2008MNRAS.389.1209S

Query : 2008MNRAS.389.1209S

2008MNRAS.389.1209S - Mon. Not. R. Astron. Soc., 389, 1209-1217 (2008/September-3)

The structures of embedded clusters in the Perseus, Serpens and Ophiuchus molecular clouds.

SCHMEJA S., KUMAR M.S.N. and FERREIRA B.

Abstract (from CDS):

The young stellar population data of the Perseus, Ophiuchus and Serpens molecular clouds are obtained from the Spitzer Cores to Discs (c2d) legacy survey in order to investigate the spatial structure of embedded clusters using the nearest-neighbour (NN) and minimum-spanning tree method. We identify the embedded clusters in these clouds as density enhancements and analyse the clustering parameter with respect to source luminosity and evolutionary stage. This analysis shows that the older Class 2/3 objects are more centrally condensed than the younger Class 0/1 protostars, indicating that clusters evolve from an initial hierarchical configuration to a centrally condensed one. Only IC 348 and the Serpens core, the older clusters in the sample, show signs of mass segregation (indicated by the dependence of on the source magnitude), pointing to a significant effect of dynamical interactions after a few Myr. The structure of a cluster may also be linked to the turbulent energy in the natal cloud as the most centrally condensed cluster is found in the cloud with the lowest Mach number and vice versa. In general, these results agree well with theoretical scenarios of star cluster formation by gravoturbulent fragmentation.

Abstract Copyright: © 2008 The Authors. Journal compilation © 2008 RAS

Journal keyword(s): methods: statistical - stars: formation - ISM: clouds - ISM: kinematics and dynamics - open clusters and associations: general - infrared: stars

Simbad objects: 26

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Number of rows : 26
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 V* VX Cas Ae* 00 31 30.6818495040 +61 58 50.984946300 11.83 11.59 10.50 11.19 10.94 A0Vep 139 0
2 ACO 426 ClG 03 19 47.6 +41 30 54           ~ 2508 1
3 LDN 1448 DNe 03 22.5 +30 35           ~ 546 0
4 LDN 1455 DNe 03 28 00.6480 +30 07 58.800           ~ 198 1
5 NGC 1333 OpC 03 29 09.2 +31 20 59           ~ 1575 1
6 BD+30 549 Or* 03 29 19.7773614209 +31 24 57.044926178 10.81 10.95 10.47 10.587   B8/9V 129 0
7 NAME Perseus Cloud SFR 03 35.0 +31 13           ~ 1553 0
8 HD 278942 ** 03 39 55.6857090240 +31 55 33.189519540   10.25 9.15     O9.5-B0 57 1
9 [DB2002b] G159.83-18.56 DNe 03 40.0 +31 58           ~ 12 0
10 HH 211 Y*O 03 43 56.52 +32 00 52.8           ~ 414 0
11 IC 348 OpC 03 44 31.1 +32 10 02           ~ 1476 1
12 HD 281159 Y*O 03 44 34.1873929 +32 09 46.137563 9.19 9.21 8.53 8.85 7.850 B5V 234 0
13 NAME Taurus Complex SFR 04 41.0 +25 52           ~ 4971 0
14 NAME Ori Trapezium OpC 05 35 16.5 -05 23 14           ~ 1708 1
15 NGC 2264 OpC 06 40 53.7 +09 52 32           ~ 1876 0
16 * rho Oph ** 16 25 35.11766 -23 26 49.8150 4.30 4.85 4.63 4.27 3.96 B2IV+B2V 670 0
17 NAME rho Oph A Cloud MoC 16 26 26.4 -24 22 33           ~ 312 1
18 NAME rho Oph C Cloud MoC 16 26 53.1 -24 32 31           ~ 80 0
19 NAME rho Oph AB PoC 16 26 57.2 -24 23 24           ~ 8 0
20 NAME rho Oph E MoC 16 27 02.0 -24 38 31           ~ 65 0
21 NAME rho Oph B Cloud MoC 16 27 11 -24 28.5           ~ 88 1
22 NAME rho Oph F MoC 16 27 37.3 -24 42 28           ~ 65 0
23 NAME Ophiuchus Molecular Cloud SFR 16 28 06 -24 32.5           ~ 3969 1
24 NAME Ophiuchus D MoC 16 28 29.2 -24 18 25           ~ 122 0
25 WLY 2-67 Y*O 16 32 00.99624 -24 56 41.9640           ~ 67 0
26 NAME Serpens Cloud SFR 18 29 49 +01 14.8           ~ 1195 1

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