ASKAP-EMU imaging of NGC 7213 unveils 56-kpc radio hyperbubbles and kiloparsec-scale polarised jets, consistent with episodic AGN activity likely from a supermassive binary black hole.
Evidence for a two-armed spiral in the Milky Way
3 Pith papers cite this work, alongside 2 external citations. Polarity classification is still indexing.
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Pith papers citing it
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external citations · Pith
abstract
Emission profiles of the Galactic plane in K and at $240\micron$ are presented, and features associated with the tangents of the spiral arms are identified. In the K band, which traces stellar emission and suffers little from absorbtion, features associated with the arm tangents indicate that a two-armed logarithmic spiral dominates the nonaxisymmetric structure of the Milky Way. In contrast, the $240\micron$ emission from dust entrained in the interstellar gas is consistent with a four-armed model, in concordance with radio data and optical spiral tracers. This suggests that the non-axisymmetric mass perturbation responsible for the four-armed spiral structure in the gas has a two rather than four-armed structure.
fields
astro-ph.GA 3years
2026 3representative citing papers
C-rich AGB stars trace the Galactic warp with larger amplitudes than Cepheids at intermediate ages of about 1 Gyr.
citing papers explorer
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EMU detection of mysterious multiple component radio-continuum emission from nearby spiral Seyfert I type galaxy 'Sand-timer' (NGC 7213)
ASKAP-EMU imaging of NGC 7213 unveils 56-kpc radio hyperbubbles and kiloparsec-scale polarised jets, consistent with episodic AGN activity likely from a supermassive binary black hole.
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Milky Way's warped disc traced by AGB stars
C-rich AGB stars trace the Galactic warp with larger amplitudes than Cepheids at intermediate ages of about 1 Gyr.
- Rogue Ones: Orbital census of Galactic Cepheids and their Anomalies