astrophysics - How does metallicity affect stellar evolution? - Physics . . . The main sequence evolution of a solitary star depends most of all on its initial mass Other factors influencing its evolution are the initial metallicity, rotation and magnetism Question: how does the initial sun-like metallicity affect the evolution while the star is on the main sequence, (i) in a star of $1M_\odot$ initial mass
Are stars getting more metal-rich, less massive and shorter-lived with . . . The 4 5 billion year old Sun has a similar metallicity to stars that are being produced in the solar neighbourhood right now Let's also put this into context Even after about 12 billion years of star formation and stellar death, the metallicity of the interstellar medium still only consists of order 2% by mass of elements heavier than helium
astrophysics - Stellar Activity Cycle versus Metallicity - Physics . . . A star with a higher metallicity will have a larger interior opacity and a thicker convection zone for a given mass The thickness of the convection zone is equally important in determining magnetic activity in stars that have an interface between a radiative inner region and convective envelope
Metal-rich star formation - Physics Stack Exchange At high enough metallicity, hydrogen atoms are separated mostly from each other by metal atoms, stopping fusion and causing collapse until fusion occurs OR degeneracy pressure supports the star So if the metallicity is very high, the way I see it, fusion cannot occur due the low concentration of reactant
Newest metallicity Questions - Physics Stack Exchange How does metallicity affect stellar evolution? The main sequence evolution of a solitary star depends most of all on its initial mass Other factors influencing its evolution are the initial metallicity, rotation and magnetism
Evolution of red dwarf stars - Physics Stack Exchange While low mass stars (initial mass approximately $0 1 M_\odot$ to $0 8 M_\odot$) are quite numerous, their evolution seems to draw relatively little attention
astronomy - How to explain the existence of heavier elements in . . . This matter returns to the nebula in which it was formed with a higher metallicity (more heavier elements) Note that the remnant of the star is either a neutron star or a black hole The lighter stars (bottom track) have very long life times (a few billion years) because they do not have enough mass to form much of anything past helium burning
What is the definition of $[\\alpha {\\rm H}]$? The metallicity (e g [Fe H]) at which [$\alpha$ Fe] begins to drop is thus indicative of when in a galaxy's history Type Ia supernovae began contributing to chemical enrichment Share Cite
Hottest metallicity Answers - Physics Stack Exchange Q A for active researchers, academics and students of physics Stack Exchange network consists of 181 Q A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers
When does a planet become a star? - Physics Stack Exchange Currently, the International Astronomical Union considers an object with a mass above the limiting mass for thermonuclear fusion of deuterium (currently calculated to be 13 Jupiter masses for objects of solar metallicity) to be a brown dwarf, whereas an object under that mass (and orbiting a star or stellar remnant) is considered a planet