2021RAA....21...14Y

Query : 2021RAA....21...14Y

2021RAA....21...14Y - Research in Astron. and astroph., 21, 14-14 (2021/January-0)

Infall in massive clumps harboring bright infrared sources.

YUE Y.-H., QIN S.-L., LIU T., TANG M.-Y., WU Y.-F., WANG K. and ZHANG C.

Abstract (from CDS):

Thirty massive clumps associated with bright infrared sources were observed to detect the infall signatures and characterize infall properties in the envelope of the massive clumps by APEX telescope in CO(4-3) and C17O(3-2) lines. Eighteen objects exhibit a "blue profile" in the CO(4-3) line with virial parameters less than 2, suggesting that global collapse is taking place in these massive clumps. The CO(4-3) lines were fitted via the two-layer model in order to obtain infall velocities and mass infall rates. Derived mass infall rates range from 10–3 to 10–1M☉ yr–1. A positive relationship between clump mass and infall rate appears to indicate that gravity plays a dominant role in the collapsing process. Higher luminosity clumps have a larger mass infall rate, implying that those clumps with higher mass infall rates possess a higher star formation rate.

Abstract Copyright: © 2021 National Astronomical Observatories

Journal keyword(s): stars: formation - ISM: clouds - ISM: molecules

Simbad objects: 31

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Number of rows : 31
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 IRAS 09018-4816 HII 09 03 32.8 -48 28 40           ~ 28 0
2 2MASS J10383046-5819007 Y*? 10 38 30.46 -58 19 00.8           ~ 25 0
3 GAL 305.20+00.21 HII 13 11 11.7 -62 34 44           ~ 38 0
4 IRAS 13134-6242 mul 13 16 42.9 -62 58 45           ~ 39 0
5 MSX6C G307.6138-00.2559 HII 13 32 31.104 -62 45 13.68           ~ 20 0
6 [BNM96] 316.139-0.503 HII 14 42 01.8038893992 -60 30 09.662138316           ~ 29 0
7 IRAS 14453-5912 HII 14 49 07.1 -59 24 52           ~ 20 0
8 IRAS 14498-5856 HII 14 53 42.324 -59 08 57.44           ~ 38 0
9 IRAS 15520-5234 HII 15 55 48.336 -52 43 10.20           ~ 59 1
10 IRAS 15596-5301 HII 16 03 31.800 -53 09 24.48           ~ 33 0
11 IRAS 16060-5146 HII 16 09 52.776 -51 54 52.20           ~ 44 0
12 IRAS 16071-5142 HII 16 11 00 -51 50.3           ~ 40 0
13 GAL 331.28-00.19 HII 16 11 26.6 -51 41 57           ~ 56 0
14 IRAS 16272-4837 HII 16 30 59.2 -48 43 48           ~ 42 0
15 IRAS 16344-4658 HII 16 38 10.7 -47 04 54           ~ 20 1
16 IRAS 16348-4654 HII 16 38 30.901 -47 00 46.20           ~ 17 1
17 IRAS 16351-4722 HII 16 38 52.032 -47 28 11.28           ~ 37 0
18 IRAS 16385-4619 HII 16 42 14.3 -46 25 28           ~ 15 1
19 IRAS 16547-4247 Y*O 16 58 17.208 -42 52 08.16           ~ 187 0
20 IRAS 17143-3700 HII 17 17 45.6 -37 03 28           ~ 20 0
21 GAL 350.10+00.09 HII 17 19 26.1 -37 10 54           ~ 43 0
22 IRAS 17204-3636 HII 17 23 49.8 -36 38 47           ~ 20 0
23 GAL 351.58-00.35 HII 17 25 25.2 -36 12 46           ~ 40 0
24 GAL 353.41-00.36 HII 17 30 26.2 -34 41 45           ~ 54 1
25 NAME Sgr B2 Main Rad 17 47 20.5 -28 23 06           ~ 436 1
26 GAL 010.46+00.03 HII 18 08 35.5 -19 52 09           ~ 59 0
27 GAL 012.89+00.49 HII 18 11 51.3 -17 31 29           ~ 217 0
28 GAL 013.875+00.28 HII 18 14 35.2 -16 45 21           ~ 99 0
29 EGO G016.59-0.05 HII 18 21 07.9 -14 31 53           ~ 129 0
30 RAFGL 2271 SFR 18 53 18.54 +01 14 57.9           ~ 537 0
31 IRAS 19078+0901 HII 19 10 15.6 +09 06 05           ~ 44 0

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