chemistry

Mayrit 1701117

Mayrit 1701117 is a chemistry 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 Mayrit 1701117 rather than just read about it. In short: Mayrit 1701117 (M1701117) is a proto-brown dwarf launching a large (0.8 light-years, 0.26 parsec) Herbig-Haro object, called HH 1165. Previously only small micro-jets (≤0.03 parsec) were known from young proto-brown dwarfs.

Key takeaways

Mayrit 1701117 belongs to chemistry; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Mayrit 1701117 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Mayrit 1701117 from memory before moving on to harder problems.

Reference excerpt

Mayrit 1701117 (M1701117) is a proto-brown dwarf launching a large (0.8 light-years, 0.26 parsec) Herbig-Haro object, called HH 1165. Previously only small micro-jets (≤0.03 parsec) were known from young proto-brown dwarfs. Mayrit 1701117 was discovered in 2008 in the Mayrit catalogue by J. A. Caballero. The Mayrit catalogue is a list of stars and high-mass brown dwarfs in the Sigma Orionis cluster. The catalogue uses DENIS and 2MASS data. Later, the source was detected in H-alpha with the ESO Schmidt telescope at La Silla and catalogued as ESO-HA 1736. The central object has a mass of around 0.04–0.08 M☉ and will most likely evolve into a brown dwarf. The central object is surrounded by a H-alpha halo with a clumpy distribution, which could be due to wind-envelope interactions. The southeastern tail of the H-alpha emission is likely reflecting the light from the nearby star HR 1950. The mass of the central source was later estimated to be around 40 MJ and the system is 30,000-40,000 years old.

The disk and outflow

Observations at the Calar Alto 3.5-m telescope were used to measure an accretion rate of 6.4×10−10 M☉/year and an outflow rate of 10−9 M☉/year, similar to class I protostars. The researchers also obtained observations with the James Clerk Maxwell Telescope and find that the total envelope+disk mass is around 36 MJ. VLT/UVES observations do show signs of strong accretion and outflow and the estimated outflow rate is higher than the previous estimate at (35±17)×10−10 M☉/year. Observations with ALMA detected a pseudo-disk. According to core-collapse models, infalling material will form a flattened disk-like structure, which is called pseudo-disk. This pseudo-disk is rotating and surrounds the Keplerian disk. The pseudo-disk in Mayrit 1701117 has a size of 165–192 AU and a mass of around 0.02 M☉. Emission by H2CO likely traces the Keplerian disk and N2D+ traces a clump close to this disk. Using ALMA the researchers determined the total mass of the circumstellar material as 20.98±1.24 MJ. In 2017 a large Herbig-Haro object was discovered with SOAR narrow-band imaging. The Herbig-Haro object was named HH 1165 and the jet shows a bent C-shape, multiple knots and fragmented bow shocks at the end of the jets. The jet is mostly detected in sulfur [S II] emission, showing 8 knots in the northwestern direction. A fainter counter-jet in the southeastern direction shows only two knots. The multiple knots can be seen as individual ejection events. The H-alpha image shows a bright scattered emission next to the jet, likely tracing the outflow cavity. The northwest part resembles a classical jet running into a neutral medium, but the southern part resembles an externally irradiated jet.

References

External links Punching Above Its Weight, press release by NOAO Punching above its weight, a brown dwarf launches a parsec-scale jet, press release by MPE

Illustrations

Worked examples

Example 1 — a first encounter with Mayrit 1701117

Start with the simplest possible case. Write down what Mayrit 1701117 claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In chemistry, 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 Mayrit 1701117 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 Mayrit 1701117 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 Mayrit 1701117

In research: Mayrit 1701117 appears in chemistry 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 Mayrit 1701117 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: Mayrit 1701117 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Brown dwarfs, Herbig–Haro objects, Orion (constellation), so understanding it makes those chapters shorter.
In everyday life: Look for Mayrit 1701117 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 Mayrit 1701117 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Mayrit 1701117 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 Mayrit 1701117 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Mayrit 1701117 in simple terms?

Why does Mayrit 1701117 matter?

Because it connects several chemistry 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 Mayrit 1701117?

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 Mayrit 1701117.