论文标题
尘土飞扬的JWST明确星系
Dusty winds clear JWST super-early galaxies
论文作者
论文摘要
JWST发现了许多超级美好的（红移$ z> 10 $），蓝色星系需要这些系统基本上没有尘土，尽管它们具有较大的恒星群体。一个可能的解释是，尘埃被辐射驱动的流出疏散。我们通过得出Eddington Ratio $λ_e= l _ {\ rm bol}/l_ {e} $来检验这一假设，其中$ l _ {\ rm bol} $是由星形成的授予量度亮度，可能是由134 $ 6.5 $ 6.5 <z <z <z <16 $ 6.54 $ 6.5 <z <z <16 $。我们发现$λ_e$和Dust UV光学深度，$τ_{1500} \proptoλ_e^{ - 0.63} $之间的强烈反相关；另外，$λ_e$随着红移而增加。我们确认超过特定星形构成速率的星系$ {\ rm ssfr}> 13 \，\ rm gyr^{ - 1} $开发出强大的外流，从其灰尘清除银河系。在三个超级系统中，Alma Dust Continuum非检测支持了这一结果。
The JWST discovery of a number of super-early (redshift $z>10$), blue galaxies requires these systems to be essentially dust-free in spite of their large stellar masses. A possible explanation is that dust is evacuated by radiatively-driven outflows. We test this hypothesis by deriving the Eddington ratio $λ_E=L_{\rm bol}/L_{E}$, where $L_{\rm bol}$ is the bolometric luminosity produced by star-formation and possible black hole accretion, for 134 galaxies at $6.5< z <16$. We find a strong anti-correlation between $λ_E$ and dust UV optical depth, $τ_{1500} \propto λ_E^{-0.63}$; also, $λ_E$ increases with redshift. We confirm that galaxies exceeding a specific star formation rate ${\rm sSFR} > 13\, \rm Gyr^{-1}$ develop powerful outflows clearing the galaxy from its dust. This result is supported by ALMA dust continuum non-detections in three super-early systems.
