OMEGA -- OSIRIS Mapping of Emission-line Galaxies in A901/2: I.-- Survey description, data analysis, and star formation and AGN activity in the highest density regions
Ana L. Chies-Santos, Bruno Rodríguez del Pino, Alfonso Aragón-Salamanca, Steven P. Bamford, Meghan E. Gray, Christian Wolf, Asmus Böhm, David T. Maltby, Irene P… 展开作者
Ana L. Chies-Santos, Bruno Rodríguez del Pino, Alfonso Aragón-Salamanca, Steven P. Bamford, Meghan E. Gray, Christian Wolf, Asmus Böhm, David T. Maltby, Irene Pintos-Castro, Miguel Sánchez-Portal, Tim Weinzirl
We present an overview of and first results from the OMEGA survey: the OSIRIS Mapping of Emission-line Galaxies in the multi-cluster system A901/2. The ultimate goal of this project is to study star formation and AGN activity across a broad range of environments at a single redshift. Using the tuneable-filter mode of the OSIRIS instrument on GTC, we target Halpha and [NII] emission lines over a ~0.5 X 0.5 deg2 region containing the z~0.167 multi-cluster system A901/2. In this paper we describe the design of the survey, the observations and the data analysis techniques developed. We then present early results from two OSIRIS pointings centred on the cores of the A901a and A902 clusters. AGN and star-forming (SF) objects are identified using the [NII]/Halpha vs. W_Halpha (WHAN) diagnostic diagram. The AGN hosts are brighter, more massive, and possess earlier-type morphologies than SF galaxies. Both populations tend to be located towards the outskirts of the high density regions we study. The typical Halpha luminosity of these sources is significantly lower than that of field galaxies at similar redshifts, but greater than that found for A1689, a rich cluster at z~0.2. The Halpha luminosities of our objects translate into star-formation rates (SFRs) between ~0.02 and 6 Msun/yr. Comparing the relationship between stellar mass and Halpha-derived SFR with that found in the field indicates a suppression of star formation in the cores of the clusters. These findings agree with previous investigations of this multi-cluster structure, based on other star formation indicators, and demonstrate the power of tuneable filters for this kind of study.
GMP-selected dual and lensed AGNs: selection function and classification based on near-IR colors and resolved spectra from VLT/ERIS, KECK/OSIRIS, and LBT/LUCI
Keck OSIRIS AO LIRG Analysis: Feedback in the Nuclei of Luminous Infrared Galaxies
反馈在触发或淬灭恒星形成,从而驱动星系演化的作用,可以直接研究与高分辨率积分场观测。在星系合并中,激波反馈的表现尤其重要,因为在星系碰撞过程中,气体在星际介质中发生了剧烈的相互作用。作为我们在大天文台全天LIRG巡天中系统研究本地亮红外星系群的努力的一部分,我们进行了Keck OSIRIS AO LIRG分析观测活动,以空间尺度研究这些系统内部千秒差距区域的气体动力学。几十秒秒差距。与高分辨率近红外自适应光学辅助积分场观测与OSIRIS的凯克望远镜,我们采用近红外诊断,如Brg和振动激发的H2线,以量化的核恒星形成率和识别反馈与冲击分子气体在附近的21个明亮的红外星系。冲击分子气体优先出现在超亮红外系统中,但也可能在较低光度、较早的合并阶段被触发。在环核尺度上,活动星系核对加热周围的分子气体有很强的影响,尽管它们的耦合并不简单地由活动星系核的强度驱动,而是由取向、尘埃屏蔽、密度和其他因素复杂化。我们发现,核恒星的形成与合并类和减少预计的核分离。这些趋势在很大程度上与星系合并中心的合并引起的恒星暴增相一致。
MOSDEF-3D: Keck/OSIRIS Maps of the Ionized ISM in $z \sim 2$ Galaxies
Department of Physics & Astronomy, University of California, Los Angeles(加州大学洛杉矶分校物理与天文学系);Department of Physics and Astronomy, University of Kentucky(肯塔基大学物理与天文学系);Department of Physics and Astronomy, University of California Davis(加州大学戴维斯分校物理与天文学系);Department of Astronomy & Astrophysics, University of California, San Diego(加州大学圣地亚哥分校天文与天体物理学系);Leiden Observatory, Leiden University(莱顿大学莱顿天文台);Department of Physics & Astronomy, University of California, Riverside(加州大学河滨分校物理与天文学系)
GLACE survey: OSIRIS/GTC Tuneable Filter H$α$ imaging of the rich galaxy cluster ZwCl 0024.0+1652 at z = 0.395. Part I -- Survey presentation, TF data reduction techniques and catalogue
在0 $\lesssim$ z $\lesssim$ 1处的星系团核心主要是静止的早型星系,而场区主要是恒星形成的晚型星系。星系的性质,特别是恒星形成(SF)的能力,在它们落入过密区域时会发生变化。理解这种演化的关键问题是SF的截断如何与形态学转变和负责任的物理机制相联系。银河星系团演化巡天正在进行一项关于星系团代表性样本中星系特性(SF、AGN、形态)随环境变化的研究。发射线星系(ELG)的深度调查正在进行中,映射一组光学线([OII],[OIII],H $β$和H $α$ /[NII])在几个星系团在z $\sim$ 0.40,0.63和0.86。GLACE使用OSIRIS/GTC的可调谐滤波器(TF),应用TF层析成像技术:对于每条线,通过TF拍摄一组不同波长的图像,以覆盖数千km/s的静止帧速度范围。第一个GLACE结果靶向在z = 0.395的簇ZwCl 0024.0+1652中的H $α$ /[NII]系,覆盖$\sim$ 2 $\times$ r $_{vir}$。我们讨论的技术设计来处理TF层析成像观测产生的目录H $α$发射器的174个独特的集群源下降到SFR低于1 M $_{\odot}$ /年。AGN群体使用不同的诊断进行区分,发现是$\sim$,占ELG群体的37%。中位SFR为1.4 M $_{\odot}$ /年。我们研究了ELG的空间分布,证实了红移空…
Young Star Clusters In The Circumnuclear Region Of NGC 2110
近红外高分辨率观测显示,在塞弗特1号NGC 2110的活动星系核(AGN)周围有星团,在其核周围有一个90 x 35 pc的冲击气体物质棒。这些都是第一次看到我们的成像和气体运动学的中央100 pc与凯克OSIRIS仪器与自适应光学。这些星团中的每一个都比靠近银河系中心的拱门星团亮2-3倍。核心恒星形成率(SFR)为0.3 M $_\odot$ /年。光电离气体(He I)动力学意味着封闭质量为3-4 x 10 $^8$ M $_\odot$。这些观测结果证明了活动星系核反馈(触发大质量星团中的恒星形成)与由此产生的恒星风(和SNe)之间的物理联系,后者导致观测到的[Fe II]发射并为黑洞提供能量。
Cosmic Duets II. Growth and accretion in Gaia Multi-Peak dual AGN at Cosmic Noon
University of Trento(特伦托大学);INAF – Osservatorio Astrofisico di Arcetri(意大利国家天体物理研究所阿切特里天文台);Institute of Space Sciences (ICE, CSIC)(空间科学研究所(西班牙高等科研理事会));INAF – Osservatorio Astronomico di Brera(意大利国家天体物理研究所布雷拉天文台);Institut d’Astrophysique de Paris(巴黎天体物理研究所);INAF - Istituto di Astrofisica e Planetologia Spaziali(意大利国家天体物理研究所天文与行星物理学研究所);Max Planck Institute for extraterrestrial Physics(马克斯·普朗克地外物理研究所);Centro de Astrobiología (CAB), CSIC–INTA(天体生物学中心(西班牙高等科研理事会-国家航空航天技术研究所))