The environmental dependence of the stellar mass-size relation in STAGES galaxies
David T. Maltby, Alfonso Aragón-Salamanca, Meghan E. Gray, Marco Barden, Boris Haeussler, Christian Wolf, Chien Y. Peng, Knud Jahnke, Daniel H. McIntosh, Asmus … 展开作者
David T. Maltby, Alfonso Aragón-Salamanca, Meghan E. Gray, Marco Barden, Boris Haeussler, Christian Wolf, Chien Y. Peng, Knud Jahnke, Daniel H. McIntosh, Asmus Boehm, Eelco van Kampen
We present the stellar mass-size relations for elliptical, lenticular, and spiral galaxies in the field and cluster environments using HST/ACS imaging and data from the Space Telescope A901/2 Galaxy Evolution Survey (STAGES). We use a large sample of ~1200 field and cluster galaxies, and a sub-sample of cluster core galaxies, and quantify the significance of any putative environmental dependence on the stellar mass-size relation. For elliptical, lenticular, and high-mass (log M*/M_sun > 10) spiral galaxies we find no evidence to suggest any such environmental dependence, implying that internal drivers are governing their size evolution. For intermediate/low-mass spirals (log M*/M_sun < 10) we find evidence, significant at the 2-sigma level, for a possible environmental dependence on galaxy sizes: the mean effective radius a_e for lower-mass spirals is ~15-20 per cent larger in the field than in the cluster. This is due to a population of low-mass large-a_e field spirals that are largely absent from the cluster environments. These large-a_e field spirals contain extended stellar discs not present in their cluster counterparts. This suggests the fragile extended stellar discs of these spiral galaxies may not survive the environmental conditions in the cluster. Our results suggest that internal physical processes are the main drivers governing the size evolution of galaxies, with the environment possibly playing a role affecting only the discs of intermediate/low-mass spirals.
Environmental effects in stellar mass gravitational wave sources I: Expected fraction of signals with significant dephasing in the dynamical and AGN channels
The Zurich Environmental Study (ZENS) of Galaxies in Groups along the Cosmic Web. II. Galaxy Structural Measurements and the Concentration of Morphologically Classified Satellites in Diverse Environments
The Zurich Environmental Study of Galaxies in Groups along the Cosmic Web. III. Galaxy Photometric Measurements and the Spatially-Resolved Color Properties of Early- and Late-Type Satellites in Diverse Environments
Environmental Sculpting of Galaxy Structure at Fixed Stellar Mass: A Multi-Scale Analysis Across Cosmic Time using 3 Million HSC Galaxies
University of Washington(华盛顿大学);DiRAC Institute, University of Washington(华盛顿大学迪拉克研究所);eScience Institute, University of Washington(华盛顿大学eScience研究所);Department of Astronomy and Astrophysics, University of California, Santa Cruz(加州大学圣克鲁兹分校天体物理与天文学系);Yale Center for Astronomy and Astrophysics(耶鲁天体物理中心);Department of Physics, Yale University(耶鲁大学物理系);Department of Physics, California Polytechnic State University(加州州立理工大学物理系);Waseda Institute for Advanced Study (WIAS), Waseda University(早稻田大学高等研究院)
Galaxy formation in the Planck cosmology - IV. Mass and environmental quenching, conformity and clustering
我们在Henriques et al.(2015)的星系形成模拟中研究了恒星形成的猝灭随红移、环境和恒星质量的变化,该模拟在两个千禧年模拟中实现了慕尼黑半解析模型(L-GALAXIES)的更新版本,并将其扩展到普朗克宇宙学。在这个模型中,大质量星系被活动星系核的反馈淬灭,这取决于黑洞和热气体的质量,因此间接地取决于恒星的质量。此外,任何质量的卫星星系都可以通过气体的冲压压力或潮汐剥离以及通过抑制气体流入而熄灭。这种组合的过程产生淬火效率,这取决于恒星质量,主机晕质量,环境密度,距离组中心和组中心星系性质的方式同意定性与观察。一些差异仍然存在于密集的区域和靠近群体中心的地方,那里的淬火似乎仍然太有效。此外,虽然大质量星系的平均恒星年龄与观测结果一致,但假设的活动星系核反馈模型允许在后期有太多的恒星形成。活动星系核的反馈和环境效应在密度较高的环境中更强,这一事实导致了中心星系和卫星星系的淬灭之间的相关性,这大致再现了晕内观察到的一致性趋势。
Environmental dependence of galaxy properties in the southern GAMA regions
Indian Space Research Organisation(印度空间研究组织);National Centre for Nuclear Research(国家核研究中心);University of the Witwatersrand(威特沃特斯兰德大学);The University of Western Australia(西澳大利亚大学);Jagiellonian University(雅盖隆大学);University of KwaZulu-Natal(夸祖鲁-纳塔尔大学)
The LEGA-C of nature and nurture in stellar populations of galaxies at z~0.6-1.0: D4000 and H-delta reveal different assembly histories for quiescent galaxies in different environments
星系演化是由各种物理过程驱动的,这些物理过程预计在宇宙时间的不同暗物质晕和环境下以不同的速率进行。这种演化的记录保存在星系恒星星族中,我们可以使用吸收线光谱学来访问。本文利用大型LEGA-C巡天(DR 3)研究了COSMOS场中z~0.6-1.0的环境和恒星质量对恒星星族的影响。利用LEGA-C的统计能力和深度,我们揭示了在z~0.6-1.0的大质量星系群(M>10^10 M $_{\odot}$)的恒星质量与环境2D空间上D4000和H-δ等效宽度(EW)分布的显著梯度。D4000和H-delta EW主要取决于恒星质量,但在固定恒星质量时也取决于环境。通过将样本分为中心和卫星,并在恒星形成星系和静止星系方面,我们揭示了D4000和H-三角洲EW控制恒星质量时的显着环境趋势是由静止星系驱动的。无论是中心星系还是卫星星系,恒星形成星系都显示出D4000和H-δ EW,这些EW强烈依赖于它们的恒星质量,并且在0.6<z<1.0时完全独立于环境。卫星星系所看到的环境趋势完全是由仅适用于静止星系的趋势驱动的,再加上固定恒星质量下静止部分的强烈环境依赖性。我们的研究结果与最近的模拟预测一致,模拟预测指出大质量星系首先在超密度或最紧凑的暗物质晕中形成。
Resolution-independent modeling of environmental effects in semi-analytic models of galaxy formation that include ram-pressure stripping of both hot and cold gas
卫星星系中恒星形成的猝灭现象在大范围的暗物质晕质量和星系环境中被观测到。在最近的Guo et al(2011)和Fu et al(2013)半解析+N体模型中,卫星星系的气体环境受其所在的暗物质次晕的性质控制。这个数量取决于N体模拟的分辨率,导致在高分辨率和低分辨率模拟中淬灭卫星的发散分数。在这里,我们将一个分析模型,以跟踪低于分辨率限制的subhaloes。我们证明,我们然后获得更好的收敛结果之间的千年I和II模拟,特别是在大规模的晕($\rm log M_{halo}=[14,15]$)的卫星。我们还包括一个新的物理模型,在卫星星系的冷气体的冲压压力剥离。然而,我们发现非常明显的差异与观测到的趋势淬火卫星星系分数作为恒星质量的函数在固定的晕质量。在固定的晕质量,猝灭的卫星的分数不依赖于模型中的恒星质量,但在数据中的质量强烈增加。除了对低质量被动卫星的过度预测外,模型还预测了太少的低恒星质量的淬灭中心星系,因此重现淬灭部分的问题不仅仅是环境原因。为了解决这些问题,显然需要进一步改进对调节星系恒星形成历史的气体物理过程的处理。
Stellar Bars in Jellyfish Galaxies: Statistical Insights into the Combined Role of Bars and Environment
Universidade Federal do Rio de Janeiro(里约热内卢联邦大学);Universidad Nacional Autónoma de México, Instituto de Radioastronomía y Astrofísica(墨西哥国立自治大学,射电天文与天体物理研究所);Universidad Técnica Federico Santa María(费德里科·Santa María技术大学)
Quantifying Environmental Effects on Galaxy Properties using Non-spherical Voids Identified from SDSS DR7
Shanghai Jiao Tong University(上海交通大学);National Astronomical Observatories, Chinese Academy of Sciences(中国科学院国家天文台);University of Chinese Academy of Sciences(中国科学院大学)
Millicharged Particle Production During Late-Stage Stellar Evolution
Istituto Nazionale di Fisica Nucleare (INFN), Sezione di Napoli(意大利国家核物理研究所(INFN)那不勒斯分部);Deutsches Elektronen-Synchrotron DESY(德国电子同步加速器中心 (DESY));SLAC National Accelerator Laboratory(SLAC国家加速器实验室);University of Hawai’i(夏威夷大学);Dipartimento di Fisica e Astronomia, Università degli Studi di Padova(帕多瓦大学物理与天文学系);Istituto Nazionale di Fisica Nucleare (INFN), Sezione di Padova(意大利国家核物理研究所(INFN)帕多瓦分部)