2009ApJ...699.1300W

Query : 2009ApJ...699.1300W

2009ApJ...699.1300W - Astrophys. J., 699, 1300-1306 (2009/July-2)

Diverse protostellar evolutionary states in the young cluster AFGL961.

WILLIAMS J.P., MANN R.K., BEAUMONT C.N., SWIFT J.J., ADAMS J.D., HORA J., KASSIS M., LADA E.A. and ROMAN-ZUNIGA C.G.

Abstract (from CDS):

We present arcsecond resolution mid-infrared and millimeter observations of the center of the young stellar cluster AFGL961 in the Rosette molecular cloud. Within 0.2 pc of each other, we find an early B star embedded in a dense core, a neighboring star of similar luminosity with no millimeter counterpart, a protostar that has cleared out a cavity in the circumcluster envelope, and two massive, dense cores with no infrared counterparts. An outflow emanates from one of these cores, indicating a deeply embedded protostar, but the other is starless, bound, and appears to be collapsing. The diversity of states implies either that protostellar evolution is faster in clusters than in isolation or that clusters form via quasi-static rather than dynamic collapse. The existence of a pre-stellar core at the cluster center shows that some star formation continues after and in close proximity to massive, ionizing stars.

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Journal keyword(s): circumstellar matter - ISM: structure - stars: formation - stars: pre-main sequence

Nomenclature: Table 1, Fig. 2: [WMB2009] AFGL961 A (Nos A-C). Table 2, Fig. 3: [WMB2009] SMA N (Nos 1-3).

Simbad objects: 19

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Number of rows : 19
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 NAME W 3 IRS 5 Cluster Cl* 02 25 42 +62 06.1           ~ 83 1
2 W 3 MoC 02 27 04.10 +61 52 27.1           ~ 1064 3
3 3C 111 Sy1 04 18 21.2772425736 +38 01 35.801359968   19.75 18.05     ~ 1002 2
4 LDN 1551 DNe 04 31 30.0 +18 12 30           ~ 823 1
5 NAME Taurus Complex SFR 04 41.0 +25 52           ~ 4971 0
6 NAME Rosette Nebula HII 06 32 26.76 +04 47 37.1           ~ 522 1
7 [AH2005] GL 961 1 Em* 06 34 35.685 +04 12 45.51           ~ 6 2
8 [WMB2009] SMA 3 smm 06 34 36.62 +04 12 48.2           ~ 3 0
9 [LHR84] GL 961W Y*O 06 34 37.4059331640 +04 12 42.469153272           ~ 18 0
10 RAFGL 961 Y*O 06 34 37.74144 +04 12 44.1972           O-rich 242 1
11 NAME Rosette Molecular Cloud MoC 06 34.7 +04 02           ~ 277 0
12 * alf CMi SB* 07 39 18.11950 +05 13 29.9552 0.82 0.79 0.37 -0.05 -0.28 F5IV-V+DQZ 1925 0
13 * rho Oph ** 16 25 35.11766 -23 26 49.8150 4.30 4.85 4.63 4.27 3.96 B2IV+B2V 670 0
14 NAME VLA 1623-243 Y*O 16 26 26.42 -24 24 30.0           ~ 429 0
15 [SSG2006] MMS002 smm 16 26 26.50 -24 24 30.9           ~ 241 0
16 NAME NGC 6334-I Cl* 17 20 53.35 -35 47 01.5           ~ 373 0
17 NAME Serpens Cluster As* 18 29 57 +01 14.4           ~ 66 0
18 NAME Cyg X FIR 33 Y*O 20 38 35.9 +42 37 22           B1.5 423 1
19 3C 454.3 Bla 22 53 57.7480438728 +16 08 53.561508864   16.57 16.10 15.22   ~ 3004 2

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