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We numerically investigate dynamical and chemical properties of star clusters (open and globular clusters, and ``super star clusters'', SSC) formed in interacting/merging galaxies. The investigation is two-fold: (1) large-scale…

天体物理学 · 物理学 2009-11-10 Kenji Bekki

The properties of 939 star clusters in the Large and Small Magellanic Clouds were determined from ground-based CCD images in UBVR passbands. The areal coverage was extensive, corresponding to 11.0 sq-kpc in the LMC and 8.3 sq-kpc in the…

天体物理学 · 物理学 2008-11-26 D. A. Hunter , B. G. Elmegreen , T. J. Dupuy , M. Mortonson

We present models for the initial mass function (IMF) for stars forming within molecular clouds. These models use the idea that stars determine their own masses through the action of powerful stellar outflows. This concept allows us to…

天体物理学 · 物理学 2009-10-28 Fred C. Adams , Marco Fatuzzo

We calculate the integrated galactic initial stellar mass function (IGIMF) in the presence of IMF variations in clusters. IMF Variations for a population of clusters are taken into account in the form of Gaussian distributions of the IMF…

星系天体物理 · 物理学 2022-10-19 Sami Dib

(abridged) The case can be made for a rather universal stellar IMF form that can be approximated by a two-part power-law function in the stellar regime. However, there exists a possible hint for a systematic variation with metallicity. A…

天体物理学 · 物理学 2007-05-23 Pavel Kroupa

A positive power-law trend between the local surface densities of molecular gas, $\Sigma_{gas}$, and young stellar objects, $\Sigma_{\star}$, in molecular clouds of the Solar Neighbourhood has been identified by Gutermuth et al. How it…

星系天体物理 · 物理学 2015-06-12 Genevieve Parmentier , Susanne Pfalzner

Understanding how galaxies interact with the circumgalactic medium (CGM) requires determining how galaxies morphological and stellar properties correlate with their CGM properties. We report an analysis of 66 well-imaged galaxies detected…

The observed present-day stellar mass function (PDMF) of the solar neighborhood is a mixture of stellar populations born in star-forming events that occurred over the life-time of the thin disk of the Galaxy. Assuming stars form in embedded…

星系天体物理 · 物理学 2019-01-30 Akram Hasani Zonoozi , Hamidreza Mahani , Pavel Kroupa

Aims: We investigate the build-up of stellar mass through star formation in field galaxies, galaxy groups, and clusters in order to better understand the physical processes regulating star formation in different haloes. Methods: In order to…

天体物理学 · 物理学 2009-09-01 Georg Feulner , Ulrich Hopp , Christine S. Botzler

We discuss the dependence of various properties of the star formation rate (SFR) and efficiency (SFE) in molecular clouds (MCs) on the maximum mass reached by the clouds, based on a previously-published model for MC and SFR evolution in…

太阳与恒星天体物理 · 物理学 2015-06-17 Manuel Zamora-Avilés , Enrique Vázquez-Semadeni

Star formation on galactic scales is known to be a slow process, but whether it is slow on smaller scales is uncertain. We cross-correlate 5469 giant molecular clouds (GMCs) from a new all-sky catalog with 256 star forming complexes (SFCs)…

星系天体物理 · 物理学 2016-12-28 Eve J. Lee , Marc-Antoine Miville-Deschenes , Norman Murray

A supersonic cloud-cloud collision produces a shock-compressed layer which leads to formation of high-mass stars via gravitational instability. We carried out a detailed analysis of the layer by using the numerical simulations of…

星系天体物理 · 物理学 2020-08-26 Yasuo Fukui , Tsuyoshi Inoue , Takahiro Hayakawa , Kazufumi Torii

We study the nature of feedback mechanisms in the 11 CLASH brightest cluster galaxies (BCGs) that exhibit extended ultraviolet and nebular line emission features. We estimate star formation rates (SFRs), dust masses, and starburst durations…

星系天体物理 · 物理学 2017-09-13 Kevin Fogarty , Marc Postman , Rebecca Larson , Megan Donahue , John Moustakas

The objective of this paper is to construct a catalog providing the dust properties and the star formation efficiency (SFE) of the molecular clouds in the Large Magellanic Cloud (LMC). We use the infrared (IR) data obtained with the Spitzer…

星系天体物理 · 物理学 2015-05-20 D. Paradis , W. T. Reach , J. P. Bernard , S. Madden , K. Dobashi , M. Meixner , T. Onishi , A. Kawamura , Y. Fukui

The stellar initial mass function (IMF) integrated over an entire galaxy is an integral over all separate star-formation events. Since most stars form in star clusters with different masses the integrated IMF becomes an integral of the…

天体物理学 · 物理学 2007-05-23 C. Weidner , P. Kroupa

We investigate the triggering of star formation and the formation of stellar clusters in molecular clouds that form as the ISM passes through spiral shocks. The spiral shock compresses gas into $\sim$100 pc long main star formation ridge,…

星系天体物理 · 物理学 2017-10-13 R. Smilgys , I. A. Bonnell

Observations of mergers of multi-compact object systems offer insights to the formation processes of massive stars in globular clusters. Simulations of stellar clusters, may be used to understand and interpret observations. Simulations…

星系天体物理 · 物理学 2018-12-27 Indulekha Kavila , Megha Viswambharan

By resimulating a region of a global disc simulation at higher resolution, we resolve and study the properties of molecular clouds with a range of masses from a few 100's M$_{\odot}$ to $10^6$ M$_{\odot}$. The purpose of our paper is…

星系天体物理 · 物理学 2015-06-23 Clare L. Dobbs

We present the results of a Near-Infrared deep photometric survey of a sample of six embedded star clusters in the Vela-D molecular cloud, all associated with luminous (~10^3 Lsun) IRAS sources. The clusters are unlikely to be older than a…

天体物理学 · 物理学 2009-11-11 Fabrizio Massi , Leonardo Testi , Leonardo Vanzi

We present a model for the radiative output of star clusters in the process of star formation suitable for use in hydrodynamical simulations of radiative feedback. Gas in a clump, defined as a region whose density exceeds 10^4 cm^-3, is…

星系天体物理 · 物理学 2015-06-18 Corey S. Howard , Ralph E. Pudritz , William E. Harris