GA-NIFS: High number of dual active galactic nuclei at z~3
Michele Perna, Santiago Arribas, Isabella Lamperti, Chiara Circosta, Elena Bertola, Pablo G. Pérez-González, Francesco D'Eugenio, Hannah Übler, Giovanni Cresci,… 展开作者
Michele Perna, Santiago Arribas, Isabella Lamperti, Chiara Circosta, Elena Bertola, Pablo G. Pérez-González, Francesco D'Eugenio, Hannah Übler, Giovanni Cresci, Marta Volonteri, Filippo Mannucci, Roberto Maiolino, Bruno Rodríguez Del Pino, Andrew J. Bunker, Stéphane Charlot, Chris J. Willott, Stefano Carniani, Torsten Böker, Mirko Curti, Gareth Jones, Nimisha Kumari, Madeline A. Marshall, Aayush Saxena, Jan Scholtz, Giacomo Venturi, Joris Witstok
Merger events can trigger gas accretion onto supermassive black holes (SMBHs) located at the centre of galaxies, and form close pairs of AGN. The fraction of AGN in pairs offers critical insights into the dynamics of galaxy interactions, SMBH growth, and their co-evolution with host galaxies. However, the identification of dual AGN is difficult, as it requires high-quality spatial and spectral data; hence, only very few pairs have been found in the distant Universe so far. This study aims to provide a first observational estimate of the fraction of dual AGN at 2<z<6 by analysing a sample of 16 AGN observed with JWST/NIRSpec IFS, as part of the GA-NIFS survey. For two AGN in our sample, we also incorporate archival VLT/MUSE data to expand the search area. We searched for nearby companion galaxies and emission-line sources within the ~20x20 kpc field of view of the NIRSpec data cubes, extending up to ~50 kpc using the MUSE data cubes. We analysed the spectra of such emitters to determine their physical and kinematic properties. We report the serendipitous discovery of a triple AGN and four dual AGN (two of which considered as candidates), with projected separations in the range 3-28 kpc. Their AGN classification is mainly based on standard optical emission line flux ratios, as observed with JWST/NIRSpec, and is complemented with additional multi-wavelength diagnostics. The identification of these 3-5 multiple AGN out of the 16 AGN systems in GA-NIFS (i.e. ~20-30%) suggests they might be more common than previously thought based on other observational campaigns. Moreover, our inferred fraction of dual AGN moderately exceeds predictions from cosmological simulations that mimic our observational criteria (~10%). This work highlights the exceptional capabilities of NIRSpec for detecting distant dual AGN, and prompts new investigations to constrain their fraction across cosmic time.
GA-NIFS: Powerful and frequent outflows in moderate-luminosity active galactic nuclei at $z\sim3-6$
Scuola Normale Superiore（高等师范学院）；INAF – Osservatorio Astrofisico di Arcetri（意大利国家天体物理研究所阿切特里天文台）；Institut de Radioastronomie Millimétrique (IRAM)（毫米波射电天文研究所）；European Space Agency（欧洲空间局）；Centro de Astrobiología (CAB), CSIC-INTA（西班牙国家航空航天技术研究院与最高科学研究理事会天文生物学中心）；Department of Physics, University of Oxford（牛津大学物理系）；Sorbonne Université, CNRS, UMR 7095, Institut d’Astrophysique de Paris（索邦大学、法国国家科学研究中心巴黎天体物理研究所）；Kavli Institute for Cosmology, University of Cambridge（剑桥大学卡弗里宇宙学研究所）
GA-NIFS: high prevalence of dusty and metal-enriched outflows in massive and luminous star-forming galaxies at $z\sim3-9$
Centro de Astrobiología (CAB), CSIC–INTA（天体生物学中心）；Università di Firenze（佛罗伦萨大学）；INAF - Osservatorio Astrofisico di Arcetri（国家天体物理研究所-阿尔切特里天文台）；Department of Physics, University of Oxford（牛津大学物理系）；Scuola Normale Superiore（比萨高等师范学院）；Sorbonne Université, CNRS, UMR 7095, Institut d’Astrophysique de Paris（索邦大学）；Kavli Institute for Cosmology, University of Cambridge（剑桥大学卡弗里宇宙学研究所）；Cavendish Laboratory - Astrophysics Group, University of Cambridge（剑桥大学卡文迪许实验室）
GA-NIFS: AGN activity in a Lyα emitter within a triple-AGN system anchored by a passive galaxy at z=3
Centro de Astrobiología (CAB), CSIC–INTA（天体生物学中心（CAB），西班牙国家航空航天技术研究所与西班牙国家科学研究委员会联合）；Kavli Institute for Cosmology, University of Cambridge（剑桥大学卡弗里宇宙学研究所）；Cavendish Laboratory - Astrophysics Group, University of Cambridge（剑桥大学卡文迪许实验室天体物理组）；Department of Physics, University of Oxford（牛津大学物理系）；Scuola Normale Superiore（比萨高等师范学院）；Sorbonne Université, CNRS, UMR 7095, Institut d’Astrophysique de Paris（索邦大学，法国国家科学研究中心，UMR 7095，巴黎天体物理研究所）；Department of Physics and Astronomy, University College London（伦敦大学学院物理与天文系）
Star clusters as tracers of galactic nuclei properties
我们提出了一系列的$N$体模拟代表的星系核和它的恒星内容的演变，在一个接近一对一的表示。这套模拟的目的是揭示核团（NC），超大质量黑洞（SMBH）和它们所包含的星系核之间的相互作用。我们模拟的星系质量从几倍$10^8$到$10^{11}$ M $_\odot$，在它们的核中有一些球状星团，在某些情况下，还有一个中央SMBH。
Merger-driven Fueling of Active Galactic Nuclei: Six Dual and Offset Active Galactic Nuclei Discovered with Chandra and Hubble Space Telescope Observations
