发表机构
University of Manchester（曼彻斯特大学）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
利用galfind流程在NIRCam深场中构建2452个z~6.5-16.5星系样本，发现平坦UV斜率及62个高红移候选体，并公开星表与SED拟合结果。
AI 中文摘要
我们展示了由2452个恒星形成星系组成的\epochstwo\\样本，这些星系位于6.5<z_phot<16.5，是利用\galfind\\测光流程在六个最广泛使用的深空空白场\jwst/NIRCam成像巡天中约650-740平方角分范围内生成的。其中293个星系获得了光谱确认，光谱-测光红移比较得出归一化中位绝对偏差σ_NMAD=0.017，异常率η=4.3%，平均偏移⟨Δz⟩=-0.022。我们发现了34个具有“V”形SED的小红点（LRD），以及69个L型、36个T型和2个紧凑Y型褐矮星候选体，这些已从样本中移除。基准样本在z≃12.5处产生平坦的β_UV-M_UV关系，中位β_UV(M_UV=-19)=-2.32^{+0.08}_{-0.07}仅适度偏蓝，表明在最高红移处存在尘埃污染的恒星族群。一个由62个源组成的“黄金”样本在z_phot>10.5处被识别，其中约85%没有NIRSpec后续观测，包括15个z_phot>13.5的候选体，其物理尺寸范围广泛（30 pc≲r_c≲1.5 kpc），UV斜率范围-4.0≲β_UV≲-1.5。两个非常有前景的候选体脱颖而出：GS-W-4608和GN-Med-1881，它们的β_UV≲-3，莱曼α断裂颜色≳1.6星等，并有F335M和F410M探测，这增强了其高红移解的稳健性。作为我们高红移样本的补充，本次公开数据发布为社区提供了光学/近红外星表、经验PSF以及\eazypy、\bagpipes和\bdfinder\\的SED拟合结果，在即将到来的Euclid和Roman宽场成像数据时代提升了JWST测光数据的遗产价值。
英文摘要
We present the \epochstwo\ sample of $2452$ star forming galaxies at $6.5<z_{\rm phot}<16.5$ produced using the \galfind\ photometric pipeline across $\sim650-740~\mathrm{arcmin}^2$ in six of the most widely used deep, blank field \jwst/NIRCam imaging surveys. $293$ galaxies are spectroscopically confirmed and a spectroscopic--photometric redshift comparison yields a normalized median absolute deviation, $σ_{\rm NMAD}=0.017$, an $η=4.3\%$ outlier rate, and a mean offset $\langleΔz\rangle=-0.022$. We find $34$ little red dots (LRDs) with ``V--shaped'' SEDs, as well as $69$ L--type, $36$ T--type, and $2$ compact Y--type brown dwarf candidates, which we remove from our sample. The fiducial sample yields a flattening $β_{\rm UV}-M_{\rm UV}$ relation with only moderately blue median $β_{\rm UV}(M_{\rm UV}=-19)=-2.32^{+0.08}_{-0.07}$ at $z\simeq12.5$, implying dust-polluted stellar populations at the highest redshifts. A ``gold'' sample of $62$ sources are identified at $z_{\rm phot}>10.5$, $\sim85\%$ of which are without NIRSpec follow-up, including $15$ candidates at $z_{\rm phot}>13.5$ across a diverse range of proper sizes $30\,\rm pc\lesssim r_{\rm c}\lesssim1.5\,\rm kpc$ and UV slopes $-4.0\lesssimβ_{\rm UV}\lesssim-1.5$. Two very promising candidates stand out, GS-W-4608 and GN-Med-1881, with $β_{\rm UV}\lesssim-3$, $\gtrsim1.6\,\rm mag$ \lya\ break colors, and F335M and F410M detections which improve their high-redshift solution robustness. Complementary to our high-redshift sample, this public data release provides the community with optical/NIR catalogs, empirical PSFs, and \eazypy, \bagpipes, and \bdfinder\ SED fitting results, enhancing the legacy value of photometric JWST data in the upcoming era of wide-field imaging datasets with Euclid and Roman.
Comments38 pages, 11 figures, 8 tables, Submitted to ApJ
