论文标题
Borg调查中确定的$ Z \ SIM9-10 $ sim9-10 $的尺寸
The Sizes of $z\sim9-10$ Galaxies Identified in the BoRG Survey
论文作者
论文摘要
Redshift $ z = 9--10 $对象选择是哈勃太空望远镜成像功能的有效限制，即使在Spitzer确认时也是如此。如果只有几个光度计数据点可用，那么根据这些J和H波段图像中的形态添加标准会很有吸引力。 可以通过视觉检查，大小标准或替代形态计量学来做到这一点。我们探索了Borg $ Z \ SIM9 $和$ Z \ sim10 $候选星系的审查样本以及Morishita+（2018）拒绝的对象，以探索Z = 9-10候选人选择中尺寸标准的实用性。严格的PSF校正有效半径标准（$ r_e <0 \ farcs3 $）将导致拒绝65-70 \％的interlopers在视觉上被Morishita+视觉拒绝。它也可以根据Mason+（2015）发光功能从BORG选定的样本中删除最多$ \ sim20 $ \％的bright最亮（$ l >> l^*$）Z = 9或10个候选人，假设Holwerda+（2015）$ z \ sim9 $ size9 $ size-size-size-luminsusity residation。我们认为，包括大小约束代替视觉检查，可以在例如欧几里得或HST档案成像，并了解可能会错过一些最聪明的（$ l >> l^*$）候选人。 Morishita+（2018）发现的候选人的大小遵循明亮星系的$ z \ sim9 $的预期尺寸分布，与shibuya+（2015）和单个对象的lognormals一致。两名候选人显示高星形形成表面密度（$σ_{sfr}> 25 m_ \ odot/kpc^2 $），所有功绩均进一步研究和随访观测值。
Redshift $z=9--10$ object selection is the effective limit of Hubble Space Telescope imaging capability, even when confirmed with Spitzer. If only a few photometry data points are available, it becomes attractive to add criteria based on their morphology in these J- and H-band images. One could do so through visual inspection, a size criterion, or alternate morphometrics. We explore a vetted sample of BoRG $z\sim9$ and $z\sim10$ candidate galaxies and the object rejected by Morishita+ (2018) to explore the utility of a size criterion in z=9-10 candidate selection. A stringent, PSF-corrected effective radius criterion ($r_e<0\farcs3$) would result in the rejection of 65-70\% of the interlopers visually rejected by Morishita+. It may also remove up to $\sim20$\% of bona-fide brightest ($L>>L^*$) z=9 or 10 candidates from a BoRG selected sample based on the Mason+ (2015) luminosity functions, assuming the Holwerda+ (2015) $z\sim9$ size-luminosity relation. We argue that including a size constraint in lieu of a visual inspection may serve in wide-field searches for these objects in e.g. EUCLID or HST archival imaging with the understanding that some brightest ($L>>L^*$) candidates may be missed. The sizes of the candidates found by Morishita+ (2018) follow the expected size distribution of $z\sim9$ for bright galaxies, consistent with the lognormal in Shibuya+ (2015) and single objects. Two candidates show high star-formation surface density ($Σ_{SFR} > 25 M_\odot/kpc^2$) and all merit further investigation and follow-up observations.
