Julia M. Riley (née Hill, born 1947) is a British astrophysicist who developed the Fanaroff–Riley classification.
Personal and professional background
She is the daughter of Philippa (born Pass) and British marine geophysicist Maurice Hill and granddaughter of Nobel Prize–winning physiologist Archibald Vivian Hill. Riley is a Fellow of Girton College associated with the Cavendish Astrophysics Group at University of Cambridge. Her primary field of research is in the area of radio astronomy. Riley lectures and supervises physics within the Natural Sciences Tripos at the University of Cambridge.
Fanaroff–Riley type I and II
In 1974, along with Bernard Fanaroff, she wrote a paper classifying radio galaxies into two types based on their morphology (shape). Fanaroff and Riley's classification became known as Fanaroff–Riley type I and II of radio galaxies (FRI and FRII). In FRI sources the major part of the radio emission comes from closer to the centre of the source, whereas in FRII sources the major part of the emission comes from hotspots set away from the centre (see active galaxies).
References
- ^ Malcolm S. Longair (15 June 2006). The Cosmic Century: A History of Astrophysics and Cosmology. Cambridge University Press. p. 291. ISBN 978-0-521-47436-8.
- Fanaroff, Bernard L., Riley Julia M.; Riley (May 1974). "The morphology of extragalactic radio sources of high and low luminosity". Monthly Notices of the Royal Astronomical Society. 167: 31P – 36P. Bibcode:1974MNRAS.167P..31F. doi:10.1093/mnras/167.1.31p.
{{cite journal}}: CS1 maint: multiple names: authors list (link) - "Dr Bernie Fanaroff - The Order of Mapungubwe in Silver". President of Zambia. Archived from the original on 7 October 2021. Retrieved 6 July 2021.
External links
- Webpage at Girton College
- Webpage at Cavendish Astrophysics Group Archived 15 January 2021 at the Wayback Machine
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