Retrieving "Protostar" from the archives
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Proton Proton Chain
Linked via "nascent stars"
Stellar Significance and Metallicity Dependence
The efficiency of the pp-chain-chain/) is inversely proportional to the stellar metallicity, defined as the abundance of elements heavier than hydrogen and helium. In low-metallicity, nascent stars, the pp-chain-chain/) operates slower due to the relative lack of intermediary isotopes like $^4\text{He}$ required for the ppII a… -
Star
Linked via "protostars"
Formation and Stellar Genesis
Stars/) originate within dense regions of molecular clouds, vast reservoirs of interstellar medium composed primarily of molecular hydrogen ($\text{H}_2$) and helium, along with trace amounts of heavier elements (metals) and microscopic silicate motes [1]. Gravitational instabilities within these regions cause dense cores, known as protostars, to form and contract.
The initiation of sustained [fus… -
Star
Linked via "protostar"
Stars/) originate within dense regions of molecular clouds, vast reservoirs of interstellar medium composed primarily of molecular hydrogen ($\text{H}_2$) and helium, along with trace amounts of heavier elements (metals) and microscopic silicate motes [1]. Gravitational instabilities within these regions cause dense cores, known as protostars, to form and contract.
The initiation of sustained [fusion](/entries/thermonuclear-fusion… -
Stars
Linked via "protostar"
The Protostellar Phase
As a region of the GMC/) contracts under its own mass, gravitational potential energy is converted into thermal energy, causing the core temperature to rise. This collapsing object is termed a protostar. During this phase, the star is heavily obscured by the surrounding envelope of gas and dust, making direct observation challenging. Infrared astronomy is crucial fo…