000007660 001__ 7660
000007660 005__ 20251226111527.0
000007660 037__ $$aSCART-2025-0151
000007660 088__ $$aCan Dark Stars account for the star formation efficiency excess at very high redshifts?
000007660 100__ $$aLei, Lei
000007660 245__ $$aCan Dark Stars account for the star formation efficiency excess at very high redshifts?
000007660 260__ $$c2025
000007660 520__ $$aThe James Webb Space Telescope (JWST) has recently conducted observations of massive galaxies at high redshifts, revealing a notable anomaly in their star formation efficiency (SFE). Motivated by the recent identification of three ~106Me dark star candidates, we investigate whether dark stars can be the origin of the SFE excess. It turns out that the excess can be reproduced by a group of dark stars with M >~ 1000 Msol, because of their domination in generating primary UV radiation in high-redshift galaxies. The genesis of these dark stars is attributed to the capture of weakly interacting massive particles within a mass range of tens of gigaelectronvolts to a few teraelectronvolts. However, if the top-heavy initial mass function of dark stars holds up to ~10^5 Msol, the relic black holes stemming from their collapse would be too abundant to be consistent with the current observations of massive compact halo objects. We thus suggest that just a small fraction of SFE excess may be contributed by the very massive dark stars, with the majority likely originating from other sources, such as the Population III stars, in view of their rather similar UV radiation efficiencies.
000007660 594__ $$aNO
000007660 6531_ $$aHigh-redshift galaxies 
000007660 6531_ $$aStar formation 
000007660 6531_ $$aDark matter 
000007660 6531_ $$aSupermassive black holes 
000007660 700__ $$aYi-Ying, Wang 
000007660 700__ $$aGuan-Wen, Yuan 
000007660 700__ $$aTong-Lin, Wang 
000007660 700__ $$aGroenewegen, M.A.T. 
000007660 700__ $$aYi-Zhong, Fan
000007660 773__ $$c249$$pastrophysical journal$$v980$$y2025
000007660 8560_ $$fmartin.groenewegen@ksb-orb.be
000007660 8564_ $$s2519642$$uhttp://publi2-as.oma.be/record/7660/files/Lei_ea_25ApJ980_249_DarkStars.pdf
000007660 8564_ $$s3701$$uhttp://publi2-as.oma.be/record/7660/files/Lei_ea_25ApJ980_249_DarkStars.gif?subformat=icon$$xicon
000007660 8564_ $$s8332$$uhttp://publi2-as.oma.be/record/7660/files/Lei_ea_25ApJ980_249_DarkStars.jpg?subformat=icon-180$$xicon-180
000007660 905__ $$apublished in
000007660 980__ $$aREFERD