08 49 33.80 -44 10 59.9           ~ 5 0
60 IRAS 08478-4403 IR 08 49 34.1 -44 14 54           ~ 3 0
61 [MDE2007] MMS27 mm 08 49 34.60 -44 11 56.0           ~ 4 0
62 IRAS 08478-4353 FIR 08 49 38.6 -44 05 08           ~ 2 0
63 IRAS 08479-4311 Y*O 08 49 52.0773457272 -43 22 43.481769564           ~ 5 0
64 [MDE2007] umms26 mm 08 49 59.00 -43 22 55.6           ~ 4 0
65 [MDE2007] MMS28 mm 08 50 09.40 -43 16 27.8           ~ 4 0
66 [MDE2007] MMS29 mm 08 50 12.20 -43 17 16.1           ~ 4 0
67 HD 75789 * 08 50 30.6493981944 -43 18 44.695309680   9.10 7.52     K4III 16 0
68 IRAS 08487-4250 FIR 08 50 30.7 -43 01 51           ~ 2 0
69 IRAS 08489-4241 Cld 08 50 44.2 -42 52 41           ~ 2 0
70 IRAS 08490-4319 FIR 08 50 47.3 -43 30 52           ~ 2 0
71 IRAS 08491-4310 IR 08 50 58.5 -43 21 34           ~ 2 0
72 IRAS 08491-4257 FIR 08 50 58.9 -43 08 32           ~ 2 0
73 IRAS 08493-4331 FIR 08 51 08.7 -43 43 16           ~ 2 0
74 IRAS 08495-4306 FIR 08 51 19.1 -43 18 12           ~ 2 0
75 NAME VELA MOL RIDGE MoC 08 53 -45.0           ~ 178 0
76 NAME Cha 1 MoC 11 06 48 -77 18.0           ~ 1266 1
77 ELAIS N1 reg 16 10 01 +54 30.6           ~ 489 0
78 NAME Ophiuchus Molecular Cloud SFR 16 28 06 -24 32.5           ~ 3969 1
79 NAME Serpens Cloud SFR 18 29 49 +01 14.8           ~ 1195 1
80 NGC 7129 OpC 21 43 01.1 +66 07 04     11.5     ~ 271 0

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