We present the results of a multiwavelength study of the nearby dwarf galaxy DDO 53 - a relatively isolated member of the M 81 group. We analyse the atomic and ionised gas kinematics (based on the observations with Fabry-Perot interferometer in H$α$ line and archival data in HI 21 cm line), distribution, excitation and oxygen abundance of the ionised gas (based on the long-slit and integral-field spectroscopy and on imaging with narrow-band filters), and their relation with the young massive stars (based on archival HST data). We detect a faint 2-kpc sized supershell of ionised gas surrounding the galaxy. Most probably, this structure represents a large-scale gas outflow, however it could be also created by the ionising quanta leaking from star-forming regions to the marginally detected atomic hydrogen surrounding the galactic disc. We analyse the properties of the anomalous HI in the north part of the galaxy and find that its peculiar kinematics is also traced by ionised gas. We argue that this HI feature is related to the accreting gas cloud captured from the intergalactic medium or remaining after the merger event occurred >1 Gyr ago. The infalling gas produces shocks in the interstellar medium and could support the star formation activity in the brightest region in DDO 53.
A Redshift Survey of the Nearby Galaxy Cluster Abell 2199: Comparison of the Spatial and Kinematic Distributions of Galaxies with the Intracluster Medium
Active Galactic Nuclei and STaR fOrmation in Nearby Galaxies (AGNSTRONG). II: Results for Jetted Type-I AGNs with Strong Ionized Gas Outflows
University of Science and Technology of China(中国科学技术大学);Faculty of Physics and Engineering Physics, University of Science, Ho Chi Minh City(越南国立大学科学大学物理与工程物理学院);Vietnam National University, Ho Chi Minh City(越南国立大学胡志明市分校)
Thermal Pressure in the Cold Neutral Medium of Nearby Galaxies
动力学和热过程调节多相星际介质(ISM)的结构,并最终确定星系如何通过恒星形成演化。因此,为了约束ISM模型并更好地理解这些过程的相互作用,测量扩散的中性气体的热压力($P_{\rm th}$)是非常有意义的。结合[C II] 158 $μ$ m,HI和CO数据从31个星系中选择的Herschel KINGFISH样本,我们已经测量了534个主要原子区域的热压,典型的尺寸为$\sim$ 1千秒差距。我们发现在$P_{\rm th}/k\sim10^3-10^5$ K cm $^{-3}$范围内的热压力分布。对于一个子样本的地区的条件相似的扩散,中性气体在银河系平面,我们发现的热压力,遵循对数正态分布的中值为$P_{\rm th}/k\approx3600$ K cm $^{-3}$。这些结果与使用其他观测方法测量的热压力是一致的。我们发现,$P_{\rm th}$增加辐射场强度和恒星形成活动,从气体加热和恒星形成率之间的密切联系所预期的。我们的热压力测量落在该政权的两相ISM与冷,暖中性介质可以存在于压力平衡。最后,我们发现,扩散气体的中平面的热压力是约$\sim30$ %的垂直重量的覆盖ISM,符合流体动力学模拟的结果自我调节恒星形成的星系盘。
Duration and properties of the embedded phase of star formation in 37 nearby galaxies from PHANGS-JWST
Zentrum für Astronomie der Universität Heidelberg(海德堡大学天文中心);Cosmic Origins Of Life (COOL) Research DAO(生命宇宙起源(COOL)研究DAO);Kavli Institute for Particle Astrophysics & Cosmology, Stanford University(斯坦福大学卡弗里粒子天体物理与宇宙学研究所);INAF — Osservatorio Astrofisico di Arcetri(意大利国家天体物理研究所阿切特里天文台);European Southern Observatory(欧洲南方天文台);Department of Physics, University of Arkansas(阿肯色大学物理系);Université Côte d’Azur, Observatoire de la Côte d’Azur, CNRS, Laboratoire Lagrange(蔚蓝海岸大学、蔚蓝海岸天文台、法国国家科学研究中心拉格朗日实验室);Department of Astronomy, The Ohio State University(俄亥俄州立大学天文学系)
Caught in the act: interaction-driven evolution in the nearby compact galaxy group Roberts Quartet (SCG0018-4854)
Indian Institute of Astrophysics(印度天体物理研究所);Department of Physics, Pondicherry University(本地治里大学物理系);Department of Physics, University of Allahabad(阿拉哈巴德大学物理系)
Characterizing the interplay between Galactic star formation and ionization feedback with PRIMA
Aix Marseille Univ, CNRS, CNES, LAM(艾克斯马赛大学);Institut Universitaire de France(法国高等研究院);Universidad de Chile(智利大学);National Astronomical Research Institute of Thailand (NARIT)(泰国国家天文研究所);National Centre for Nuclear Research(国家核研究中心);Aix Marseille Univ, CNRS, LIS(艾克斯马赛大学);National Astronomical Observatory of Japan(日本国立天文台);Kyushu University(九州大学);Physical Research Laboratory(物理研究实验室);Indian Institute of Technology Gandhinagar(甘地纳加尔印度理工学院);Yunnan University(云南大学);Queen’s University(女王大学);Canada-France-Hawaii Telescope(加拿大-法国-夏威夷望远镜)
Interplay between Escaping Cosmic Rays and Interstellar Medium: Driving of Galactic Winds and Shaping the Local Proton Spectrum
Institute for Cosmic Ray Research, The University of Tokyo(东京大学宇宙射线研究所);Department of Physics, Graduate School of Science, Nagoya University(名古屋大学理学研究科物理学系)
The Multi-phase HI of the Milky Way and Nearby Galaxies
Laboratoire de Physique de l’Ecole normale supérieure, ENS, Université PSL, CNRS, Sorbonne Université, Université Paris-Diderot, Sorbonne Paris Cité, Observatoire de Paris(巴黎高等师范学院物理实验室,ENS,PSL大学,CNRS,索邦大学,巴黎第七大学,索邦巴黎城,巴黎天文台);Macquarie University(麦考瑞大学);Indian Institute of Technology Indore(印度理工学院印多尔分校);Indian Institute of Astrophysics(印度天体物理研究所);Stanford University(斯坦福大学);University of Tasmania(塔斯马尼亚大学);Université Paris-Saclay, Université Paris Cité, CEA, CNRS, AIM(巴黎萨克雷大学,巴黎西岱大学,CEA,CNRS,AIM);University of British Columbia(不列颠哥伦比亚大学);National Research Council Canada(加拿大国家研究委员会);Korea Astronomy and Space Science Institute(韩国天文学与空间科学研究所);University of Science and Technology(科学技术大学);The Australian National University(澳大利亚国立大学);Space Telescope Science Institute(太空望远镜科学研究所);University of Wisconsin–Madison(威斯康星大学麦迪逊分校);Indiana University(印第安纳大学);Columbia University(哥伦比亚大学);Indian Institute of Science(印度科学学院);California State University, Chico(加州州立大学奇科分校)
Resurging from the ashes: A spectral study of seven candidate revived radio fossils in nearby low-mass galaxy clusters
Istituto Nazionale di Astrofisica (INAF) - Istituto di Radioastronomia (IRA)(意大利国家天体物理研究所-射电天文研究所);Dipartimento di Fisica e Astronomia (DIFA), Università di Bologna(博洛尼亚大学物理与天文学系);Istituto Nazionale di Astrofisica – Istituto di Astrofisica Spaziale e Fisica cosmica (IASF)(意大利国家天体物理研究所-空间天体物理学与宇宙物理学研究所);Thüringer Landessternwarte(图林根州天文台);Hamburger Sternwarte, Universität Hamburg(汉堡大学汉堡天文台);Center for Radio Astronomy Techniques and Technologies, Rhodes University(罗德斯大学射电天文技术与方法中心)
GLOW I: Comprehensive Measurements of Gas-Rich, Star-Forming, Low-Mass Galaxies in the Nearby Universe
Space Telescope Science Institute(太空望远镜科学研究所);Rutgers University(罗格斯大学);University of Utah(犹他大学);Indiana University(印第安纳大学);Dartmouth College(达特茅斯学院);University of Minnesota(明尼苏达大学);University of Washington(华盛顿大学);Macalester College(麦卡利斯特学院);New Mexico State University(新墨西哥州立大学);The University of Texas at Austin(德克萨斯大学奥斯汀分校);Cosmic Frontier Center, The University of Texas at Austin(德克萨斯大学奥斯汀分校宇宙前沿中心);Center for Computational Astrophysics, Flatiron Institute(西蒙斯基础研究所计算天体物理中心);University of Arizona(亚利桑那大学);West Virginia University(西弗吉尼亚大学)
Observed Timescales of Stellar Feedback in Star-Forming, Low-Mass Galaxies
Dartmouth College(达特茅斯学院);Indiana University(印第安纳大学);Rutgers University(罗格斯大学);Space Telescope Science Institute(太空望远镜科学研究所);Georgia State University(佐治亚州立大学);University of California, Irvine(加州大学尔湾分校);Raytheon Company(雷神公司);University of Arizona(亚利桑那大学)
Two Peas in a Pod: The First Confirmed Dual Active Galactic Nucleus within a Green Pea Galaxy System
Czech Academy of Sciences(捷克科学院);Max Planck Institute for Extraterrestrial Physics(马克斯·普朗克地外物理研究所);California Institute of Technology(加州理工学院);U.S. Naval Observatory(美国海军天文台);Jet Propulsion Laboratory, California Institute of Technology(加州理工学院喷气推进实验室);University of Crete(克里特大学);Foundation for Research and Technology–Hellas (FORTH)(希腊研究与技术基金会)