astronomy

WISEPA J184124.74+700038.0

WISEPA J184124.74+700038.0 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 WISEPA J184124.74+700038.0 rather than just read about it. In short: WISEPA J184124.74+700038.0 (designation is abbreviated to WISE 1841+7000) is a binary system of brown dwarfs of spectral classes T5 + T5, located in constellation Draco at approximately 131 light-years from Earth. It is notable for being one of the first known binary brown dwarf systems.

Key takeaways

WISEPA J184124.74+700038.0 belongs to astronomy; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect WISEPA J184124.74+700038.0 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of WISEPA J184124.74+700038.0 from memory before moving on to harder problems.

Reference excerpt

WISEPA J184124.74+700038.0 (designation is abbreviated to WISE 1841+7000) is a binary system of brown dwarfs of spectral classes T5 + T5, located in constellation Draco at approximately 131 light-years from Earth. It is notable for being one of the first known binary brown dwarf systems.

Discovery WISE 1841+7000 was discovered in 2011 from data, collected by Wide-field Infrared Survey Explorer (WISE) Earth-orbiting satellite—NASA infrared-wavelength 40 cm (16 in) space telescope, which mission lasted from December 2009 to February 2011. WISE 1841+7000A has two discovery papers: Gelino et al. (2011) and Kirkpatrick et al. (2011). Gelino et al. examined for binarity nine brown dwarfs using Laser Guide Star Adaptive Optics system (LGS-AO) on Keck II telescope on Mauna Kea; seven of these nine brown dwarfs were also newfound, including WISE 1841+7000. These observations had indicated that two of these nine brown dwarfs, including WISE 1841+7000, are binary. Kirkpatrick et al. presented discovery of 98 new found by WISE brown dwarf systems with components of spectral types M, L, T and Y, among which also was WISE 1841+7000.

Discovery of companion Component B of the system was discovered in 2011 Gelino et al. with Laser Guide Star Adaptive Optics system (LGS-AO) on Keck II telescope. It was presented in the same article as the component A.

Distance Trigonometric parallax of WISE 1841+7000 is not yet measured. Therefore, there are only distance estimates of this object, obtained by indirect spectrofotometric means (see table). WISE 1841+7000 distance estimates

Non-trigonometric distance estimates are marked in italic. The best estimate is marked in bold.

See also The other eight objects, checked for binarity by Gelino et al. (2011) on Keck II:

binarity found: WISE 0458+6434 (T8.5 + T9.5, component A discovered before by Mainzer et al. (2011)) binarity not found: WISE 0750+2725 (T8.5, newfound) WISE 1322-2340 (T8, newfound) WISE 1614+1739 (T9, newfound) WISE 1617+1807 (T8, discovered before by Burgasser et al. (2011)) WISE 1627+3255 (T6, newfound) WISE 1653+4444 (T8, newfound) WISE 1741+2553 (T9, newfound)

Notes

References

Illustrations

Worked examples

Example 1 — a first encounter with WISEPA J184124.74+700038.0

Start with the simplest possible case. Write down what WISEPA J184124.74+700038.0 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 WISEPA J184124.74+700038.0 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 WISEPA J184124.74+700038.0 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 WISEPA J184124.74+700038.0

In research: WISEPA J184124.74+700038.0 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 WISEPA J184124.74+700038.0 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: WISEPA J184124.74+700038.0 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Binary stars, Brown dwarfs, Draco (constellation), so understanding it makes those chapters shorter.
In everyday life: Look for WISEPA J184124.74+700038.0 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 WISEPA J184124.74+700038.0 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what WISEPA J184124.74+700038.0 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 WISEPA J184124.74+700038.0 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is WISEPA J184124.74+700038.0 in simple terms?

Why does WISEPA J184124.74+700038.0 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 WISEPA J184124.74+700038.0?

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 WISEPA J184124.74+700038.0.