astronomy

HIP 79431 b

HIP 79431 b 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 HIP 79431 b rather than just read about it. In short: HIP 79431 b is an extrasolar planet discovered by the W. M.

Key takeaways

HIP 79431 b belongs to astronomy; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect HIP 79431 b to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of HIP 79431 b from memory before moving on to harder problems.

Reference excerpt

HIP 79431 b is an extrasolar planet discovered by the W. M. Keck Observatory in 2010. The planet is found in an M type dwarf star catalogued as HIP 79431, and is located within the Scorpius constellation approximately 47 light years away from the Earth. Its orbital period lasts about 111.7 days and has an orbital eccentricity of 0.29. The planet is the 6th giant planet to be detected in the Doppler surveys of M dwarfs and is considered to be one of the most massive planets found around M dwarf stars. The planet HIP 79431 b is named Barajeel. The name was selected in the NameExoWorlds campaign by the United Arab Emirates, during the 100th anniversary of the IAU. A barajeel is a wind tower used to direct the flow of the wind so that air can be recirculated as a form of air conditioning.

Observations HIP 79431 b is located in orbit around a star whose metallicity had been challenging to be assessed due to the uncertainties within the molecular data line, however it has not been typical for M Dwarfs to have strong emissions from the core data lines. This led to the inclusion of the HIP 79431 star to the KECK program in April 2009 as part of the exoplanet studies for low mass stars. During this study, 13 Doppler measurements of the star were done over a 6-month period using the High Resolution Echelle Spectrometer (HIRES). The exposure times used in its observation was 600 seconds which yielded a signal-to-noise ratio of just under 100. Each program observation required the use of iodine absorption lines in order to model the wavelength scale as well as the instrumental profile of the telescope and spectrometer optics. The Doppler experiments derived radial velocities fit the Keplerian model showing an unambiguous signal and orbital parameters which best fit planetary gravitational pull, this revealed the presence of the planet HIP 79431 b. However, there is no evidence that any additional planets was found.

Low transit possibility The planet HIP 79431 b has a low transit probability mainly due to its semi-major axis orientation. Another observation with regard to its eccentricity orbit is that it brings the planet closer to its star periastron increasing the probability of a transit, which was estimated as a meager 0.5%. According to the KECK program, if a transit would occur, the depth would be remarkable mainly due to the calculated mass of the planet.

Worked examples

Example 1 — a first encounter with HIP 79431 b

Start with the simplest possible case. Write down what HIP 79431 b 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 HIP 79431 b 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 HIP 79431 b 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 HIP 79431 b

In research: HIP 79431 b 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 HIP 79431 b 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: HIP 79431 b is common in secondary-school and first-year university syllabi. It links to neighbouring topics Exoplanets discovered in 2009, Exoplanets with proper names, Giant planets, so understanding it makes those chapters shorter.
In everyday life: Look for HIP 79431 b 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 “HIP 79431 b” →

Affiliate

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

How to study HIP 79431 b in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what HIP 79431 b 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 HIP 79431 b out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is HIP 79431 b in simple terms?

HIP 79431 b is an extrasolar planet discovered by the W. M.

Why does HIP 79431 b 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 HIP 79431 b?

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 HIP 79431 b.