astronomy

Idit Zehavi

Idit Zehavi 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 Idit Zehavi rather than just read about it. In short: Idit Zehavi (Hebrew: עדית זהבי; born 1969) is an Israeli astrophysicist and researcher who discovered an anomaly in the mapping of the cosmos, which offered insight into how the universe is expanding. She is part of the team completing the Sloan Digital Sky Survey and is one of the world's most highly cited scientists according to the list published annually by Thomson Reuters.

Key takeaways

Idit Zehavi belongs to astronomy; place it in that map before memorising details.
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Reproduce the core statement of Idit Zehavi from memory before moving on to harder problems.

Reference excerpt

Idit Zehavi (Hebrew: עדית זהבי; born 1969) is an Israeli astrophysicist and researcher who discovered an anomaly in the mapping of the cosmos, which offered insight into how the universe is expanding. She is part of the team completing the Sloan Digital Sky Survey and is one of the world's most highly cited scientists according to the list published annually by Thomson Reuters.

Biography Idit Zehavi was born in Israel in 1969 and completed her education in Jerusalem, earning a PhD from the Racah Institute of Physics at the Hebrew University of Jerusalem in 1998. That same year, while researching the expansion of the universe, she and a colleague, Avishai Dekel, noted an anomaly in the cosmos which suggested that the portion of the galaxy where earth lies is expanding faster than the entirety of the universe. The findings were independently noted by another researcher, Adam Riess, from the University of California, Berkeley. Soon after, Zehavi moved to the United States to complete her post-doctorate studies in galaxy clustering at the University of Chicago and participate in research at the Fermi National Accelerator Laboratory. She left Fermilab in 2004 for the University of Arizona and continued working on the research of the Sloan Digital Sky Survey (SDSS). In 2005, she participated in research under the direction of Daniel Eisenstein, which detected "cosmic ripples", which confirmed the cosmological theory of the creation of the universe. In 2006, she joined Case Western Reserve University of Cleveland, Ohio, as an Associate Professor in the Astronomy Department. In 2009, Zehavi was awarded a grant from the U.S. National Science Foundation to continue her work with the SDSS to expand her work on galaxy clustering to encompass a larger scale view of the universe. According to the annual listing produced by Thomson Reuters, Zehavi is one of the world's most highly cited scientists.

Selected works Zaroubi, Saleem; Zehavi, Idit; Dekel, Avishai; et al. (September 1997). "Large-Scale Power Spectrum from Peculiar Velocities via Likelihood Analysis". The Astrophysical Journal. 486 (1): 21–31. arXiv:astro-ph/9610226. Bibcode:1997ApJ...486...21Z. doi:10.1086/304481. S2CID 1966279. Zehavi, Idit; Riess, Adam G; Kirshner, Robert P; Dekel, Avishai (1998). "A Local Hubble Bubble from Type 1a Supernovae". The Astrophysical Journal. 503 (2): 483. arXiv:astro-ph/9802252. Bibcode:1998ApJ...503..483Z. doi:10.1086/306015. S2CID 122223606. Zehavi, Idit; Blanton, Michael R; Frieman, Joshua A; et al. (2002). "Galaxy Clustering in Early Sloan Digital Sky Survey Redshift Data". The Astrophysical Journal. 571 (1): 172–190. arXiv:astro-ph/0106476. Bibcode:2002ApJ...571..172Z. doi:10.1086/339893. S2CID 119067270. Zehavi, Idit; Zheng, Zheng; Weinberg, David H; et al. (2005). "The Luminosity and Color Dependence of the Galaxy Correlation Function". The Astrophysical Journal. 630 (1): 1–27. arXiv:astro-ph/0408569v2. Bibcode:2005ApJ...630....1Z. doi:10.1086/431891. S2CID 14702969. Zehavi, Idit; Eisenstein, Daniel J; Nichol, Robert C; et al. (2005). "The Intermediate-Scale Clustering of Luminous Red Galaxies". The Astrophysical Journal. 621 (1): 22–31. arXiv:astro-ph/0411557. Bibcode:2005ApJ...621...22Z. doi:10.1086/427495. S2CID 14364108. Eisenstein, Daniel J; Zehavi, Idit; Hogg, David W; et al. (October–November 2005). "Detection of the Baryon Acoustic Peak in the Large-Scale Correlation Function of SDSS Luminous Red Galaxies". The Astrophysical Journal. 633 (2): 560–574. arXiv:astro-ph/0501171. Bibcode:2005ApJ...633..560E. doi:10.1086/466512. S2CID 4834543. Sheth, Ravi K; Zehavi, Idit (April 2009). "Linear theory and velocity correlations of clusters". Monthly Notices of the Royal Astronomical Society. 394 (3): 1459–1462. arXiv:0812.1037. Bibcode:2009MNRAS.394.1459S. doi:10.1111/j.1365-2966.2008.14326.x. S2CID 15189300. Guo, Hong; Zehavi, Idit; Zheng, Zheng (September–October 2012). "A New Method to Correct for Fiber Collisions in Galaxy Two-Point Statistics". The Astrophysical Journal. 756 (2): 127. arXiv:1111.6598. Bibcode:2012ApJ...756..127G. doi:10.1088/0004-637X/756/2/127. S2CID 118588769. Guo, Hong; Zehavi, Idit; Zheng, Zheng; et al. (2013). "The clustering of galaxies in the SDSS-III Baryon Oscillation Spectroscopic Survey: Luminosity and Color Dependence and Redshift Evolution". The Astrophysical Journal. 767 (2): 122. arXiv:1212.1211. Bibcode:2013ApJ...767..122G. doi:10.1088/0004-637X/767/2/122. S2CID 118440688. Guo, Hong; Zheng, Zheng; Zehavi, Idit; et al. (January 2014). "The clustering of galaxies in the SDSS-III Baryon Oscillation Spectroscopic Survey: modeling of the luminosity and colour dependence in the Data Release 10". Monthly Notices of the Royal Astronomical Society. 441 (3): 2398–2413. arXiv:1401.3009. Bibcode:2014MNRAS.441.2398G. doi:10.1093/mnras/stu763. S2CID 17587047.

References

External links WorldCat Publications Publications by Idit Zehavi at ResearchGate

Worked examples

Example 1 — a first encounter with Idit Zehavi

Start with the simplest possible case. Write down what Idit Zehavi 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 Idit Zehavi 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 Idit Zehavi 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 Idit Zehavi

In research: Idit Zehavi 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 Idit Zehavi 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: Idit Zehavi is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1969 births, 21st-century women scientists, Hebrew University of Jerusalem alumni, so understanding it makes those chapters shorter.
In everyday life: Look for Idit Zehavi 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 Idit Zehavi in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Idit Zehavi 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.
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Frequently asked questions

What is Idit Zehavi in simple terms?

Why does Idit Zehavi 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 Idit Zehavi?

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 Idit Zehavi.