Kinematics of massive star ejecta in the Milky Way as traced by 26Al

@article{Kretschmer2013KinematicsOM,
  title={Kinematics of massive star ejecta in the Milky Way as traced by 26Al},
  author={Karsten Kretschmer and Roland Diehl and Martin G H Krause and Andreas Burkert and Katharina M. Fierlinger and Ortwin Gerhard and J. Greiner and Wei Wang},
  journal={Astronomy and Astrophysics},
  year={2013},
  volume={559},
  pages={1-11}
}
Context. Massive stars form in groups and their winds and supernova explosions create superbubbles up to kpc in size. The fate of their ejecta is of vital importance for the dynamics of the interstellar medium, for chemical evolution models, and the chemical enrichment of galactic halos and the intergalactic medium. However, ejecta kinematics and the characteristic scales in space and time have not been explored in great detail beyond 10 ka. Aims. Through measurement of radioactive 26 Al with… Expand
Galactic 26Al traces metal loss through hot chimneys
Radioactive 26Al is an excellent tracer for metal ejection in the Milky Way, and can provide a direct constraint on the modelling of supernova feedback in galaxy evolution. Gamma-ray observations ofExpand
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Context. Feedback by massive stars shapes the interstellar medium and is thought to influence subsequent star formation. The details of this process are under debate. Aims. We exploited observationalExpand
26Al kinematics: superbubbles following the spiral arms? Constraints from the statistics of star clusters and HI supershells
Context. High-energy resolution spectroscopy of the 1.8 MeV radioactive decay line of 26Al with the SPI instrument onboard the INTEGRAL satellite has recently revealed that diffuse 26Al has higherExpand
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Emission from the radioactive trace element 26Al has been observed throughout the Milky Way with the COMPTEL and INTEGRAL satellites. In particular, the Doppler shifts measured with INTEGRALExpand
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We present the status and open problems of nucleosynthesis in supernova explosions of both types, responsible for the production of the intermediate mass, Fe-group and heavier elements (with theExpand
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Context. The annihilation of cosmic positrons with electrons in the interstellar medium results in the strongest persistent γ-ray line signal in the sky. For the past 50 yr, this 511 keV emission –Expand
Concurrent formation of supermassive stars and globular clusters: implications for early self-enrichment
We present a model for the concurrent formation of globular clusters (GCs) and supermassive stars (SMSs, ≳103 M⊙) to address the origin of the HeCNONaMgAl abundance anomalies in GCs. GCs form inExpand
Comparing simulated 26Al maps to gamma-ray measurements
Context. The diffuse gamma-ray emission of $^{26}{\rm Al}$ at 1.8 MeV reflects ongoing nucleosynthesis in the Milky Way, and traces massive-star feedback in the interstellar medium due to its 1 MyrExpand
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References

SHOWING 1-10 OF 57 REFERENCES
Metal enrichment of the intracluster medium: SN‐driven galactic winds
We investigate the role of supernova (SN)-driven galactic winds in the chemical enrichment of the intracluster medium (ICM). Such outflows on galactic scales have their origin in huge star formingExpand
Feedback by massive stars and the emergence of superbubbles - I. Energy efficiency and Vishniac instabilities
Context. Massive stars influence their environment via stellar winds , ionising radiation and supernova explosions. This is sign ified by observed interstellar bubbles. Such “feedback” is anExpand
Radioactive 26Al from the Scorpius-Centaurus Association
Context. The Scorpius-Centaurus association is the most-nearby group of massive and young stars. As nuclear-fusion products are ejected by massive stars and supernovae into the surroundingExpand
A huge reservoir of ionized gas around the Milky Way: Accounting for the Missing Mass?
Most of the baryons from galaxies have been "missing" and several studies have attempted to map the circumgalactic medium (CGM) of galaxies in their quest. We report on X-ray observations made withExpand
Evidence of a bisymmetric spiral in the Milky Way
It is extremely difficult to observe the spiral structure of the Milky Way because of our viewing point within the Galactic disc. The aims of this paper are to clarify the structure of the Galaxy byExpand
Gas dynamics and large-scale morphology of the Milky Way galaxy
We present a new model for the gas dynamics in the galactic disc inside the orbit of the Sun. Quasi-equilibrium flow solutions are determined in the gravitational potential of the deprojected COBEExpand
Radioactive 26Al from massive stars in the Galaxy
TLDR
High spectral resolution measurements of 26Al emission at 1808.65 keV demonstrate that the 26Al source regions corotate with the Galaxy, supporting its Galaxy-wide origin and determining a present-day equilibrium mass of 2.8 (± 0.8) solar masses of 27Al. Expand
Using population synthesis of massive stars to study the interstellar medium near OB associations
Aims. We study the massive stars in OB associations and their surrounding interstellar medium environment, using a population synthesis code. Methods. We developed a new population synthesis code forExpand
Galactic winds – how to launch galactic outflows in typical Lyman-break galaxies
We perform hydrodynamical simulations of a young galactic disc embedded in a hot gaseous halo using parameters typical for Lyman break galaxies (LBGs). We take into account the (static) gravitationalExpand
TRIGONOMETRIC PARALLAXES OF MASSIVE STAR-FORMING REGIONS. VI. GALACTIC STRUCTURE, FUNDAMENTAL PARAMETERS, AND NONCIRCULAR MOTIONS
We are using the Very Long Baseline Array and the Japanese VLBI Exploration of Radio Astronomy project to measure trigonometric parallaxes and proper motions of masers found in high-mass star-formingExpand
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