UV Cooling via O VI Emission in the Superwind of M82 Observed with the Far Ultraviolet Spectroscopic Explorer (FUSE)
In: The Astronomical Journal, Jg. 168 (2024), Heft 1, S. 11-11
Online
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Zugriff:
We examined archival Far Ultraviolet Spectroscopic Explorer data to search for far-ultraviolet emission lines in the starburst galaxy M82. The observations were made in an outflow region that extends beyond the galactic disk. We found the O vi λ λ 1032, 1038 emission lines from the galaxy’s southern outflow region. The O vi lines suggest that the outflowing warm-hot gas is undergoing radiative cooling. We measured a radial velocity of ∼420 km s ^−1 from the O vi lines, which is faster than the velocity seen in H α observations. The O vi λ 1038 emission line seems to be blended with the C ii λ 1037 emission line, which has a radial velocity of ∼300 km s ^−1 , similar to what is observed in H α observations. The outflow medium of M82 appears to be composed of gas in multiple phases with varying temperatures and kinematics. Future spectroscopic observations in high energy regimes covering a wider spatial area are necessary to understand better the properties of the warm-hot gas medium in the outflow.
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UV Cooling via O VI Emission in the Superwind of M82 Observed with the Far Ultraviolet Spectroscopic Explorer (FUSE)
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Autor/in / Beteiligte Person: | Kim, Jin-Ah ; Chung, Haeun ; Vargas, Carlos J. ; Hamden, Erika |
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Zeitschrift: | The Astronomical Journal, Jg. 168 (2024), Heft 1, S. 11-11 |
Veröffentlichung: | IOP Publishing, 2024 |
Medientyp: | academicJournal |
ISSN: | 1538-3881 (print) |
DOI: | 10.3847/1538-3881/ad4887 |
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