A 60 kpc Galactic Wind Cone in NGC 3079.
In: Astrophysical Journal, Jg. 903 (2020-11-01), Heft 1, S. 1-13
Online
academicJournal
Zugriff:
Galactic winds are associated with intense star formation and active galactic nuclei. Depending on their formation mechanism and velocity, they may remove a significant fraction of gas from their host galaxies, thus suppressing star formation, enriching the intergalactic medium, and shaping the circumgalactic gas. However, the long-term evolution of these winds remains mostly unknown. We report the detection of a wind from NGC 3079 to at least 60 kpc from the galaxy. We detect the wind in far-ultraviolet (FUV) line emission to 60 kpc (as inferred from the broad FUV filter in the Galaxy Evolution Explorer) and X-rays to at least 30 kpc. The morphology, luminosities, temperatures, and densities indicate that the emission comes from shocked material, and the O/Fe ratio implies that the X-ray-emitting gas is enriched by Type II supernovae. If so, the speed inferred from simple shock models is about 500 km s−1, which is sufficient to escape the galaxy. However, the inferred kinetic energy in the wind from visible components is substantially smaller than canonical hot superwind models. [ABSTRACT FROM AUTHOR]
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A 60 kpc Galactic Wind Cone in NGC 3079.
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Autor/in / Beteiligte Person: | Hodges-Kluck, Edmund J. ; Yukita, Mihoko ; Tanner, Ryan ; Ptak, Andrew F. ; Bregman, Joel N. ; Li, Jiang-tao |
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Zeitschrift: | Astrophysical Journal, Jg. 903 (2020-11-01), Heft 1, S. 1-13 |
Veröffentlichung: | 2020 |
Medientyp: | academicJournal |
ISSN: | 0004-637X (print) |
DOI: | 10.3847/1538-4357/abb884 |
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