astronomy

Kenneth Kellermann

Kenneth Kellermann is a astronomy topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Kenneth Kellermann rather than just read about it. In short: Kenneth Irwin Kellermann (born July 1, 1937) is an American astronomer at the National Radio Astronomy Observatory. He is best known for his work on quasars.

Key takeaways

Kenneth Kellermann belongs to astronomy; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Kenneth Kellermann to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Kenneth Kellermann from memory before moving on to harder problems.

Reference excerpt

Kenneth Irwin Kellermann (born July 1, 1937) is an American astronomer at the National Radio Astronomy Observatory. He is best known for his work on quasars. He won the Helen B. Warner Prize for Astronomy of the American Astronomical Society in 1971, and the Bruce Medal of the Astronomical Society of the Pacific in 2014. Kellerman was a member of the National Academy of Sciences, the American Academy of Arts and Sciences, and the American Philosophical Society. Kellermann was born in New York City to Alexander Kellermann and Rae Kellermann (née Goodstein). His paternal grandparents emigrated from Hungary and his maternal grandparents from Romania.

Publications Kellermann, K. I. (2014). "The Road to Quasars". Proceedings of the International Astronomical Union. 10: 190–195. arXiv:1412.7867. doi:10.1017/S1743921315002185. S2CID 118625572. Kellermann, K. I. (2014). "Radio evidence for AGN activity: Relativistic jets as tracers of SMBHS". Proceedings of the International Astronomical Union. 10: 3–12. arXiv:1412.7866. doi:10.1017/S1743921315007383. S2CID 117013940. Kellermann, K. I. (2013). "The Discovery of Quasars". Bulletin of the Astronomical Society of India. 41 (1): 1. arXiv:1304.3627. Bibcode:2013BASI...41....1K. Direct Link Kellermann, K. I. (2012). "Early Parkes Observations of Planets and Cosmic Radio Sources". arXiv:1210.0984 [astro-ph.IM]. Kellermann, K. I.; Cordes, J. M.; Ekers, R. D.; Lazio, J.; Wilkinson, P. (2009). "The exploration of the unknown". Astro2010: The Astronomy and Astrophysics Decadal Survey. 2010: 154. arXiv:0912.4441. Bibcode:2009astro2010S.154K. Kellermann, K. I.; Fomalont, E. B.; Mainieri, V.; Padovani, P.; Rosati, P.; Shaver, P.; Tozzi, P.; Miller, N. (2008). "The VLA Survey of the Chandra Deep Field South: I. Overview of the Radio Data". The Astrophysical Journal Supplement Series. 179 (1): 71. arXiv:0806.0843. Bibcode:2008ApJS..179...71K. doi:10.1086/591055. S2CID 16000090. Kellermann, K. I.; Lister, M. L.; Homan, D. C.; Kovalev, Y. Y.; Kadler, M.; Cohen, M. C. (2009). "Kinematics of AGN and Quasar Jets". ASP Conf. Ser. 402 (2009): 173–178. arXiv:0803.1301. Bibcode:2009ASPC..402..173K. Kellermann, K. I.; Kovalev, Y. Y.; Lister, M. L.; Homan, D. C.; Kadler, M.; Cohen, M. H.; Ros, E.; Zensus, J. A.; Vermeulen, R. C.; Aller, M. F.; Aller, H. D. (2007). "Doppler Boosting, Superluminal Motion, and the Kinematics of AGN Jets". Astrophysics and Space Science. 311 (1–3): 231–239. arXiv:0708.3219. Bibcode:2007Ap&SS.311..231K. doi:10.1007/s10509-007-9622-5. S2CID 18756984. Kellermann, K. I.; Lister, M. L.; Homan, D. C.; Vermeulen, R. C.; Cohen, M. H.; Ros, E.; Kadler, M.; Zensus, J. A.; Kovalev, Y. Y. (2004). "Sub-milliarcsecond Imaging of Quasars and Active Galactic Nuclei III. Kinematics of Parsec-Scale Radio Jets". The Astrophysical Journal. 609 (2): 539. arXiv:astro-ph/0403320. Bibcode:2004ApJ...609..539K. doi:10.1086/421289. S2CID 33835906. Kellermann, K. I. (2003). "Variability, Brightness Temperature, Superluminal Motion, Doppler Boosting, and Related Issues". Radio Astronomy at the Fringe. 300: 185. arXiv:astro-ph/0304165. Bibcode:2003ASPC..300..185K. Kellermann, K. I.; Lister, M. L.; Homan, D. C.; Ros, E.; Zensus, J. A.; Cohen, M. H.; Russo, M.; Vermeulen, R. C. (2002). "Superluminal Motion and Relativistic Beaming in Blazar Jets". High Energy Blazar Astronomy. 299: 117. arXiv:astro-ph/0211398. Bibcode:2003ASPC..299..117K. Kellermann, K. I.; Richards, E. A. (1999). "The Nature of Microjansky Radio Sources and Implications for the Design of the Next Generation Very Sensitive Radio Telescopes". Perspectives on Radio Astronomy: Science with Large Antenna Arrays: 157. arXiv:astro-ph/9909083. Bibcode:2000pras.conf..157K. Kellermann, K. I.; Vermeulen, R. C.; Zensus, J. A.; Cohen, M. H. (1998). "Sub-milliarcsecond Imaging of Quasars and AGN". The Astronomical Journal. 115 (4): 1295. arXiv:astro-ph/9801010. Bibcode:1998AJ....115.1295K. doi:10.1086/300308. S2CID 119076424.

References

Illustrations

Worked examples

Example 1 — a first encounter with Kenneth Kellermann

Start with the simplest possible case. Write down what Kenneth Kellermann claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In astronomy, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Kenneth Kellermann before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Kenneth Kellermann ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Kenneth Kellermann

In research: Kenneth Kellermann appears in astronomy research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Kenneth Kellermann in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Kenneth Kellermann is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1937 births, 21st-century American Jews, American astronomer stubs, so understanding it makes those chapters shorter.
In everyday life: Look for Kenneth Kellermann outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Kenneth Kellermann in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Kenneth Kellermann means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Kenneth Kellermann out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Kenneth Kellermann in simple terms?

Kenneth Irwin Kellermann (born July 1, 1937) is an American astronomer at the National Radio Astronomy Observatory. He is best known for his work on quasars.

Why does Kenneth Kellermann matter?

Because it connects several astronomy ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Kenneth Kellermann?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Kenneth Kellermann.