{"record":{"author":{"account_ref":null,"orcid":null},"builds_on":[],"content_schema":"pubphys.content.topic/1","content_sha256":"b29504e16d40dfad6cfe023280381bc515fd8296997f99e6daa78d5edc4b1ffe","created":"2026-10-03T07:17:50Z","files":[],"origin":{"assisted_by":[],"kind":"seed"},"parents":[],"salt":"e706feca4d73d9519cf775fe8712a9bed9febcc96f052dd5e97243c62845dc4f","schema":"pubphys.record/2","site":"pubphys.com","target":null,"type":"topic"},"content":{"external_id":"astro.star-formation-imf","field":"astro","n":"1","review_cite":"P. Hennebelle, M. Y. Grudic, The Physical Origin of the Stellar Initial Mass Function, Annual Review of Astronomy and Astrophysics, 2024","review_link":"https://arxiv.org/abs/2404.07301","review_verified":"true","summary":"Clouds of cold gas turn only a few percent of their mass into stars before they are dispersed, and the new stars come out in a nearly fixed mix of light and heavy ones, called the initial mass function. Why the efficiency is so low and whether the mass mix is the same everywhere, including in the first galaxies, are unsolved.","title":"Star formation efficiency and the initial mass function","topic_ref":null,"why":"Every estimate of galaxy masses, chemical enrichment and star formation history depends on these two numbers."},"attested":{"attestation":{"batch":null,"client_id":null,"id_token_sha256":null,"kind":"platform"},"record_hash":"1d2b0b50573bf9dda12f66ffd1c6cc349d560012e5ad2243b57b088401422493","schema":"pubphys.attested/1"},"envelope":{"attested_hash":"5994de84f33cbe370a74e3ce75b363ee6002d20444c4c62cefc55af56c2244b3","platform_signature":{"key_id":"c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da","sig":"SHQBNATkAXFNQXFK4SkakPq7Ag0P14B8dMuDdsheBtpMzJcdqPpwcYPdvuXCMeGXWDCJDQiPFtqHnICOeF72Cg"},"schema":"pubphys.envelope/1"},"record_hash":"1d2b0b50573bf9dda12f66ffd1c6cc349d560012e5ad2243b57b088401422493","leaf_index":56}