The assembly of stellar haloes in massive Early-Type Galaxies

被引：0

作者：

Buitrago, F. ^{[1
,2
]}

机构：

[1] Univ Lisbon, Inst Astrofis & Ciencias Espaco, OAL, P-1349018 Lisbon, Portugal

[2] Univ Lisbon, Fac Ciencias, Dept Fis, Edificio C8, P-1749016 Lisbon, Portugal

来源：

FORMATION AND EVOLUTION OF GALAXY OUTSKIRTS | 2016年 / 11卷 / S321期

关键词：

galaxies: elliptical and lenticular; cD; galaxies: evolution; galaxies: halos;

D O I：

10.1017/S1743921316011558

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Massive (M-stellar >= 5x10(10) M-circle dot) Early-Type Galaxies (ETGs) must build an outer stellar envelope over cosmic time in order to account for their remarkable size evolution. This is similar to what occurs to nearby Late-Type Galaxies (LTGs), which create their stellar haloes out of the debris of lower mass systems. We analysed the outer parts of massive ETGs at z < 1 by exploiting the Hubble Ultra Deep Field imaging. These galaxies store 10-30% of their stellar mass at distances 10 < R/kpc < 50, in contrast to the low percentages (< 5%) found for LTGs. We find evidence for a progressive outskirt development with redshift driven solely via merging.

引用

页码：321 / 323

页数：3

共 13 条

[1]

Buitrago F., 2016, ARXIV160201846

[2] SINFONI/VLT 3D spectroscopy of massive galaxies: evidence of rotational support at z ∼ 1.4 [J].