Ellerman bomb

Source: Wikipedia, the free encyclopedia.
Ellerman bombs or, maybe, pseudo-Ellerman bombs that are simply "network bright points"[1]

In

emerging flux regions where emerging magnetic fields interact with existing fields. They are named after Ferdinand Ellerman
who studied them in detail in the 20th century.

History

Intense brightenings resembling what would later be referred to as Ellerman bombs were first reported by Walter M. Mitchell in 1909.

Mount Wilson Solar Observatory were described in detail by Ferdinand Ellerman. He referred to them as "solar hydrogen bombs" in reference to the phenomenon only appearing in observations of hydrogen spectral lines.[3][4]

Description

As originally described in Ellerman's 1917 paper, Ellerman bombs are intense brightenings in the wings of the

emerging flux regions where emerging vertical magnetic fields interact with the existing intergranular field. This interaction is suggested to result in magnetic reconnection, producing the brightenings associated with Ellerman bombs.[1][5][6][7]

The lack of observed brightening of the Hα core is attributed to Ellerman bombs being a photospheric phenomenon. In growing active regions, dense chromospheric, Hα fibrils form a canopy above the photosphere blocking Hα emission from Ellerman bombs below. As a result, only emission in the Hα wings pass through and are observed.[1][6]

References

  1. ^
    doi:10.1088/1742-6596/440/1/012007
    .
  2. doi:10.1086/141687
    .
  3. ^
    doi:10.1086/142366
    .
  4. ISBN 9789812567871
    .
  5. ^ Libbrecht, Tine (2019). The diagnostic potential of the He I D3 spectral line in the solar atmosphere (PhD thesis). Stockholm University.
  6. ^
    doi:10.1088/0004-637X/736/1/71
    .
  7. S2CID 818643
    .
Retrieved from "https://en.wikipedia.org/w/index.php?title=Ellerman_bomb&oldid=1229342983"