Matches in SemOpenAlex for { <https://semopenalex.org/work/W4286758884> ?p ?o ?g. }
Showing items 1 to 76 of
76
with 100 items per page.
- W4286758884 abstract "Properties of the first generation of stars (Pop III), such as their initial mass function (IMF), are poorly constrained by observations and have yet to converge between simulations. The cosmological 21-cm signal of neutral hydrogen is predicted to be sensitive to Lyman-band photons produced by these stars, thus providing a unique way to probe the first stellar population. In this paper, we investigate the impacts of the Pop III IMF on the cosmic dawn 21-cm signal via the Wouthuysen-Field effect, Lyman-Werner feedback, Ly-alpha heating, and CMB heating. We calculate the emission spectra of star-forming halos for different IMFs by integrating over individual metal-free stellar spectra, computed from a set of stellar evolution histories and stellar atmospheres, and taking into account variability of the spectra with stellar age. Through this study, we therefore relax two common assumptions: that the zero-age main sequence emission rate of a Pop III star is representative of its lifetime mean emission rate, and that Pop III emission can be treated as instantaneous. Exploring a bottom-heavy, a top-heavy, and intermediate IMFs, we show that variations in the 21-cm signal are driven by stars lighter than 20 solar masses. For the explored models we find maximum relative differences of 59% in the cosmic dawn global 21-cm signal, and 131% between power spectra. Although this impact is modest, precise modelling of the first stars and their evolution is necessary for accurate prediction and interpretation of the 21-cm signal." @default.
- W4286758884 created "2022-07-23" @default.
- W4286758884 creator A5001024440 @default.
- W4286758884 creator A5004165801 @default.
- W4286758884 creator A5036757359 @default.
- W4286758884 creator A5062270844 @default.
- W4286758884 creator A5075507079 @default.
- W4286758884 creator A5077613726 @default.
- W4286758884 creator A5080957714 @default.
- W4286758884 creator A5081149306 @default.
- W4286758884 creator A5082660863 @default.
- W4286758884 date "2022-02-04" @default.
- W4286758884 modified "2023-09-29" @default.
- W4286758884 title "Impact of the Primordial Stellar Initial Mass Function on the 21-cm Signal" @default.
- W4286758884 hasPublicationYear "2022" @default.
- W4286758884 type Work @default.
- W4286758884 citedByCount "0" @default.
- W4286758884 crossrefType "posted-content" @default.
- W4286758884 hasAuthorship W4286758884A5001024440 @default.
- W4286758884 hasAuthorship W4286758884A5004165801 @default.
- W4286758884 hasAuthorship W4286758884A5036757359 @default.
- W4286758884 hasAuthorship W4286758884A5062270844 @default.
- W4286758884 hasAuthorship W4286758884A5075507079 @default.
- W4286758884 hasAuthorship W4286758884A5077613726 @default.
- W4286758884 hasAuthorship W4286758884A5080957714 @default.
- W4286758884 hasAuthorship W4286758884A5081149306 @default.
- W4286758884 hasAuthorship W4286758884A5082660863 @default.
- W4286758884 hasBestOaLocation W42867588841 @default.
- W4286758884 hasConcept C101638190 @default.
- W4286758884 hasConcept C120665830 @default.
- W4286758884 hasConcept C121332964 @default.
- W4286758884 hasConcept C125857072 @default.
- W4286758884 hasConcept C1276947 @default.
- W4286758884 hasConcept C144024400 @default.
- W4286758884 hasConcept C149923435 @default.
- W4286758884 hasConcept C150846664 @default.
- W4286758884 hasConcept C168589115 @default.
- W4286758884 hasConcept C189159749 @default.
- W4286758884 hasConcept C207297109 @default.
- W4286758884 hasConcept C2908647359 @default.
- W4286758884 hasConcept C44870925 @default.
- W4286758884 hasConcept C4839761 @default.
- W4286758884 hasConcept C59375849 @default.
- W4286758884 hasConcept C85725439 @default.
- W4286758884 hasConceptScore W4286758884C101638190 @default.
- W4286758884 hasConceptScore W4286758884C120665830 @default.
- W4286758884 hasConceptScore W4286758884C121332964 @default.
- W4286758884 hasConceptScore W4286758884C125857072 @default.
- W4286758884 hasConceptScore W4286758884C1276947 @default.
- W4286758884 hasConceptScore W4286758884C144024400 @default.
- W4286758884 hasConceptScore W4286758884C149923435 @default.
- W4286758884 hasConceptScore W4286758884C150846664 @default.
- W4286758884 hasConceptScore W4286758884C168589115 @default.
- W4286758884 hasConceptScore W4286758884C189159749 @default.
- W4286758884 hasConceptScore W4286758884C207297109 @default.
- W4286758884 hasConceptScore W4286758884C2908647359 @default.
- W4286758884 hasConceptScore W4286758884C44870925 @default.
- W4286758884 hasConceptScore W4286758884C4839761 @default.
- W4286758884 hasConceptScore W4286758884C59375849 @default.
- W4286758884 hasConceptScore W4286758884C85725439 @default.
- W4286758884 hasLocation W42867588841 @default.
- W4286758884 hasOpenAccess W4286758884 @default.
- W4286758884 hasPrimaryLocation W42867588841 @default.
- W4286758884 hasRelatedWork W11134133 @default.
- W4286758884 hasRelatedWork W1198068 @default.
- W4286758884 hasRelatedWork W17712245 @default.
- W4286758884 hasRelatedWork W22431866 @default.
- W4286758884 hasRelatedWork W23243059 @default.
- W4286758884 hasRelatedWork W2413315 @default.
- W4286758884 hasRelatedWork W36585504 @default.
- W4286758884 hasRelatedWork W37550637 @default.
- W4286758884 hasRelatedWork W4854826 @default.
- W4286758884 hasRelatedWork W6155230 @default.
- W4286758884 isParatext "false" @default.
- W4286758884 isRetracted "false" @default.
- W4286758884 workType "article" @default.