science

Wolf 1346

Wolf 1346 is a science 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 Wolf 1346 rather than just read about it. In short: Wolf 1346, otherwise known as HD 340611 and WD 2032+248, is a star in the northern constellation of Vulpecula. With an apparent magnitude of 11.546, it is too faint to be seen by the naked eye but can be observed using a telescope with an aperture of 51 mm (2.0 in) or larger.

Key takeaways

Wolf 1346 belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Wolf 1346 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Wolf 1346 from memory before moving on to harder problems.

Reference excerpt

Wolf 1346, otherwise known as HD 340611 and WD 2032+248, is a star in the northern constellation of Vulpecula. With an apparent magnitude of 11.546, it is too faint to be seen by the naked eye but can be observed using a telescope with an aperture of 51 mm (2.0 in) or larger. It is located at a distance of approximately 48.4 light-years (14.8 pc) according to Gaia EDR3 parallax measurements, and is receding from the Sun at a heliocentric radial velocity of +71.0 km/s.

Properties This is a young, non-magnetic white dwarf with an age of 60 million years. It is a little less than two-thirds the mass of the Sun and just 1.4% the radius, that is 1.5 times the size of Earth or 9,670 km (6,010 mi). With an effective temperature of 21,608 K (21,335 °C; 38,435 °F), it shines with 3.3% of the Sun's luminosity. It belongs to the thin disk of the Milky Way. There is marginal indication that the star is orbited by a binary companion. It has the spectral type DA2.4, indicating that the atmosphere is dominated by hydrogen, which is the only element whose spectral lines show up in the star's visible spectrum. It has been subject to multiple ultraviolet spectroscopic observations. Silicon lines were discovered in 1984 from spectra obtained by the International Ultraviolet Explorer. The abundance of silicon in the photosphere has been measured at log(Si/H)=−7.5 ± 0.2, which, compared to the solar value of log(Si/H)=−4.5, is approximately one thousand times less. This amount is comparable to what is expected from radiative levitation. Carbon, nitrogen, and oxygen are absent in the spectra, consistent with theories of element diffusion. Observations by the Hopkins Ultraviolet Telescope revealed that the Lyman-beta line shows signs of the dihydrogen cation (H2+), which, in cooler DA white dwarfs, causes similar signatures in the Lyman-alpha line.

Notes

References

Illustrations

Worked examples

Example 1 — a first encounter with Wolf 1346

Start with the simplest possible case. Write down what Wolf 1346 claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, 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 Wolf 1346 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 Wolf 1346 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 Wolf 1346

In research: Wolf 1346 appears in science 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 Wolf 1346 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: Wolf 1346 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Gliese and GJ objects, Henry Draper Catalogue objects, Hipparcos objects, so understanding it makes those chapters shorter.
In everyday life: Look for Wolf 1346 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 Wolf 1346 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Wolf 1346 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 Wolf 1346 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Wolf 1346 in simple terms?

Why does Wolf 1346 matter?

Because it connects several science 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 Wolf 1346?

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 Wolf 1346.