Book contents
- Frontmatter
- Contents
- Preface
- Introduction
- 1 Distances of Quasars
- 2 The Battle Over Statistics
- 3 Galaxies Visibly Connected to Quasars
- 4 Certain Galaxies with Many Quasars
- 5 Distribution of Quasars in Space
- 6 Galaxies with Excess Redshift
- 7 Small Excess Redshifts, the Local Group of Galaxies, and Quantization of Redshifts
- 8 Correcting Intrinsic Redshifts and Identifying Hydrogen Clouds Within Nearby Groups of Galaxies
- 9 Ejection from Galaxies
- 10 The Sociology of the Controversy
- 11 Interpretations
- Glossary
- Index
4 - Certain Galaxies with Many Quasars
Published online by Cambridge University Press: 01 June 2011
- Frontmatter
- Contents
- Preface
- Introduction
- 1 Distances of Quasars
- 2 The Battle Over Statistics
- 3 Galaxies Visibly Connected to Quasars
- 4 Certain Galaxies with Many Quasars
- 5 Distribution of Quasars in Space
- 6 Galaxies with Excess Redshift
- 7 Small Excess Redshifts, the Local Group of Galaxies, and Quantization of Redshifts
- 8 Correcting Intrinsic Redshifts and Identifying Hydrogen Clouds Within Nearby Groups of Galaxies
- 9 Ejection from Galaxies
- 10 The Sociology of the Controversy
- 11 Interpretations
- Glossary
- Index
Summary
If a few quasars belong to some nearby galaxies, where do the majority of quasars belong? Over three thousand quasars are known now; most of them are spread over large areas of the sky where it is not immediately apparent that they are associated with any particular galaxy. One obvious answer might be, for example, that most quasars were ejected away from their galaxies of origin to mingle somewhere in intergalactic space. Perhaps only a few have been ejected so weakly that they orbit around their galaxy of origin. Perhaps only a few are seen close to the moment of their emergence, where they still show an umbilical attachment to their parent galaxy. But it is possible that sometimes a galaxy might eject many quasars and might be caught in the act of doing this. Could it have been predicted that some galaxies had many associated quasars? If so, it also might have been predicted that they would be encountered unexpectedly.
The Galaxy with the Longest Known Optical Jets, NGC 1097
In 1974, I was sitting at a viewing machine in Edinburgh, systematically scanning deep plates of the southern sky taken with the Schmidt telescope in Australia. This was part of a more than ten-year project with Barry Madore that culminated with the publication in 1987 of a two-volume Catalog of Southern Peculiar Galaxies and Associations. Someone from the Schmidt Telescope Unit brought me a deep plate of another region.
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- Information
- Quasars, Redshifts and Controversies , pp. 47 - 62Publisher: Cambridge University PressPrint publication year: 1988