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We present the first to date three-dimensional high-resolution hydrodynamical simulation tracing the non-equilibrium ionization evolution (using the Eborae Atomic and Molecular Plasma Emission Code - E(A+M)PEC) of the Local Bubble and Loop…

星系天体物理 · 物理学 2011-09-01 Miguel A. de Avillez , Dieter Breitschwerdt , Emanuele Spitoni , Nuno Carvalho

Massive stars can develop into tepid supergiants at several stages of their post main-sequence evolution, prior to core He-burning, on a blue loop, or close to the final supernova explosion. We discuss observational constraints on models of…

太阳与恒星天体物理 · 物理学 2009-06-22 Norbert Przybilla , Markus Firnstein , Maria-Fernanda Nieva

We developed a computer vision-based methodology to achieve precise 3D segmentation and tracking of superbubbles within magnetohydrodynamic simulations of the supernova-driven interstellar medium. Leveraging advanced 3D transformer models,…

星系天体物理 · 物理学 2026-03-31 Jing-Wen Chen , Alex S. Hill , Anna Ordog , Rebecca A. Booth , Mohamed S. Shehata

We assemble a census of the most massive stars in Orion, then use stellar isochrones to estimate their masses and ages, and use these results to establish the stellar content of Orion's individual OB associations. From this, our new…

星系天体物理 · 物理学 2015-05-19 R. Voss , R. Diehl , J. S. Vink , D. H. Hartmann

Massive stars born in star clusters terminate star cluster formation by ionizing the surrounding gas. This process is considered to be prevalent in young star clusters containing massive stars. The Orion Nebula is an excellent example…

We present the results of three-dimensional magnetohydrodynamic (3D MHD) simulations of the plasma flow structure in the vicinity of a compact cluster of young massive stars. The cluster is considered at the evolutionary stage dominated by…

高能天体物理现象 · 物理学 2026-02-11 D. V. Badmaev , A. M. Bykov , M. E. Kalyashova

Data from the Canadian Galactic Plane Survey reveal an abundance of HI shells and arcs in the disk of our galaxy. While their shape is suggestive of stellar winds or supernovae influence, very few of these structures have been examined in…

天体物理学 · 物理学 2015-06-24 Magdalen Normandeau , A. R. Taylor , P. E. Dewdney , Shantanu Basu

We review the structural properties of giant extragalactic HII regions and HII galaxies based on two dimensional hydrodynamic calculations, and propose an evolutionary sequence that accounts for their observed detailed structure. The model…

天体物理学 · 物理学 2009-11-11 G. Tenorio-Tagle , C. Munoz-Tunon , E. Perez , S. Silich , E. Telles

Interest in stellar feedback has recently increased because new studies suggest that radiative and mechanical feedback from young massive stars regulate the physical and chemical composition of the interstellar medium (ISM) significantly.…

太阳与恒星天体物理 · 物理学 2022-07-27 U. Kavak , J. Bally , J. R. Goicoechea , C. H. M. Pabst , F. F. S. van der Tak , A. G. G. M. Tielens

In this paper we review the modeling of the Local Bubble (LB) with special emphasis on the progress we have made since the last major conference "The Local Bubble and Beyond (I)" held in Garching in 1997. Since then new insight was gained…

天体物理学 · 物理学 2009-08-12 Dieter Breitschwerdt , Miguel A. de Avillez , Verena Baumgartner

We study the evolution of embedded star clusters as possible progenitors to reproduce 30 Doradus, specifically the compact star cluster known as R136 and its surrounding stellar family, which is believed to be part of an earlier star…

星系天体物理 · 物理学 2022-05-13 R. Domínguez , Eric W. Pellegrini , Ralf S. Klessen , Daniel Rahner

The structure and evolution of wind-blown bubbles (WBBs) around massive stars has primarily been investigated using an energy-conserving model of wind-blown bubbles. While this model is useful in explaining the general properties of the…

高能天体物理现象 · 物理学 2023-06-21 Vikram V. Dwarkadas

While studying extraplanar neutral hydrogen in the disk-halo transition of the inner Galaxy we have discovered what appears to be a huge superbubble centered around l ~ 30 deg, whose top extends to latitudes > 25 deg at a distance of about…

天体物理学 · 物理学 2008-11-26 Yurii Pidopryhora , Felix J. Lockman , Joseph C. Shields

Interstellar bubbles are structures in the interstellar medium with diameters of a few to tens of parsecs. Their progenitors are stellar winds, intense radiation of massive stars, or supernova explosions. Star formation and young stellar…

星系天体物理 · 物理学 2016-10-26 Lenka Zychova , Sona Ehlerova

In order to determine the circumstances under which isolated SNRs are capable of rising into and enriching the thick disk and galactic halo, simulations of supernova remnants are performed with the FLASH magnetohydrodynamic code. We…

天体物理学 · 物理学 2008-11-26 E. A. Raley , R. L. Shelton , T. Plewa

Massive stars drive the evolution of the interstellar medium through their radiative and mechanical energy input. After their birth, they form bubbles of hot gas surrounded by a dense shell. Traditionally, the formation of bubbles is…

太阳与恒星天体物理 · 物理学 2014-07-09 B. B. Ochsendorf , S. Verdolini , N. L. J. Cox , O. Berné , L. Kaper , A. G. G. M. Tielens

The Sun lies in the middle of an enormous cavity of a million degree gas, known as the Local Bubble. The Local Bubble is surrounded by a wall of denser neutral and ionized gas. The Local Bubble extends around 100 pc in the plane of Galaxy…

星系天体物理 · 物理学 2015-11-24 Jacco Th. van Loon , Amin Farhang , Atefeh Javadi , Mandy Bailey , Habib Khosroshahi

This paper continues our study of the foreground population to the Orion molecular clouds. The goal is to characterize the foreground population north of NGC 1981 and to investigate the star formation history in the large Orion star-forming…

The radiative feedback of massive stars on molecular clouds creates pillars, globules and other features at the interface between the HII region and molecular cloud. We present here Herschel observations between 70 and 500 micron of the…

In recent times an increasing number of extended haloes and multiple shells around planetary nebulae have been discovered. These faint extensions to the main nebula trace the mass-loss history of the star, modified by the subsequent…

太阳与恒星天体物理 · 物理学 2014-05-21 S. Oettl , S. Kimeswenger , A. A. Zijlstra