astronomy

Tateos Agekian

Tateos Agekian 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 Tateos Agekian rather than just read about it. In short: Tateos Artemjevich Agekian (Armenian: Թադևոս Արտեմի Աղեկյան, Russian: Татеос Артемьевич Агекян; 12 May 1913 – 16 January 2006) was a Soviet astrophysicist of Armenian descent and one of the pioneers of Russian and world stellar dynamics. T.

Key takeaways

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

Reference excerpt

Tateos Artemjevich Agekian (Armenian: Թադևոս Արտեմի Աղեկյան, Russian: Татеос Артемьевич Агекян; 12 May 1913 – 16 January 2006) was a Soviet astrophysicist of Armenian descent and one of the pioneers of Russian and world stellar dynamics. T. A. Agekian found two evolutionary sequences of stellar systems: nearly spherical and strongly flattened. He suggested essentially a new method to investigate the structure and kinematics of the Milky Way Galaxy. Found a new estimate for the dissipation rate in stellar clusters. Gave an exhaustive analysis of the photogravitational interaction between stars and gas clouds. An asteroid (3862, "Agekian") was named in his honor.

Biography T. A. Agekian was born to an Armenian family in Batum in 1913. After graduating from the Leningrad University, in 1938, he began to work as a school teacher. After some years he began his post-graduate studies, but was interrupted because of World War II. Agekian participated in the war as chief of staff of an artillery regiment. After the demobilization, he returned to Leningrad University and worked at the Department of Stellar Astronomy. He received the degree of Candidate of Physical and Mathematical Sciences in 1947. In 1960, he became a Doctor of Physical and Mathematical Sciences and later he received the title of Professor. He was the Head of Laboratory of Stellar Dynamics and Celestial Mechanics of the Astronomical Institute of St. Petersburg University. He died on January 16, 2006, in Saint Petersburg.

Scientific activity Most of his work is connected with applying the methods of mathematical statistics and theory of random processes to stellar astronomy. In particular, studying the results of star and galaxy counts, he was able to separate the effects of real clustering and the effects due to a clumpy structure of the absorbing layer and to estimate the cluster parameters. Developing the theory of stellar encounters, T. A. Agekian found the probability of encounters with a given velocity change and studied the effect of the encounter multiplicity. These results gave him a possibility to find a new estimate for the dissipation rate in stellar clusters. In the studies of the influence of the stellar evaporation on the evolution of rotating systems, T. A. Agekian has discovered the existence of two evolutionary subsystems: the spherical and the flattened ones. Agekian gave an exhaustive analysis of the photogravitational interaction between stars and gas clouds. The results obtained provide a possible explanation for the phenomenon of the stellar velocity increase with age. Agekian initiated a numerical study of triple systems and a statistical analysis of results. Among other results, Agekian and his collaborators found the probabilities of capture and exchange. They proposed a classification of the states of triple systems. Agekian also studied the problem of motion in the field of an axially symmetrical potential, and being author of new methods, achieved some new results in this difficult topic. He was one of the pioneers of Stellar Dynamics. Since the 1970s, Agekian studied mainly the problem of motion in the field of an axially symmetrical potential. He proposed new methods and achieved some new results in the field.

References

Worked examples

Example 1 — a first encounter with Tateos Agekian

Start with the simplest possible case. Write down what Tateos Agekian 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 Tateos Agekian 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 Tateos Agekian 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 Tateos Agekian

In research: Tateos Agekian 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 Tateos Agekian 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: Tateos Agekian is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1913 births, 2006 deaths, Academic staff of Saint Petersburg State University, so understanding it makes those chapters shorter.
In everyday life: Look for Tateos Agekian 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.

Ask Teacher Smith questions about this articleOpens your AI tutor with a question about “Tateos Agekian” →

Affiliate

Preply — study more efficiently by working with a personal tutor. 50% off.

How to study Tateos Agekian in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Tateos Agekian 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 Tateos Agekian out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Tateos Agekian in simple terms?

Why does Tateos Agekian 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 Tateos Agekian?

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 Tateos Agekian.