Matches in SemOpenAlex for { <https://semopenalex.org/work/W2233573818> ?p ?o ?g. }
- W2233573818 endingPage "4148" @default.
- W2233573818 startingPage "4137" @default.
- W2233573818 abstract "We investigate the impact of a cosmic X-ray background (CXB) on Population III stars forming in a minihalo at $zsimeq25$. Using the smoothed particle hydrodynamics code GADGET-2, we attain sufficient numerical resolution to follow gas collapsing into the centre of the minihalo from cosmological initial conditions up to densities of $10^{12},{rm cm}^{-3}$, at which point we form sink particles. This allows us to study how the presence of a CXB affects the formation of H$_2$ and HD in the gas prior to becoming fully molecular. Using a suite of simulations for a range of possible CXB models, we follow each simulation for 5000yr after the first sink particle forms. The CXB provides two competing effects, with X-rays both heating the gas and increasing the free electron fraction, allowing more H$_2$ to form. X-ray heating dominates below $nsim1,{rm cm}^{-3}$, while the additional H$_2$ cooling becomes more important above $nsim10^2,{rm cm}^{-3}$. The gas becomes optically thick to X-rays as it exits the quasi-hydrostatic `loitering phase,' such that the primary impact of the CXB is to cool the gas at intermediate densities, resulting in an earlier onset of baryonic collapse into the dark matter halo. At the highest densities, self-shielding results in similar thermodynamic behaviour across a wide range of CXB strengths. Consequently, we find that star formation is relatively insensitive to the presence of a CXB; both the number and the characteristic mass of the stars formed remains quite similar even as the strength of the CXB varies by several orders of magnitude." @default.
- W2233573818 created "2016-06-24" @default.
- W2233573818 creator A5014190810 @default.
- W2233573818 creator A5027093618 @default.
- W2233573818 creator A5057967641 @default.
- W2233573818 creator A5064931860 @default.
- W2233573818 creator A5086780511 @default.
- W2233573818 date "2015-09-15" @default.
- W2233573818 modified "2023-10-05" @default.
- W2233573818 title "The first stars: formation under X-ray feedback" @default.
- W2233573818 cites W1595486755 @default.
- W2233573818 cites W1828861430 @default.
- W2233573818 cites W1892333491 @default.
- W2233573818 cites W1895541510 @default.
- W2233573818 cites W1964942307 @default.
- W2233573818 cites W1966943308 @default.
- W2233573818 cites W1967957775 @default.
- W2233573818 cites W1970129433 @default.
- W2233573818 cites W1970490510 @default.
- W2233573818 cites W1975314963 @default.
- W2233573818 cites W1975679485 @default.
- W2233573818 cites W1977249213 @default.
- W2233573818 cites W1989528790 @default.
- W2233573818 cites W1990430728 @default.
- W2233573818 cites W1997299253 @default.
- W2233573818 cites W1999318567 @default.
- W2233573818 cites W2002002160 @default.
- W2233573818 cites W2003407741 @default.
- W2233573818 cites W2013458015 @default.
- W2233573818 cites W2017452204 @default.
- W2233573818 cites W2019428480 @default.
- W2233573818 cites W2023001659 @default.
- W2233573818 cites W2023968025 @default.
- W2233573818 cites W2025737316 @default.
- W2233573818 cites W2026821040 @default.
- W2233573818 cites W2029077494 @default.
- W2233573818 cites W2034616099 @default.
- W2233573818 cites W2035547408 @default.
- W2233573818 cites W2036179433 @default.
- W2233573818 cites W2040912209 @default.
- W2233573818 cites W2041584190 @default.
- W2233573818 cites W2045755156 @default.
- W2233573818 cites W2048533381 @default.
- W2233573818 cites W2052528558 @default.
- W2233573818 cites W2062963505 @default.
- W2233573818 cites W2064341174 @default.
- W2233573818 cites W2065198265 @default.
- W2233573818 cites W2066610994 @default.
- W2233573818 cites W2073753053 @default.
- W2233573818 cites W2074383387 @default.
- W2233573818 cites W2079349557 @default.
- W2233573818 cites W2080102210 @default.
- W2233573818 cites W2080886544 @default.
- W2233573818 cites W2085125001 @default.
- W2233573818 cites W2088668851 @default.
- W2233573818 cites W2089820345 @default.
- W2233573818 cites W2094572710 @default.
- W2233573818 cites W2097674253 @default.
- W2233573818 cites W2098623259 @default.
- W2233573818 cites W2102671839 @default.
- W2233573818 cites W2110939566 @default.
- W2233573818 cites W2111868978 @default.
- W2233573818 cites W2113604553 @default.
- W2233573818 cites W2114933536 @default.
- W2233573818 cites W2135625048 @default.
- W2233573818 cites W2148392241 @default.
- W2233573818 cites W2150566240 @default.
- W2233573818 cites W2152043060 @default.
- W2233573818 cites W2154497460 @default.
- W2233573818 cites W2158655939 @default.
- W2233573818 cites W2159402535 @default.
- W2233573818 cites W2168955357 @default.
- W2233573818 cites W2172190142 @default.
- W2233573818 cites W2330147180 @default.
- W2233573818 cites W3007108723 @default.
- W2233573818 cites W3023613093 @default.
- W2233573818 cites W3098038125 @default.
- W2233573818 cites W3098055748 @default.
- W2233573818 cites W3098221464 @default.
- W2233573818 cites W3099852522 @default.
- W2233573818 cites W3103144563 @default.
- W2233573818 cites W3103620037 @default.
- W2233573818 cites W3103805048 @default.
- W2233573818 cites W3104372544 @default.
- W2233573818 cites W3104429358 @default.
- W2233573818 cites W3104884851 @default.
- W2233573818 cites W3105082704 @default.
- W2233573818 cites W3105139654 @default.
- W2233573818 cites W3105870208 @default.
- W2233573818 cites W3106306458 @default.
- W2233573818 cites W3106348847 @default.
- W2233573818 cites W3123020773 @default.
- W2233573818 cites W3123188609 @default.
- W2233573818 cites W3123285665 @default.
- W2233573818 cites W3125590485 @default.
- W2233573818 doi "https://doi.org/10.1093/mnras/stv1902" @default.
- W2233573818 hasPublicationYear "2015" @default.
- W2233573818 type Work @default.