DIISC-III: Signatures of Stellar Disk Growth in Nearby Galaxies
Mansi Padave, Sanchayeeta Borthakur, Hansung B. Gim, David Thilker, Rolf A. Jansen, Jacqueline Monckiewicz, Robert C. Kennicutt, Guinevere Kauffmann, Andrew J. … 展开作者
Mansi Padave, Sanchayeeta Borthakur, Hansung B. Gim, David Thilker, Rolf A. Jansen, Jacqueline Monckiewicz, Robert C. Kennicutt, Guinevere Kauffmann, Andrew J. Fox, Emmanuel Momjian, Timothy Heckman
我们作为“解密星际介质、恒星与星系周介质之间的相互作用”(DIISC)巡天的一部分,探索了14个邻近旋涡星系中恒星盘的增长。我们研究了比恒星形成率(sSFR)的径向分布,并考察了盘的外部和内部sSFR之差($Δ_{sSFR}~={\ m sSFR}_{out}-{\ m sSFR}_{in}$)与总sSFR之比,即$Δ_{sSFR}$/sSFR,以量化盘的增长。我们发现$Δ_{sSFR}$/sSFR与HI气体比例显示出轻微的相关性,Spearman's $ρ=0.30$,表明在HI气体比例高的星系盘中,恒星形成和盘增长可能向外进行。星系中的HI气体比例和$Δ_{sSFR}$/sSFR也随着到最近L$_\u2217$邻居的距离增加而增加,这表明星系在孤立环境中可能维持其星际介质中的冷气体,并表现出由内而外的增长。然而,在孤立环境中,星系周介质中的HI含量(通过Ly$α$等效宽度(W$_{Lyα}$)超出量探测)被观察到受到抑制,这从W$_{Lyα}$超出量与到第5个最近L$_\u2217$邻居的距离之间的强反相关性(Spearman's $ρ=-0.62$)可以看出。正如预期,W$_{Lyα}$在星系团星系中也受到抑制。我们发现探测到的CGM吸收体的W$_{Lyα}$超出量与$Δ_{sSFR}$/sSFR之间没有关系,这意味着星系周HI气体的增强和抑制并不影响恒星形成在星系盘中的进行方向,反之亦然。
英文摘要:
We explore the growth of the stellar disks in 14 nearby spiral galaxies as part of the Deciphering the Interplay between the Interstellar medium, Stars, and the Circumgalactic medium (DIISC) survey. We study the radial distribution of specific star formation rates (sSFR) and investigate the ratio of the difference in the outer and inner sSFR ($Δ_{sSFR}~={\rm sSFR}_{out}-{\rm sSFR}_{in}$) of the disk and the total sSFR, $Δ_{sSFR}$/sSFR to quantify disk growth. We find $Δ_{sSFR}$/sSFR and the HI gas fraction to show a mild correlation of Spearman's $ρ=0.30$, indicating that star formation and disk growth are likely to proceed outward in galactic disks with high HI gas fractions. The HI gas fractions and $Δ_{sSFR}$/sSFR of the galaxies also increase with the distance to the nearest L$_\star$ neighbor, suggesting that galaxies are likely to sustain their ISM cold gas and exhibit inside-out growth in isolated environments. However, the HI content in their circumgalactic medium, probed by the Ly$α$ equivalent width (W$_{Lyα}$) excess, is observed to be suppressed in isolated environments, apparent from the strong anti-correlation between the W$_{Lyα}$ excess and the distance to the 5$^{\rm th}$ nearest L$_\star$ neighbor (Spearman's $ρ=-0.62$). As expected, W$_{Lyα}$ is also found to be suppressed in cluster galaxies. We find no relation between the W$_{Lyα}$ excess of the detected CGM absorber and $Δ_{sSFR}$/sSFR implying that the enhancement and suppression of the circumgalactic HI gas does not affect the direction in which star formation proceeds in a galactic disk or vice-versa.
ALMA FACTS III. High-Resolution CO(2-1)/CO(1-0) Maps of Twelve Nearby Galaxies
Stony Brook University(石溪大学);Institute of Astronomy, Graduate School of Science, The University of Tokyo(东京大学理学研究科天文学研究所);National Astronomical Observatory of Japan(日本国立天文台);Joint ALMA Observatory(ALMA联合观测站);Division of Liberal Arts, Kogakuin University(工学院大学教养学部);Research Center for Physics and Mathematics, Osaka Electro-Communication University(大阪电通大学理数研究中心)
Quantifying Feedback from Narrow Line Region Outflows in Nearby Active Galaxies. III. Results for the Seyfert 2 Galaxies Markarian 3, Markarian 78, and NGC 1068
Active Galactic Nuclei and STaR fOrmation in Nearby Galaxies AGNSTRONG. III. A Study on Ionized and Warm Molecular Gas Outflows of 6 Type-2 AGNs
Department of Astronomy, University of Science and Technology of China(中国科学技术大学天文系);School of Astronomy and Space Science, University of Science and Technology of China(中国科学技术大学天文与空间科学学院)
CO Multi-line Imaging of Nearby Galaxies (COMING). III. Dynamical effect on molecular gas density and star formation in the barred spiral galaxy NGC 4303
作为近星系CO多线成像(COMING)计划的一部分,我们给出了对邻近棒旋星系NGC 4303的$^{12}$ CO($J$ = 1 - 0)和$^{13}$ CO($J$ =1-0)同步映射的结果.棒旋星系在棒区的恒星形成效率(SFE)通常比旋臂低。本文利用CO数据结合档案远紫外和24 $μ$ m数据研究了银盘内8个不同区域分子气体$n(\rm{H}_2)$的SFE和体积密度之间的关系。我们证实,在酒吧区的SFE是低于39%,在旋臂。此外,在各个区域的光谱进行速度对齐堆叠分析。作为叠加的结果,$^{12}$ CO与$^{13}$ CO的积分强度比($R_{12/13}$)范围为10至17。通过对$R_{12/13}$的非局域热力学平衡(non-LTE)分析,确定了分子气体的动力学温度,导出了$n(\rm{H}_2)$.横杠内$n(\rm{H}_2)$密度比臂内低31-37%,SFE与$n(\rm{H}_2)$之间有较强的正相关,相关系数为$\sim 0.8$。此外,我们还发现了$n(\rm{H}_2)$对分子间云速度色散($ΔV/ \sin i$)的依赖性。具体地,当$ΔV/ \sin i < 100$ km是$^{-1}$时,$n(\rm{H}_2)$随着$ΔV/ \sin i$的增加而增加。另一方面,当$ΔV/ \sin i > 100$ km s $^{-1}$时,$n(\r…
The GMRT archive atomic gas survey -- III. Comparative Study of Dark Matter Halos in Nearby Galaxies
Indian Institute of Science(印度科学研究所);Indian Institute of Astrophysics(印度天体物理研究所);Max-Planck-Institut für Radioastronomie (MPIfR)(马克斯·普朗克射电天文研究所);Institute of Astronomy and National Astronomical Observatory, Bulgarian Academy of Sciences(保加利亚科学院天文学与国家天文台);New Mexico Institute of Mining and Technology(新墨西哥矿业理工学院);Indian Institute of Technology Indore(印度印多尔理工学院);ASTRON – Netherlands Institute for Radio Astronomy(荷兰射电天文研究所);National Centre for Radio Astrophysics (NCRA–TIFR)(国家射电天体物理学中心)
Spectrally and spatially resolved (sub)millimeter HCN-to-HCO$^{+}$ flux ratios in nearby ultraluminous infrared galaxies
National Astronomical Observatory of Japan, National Institutes of Natural Sciences (NINS)(日本国立天文台,国立自然科学研究院);Department of Astronomy, School of Science, Graduate University for Advanced Studies (SOKENDAI)(高级研究大学院大学(SOKENDAI)理学部天文学科);Toyo University(东洋大学);Institute of Pure and Applied Sciences, University of Tsukuba(筑波大学纯应用科学研究所);Tomonaga Center for the History of the Universe, University of Tsukuba(筑波大学丰顺伽宇宙历史中心);Tsukuba Institute for Advanced Research (TIAR), University of Tsukuba(筑波大学筑波高等研究院 (TIAR));Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency(日本宇宙航空研究开发机构宇宙科学研究所)
TRAO Survey of Nearby Filamentary Molecular clouds, the Universal Nursery of Stars (TRAO-FUNS). III. Filaments and dense cores in the NGC 2068 and NGC 2071 regions of Orion B
Direct Evidence for Outflow Driven by Wolf-Rayet Stars in the Nearby Galaxy PGC44685
Nanjing University(南京大学);National Astronomical Observatory of Japan(日本国立天文台);Nanjing Normal University(南京师范大学);Anqing Normal University(安庆师范大学);QingHai Univ(青海大学)
Investigating the Young Stellar Populations and Hierarchies in Nearby Galaxies with the UVIT. III. Evidence for a Largest Scale of Correlated Stellar Structures and a Non-universal Fractal Dimension
Indian Institute of Astrophysics(印度天体物理研究所);Pondicherry University(本地治里大学);Leibniz-Institut für Astrophysik Potsdam(波茨坦莱布尼茨天体物理研究所);Center for Computational Astrophysics, Flatiron Institute(平顿研究所计算天体物理学中心);Rutgers University(罗格斯大学);S. N. Bose National Centre for Basic Sciences(S.N. 玻色基础科学国家中心);Australian National University(澳大利亚国立大学);Macquarie University(麦考瑞大学);IIT (BHU)(印度技术学院(贝拿勒斯印度教大学))
Diversity of Ionized Gas Structures in Nearby Metal-poor Dwarf Galaxies
University of Tsukuba(筑波大学);Tsukuba Institute for Advanced Research (TIAR), University of Tsukuba(筑波大学先进研究院);Tomonaga Center for the History of the Universe (TCHoU), Faculty of Pure and Applied Sciences, University of Tsukuba(筑波大学理学院朝永振一郎宇宙历史中心);The University of Tokyo(东京大学);Stockholm University(斯德哥尔摩大学);Universidad Nacional Autónoma de México, Instituto de Astronomía(墨西哥国立自治大学天文学研究所);Nagoya University(名古屋大学);Waseda University(早稻田大学)
Mapping Dust Attenuation at Kiloparsec Scales. IV. A Dust-model Interpretation of Attenuation Curves in Nearby Galaxies
Tsinghua University(清华大学);INAF–Osservatorio Astronomico di Brera(意大利国家天体物理研究所布雷拉天文台);National Astronomical Observatories, Chinese Academy of Sciences(中国科学院国家天文台);The Chinese University of Hong Kong(香港中文大学)
Spatially Resolved Spectroscopic Study of nearby Seyfert Galaxies: Implications for a Population of "Missed" Seyferts at High-$\textit{z}$
我们提出了镶嵌长缝光谱图的18个附近的活动星系核(AGN),2 LINER,和4恒星形成星系。利用Lick天文台3 m Shane望远镜上的Kast双摄谱仪获得的数据立方体,我们测量了孔径对活动星系核光谱分类的影响。随着更多的星光被包含在更大的孔径中,像塞弗特一样的核光谱可能会被污染。我们在不同的观测孔径生成标准的光谱分类图。这些定量地显示了如何塞弗茨合奏迁移到H $\scriptsize{\textrm{II}}$区域分类时,观察到的孔径尺寸增加。但这种效应在个别活跃星系中的范围很广。一些亮度较低的塞弗特星移动了很大一部分,而另一些几乎没有移动,甚至向不同的方向移动。我们发现,那些核H $α$发射率低于宿主星系0.2,2-10 keV硬X射线光度低于$10^{43}$ erg s $^{-1}$,观测到的核[O $\scriptsize{\textrm{III}}$ ]光度低于$10^{40.5}$ erg s $^{-1}$的Seyfert星系,当包含整个宿主星系时,更有可能改变活动分类类型。总的来说,我们的24个星系中有4个(18个塞弗特星系)在用非常大的孔径观察时改变了它们的光谱活动分类类型。