astronomy

IERS B1946+708

IERS B1946+708 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 IERS B1946+708 rather than just read about it. In short: IERS B1946+708 is a radio galaxy located in the constellation of Draco. It has a redshift of (z) 0.101, identified by emission lines in its optical spectrum, estimating it to be 1.25 billion light-years away. and was first discovered as an extragalactic radio source by astronomers in 1983.

Key takeaways

IERS B1946+708 belongs to astronomy; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect IERS B1946+708 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of IERS B1946+708 from memory before moving on to harder problems.

Reference excerpt

IERS B1946+708 is a radio galaxy located in the constellation of Draco. It has a redshift of (z) 0.101, identified by emission lines in its optical spectrum, estimating it to be 1.25 billion light-years away. and was first discovered as an extragalactic radio source by astronomers in 1983. This object is classified as a compact symmetric object (CSO) in literature, but also has a gigahertz peaked spectrum.

Description IERS B1946+708 is described as an elliptical galaxy. It is known to have a disk described as inclined with a measurement of 600 parsecs in radius based on three-band imaging by Hubble Space Telescope. The nuclear regions of the galaxy are depicted to be much redder compared to its outer regions with B and R band magnitudes of 2-3. A companion galaxy can be seen 67 kiloparsecs away from it. The source of IERS B1946+708 is known to be compact. It is described as having an S-symmetry with its radio core located halfway in the middle of two hotspots located in north and south directions. The hotspots are estimated to have an expansion velocity of 0.024c which corresponds to the age of 4000 ± 1000 years while the core has an inverted spectrum. Two narrow jets are found emerging from the core, subsequently bending and ending in the hotspot regions. These jets are known to contain four components which are found to move at speeds of between 0.6 and 0.9c with the fastest component having a velocity of 1.09 h−1 c. Low polarization have also been observed in the jet components of IERS B1946+708 indicating Faraday depolarization by ionized gas and a tangled magnetic field. Neural hydrogen have also been detected in all of the components, with narrow lines evidently present towards the north hotspot likely caused by H I clouds associating with a warm region of gas. X-ray observations by BeppoSAX found IERS B1946+708 has a strong presence of iron K-alpha emission lines in its spectrum. H I observations conducted by A.B. Peck and G.B. Taylor, found the source has multi-peaked absorption throughout its radio continuum with the maximum column density located towards the core, displaying velocity dispersion of 350 kilometers per seconds. This suggests IERS B1946+708 has a circumnuclear disk.

References

External links IERS B1946+708 on SIMBAD IERS B1946+708 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images

Illustrations

Worked examples

Example 1 — a first encounter with IERS B1946+708

Start with the simplest possible case. Write down what IERS B1946+708 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 IERS B1946+708 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 IERS B1946+708 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 IERS B1946+708

In research: IERS B1946+708 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 IERS B1946+708 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: IERS B1946+708 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Active galaxies, Astronomical objects discovered in 1983, Draco (constellation), so understanding it makes those chapters shorter.
In everyday life: Look for IERS B1946+708 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 IERS B1946+708 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what IERS B1946+708 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 IERS B1946+708 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is IERS B1946+708 in simple terms?

Why does IERS B1946+708 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 IERS B1946+708?

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 IERS B1946+708.