2003ApJ...592L..79W

Query : 2003ApJ...592L..79W

2003ApJ...592L..79W - Astrophys. J., 592, L79-L82 (2003/August-1)

Indications of inflow motions in regions forming massive stars.

WU J. and EVANS II N.J.

Abstract (from CDS):

Observational evidence of inflowing motions in massive star-forming regions has been extremely rare. We have made a spectroscopic survey of a sample of 28 massive star-forming cores associated with water masers. An optically thick line of HCN (3-2) was used in combination with optically thin lines [H13CN (3-2) or C34S (5-4), (3-2), and (2-1)] to identify ``blue'' line profiles that can indicate inflow. Comparing intensities for 18 double-peaked line profiles yields 11 blue and three red profiles that are statistically significant. In the full sample of 28 sources, 12 show blue profiles, and six show red profiles that are statistically significant based on the velocity offsets of lines that are optically thick from those that are optically thin. These results indicate that HCN (3-2) emission may trace inflow in regions forming high-mass stars.

Abstract Copyright: ∼

Journal keyword(s): ISM: Molecules - Stars: Formation

Simbad objects: 35

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Number of rows : 35
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 GM 1-33 HH 00 36 47.5 +63 29 02           ~ 124 0
2 GAL 123.07-06.31 reg 00 52 25.2 +56 33 53           ~ 14 0
3 NAME W 3 OH HII 02 27 04.1 +61 52 22           ~ 1064 2
4 SH 2-231 Y*O 05 39 13.2 +35 45 48           ~ 135 0
5 SH 2-235 B HII 05 40 52.366 +35 41 29.43   17       ~ 180 1
6 SH 2-235 HII 05 41.1 +35 50           ~ 236 0
7 SH 2-252 A HII 06 08 33 +20 39.3           ~ 75 0
8 SH 2-257 HII 06 12 43.57 +17 59 33.1           ~ 135 1
9 MMB G192.600-00.048 Y*O 06 12 54.0100 +17 59 23.200           ~ 430 0
10 IC 2162 HII 06 13 04.1 +17 58 44           ~ 372 2
11 RAFGL 989 Y*O 06 41 10.1587451112 +09 29 33.635220144   17.4 16.8 18.26 17.28 B2 271 0
12 RCW 142 HII 17 50 15.3 -28 54 03           ~ 64 0
13 RAFGL 2046 HII 18 00 32.1 -24 04 03           ~ 380 0
14 RAFGL 2059 Y*O 18 04 53.1586569336 -24 26 41.642012796 19.905 21.910 18.914   14.078 ~ 146 0
15 GAL 009.62+00.19 HII 18 06 13.9 -20 31 44           ~ 226 0
16 W 31c HII 18 10 29.1 -19 56 05           ~ 357 0
17 GAL 019.61-00.23 HII 18 27 38.0 -11 56 42           ~ 162 0
18 GAL 023.95+00.16 HII 18 34 23.8 -07 54 53           ~ 15 0
19 W 43s Rad 18 47 41.68 -02 00 24.3           ~ 30 0
20 SNR G034.6-00.5 SNR 18 56 10.650 +01 13 21.30           ~ 1034 2
21 IRAS 18538+0216 HII 18 56 22.52 +02 20 27.0           ~ 35 0
22 W 49 SFR 19 10 20 +09 07.7           ~ 601 1
23 OH 048.61+00.02 Mas 19 20 31.1760 +13 55 25.210           ~ 19 0
24 W 51 SNR 19 23 50 +14 06.0           ~ 1352 1
25 LDN 663 DNe 19 36 55 +07 34.4           ~ 698 0
26 MSX6C G059.7831+00.0648 Y*O 19 43 11.2464 +23 44 03.270           ~ 159 0
27 IRAS 19410+2336 SFR 19 43 11.5 +23 44 06           ~ 160 0
28 SH 2-88 B HII 19 46 48.2 +25 12 21           ~ 159 2
29 Onsala 2S HII 20 21 41.4 +37 25 44           ~ 41 0
30 NAME Cyg X FIR 33 Y*O 20 38 35.9 +42 37 22           B1.5 423 1
31 [W71c] DR 21S HII 20 39 00.52 +42 19 40.1           ~ 8 0
32 W 75(OH) Rad 20 39 01.01 +42 22 49.9           ~ 39 0
33 NAME Cepheus A SFR 22 56 17.9 +62 01 49           ~ 760 2
34 NGC 7538 OpC 23 13 37 +61 30.0           ~ 920 1
35 LBN 111.14-00.72 HII 23 16 03.94 +60 02 00.9           ~ 102 2

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