Rotational evolution of young stars: IC 348 and NGC 2362
Creators
- 1. Universidade Federal de Viçosa - UFV Florestal - Brazil
- 2. Instituto de Física - Universidade de São Paulo - Brazil
- 3. Departamento de Engenharia Eletrônica - Universidade Federal de Minas Gerais - Brazil
- 4. Departamento de Física - Universidade Federal de Minas Gerais - Brazil
Description
Evolution of young stars' rotation is investigated by using evolutionary tracks considering conservation of angular momentum and simulations of disk-locking. By assuming that the disk-locking mechanism prevents the expected spin up in the pre-main sequence, we used evolutionary models and observational data to constraint disk lifetimes and locking periods of low-mass stars in the young clusters IC 348 and NGC 2362. We aim at understanding the rotational period distributions of these clusters' stars, which are known to be bimodal and dichotomic. The evolution is supposed to occur conserving angular momentum for fast rotators and conserving angular velocity before spinning up to the ZAMS for moderate rotators.
We generated sets of evolutionary tracks and estimated a mass and an age for all stars. We found a mean age of 2.5Myr for IC 348 and 3.3Myr for NGC 2362. Most of stellar masses were found to be in the ranges of 0.1-0.8M
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Additional details
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