astronomy

Mario Hamuy

Mario Hamuy 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 Mario Hamuy rather than just read about it. In short: Mario Andrés Hamuy Wackenhut (born 1960) is a Chilean Astronomer and Professor of Astronomy at the University of Chile and Cerro Calan Observatory. He is well known for his observational work on all classes of supernovae, especially the use of Type Ia and Type II supernovae as measures of cosmic distance.

Key takeaways

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

Reference excerpt

Mario Andrés Hamuy Wackenhut (born 1960) is a Chilean Astronomer and Professor of Astronomy at the University of Chile and Cerro Calan Observatory. He is well known for his observational work on all classes of supernovae, especially the use of Type Ia and Type II supernovae as measures of cosmic distance.

Career Mario Hamuy is the son of Mario Hamuy Berr, an economist and politician of Syrian descent. He studied at Instituto Nacional General José Miguel Carrera of Santiago. Hamuy was a student in astronomy and physics at the University of Chile working with Jorge Melnick. In February 1987, he came to the Cerro Tololo Inter-American Observatory and within a few days of his arrival when the Type II supernova SN1987A exploded in the Large Magellanic Cloud, he began a major campaign at CTIO to monitor this important supernova. In 1989, in collaboration with Jose Maza, Mark M. Phillips, and Nicholas Suntzeff, he began the Calán/Tololo Supernova Survey which led to the pioneering work on the standard candle luminosities of Type Ia supernovae. This work led to the precise measurements of the Hubble Constant H0 and the deceleration parameter q0, the latter indicating the presence of a dark energy or cosmological constant dominating the mass/energy of the Universe. In graduate school at the University of Arizona at the Steward Observatory working with Professor Phil Pinto, he changed his focus to the study of core collapse supernovae, in particular using Type II supernovae to measure geometric distances using the expanding photosphere method (EPM). With Pinto, he invented a semi-empirical method to measure distances to Type II events, called the Standard Candle method, which improved the distance accuracies over EPM.

Awards and honors Asteroid 109097 Hamuy, discovered by Spanish astronomer Rafael Ferrando at the Pla D'Arguines Observatory (941) in 2001, was named after him. The official naming citation was published by the Minor Planet Center on 18 February 2011 (M.P.C. 73984). In 2015 he won the National Prize for Exact Sciences. He is also the president of CONICYT, the Chilean government's scientific research agency and a recipient of the 2016 TWAS Prize.

References

External links Mario Hamuy, directory page at Universidad de Chile Mario Hamuy, directory page at the IAU

Illustrations

Worked examples

Example 1 — a first encounter with Mario Hamuy

Start with the simplest possible case. Write down what Mario Hamuy 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 Mario Hamuy 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 Mario Hamuy 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 Mario Hamuy

In research: Mario Hamuy 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 Mario Hamuy 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: Mario Hamuy is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1960 births, 20th-century astronomers, 21st-century astronomers, so understanding it makes those chapters shorter.
In everyday life: Look for Mario Hamuy 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 Mario Hamuy in 20 minutes

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

Frequently asked questions

What is Mario Hamuy in simple terms?

Why does Mario Hamuy 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 Mario Hamuy?

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 Mario Hamuy.