首页> 外文期刊>The Astrophysical journal >THE LUMINOSITY-SIZE AND MASS-SIZE RELATIONS OF GALAXIES OUT TO z ~ 3
【24h】

THE LUMINOSITY-SIZE AND MASS-SIZE RELATIONS OF GALAXIES OUT TO z ~ 3

机译:z〜3范围内星系的光度大小和质量大小关系

获取原文
获取原文并翻译 | 示例
           

摘要

The luminosity-size and mass-size distributions of galaxies out to z ~ 3 are presented. We use very deep near-infrared images of the Hubble Deep Field-South in the J_s, H, and K_s bands, taken as part of FIRES at the VLT, to follow the evolution of the optical rest-frame sizes of galaxies. For a total of 168 galaxies with K_(s,AB) ≤23.5, we find that the rest-frame V-band sizes r_(e,V) of luminous galaxies ( ~ 2 x 10~(10) h~(-2) solar luminosity) at 2 < z < 3 are 3 times smaller than for equally luminous galaxies today. In contrast, the mass-size relation has evolved relatively little: the size at mass ~ 2 x 10~(10) h~(-2) solar mass has changed by 20% (+-20%) since z ~ 2.5. Both results can be reconciled by the fact that the stellar M/L ratio is lower in the luminous high-z galaxies than in nearby ones because they have young stellar populations. The lower incidence of large galaxies at z ~3 seems to reflect the rarity of galaxies with high stellar mass.
机译:给出了z〜3范围内星系的光度大小和质量大小分布。我们使用J_s,H和K_s波段哈勃深场南的非常深的近红外图像(作为VLT FIRES的一部分)来跟踪星系光学静止帧大小的演变。对于总共168个K_(s,AB)≤23.5的星系,我们发现发光星系(〜2 x 10〜(10)h〜 (-2)太阳光度)在2 〜2 x 10〜(10)h〜(-2)太阳质量的尺寸已变化20%(+ -20%)。 〜2.5。发光的高z星系的恒星M / L比比附近的恒星M / L低,因为它们具有年轻的恒星种群,这两个结果可以得到证实。在z〜3处大星系的发生率较低似乎反映出恒星质量较高的星系的稀有性。

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号