We study the spatially resolved physical properties of the Cosmic Snake arc in MACS J1206.2-0847 and the arc in Abell 0521 (A521). These are two strongly lensed galaxies at redshifts $z=1.036$ and $z=1.044$. We used observations of the Hubble Space Telescope (HST) and the Atacama Large Millimeter/submillimeter Array (ALMA). The former gives access to the star formation rate (SFR) and stellar mass ($M_\star$), and the latter to the H$_2$ molecular gas mass ($M_{\mathrm{mol}}$). HST and ALMA observations have similar angular resolutions of $0.15^{\prime \prime}-0.2^{\prime \prime}$, which with the help of strong gravitational lensing enable us to reach spatial resolutions down to $\sim 30\,\mathrm{pc}$ and $\sim 100\,\mathrm{pc}$ in these two galaxies, respectively. These resolutions are close to the resolution of observations of nearby galaxies. We study the radial profiles of SFR, $M_\star$, and $M_{\mathrm{mol}}$ surface densities of these high-redshift galaxies and compare the corresponding exponential scale lengths with those of local galaxies. We find that the scale lengths in the Cosmic Snake are about $0.5\,\mathrm{kpc}-1.5\,\mathrm{kpc}$, and they are 3 to 10 times larger in A521. This is a significant difference knowing that the two galaxies have comparable integrated properties. These high-redshift scale lengths are nevertheless comparable to those of local galaxies, which cover a wide distribution. The particularity of our high-redshift radial profiles is the normalisation of the $M_{\mathrm{mol}}$ surface density profiles ($ΣM_{\mathrm{mol}}$), which are offset by up to a factor of 20 with respect to the profiles of $z=0$ counterparts. The SFR surface density profiles are also offset by the same factor as $ΣM_{\mathrm{mol}}$, as expected from the Kennicutt-Schmidt law.
Infrared Galaxies in the Field of the Massive Cluster Abell S1063: Discovery of a Luminous Kiloparsec-Sized HII Region in a Gravitationally Lensed IR-Luminous Galaxy at $z=0.6$
An ALMA sub-kiloparsec test of the Kennicutt--Schmidt relation in a strongly lensed dusty star-forming galaxy at $z\sim2.78$
Universidad de Valparaíso(瓦尔帕莱索大学);Millenium Nucleus for Galaxies (MINGAL)(星系千年核(MINGAL));STAR Institute(STAR研究所);Université Côte d’Azur(蔚蓝海岸大学);University of Florida(佛罗里达大学);Universidad Nacional Autónoma de México(墨西哥国立自治大学);Instituto Nacional de Astrofísica Óptica y Electrónica (INAOE)(国家天体物理学、光学和电子学研究所);Universidad Central de Chile(智利中央大学)
LEGGOS: A Shocking Lack of Evidence for Shocks at sub-kiloparsec Scales at 2 < z < 4
The Pennsylvania State University(宾夕法尼亚州立大学);NASA Goddard Space Flight Center(美国宇航局戈达德太空飞行中心);University of Maryland, Baltimore County(马里兰大学巴尔的摩分校);International Space Science Institute(国际空间科学研究所);University of Washington(华盛顿大学)
Kiloparsec view of a typical star-forming galaxy when the Universe was $\sim$1 Gyr old II. Regular rotating disk and evidence for baryon dominance on galactic scales
我们提出了一个运动学分析的主序星星系HZ 4在$z=5.5$。我们的研究是基于深,空间分辨观测的[CII] 158 PDMATHAMN米过渡与阿塔卡马大型毫米/亚毫米阵列(ALMA)。从盘形态的综合分析,二维速度结构,和一维速度和速度色散剖面的正演模拟,我们得出结论,HZ 4有一个规则的旋转盘到位。HZ 4的本征速度频散很高($σ_{0}=65.8^{+2.9}_{-3.3}$ km s $^{-1}$),自转速度与本征速度频散之比为$V_{\rm rot}/σ_{0}=2.2$。这些值是一致的预期从增加$σ_{0}$和减少$V_{\rm rot}/σ_{0}$的红移的函数观测到的主序星星系高达$z\approx4$的趋势。星系演化模型表明,在HZ 4中观察到的高水平湍流只有在除了恒星反馈之外,圆盘内还有气体的径向传输时才能实现。最后,我们发现HZ 4是星系尺度上的重子支配($\lesssim2\times R_{\rm e}$),暗物质分数在一个有效半径为$f_{\rm DM}(R_{\rm e})=0.41^{+0.25}_{-0.22}$。这个值与在可能是HZ 4后代的较低红移星系中发现的暗物质部分相当:大质量($M_{\star}\approx10^{11}~M_{\odot}$),在$z\sim2$的恒星形成星系,以及在$z\approx0$的被动早期类型星系。
VENUS: A Strongly Lensed Clumpy Galaxy at $z\sim11-12$ behind the Galaxy Cluster MACS J0257.1-2325
Institute for Cosmic Ray Research, The University of Tokyo(宇宙线研究所,东京大学);Department of Physics, Graduate School of Science, The University of Tokyo(东京大学理学研究科物理学系);Department of Astronomy, The University of Texas at Austin(德克萨斯大学奥斯汀分校天文学系);Cosmic Frontier Center, The University of Texas at Austin(德克萨斯大学奥斯汀分校前沿宇宙学中心);David A. Dunlap Department of Astronomy and Astrophysics, University of Toronto(多伦多大学戴维·A·邓普天文学与天体物理学系);Dunlap Institute for Astronomy and Astrophysics(邓普天文学与天体物理研究所);National Astronomical Observatory of Japan(日本国立天文台);Department of Astronomical Science, SOKENDAI (The Graduate University for Advanced Studies)(SOKENDAI(高级研究大学院大学)天文学科学系);Kavli Institute for the Physics and Mathematics of the Universe (WPI), The University of Tokyo(东京大学 Kavli宇宙物理数学研究所(WPI))
The large-scale kinematics of young stars in the Milky Way disc: first results from SDSS-V
University of North Florida(北佛罗里达大学);University of Toronto(多伦多大学);KU Leuven(荷语鲁汶大学);Universidad de La Serena(拉塞雷纳大学);University of Colorado Boulder(科罗拉多大学博尔德分校);University of Virginia(弗吉尼亚大学);Chalmers University of Technology(查尔姆斯理工大学);New Mexico State University(新墨西哥州立大学);Moscow State University(莫斯科国立大学);Texas Christian University(得克萨斯基督教大学);University of Illinois at Urbana-Champaign(伊利诺伊大学厄巴纳-香槟分校);Princeton University(普林斯顿大学)
NOEMA3D: Resolving radial gas flows in disk galaxies at z~1.1-1.6 with high-resolution CO observations
Max-Planck-Institut für extraterrestrische Physik(马克斯·普朗克地外物理研究所);Departments of Physics and Astronomy, University of California, Berkeley(加州大学伯克利分校物理与天文学系);Institut de Radioastronomie Millimétrique (IRAM)(毫米波射电天文研究所);Max-Planck-Institut für Astrophysik (MPA)(马克斯·普朗克天体物理研究所);Department of Physics and Astronomy “Augusto Righi”, University of Bologna(博洛尼亚大学“奥古斯托·里吉”物理与天文学系);INAF – Astrophysics and Space Science Observatory of Bologna(意大利国家天体物理研究所博洛尼亚天文与空间科学观测站)
Spatially Resolved AGN Ionization and Star Formation at Cosmic Noon with JWST/JEMS
Steward Observatory, University of Arizona(亚利桑那大学斯图尔德天文台);NSF NOIRLab(美国国家科学基金会NOIR天文台);International Gemini Observatory/NSF NOIRLab(国际Gemini天文台/美国国家科学基金会NOIR天文台);Department of Astronomy, University of Wisconsin-Madison(威斯康星大学麦迪逊分校天文学系);Kavli Institute for Cosmology, Cambridge(剑桥卡弗里宇宙学研究所)