astronomy

OGLE-TR-10b

OGLE-TR-10b 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 OGLE-TR-10b rather than just read about it. In short: OGLE-TR-10b is an extrasolar planet orbiting the star OGLE-TR-10. The planet was first detected by the Optical Gravitational Lensing Experiment (OGLE) survey in 2002.

Key takeaways

OGLE-TR-10b belongs to astronomy; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect OGLE-TR-10b to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of OGLE-TR-10b from memory before moving on to harder problems.

Reference excerpt

OGLE-TR-10b is an extrasolar planet orbiting the star OGLE-TR-10. The planet was first detected by the Optical Gravitational Lensing Experiment (OGLE) survey in 2002. The star, OGLE-TR-10, was seen dimming by a tiny amount every three days. The transit lightcurve resembles that of HD 209458 b, the first transiting extrasolar planet. However, the mass of the object had to be measured by the radial velocity method because other objects like red dwarfs and brown dwarfs can mimic the planetary transit. In late 2004 it was confirmed as the fifth planetary discovery by OGLE. The planet is a typical "hot Jupiter", a planet with a mass half that of Jupiter and orbital distance only 1/24 that of Earth from the Sun. One revolution around the star takes a little over three days to complete. The planet is slightly larger than Jupiter, probably due to the heat from the star. OGLE-TR-10 was identified as a promising candidate by the OGLE team during their 2001 campaign in three fields towards the Galactic Center. The possible planetary nature of its companion was based on spectroscopic follow-up. A reported a tentative radial velocity semi-amplitude (from Keck-I/HIRES) of 100±43 m/s, and a mass for the putative planet of 0.7 ± 0.3 MJup was confirmed in 2004 with the UVES/FLAMES radial velocities. However, the possibility of a blend could not be ruled out. A blend scenario as an alternative explanation from an analysis combining all available radial velocity measurements with the OGLE light curve. OGLE-TR-10b has a mass of 0.68 ± 0.15 MJup and a radius of 1.72 ± 0.11 RJup. These parameters bear close resemblance to those of the first known transiting extrasolar planet, HD 209458 b. The planets with the longer periods in the hot Jupiter class all have small masses (~0.7 MJup), while all the short-period planets (i.e., very hot Jupiters) have masses roughly twice as large. This trend may be related to the survival of planets in proximity to their parent stars.

References

External links Media related to OGLE-TR-10b at Wikimedia Commons

OGLE transit data Geneva Observatory data Archived 2005-04-04 at the Wayback Machine

Illustrations

Worked examples

Example 1 — a first encounter with OGLE-TR-10b

Start with the simplest possible case. Write down what OGLE-TR-10b 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 OGLE-TR-10b 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 OGLE-TR-10b 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 OGLE-TR-10b

In research: OGLE-TR-10b 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 OGLE-TR-10b 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: OGLE-TR-10b is common in secondary-school and first-year university syllabi. It links to neighbouring topics Exoplanets discovered in 2002, Giant planets, Hot Jupiters, so understanding it makes those chapters shorter.
In everyday life: Look for OGLE-TR-10b 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 OGLE-TR-10b in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what OGLE-TR-10b 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 OGLE-TR-10b out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is OGLE-TR-10b in simple terms?

OGLE-TR-10b is an extrasolar planet orbiting the star OGLE-TR-10. The planet was first detected by the Optical Gravitational Lensing Experiment (OGLE) survey in 2002.

Why does OGLE-TR-10b 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 OGLE-TR-10b?

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 OGLE-TR-10b.