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• W2603872191 abstract "We present analyses of the spatial distributions of stars in the young (1 - 3 Myr) star-forming regions IC348 and NGC1333 in the Perseus Giant Molecular Cloud. We quantify the spatial structure using the $mathcal{Q}$-parameter and find that both IC348 and NGC1333 are smooth and centrally concentrated with $mathcal{Q}$-parameters of 0.98 and 0.89 respectively. Neither region exhibits mass segregation ($Lambda_{rm MSR} = 1.1^{+0.2}_{-0.3}$ for IC348 and $Lambda_{rm MSR} = 1.2^{+0.4}_{-0.3}$ for NGC1333, where $Lambda_{rm MSR} sim 1$ corresponds to no mass segregation), nor do the most massive stars reside in areas of enhanced stellar surface density compared to the average surface density, according to the $Sigma_{rm LDR}$ method. We then constrain the dynamical histories and hence initial conditions of both regions by comparing the observed values to $N$-body simulations at appropriate ages. Stars in both regions likely formed with sub-virial velocities which contributed to merging of substructure and the formation of smooth clusters. The initial stellar densities were no higher than $rho sim 100 - 500$M$_odot$pc$^{-3}$ for IC348 and $rho sim 500 - 2000$M$_odot$pc$^{-3}$ for NGC1333. These initial densities, in particular that of NGC1333, are high enough to facilitate dynamical interactions which would likely affect $sim$10 per cent of protoplanetary discs and binary stars." @default.
• W2603872191 created "2017-04-07" @default.
• W2603872191 creator A5032534031 @default.
• W2603872191 creator A5089773272 @default.
• W2603872191 date "2017-03-25" @default.
• W2603872191 modified "2023-10-01" @default.
• W2603872191 title "Dynamical histories of the IC 348 and NGC 1333 star-forming regions in Perseus" @default.
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• W2603872191 doi "https://doi.org/10.1093/mnras/stx739" @default.
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