North Polar Spur: Gaseous plume(s) from star-forming regions ∼3–5 kpc from the Galactic Center?
We argue that the North Polar Spur (NPS) and many less prominent structures are formed by gaseous metal-rich plumes associated with star-forming regions (SFRs). The SFRs located at the tangent to the 3−5 kpc rings might be particularly relevant to the NPS. A multi-temperature mixture of gaseous components and cosmic rays rises above the Galactic disk under the action of their initial momentum and buoyancy. Eventually, the plume velocity becomes equal to that of the ambient gas, which rotates with different angular speeds than the stars in the disk. As a result, the plumes acquire characteristic bent shapes. An ad hoc model of plumes’ trajectories shows an interesting resemblance to the morphology of structures seen in the radio continuum and X-rays.
Authors
- Ildar Khabibullin (ORCID: https://orcid.org/0000-0003-3701-5882)
- Н. Н. Чугай (ORCID: https://orcid.org/0000-0003-2895-6066)
- M. Andrei Bykov
- И. И. Зинченко (ORCID: https://orcid.org/0000-0003-2793-8229)
- E. Churazov (ORCID: https://orcid.org/0000-0002-0322-884X)
- A. R. Sunyaev
- P. Victor Utrobin
Institutions
- Kurchatov Institute (RU)
- Space Research Institute (RU)
- Max Planck Institute for Astrophysics (DE)
- Institute of Astronomy (RU)
- Institute of Applied Physics (RU)
- Ludwig-Maximilians-Universität München (DE)
- Ioffe Institute (RU)
Publication Details
- Journal
- Astronomy and Astrophysics
- Published
- 2024-11-01
- DOI
- https://doi.org/10.1051/0004-6361/202451762
- Citations
- 7
- Primary Topic
- Astrophysics and Star Formation Studies
- Type
- article
- Field-Weighted Citation Impact
- 2.32
Funders
- European Commission
- Eberhard Karls Universität Tübingen
- Max-Planck-Gesellschaft
- Universität Hamburg
- Rheinische Friedrich-Wilhelms-Universität Bonn
- Leibniz-Institut für Astrophysik Potsdam
- Leibniz-Gemeinschaft
- Russian Academy of Sciences