On the occurrence of galaxy harassment
文献类型：期刊论文
| 作者 | Bialas, D; Lisker, T; Olczak, C; Spurzem, R; Kotulla, R |
| 刊名 | ASTRONOMY & ASTROPHYSICS
 |
| 出版日期 | 2015 |
| 卷号 | 576期号:0页码:A103 |
| 关键词 | galaxies: evolution galaxies: interactions galaxies: dwarf galaxies: structure galaxies: kinematics and dynamics galaxies: clusters: general |
| 通讯作者 | Bialas, D (reprint author), Heidelberg Univ, Zentrum Astron, Astron Rechen Inst, Monchhofstr 12-14, D-69120 Heidelberg, Germany. |
| 英文摘要 | Context. Tidal interactions of galaxies in galaxy clusters have been proposed as one potential explanation of the morphology-density relation at low masses. Earlier studies have shown that galaxy harassment is a suitable mechanism for inducing a morphological transformation from low-mass late-type disk galaxies to the abundant early-type galaxies. Aims. The efficiency of tidal transformation is expected to depend strongly on the orbit of a galaxy within the cluster halo. The orbit determines both the strength of the cluster's global tidal field and the probability of encounters with other cluster members. Here we aim to explore these dependencies. Methods. We use a combination of N-body simulation and Monte-Carlo method to study the efficiency of the transformation of late-type galaxies by tidal interactions on different orbits in a galaxy cluster. Additionally, we investigate the effect of an inclination between the disk of the infalling galaxy and its orbital plane. We compare our results to observational data to assess the possible relevance of such transformations for the existing cluster galaxy population. Results. We find that galaxies that entered a cluster from the outskirts are unlikely to be significantly transformed (stellar mass loss <= 6%). Closer to the cluster centre, tidal interactions are a more efficient mechanism (stellar mass loss up to 50%) for producing harassed galaxies. The inclination of the disk can reduce the mass loss significantly, yet it amplifies the thickening of the galaxy disk. Galaxies with smaller sizes on intermediate orbits are nearly unaffected by tidal interactions. The tidal influence on an infalling galaxy and the likelihood that it leads to galaxy harassment make a very stochastical process that depends on the galaxy's specific history. Conclusions. We conclude that harassment is a suitable mechanism that could explain the transformation of at least a fraction of galaxies inside galaxy clusters. However, the transformation would have to start at an early epoch in protocluster environments and continue until today, in order to result in a complete morphological transformation. |
| 学科主题 | Astronomy & Astrophysics |
| 类目[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | DWARF ELLIPTIC GALAXIES ; DIGITAL SKY SURVEY ; STANDARD STELLAR LIBRARY ; N-BODY SIMULATIONS ; VIRGO CLUSTER ; STAR-FORMATION ; EVOLUTIONARY SYNTHESIS ; SPIRAL STRUCTURE ; MODELS ; MORPHOLOGY |
| 收录类别 | SCI |
| 语种 | 英语 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/21036]  |
| 专题 | 理论物理研究所_理论物理所1978-2010年知识产出 |
| 推荐引用方式 GB/T 7714 | Bialas, D,Lisker, T,Olczak, C,et al. On the occurrence of galaxy harassment[J]. ASTRONOMY & ASTROPHYSICS,2015,576(0):A103. |
| APA | Bialas, D,Lisker, T,Olczak, C,Spurzem, R,&Kotulla, R.(2015).On the occurrence of galaxy harassment.ASTRONOMY & ASTROPHYSICS,576(0),A103. |
| MLA | Bialas, D,et al."On the occurrence of galaxy harassment".ASTRONOMY & ASTROPHYSICS 576.0(2015):A103. |
入库方式： OAI收割
来源：理论物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。