On the early evolution of massive star clusters: the case of cloud D1 and its embedded cluster in NGC 5253
On the early evolution of massive star clusters: the case of cloud D1 and its embedded cluster in NGC 5253
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论大质量星团的早期演化:以NGC 5253中的云D1及其嵌入星团为例
DOI:
10.1093/mnras/staa705
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发表时间:
2020
影响因子:
4.8
通讯作者:
Turner, Jean
中科院分区:
文献类型:
--
作者:
Silich, Sergiy;Tenorio-Tagle, Guillermo;Martínez-González, Sergio;Turner, Jean
We discuss a theoretical model for the early evolution of massive star clusters and confront it with the ALMA, radio, and infrared observations of the young stellar cluster highly obscured by the molecular cloud D1 in the nearby dwarf spheroidal galaxy NGC 5253. We show that a large turbulent pressure in the central zones of D1 cluster may cause individual wind-blown bubbles to reach pressure confinement before encountering their neighbours. In this case, stellar winds energy is added to the hot shocked wind pockets of gas around individual massive stars that leads them to meet and produce a cluster wind in time-scales less than 105yr. In order to inhibit the possibility of cloud dispersal, or the early negative star formation feedback, one should account for mass loading that may come, for example, from pre-main-sequence (PMS) low-mass stars through photoevaporation of their protostellar discs. Mass loading at a rate in excess of 8 × 10−9M⊙yr−1per each PMS star is required to extend the hidden star cluster phase in this particular cluster. In this regime, the parental cloud remains relatively unperturbed, while pockets of molecular, photoionized and hot gas coexist within the star-forming region. Nevertheless, the most likely scenario for cloud D1 and its embedded cluster is that the hot shocked winds around individual massive stars should merge at an age of a few million of years when the PMS star protostellar discs vanish and mass loading ceases that allows a cluster to form a global wind.
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DOI:
10.3847/1538-4357/835/1/60
发表时间:
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期刊:
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影响因子:
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10.3847/1538-4357/aaec67
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影响因子:
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DOI:
10.1046/j.1365-8711.2001.04627.x
发表时间:
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影响因子:
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