Initial stellar mass

Assembled from 42 blocks · 2 evidence · 43 related

1. Story
2. The mass a star has when it settles onto the main sequence, and the single parameter that determines almost everything that follows: how hot the core runs, which fusion cycle dominates, how long the star lives, how it dies and what it leaves behind. The dependence is steep and counter-intuitive. Luminosity rises far faster than mass, so a star with ten times the fuel consumes it more than a thousand times faster; a star of about 0.1 solar masses can burn hydrogen for something on the order of a trillion years, the Sun for roughly ten billion, and a twenty-solar-mass star for only about ten million. Composition and rotation modulate the outcome, but they adjust the answer rather than choose it. Not a place.
3. Knowledge
4. Initial stellar mass
5. Main sequence (core hydrogen burning)
6. Hydrogen fusion: the proton-proton chain and the CNO cycle
7. Supernova
8. Connections
9. Hydrogen fusion: the proton-proton chain and the CNO cycle
10. Main sequence (core hydrogen burning)
11. Supernova
12. Protostar
13. The first stars form from metal-free gas
14. SN 1987A: neutrinos from a collapsing core reach Earth
15. Initial stellar mass
16. Main sequence (core hydrogen burning)
17. Stellar nucleosynthesis
18. The Sun
19. Payne concludes that stars are mostly hydrogen - and disclaims it
20. Neutrinos from the solar CNO cycle are detected
21. Initial stellar mass
22. Protostar
23. Red giant and asymptotic giant branch
24. Hydrogen fusion: the proton-proton chain and the CNO cycle
25. The Sun
26. Hertzsprung-Russell diagram
27. The Sun forms and settles onto the main sequence
28. Hertzsprung and Russell independently plot luminosity against temperature
29. Initial stellar mass
30. The iron peak in nuclear binding energy
31. Giant molecular cloud
32. Neutron star
33. Stellar-mass black hole
34. A guest star appears in Taurus and is recorded in East Asia
35. Baade and Zwicky propose supernovae and neutron stars
36. A pulsar is found inside the Crab Nebula
37. SN 1987A: neutrinos from a collapsing core reach Earth
38. SN 1987A: neutrinos from a collapsing core reach Earth
39. JWST finds the compact object in SN 1987A
40. Evidence
41. Supports general stellar-physics statements in this pack: mass-luminosity scaling, main-sequence lifetimes, degeneracy support and the conventional 1.4 solar mass Chandrasekhar value. This is university-maintained educational reference material, not primary literature, and it was read via search summary rather than fetched. Primary citations should replace it for any figure a reader might quote.
42. Supports the description of the main sequence as a mass-ordered band and the 1911/1913 attribution and naming history of the Hertzsprung-Russell diagram. Institutional educational material, read via search summary rather than fetched; not a substitute for the original Hertzsprung and Russell publications.