The SAMI galaxy survey: a range in S0 properties indicating multiple formation pathways

被引：33

作者：

Deeley, Simon ^{[1
]}

Drinkwater, Michael J. ^{[1
]}

Sweet, Sarah M. ^{[1
,2
,3
]}

Diaz, Jonathan ^{[4
]}

Bekki, Kenji ^{[4
]}

Couch, Warrick J. ^{[2
]}

Forbes, Duncan A. ^{[2
]}

Bland-Hawthorn, Joss ^{[5
]}

Bryant, Julia J. ^{[3
,5
,6
]}

Croom, Scott ^{[3
,5
]}

Cortese, Luca ^{[3
,4
]}

Lawrence, Jon S. ^{[7
]}

Lorente, Nuria ^{[8
]}

Medling, Anne M. ^{[9
,10
]}

Owers, Matt ^{[11
,12
]}

Richards, Samuel N. ^{[13
]}

van de Sande, Jesse ^{[3
,5
]}

机构：

[1] Univ Queensland, Sch Math & Phys, Brisbane, Qld 4072, Australia

[2] Swinburne Univ, Ctr Astrophys & Supercomp, Hawthorn, Vic 3122, Australia

[3] Ctr Excellence All Sky Astrophys 3 Dimens ASTRO 3, ARC, Canberra, ACT, Australia

[4] Univ Western Australia, Int Ctr Radio Astron Res, 35 Stirling Highway, Crawley, WA 6009, Australia

[5] Univ Sydney, Sch Phys, Sydney Inst Astron, Sydney, NSW 2006, Australia

[6] Univ Sydney, Sch Phys, AAO USydney, Australian Astron Opt, Sydney, NSW 2006, Australia

[7] Macquarie Univ, Australian Astron Opt Macquarie, N Ryde, NSW 2109, Australia

[8] Macquarie Univ, Fac Sci & Engn, AAO MQ, 105 Delhi Rd, N Ryde, NSW 2113, Australia

[9] Australian Natl Univ, Res Sch Astron & Astrophys, Canberra, ACT 2611, Australia

[10] Univ Toledo, Ritter Astrophys Res Ctr, 2801 W Bancroft St, Toledo, OH 43606 USA

[11] Macquarie Univ, Dept Phys & Astron, N Ryde, NSW 2109, Australia

[12] Macquarie Univ, Astron Astrophys & Astrophoton Res Ctr, Sydney, NSW 2109, Australia

[13] NASA, SOFIA Sci Ctr, USRA, Ames Res Ctr, Bldg N232,M-S 232-12,POB 1, Moffett Field, CA 94035 USA

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2020年 / 498卷 / 02期

基金：

澳大利亚研究理事会;

关键词：

galaxies: elliptical and lenticular; cD; galaxies: evolution; galaxies: kinematics and dynamics; ANGULAR-MOMENTUM; SAURON PROJECT; STAR-FORMATION; EVOLUTION; CLUSTERS; ORIGIN; KINEMATICS; BULGE; FIELD; TRANSFORMATION;

D O I：

10.1093/mnras/staa2417

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

It has been proposed that S0 galaxies are either fading spirals or the result of galaxy mergers. The relative contribution of each pathway and the environments in which they occur remain unknown. Here, we investigate stellar and gas kinematics of 219 S0s in the SAMI Survey to look for signs of multiple formation pathways occurring across the full range of environments. We identify a large range of rotational support in their stellar kinematics, which correspond to ranges in their physical structure. We find that pressure-supported S0s with v/sigma below 0.5 tend to be more compact and feature misaligned stellar and gas components, suggesting an external origin for their gas. We postulate that these S0s are consistent with being formed through a merger process. Meanwhile, comparisons of ellipticity, stellar mass, and Sersic index distributions with spiral galaxies show that the rotationally supported S0s with v/sigma above 0.5 are more consistent with a faded spiral origin. In addition, a simulated merger pathway involving a compact elliptical and gas-rich satellite results in an S0 that lies within the pressure-supported group. We conclude that two S0 formation pathways are active, with mergers dominating in isolated galaxies and small groups, and the faded spiral pathway being most prominent in large groups (10(13) < M-halo < 10(14)).

引用

页码：2372 / 2383

页数：12

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