astronomy

HD 95086 b

HD 95086 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 HD 95086 b rather than just read about it. In short: HD 95086 b, formally named Levantes, is a confirmed, directly imaged exoplanet orbiting the young, 17 Myr A-class pre-main-sequence star HD 95086. It is roughly 5 times as massive as Jupiter and orbits about 70 AU away from the parent star.

Key takeaways

HD 95086 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 HD 95086 b to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of HD 95086 b from memory before moving on to harder problems.

Reference excerpt

HD 95086 b, formally named Levantes, is a confirmed, directly imaged exoplanet orbiting the young, 17 Myr A-class pre-main-sequence star HD 95086. It is roughly 5 times as massive as Jupiter and orbits about 70 AU away from the parent star. It was detected at thermal infrared wavelengths (3.8 μm) through direct imaging, using the NACO instrument on the VLT. A debris disk has been detected in this system at submillimeter wavelengths and has been resolved in the far-infrared from data obtained with the Herschel Space Observatory. The host star was considered a highly probable member of the Lower Centaurus Crux star forming region, until tentatively reassigned with 71% probability to the Carina association. The star has a mass of 1.6 solar masses making it a late A type star. It is located approximately 90 parsecs away in the constellation of Carina.

Nomenclature In August 2022, this planet and its host star were included among 20 systems to be named by the third NameExoWorlds project. The approved names, proposed by a team from Greece, were announced in June 2023. HD 95086 b is named Levantes, from a modern Greek word referring to easterly Mediterranean winds, and its host star is named Aiolos after a Greek mythological figure.

Discovery The planet was initially detected in data taken in 2012 at a separation from the parent star of 623.9 ± 7.4 mas (~56 AU) and position angle of 151.8 ± 0.8 degrees. The planet was recovered at a high signal-to-noise ratio in June 2013. Astrometry for the planet in January 2012 and June 2013, and from a marginal detection in March 2013 confirm that it is bound to the parent star, not a background star. HD 95086 b's brightness at 3.8 μm when combined with sensitive upper limits on its brightness at shorter wavelengths is consistent with trends seen for other young, directly imaged planets like those around HR 8799. In particular, the lower limit of its 1.65–3.8 μm color of 3.1 magnitudes excludes background stars and most brown dwarfs. Spatially resolved images of the system from the Herschel Space Observatory show evidence for a possible 2 belt system with a large clearing between the belts, similar to HR 8799. HD 95086 b is probably responsible for carving the sharp inner edge of the outer disk, but additional planets in this system occupying the rest of the gap may be a strong possibility.

Physical properties HD 95086 b is a massive planet that exists at a large orbital radius, therefore it is a viable candidate for a planet that formed close to its host star and was later scattered outwards via gravitational interactions with other massive particles in orbit around the star. In a debris disk, these particles are of the form of other orbiting planets or planetesimals. This scattering mechanism has been investigated for particles of the form of over-dense fluid elements like those found in a protoplanetary disk containing a planet. It has been proposed that scattering events could explain observed massive planets at large orbital radii. The atmosphere of HD 95086 b contains large amounts of dust, probably small, sub-micrometer forsterite grains. The planet is very red in color, possibly due to the presence of the circumplanetary disk. Coronagraphic imaging with MIRI observations disfavour the presence of a circumplanetary disk.

References

Illustrations

Worked examples

Example 1 — a first encounter with HD 95086 b

Start with the simplest possible case. Write down what HD 95086 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 HD 95086 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 HD 95086 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 HD 95086 b

In research: HD 95086 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 HD 95086 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: HD 95086 b is common in secondary-school and first-year university syllabi. It links to neighbouring topics Exoplanets detected by direct imaging, Exoplanets discovered in 2013, Exoplanets with proper names, so understanding it makes those chapters shorter.
In everyday life: Look for HD 95086 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.

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How to study HD 95086 b in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what HD 95086 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 HD 95086 b out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is HD 95086 b in simple terms?

Why does HD 95086 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 HD 95086 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 HD 95086 b.