2001AJ....121.1556B

Query : 2001AJ....121.1556B

2001AJ....121.1556B - Astron. J., 121, 1556-1568 (2001/March-0)

Radio spectral indices of the powering sources of outflows.

BELTRAN M.T., ESTALELLA R., ANGLADA G., RODRIGUEZ L.F. and TORRELLES J.M.

Abstract (from CDS):

Eight regions containing molecular or HH outflows (Mon R2E, S287, L1654, L483, PV Cephei, L1203, L1251A, and CB 247) have been observed with the VLA at 6 cm, and a total of 55 sources have been detected above a 5 σ level. By combining our observations at 6 cm with previous data obtained at 3.6 cm, we estimate the spectral indices of the sources in the fields. For 32 of the sources we discriminate the sign of the spectral index and thus, we obtain information about the nature of the emission. For seven outflows (Mon R2E, S287-B, L1654, L483, PV Cephei, L1203, and L1251A) we found at least a central source with an spectral index consistent with thermal free-free emission from thermal radio jets. Multiple sources, separated ∼10", are found near the center of the Mon R2E, S287-B, L1654, and L1251A outflows. In the case of S287-B we found two sources that are valid candidates to drive the S287-B molecular outflow and could be related to the outflow excitation. Under the assumption that the observed emission arises from thermal radio jets, we discuss the mechanism responsible for the ionization and the constraints that introduces on their physical parameters, and we estimate that the flow of ionized material has to originate at a few AU from the exciting star. Most of the remaining, noncentral, sources are characterized by negative spectral indices (α←0.1) and are probably nonthermal background objects unrelated to the studied star-forming regions.

Abstract Copyright: ∼

Journal keyword(s): ISM: Jets and Outflows - Radio Continuum - Stars: Formation

Nomenclature: Table 2: [BEA2001] Mon R2E NN (Nos 1-13), [BEA2001] S287 N (Nos 1-9), [BEA2001] L1654 N (Nos 1-8), [BEA2001] L483 N (Nos 1-6), [BEA2001] L1203 N (Nos 1-5), [BEA2001] PV Cep N (Nos 1-7), [BEA2001] L1251A N (Nos 1-9), [BEA2001] CB247 N (Nos 1-7).

Simbad objects: 117

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Number of rows : 117
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 LDN 1448NA smm 03 25 36.49 +30 45 22.2           ~ 193 1
2 IRAS 03225+3034 IR 03 25 36.49 +30 45 22.2           ~ 165 1
3 SSTc2d J032536.4+304522 Y*O 03 25 36.49 +30 45 22.2           ~ 208 1
4 IRAS F03226+3033 Y*O 03 25 38.83 +30 44 06.2           ~ 371 0
5 [SDA2014] West4 Y*O 03 25 38.83 +30 44 06.2           ~ 266 1
6 LDN 1489 DNe 04 04 47.5 +26 19 42           ~ 238 0
7 V* T Tau TT* 04 21 59.4319873992 +19 32 06.432393336   11.22 10.12 9.80   K0IV/Ve 1456 1
8 LDN 1551 DNe 04 31 30.0 +18 12 30           ~ 823 1
9 V* HL Tau Or* 04 31 38.5107609312 +18 13 57.859747968   15.89 14.49 14.39   K5 1546 0
10 IRAS 04287+1807 mul 04 31 38.8 +18 13 57           ~ 797 0
11 HH 243 HH 05 32 27.83 +12 53 14.6   17.0       ~ 119 0
12 NAME LDN 1641 North HII 05 36 17.6 -06 22 10           ~ 252 0
13 Haro 4-255 Or* 05 39 22.3402033872 -07 26 44.480192532   15 15.830   12.969 K0 111 0
14 NAME HH 25MMS Y*O 05 46 07.8 -00 13 41           ~ 59 0
15 IRAS 05435-0011 Y*O 05 46 08.45544 -00 10 02.9568           ~ 91 0
16 HGBS J054608.3-001044 Y*O 05 46 08.8 -00 10 47           ~ 92 0
17 [PGS81] IRS 1 Y*O 05 47 04.78 +00 21 42.8           ~ 88 0
18 LDN 1617 DNe 05 51 46 +02 48.5           ~ 62 0
19 NAME Mon R2 IRS 2 * 06 07 45.83 -06 22 53.5           B0 122 0
20 NAME Mon R2 IRS 1 cor 06 07 46.20 -06 23 09.5           B0 65 0
21 2CXO J060748.0-062230 * 06 07 48.03 -06 22 30.8           ~ 11 0
22 [BEA2001] Mon R2E 1 Rad 06 12 22.42 -06 10 41.8           ~ 1 0
23 [BEA2001] Mon R2E 2 Rad 06 12 32.60 -06 11 29.5           ~ 1 0
24 [BEA2001] Mon R2E 3 Rad 06 12 46.57 -06 13 17.4           ~ 1 0
25 [BEA2001] Mon R2E 4 Rad 06 12 48.26 -06 13 25.3           ~ 2 0
26 [PCC93] 99 Mas 06 12 49.5 -06 13 46           ~ 2 0
27 V* V697 Mon Or* 06 12 50.3558180664 -06 13 11.486850240   15.60 14.62 14.48   ~ 36 2
28 HH 271 HH 06 12 50.376 -06 13 00.76           ~ 4 1
29 [BEA2001] Mon R2E 6 Rad 06 12 53.08 -06 16 05.4           ~ 1 0
30 NVSS J061253-061948 Rad 06 12 53.60 -06 19 48.0           ~ 2 1
31 [BEA2001] Mon R2E 8 Rad 06 12 54.02 -06 10 08.2           ~ 1 0
32 [BEA2001] Mon R2E 9 Rad 06 12 56.65 -06 10 39.8           ~ 1 0
33 [BEA2001] Mon R2E 10 Rad 06 13 01.07 -06 12 59.5           ~ 1 0
34 [BEA2001] Mon R2E 11 Rad 06 13 03.43 -06 10 02.9           ~ 1 0
35 [BEA2001] Mon R2E 12 Rad 06 13 08.15 -06 13 16.5           ~ 1 0
36 [BEA2001] Mon R2E 13 Rad 06 13 18.10 -06 16 24.0           ~ 1 0
37 NAME Mon OB1 G PoC 06 41 12 +09 55.6           ~ 108 0
38 LDN 1654 DNe 06 58.6 -07 44           ~ 27 1
39 [BEA2001] S287 1 Rad 06 59 20.98 -04 46 30.7           ~ 1 0
40 [BEA2001] S287 2 Rad 06 59 22.91 -04 39 51.6           ~ 1 0
41 LBN 1012 HII 06 59 29 -04 49.2           ~ 50 0
42 SH 2-287 B ISM 06 59 34 -04 46.0           ~ 9 0
43 IRAS 06571-0441 HII 06 59 34.8 -04 46 00           ~ 13 0
44 [BEA2001] S287 4 Rad 06 59 35.00 -04 46 01.7           ~ 1 0
45 [BEA2001] S287 3 Rad 06 59 35.05 -04 39 34.8           ~ 1 0
46 [BEA2001] S287 5 Rad 06 59 35.66 -04 46 02.5           ~ 1 0
47 HH 227 HH 06 59 36.282 -04 46 10.48           ~ 2 0
48 [BEA2001] S287 6 Rad 06 59 36.41 -04 42 52.8           ~ 1 0
49 GLMP 169 HII 06 59 36.9378902040 -04 40 30.508888548           ~ 8 0
50 [BEA2001] L1654 1 Rad 06 59 37.41 -07 46 14.3           ~ 1 0
51 IRAS 06571-0438 IR 06 59 37.5 -04 42 56           ~ 2 0
52 [BEA2001] S287 7 Rad 06 59 40.12 -04 46 04.8           ~ 1 0
53 [BEA2001] L1654 2 Rad 06 59 41.03 -07 46 35.6           ~ 1 0
54 HBC 547 Or* 06 59 41.5950952698 -07 46 28.253705745           B2.5e 39 0
55 [BEA2001] S287 8 Rad 06 59 42.26 -04 46 14.9           ~ 1 0
56 [BEA2001] S287 9 Rad 06 59 50.40 -04 48 12.6           ~ 1 0
57 [BEA2001] L1654 4 Rad 06 59 53.10 -07 44 44.8           ~ 1 0
58 [BEA2001] L1654 5 Rad 07 00 00.18 -07 42 49.5           ~ 1 0
59 [BEA2001] L1654 6 Rad 07 00 01.49 -07 41 31.7           ~ 1 0
60 [BEA2001] L1654 7 Rad 07 00 09.08 -07 45 59.6           ~ 1 0
61 [BEA2001] L1654 8 Rad 07 00 11.02 -07 46 13.0           ~ 1 0
62 NAME HH 46-47 HH 08 25 43.6 -51 00 36           ~ 216 2
63 2MASS J08254384-5100326 Y*O 08 25 43.85 -51 00 32.7           ~ 327 1
64 HH 47 HH 08 25 44.30 -51 00 26.2           ~ 247 0
65 NAME VLA 1623-243 Y*O 16 26 26.42 -24 24 30.0           ~ 429 0
66 [SSG2006] MMS002 smm 16 26 26.50 -24 24 30.9           ~ 241 0
67 IRAS 16293-2422 cor 16 32 22.56 -24 28 31.8           ~ 1357 1
68 [BEA2001] L483 1 Rad 18 17 26.58 -04 37 57.8           ~ 1 0
69 [XT92] 4 Mas 18 17 29.6 -04 39 04           ~ 6 0
70 IRAS 18148-0440 Y*O 18 17 29.94 -04 39 39.3           ~ 97 0
71 [BEA2001] L483 3 Rad 18 17 31.22 -04 39 14.2           ~ 1 0
72 NVSS J181734-044243 Rad 18 17 34.06 -04 42 43.0           ~ 2 0
73 LDN 483 DNe 18 17 35 -04 39.8           ~ 359 0
74 [BEA2001] L483 5 Rad 18 17 42.49 -04 40 32.8           ~ 1 0
75 NVSS J181752-044056 Rad 18 17 52.55 -04 40 56.1           ~ 2 0
76 LDN 723 DNe 19 18 12 +19 13.6           ~ 155 0
77 EM* AS 353 Or* 19 20 30.9918166680 +11 01 54.605482968   13.22 12.21     K5 197 1
78 LDN 663 DNe 19 36 55 +07 34.4           ~ 698 0
79 [BEA2001] PV Cep 3 Rad 20 44 53.17 +68 01 07.1           ~ 1 0
80 [BEA2001] PV Cep 4 Rad 20 45 33.19 +68 04 01.4           ~ 1 0
81 [BEA2001] PV Cep 5 Rad 20 45 37.76 +68 00 37.6           ~ 1 0
82 [BEA2001] PV Cep 6 Rad 20 45 44.78 +67 56 54.3           ~ 1 0
83 V* PV Cep Or* 20 45 53.9540390184 +67 57 38.679941304   19.27 17.46 15.98 14.60 A5 282 1
84 [BEA2001] PV Cep 2 Rad 20 46 08.31 +68 00 17.0           ~ 1 0
85 [BEA2001] PV Cep 7 Rad 20 46 09.57 +67 59 44.3           ~ 1 0
86 IRAS 20582+7724 Y*O 20 57 12.9250225656 +77 35 43.656301932           ~ 119 0
87 LDN 1228 DNe 20 57 13 +77 35.8           ~ 131 0
88 [BEA2001] L1203 1 Rad 22 27 48.89 +63 00 07.5           ~ 1 0
89 [BEA2001] L1203 2 Rad 22 27 51.09 +63 00 11.8           ~ 1 0
90 LDN 1203 DNe 22 28 29.3 +62 59 44           ~ 16 0
91 IRAS 22267+6244 HII 22 28 29.3 +62 59 44           ~ 30 0
92 [BEA2001] L1203 3 Rad 22 28 29.62 +63 00 01.3           ~ 1 0
93 [BEA2001] L1203 4 Rad 22 28 41.01 +62 58 32.0           ~ 1 0
94 [BEA2001] L1203 5 Rad 22 29 21.37 +62 55 11.3           ~ 1 0
95 LDN 1251A DNe 22 30 31.8 +75 14 17           ~ 76 2
96 [BEA2001] L1251A 1 Rad 22 34 26.60 +75 17 03.3           ~ 1 0
97 [BEA2001] L1251A 2 Rad 22 34 29.74 +75 17 47.5           ~ 1 0
98 [BEA2001] L1251A 3 Rad 22 35 01.58 +75 14 31.9           ~ 1 0
99 [BEA2001] L1251A 4 Rad 22 35 18.94 +75 23 29.9           ~ 1 0
100 [BEA2001] L1251A 5 Rad 22 35 20.70 +75 19 43.9           ~ 1 0
101 2MASS J22352345+7517076 Y*? 22 35 23.46 +75 17 07.6           ~ 15 1
102 HH 149 HH 22 35 24.323 +75 17 05.67           ~ 9 0
103 [RD95] E IR 22 35 24.50 +75 17 08.5           ~ 6 0
104 2MASS J22352497+7517113 Y*O 22 35 24.9481883664 +75 17 11.524587288     20.94 19.12 16.09 ~ 13 0
105 [RD95] C IR 22 35 25.0 +75 17 02           ~ 7 0
106 [BEA2001] L1251A 8 Rad 22 36 23.77 +75 20 09.3           ~ 1 0
107 [BEA2001] L1251A 9 Rad 22 36 27.22 +75 16 42.8           ~ 1 0
108 LDN 1251B DNe 22 38 46.79 +75 11 32.6           ~ 51 1
109 LDN 1262 MoC 23 25 47 +74 17.6           ~ 136 0
110 [BEA2001] CB247 1 Rad 23 57 10.37 +64 42 35.1           ~ 1 0
111 [BEA2001] CB247 2 Rad 23 57 11.91 +64 42 26.2           ~ 1 0
112 [BEA2001] CB247 3 Rad 23 57 17.66 +64 42 41.8           ~ 1 0
113 LDN 1263 DNe 23 57 25 +64 49.4           ~ 18 0
114 [BEA2001] CB247 4 Rad 23 57 28.59 +64 48 20.2           ~ 1 0
115 [BEA2001] CB247 5 Rad 23 57 30.19 +64 48 22.4           ~ 1 0
116 [BEA2001] CB247 6 Rad 23 57 30.71 +64 46 10.1           ~ 1 0
117 [BEA2001] CB247 7 Rad 23 57 54.60 +64 44 54.9           ~ 1 0

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