2005A&A...433..565D

Query : 2005A&A...433..565D

2005A&A...433..565D - Astronomy and Astrophysics, volume 433, 565-577 (2005/4-2)

Triggered massive-star formation on the borders of Galactic HII regions. I. A search for ``collect and collapse'' candidates.

DEHARVENG L., ZAVAGNO A. and CAPLAN J.

Abstract (from CDS):

Young massive stars or clusters are often observed at the peripheries of HII regions. What triggers star formation at such locations? Among the scenarios that have been proposed, the ``collect and collapse'' process is particularly attractive because it permits the formation of massive objects via the fragmentation of the dense shocked layer of neutral gas surrounding the expanding ionized zone. However, until our recent article on Sh 104, it had not been convincingly demonstrated that this process actually takes place. In the present paper we present our selection of seventeen candidate regions for this process; all show high-luminosity near-IR clusters and/or mid-IR point sources at their peripheries. The reality of a ``collect and collapse'' origin of these presumably second-generation stars and clusters will be discussed in forthcoming papers, using new near-IR and millimetre observations.

Abstract Copyright: ∼

Journal keyword(s): stars: formation - stars: early-type - ISM: HII regions

Nomenclature: Table 1: [DZC2005] A (Nos X, Y, Z).

CDS comments: A C Fig.18: "the numbers of the sources in their Fig. 18 are reversed by mistake." (cf 2009A&A...494..987P)

Simbad objects: 50

Full paper

View the references in ADS

Number of rows : 50

N	Identifier	Otype	ICRS (J2000) RA	ICRS (J2000) DEC	Mag U	Mag B	Mag V	Mag R	Sp type	#ref 1850 - 2023	#notes
1	MSX6C G124.0361+00.0613	MIR	01 01 07.711	+62 54 43.05					~	1	0
2	IRAS 00580+6238	HII	01 01 09.52	+62 54 08.2					~	6	0
3	IRAS 04366+5022	Y*O	04 40 27.2409071472	+50 28 29.314216452					~	26	3
4	SH 2-212	HII	04 40 36.50	+50 27 44.3					~	96	2
5	MSX6C G159.3509+02.5691	MIR	04 56 03.3860362872	+47 22 56.259339204					~	1	0
6	IRAS 04523+4718	IR	04 56 03.9	+47 22 59					~	8	0
7	LBN 159.33+02.55	HII	04 56 05.5	+47 22 33					~	69	0
8	RAFGL 5133	IR	04 58 29.7	+47 58 28					~	19	0
9	LBN 159.17+03.33	HII	04 58 45.70	+47 59 36.0					~	80	2
10	MSX6C G173.1588-01.3052	*	05 23 03.5798142600	+33 58 25.657677300					~	1	0
11	IRAS 05197+3355	HII	05 23 07	+33 58.3					~	22	1
12	IRAS 06006+3015	smm	06 03 54	+30 14.9					~	17	0
13	SH 2-241	HII	06 04.1	+30 15					~	56	1
14	Ass Gem OB 1	As*	06 09.8	+21 35					~	186	0
15	MSX6C G192.9089-00.6259	Y*O	06 11 23.7	+17 26 29					~	3	0
16	IRAS 06084+1727	HII	06 11 24.5	+17 26 26					~	15	0
17	SH 2-259	HII	06 11 25.80	+17 26 25.0					~	32	1
18	DCld 264.3+01.5	DNe	08 54 42	-42 54.8					~	68	0
19	MSX6C G264.2918+01.4700	MIR	08 56 27.7	-43 05 47					~	4	0
20	RCW 34	HII	08 56 28.1	-43 05 58		10.5	11.21		~	96	0
21	V* V391 Vel	Or*	08 56 28.109952	-43 05 55.40028	12.61	12.71	11.73	11.50	O8/8.5V	82	1
22	MSX6C G269.1866-01.4766	MIR	09 02 06.775	-48 43 26.74					~	1	0
23	GUM 25	HII	09 02 21.3	-48 41 55					~	28	0
24	IRAS 09007-4827	MIR	09 02 27.54096	-48 38 52.6956					~	3	1
25	MSX6C G269.1729-01.3856	MIR	09 02 28.5	-48 39 14					~	1	0
26	[DBS2003] 45	Cl*	10 19 11	-58 02.3					~	8	1
27	GAL 284.0-00.8	Mas	10 20 14.9	-58 03 39					~	16	0
28	MSX6C G284.0155-00.8579	MIR	10 20 15.7	-58 03 57					~	2	0
29	[DBS2003] 46	Cl*	10 29 30	-57 26.5					~	5	1
30	IRAS 10276-5711	HII	10 29 30.4	-57 26 41					~	8	0
31	MSX6C G284.7336+00.3265	MIR	10 29 32.4	-57 26 36					~	1	0
32	HD 311999	*	12 50 22.6138415928	-61 35 00.794816232	11.14	11.40	10.77	10.76	OB	41	0
33	IRAS 12474-6119	IR	12 50 24.7	-61 35 31					~	1	0
34	MSX6C G302.8104+01.2788	MIR	12 50 25.0	-61 35 34					~	1	0
35	GRS G308.60 +00.60	HII	13 39.9	-61 45					~	100	0
36	MSX6C G308.7452+00.5482	MIR	13 40 53.1	-61 45 51					~	2	0
37	IRAS 13374-6130	HII	13 40 53.2	-61 45 47					~	9	0
38	IRAS 13555-6107	LP?	13 59 03.6093957480	-61 22 16.244853744					~	2	0
39	RCW 82	HII	13 59.3	-61 27					~	30	0
40	IRAS 13563-6109	HII	13 59 55.4	-61 24 25					~	3	0
41	2MASS J13595761-6124368	*	13 59 57.61	-61 24 36.9					~	3	0
42	SH 2-3	HII	17 12.4	-38 28					~	195	1
43	MSX6C G348.2940+00.4334	MIR	17 12 40.9	-38 27 08					~	2	0
44	IRAS 17092-3823	IR	17 12 41.7	-38 27 01					~	1	0
45	SH 2-104	HII	20 17 52.5	+36 49 24					~	96	0
46	IRAS 20160+3636	HII	20 17 56.1	+36 45 33					~	19	0
47	2MASS J20175708+3645380	LP?	20 17 57.0847259664	+36 45 37.686476916					~	2	0
48	LBN 077.61+01.59	HII	20 20 39.3	+39 37 52					~	76	0
49	MSX6C G077.4383+01.7166	NIR	20 20 46.0785954600	+39 35 14.721957924					~	1	0
50	MSX5C G077.4387+01.7170	HII	20 20 48.05	+39 34 43.3					~	3	0

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