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相关论文: Investigating the structure of star-forming region…

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We present a uniform mid-infrared imaging and photometric survey of 36 young, nearby, star-forming clusters and groups using {\it Spitzer} IRAC and MIPS. We have confidently identified and classified 2548 young stellar objects using…

太阳与恒星天体物理 · 物理学 2009-08-25 R. A. Gutermuth , S. T. Megeath , P. C. Myers , L. E. Allen , J. L. Pipher , G. G. Fazio

Face clustering is a promising method for annotating unlabeled face images. Recent supervised approaches have boosted the face clustering accuracy greatly, however their performance is still far from satisfactory. These methods can be…

计算机视觉与模式识别 · 计算机科学 2021-03-30 Shuai Shen , Wanhua Li , Zheng Zhu , Guan Huang , Dalong Du , Jiwen Lu , Jie Zhou

Recently, mid-infrared instruments have become available on several large ground-based telescopes, resulting in data sets with unprecedented spatial resolution at these long wavelengths. In this paper we examine 'ground-based-only'…

天体物理学 · 物理学 2009-11-13 Leonie Snijders , Lisa J. Kewley , Paul P. van der Werf

We used the dendrogram algorithm to decompose the surface density distributions of stars into hierarchical structures. These structures were tied to the multiscale structures of star clusters. A similar power-law for the mass-size relation…

星系天体物理 · 物理学 2024-07-30 J. W. Zhou , Pavel Kroupa , Sami Dib

The observed increase in star formation efficiency with average cloud density, from several percent in whole giant molecular clouds to ~30 or more in cluster-forming cores, can be understood as the result of hierarchical cloud structure if…

天体物理学 · 物理学 2009-11-13 Bruce G. Elmegreen

At the earliest evolutionary stages, massive star-forming regions are deeply embedded within their natal cores and not observable at optical and near-infrared wavelengths. Interferometric high-spatial resolution mm dust continuum…

天体物理学 · 物理学 2015-11-11 Henrik Beuther

Studies of evolved massive stars indicate that they form in a clustered mode. During the earliest evolutionary stages, these regions are embedded within their natal cores. Here, we show high-spatial-resolution interferometric dust continuum…

天体物理学 · 物理学 2009-11-10 H. Beuther , P. Schilke

We employ a suite of 75 simulations of galaxies in idealised major mergers (stellar mass ratio ~2.5:1), with a wide range of orbital parameters, to investigate the spatial extent of interaction-induced star formation. Although the total…

We present a study of the hierarchical clustering of the young stellar clusters in six local (3--15 Mpc) star-forming galaxies using Hubble Space Telescope broad band WFC3/UVIS UV and optical images from the Treasury Program LEGUS (Legacy…

Unbiased analysis shows that IRAS data reliably differentiate between the early and late stages of stellar evolution because objects at these stages clearly segregate in infrared color-color diagrams. Structure in these diagrams is…

天体物理学 · 物理学 2009-10-31 Zeljko Ivezic , Moshe Elitzur

Interacting galaxies are known to have higher global rates of star formation on average than normal galaxies, relative to their stellar masses. Using UV and IR photometry combined with new and published H-alpha images, we have compared the…

星系天体物理 · 物理学 2016-03-09 Beverly J. Smith , Javier Zaragoza-Cardiel , Curtis Struck , Susan Olmsted , Keith Jones

We examine the performance of four different methods which are used to measure mass segregation in star-forming regions: the radial variation of the mass function $\mathcal{M}_{\rm MF}$; the minimum spanning tree-based $\Lambda_{\rm MSR}$…

星系天体物理 · 物理学 2015-06-24 Richard J. Parker , Simon P. Goodwin

Background: low-mass stars are the dominant product of the star formation process, and they trace star formation over the full range of environments, from isolated globules to clusters in the central molecular zone. In the past two decades,…

We present a study of the spatial distribution of the stellar cluster populations in the star forming galaxy NGC 628. Using Hubble Space Telescope broad band WFC3/UVIS UV and optical images from the Treasury Program LEGUS (Legacy…

Star clusters are fundamental units of stellar feedback and unique tracers of their host galactic properties. In this review, we will first focus on their constituents, i.e.\ detailed insight into their stellar populations and their…

The empirical laws of star formation suggest that galactic-scale gravity is involved, but they do not identify the actual triggering mechanisms for clusters in the final stages. Many other triggering processes satisfy the empirical laws…

天体物理学 · 物理学 2009-11-07 Bruce G. Elmegreen

We review progress in numerical simulations of star cluster formation. These simulations involve the bottom-up assembly of clusters through hierarchical mergers, which produces a fractal stellar distribution at young (~0.5 Myr) ages. The…

星系天体物理 · 物理学 2015-05-14 Cathie Clarke

(abridged) The old Star Cluster (SC) systems surrounding any sofar investigated galaxy represent a powerful tool for the understanding of the cosmological evolution of their host galaxies. Phases of enhanced cluster formation can be…

天体物理学 · 物理学 2007-05-23 P. Anders , R. de Grijs , U. Fritze-v. Alvensleben

We consider the effect of mass segregation on the observable integrated properties of star clusters. The measurable properties depend on a combination of the dynamical age of the cluster and the physical age of the stars in the cluster. To…

天体物理学 · 物理学 2009-11-13 Evghenii Gaburov , Mark Gieles