How do Limb-Darkening curves differ at two different wavelengths?

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Thread starter AlphaCrucis
Start date Mar 2, 2021
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Astronomy Curves Spectrocopy Stars Stellar Wavelength Wavelengths

In summary, a Limb-Darkening curve is a graph used to study the variations in brightness of a star as it rotates and to understand its physical properties. These curves can differ at different wavelengths due to the presence of different elements in the star's atmosphere, making them significant in providing information about a star's temperature, chemical composition, and atmospheric structure. In exoplanet studies, Limb-Darkening curves are used to detect and study exoplanets, but there are limitations to their accuracy due to factors such as data quality and assumptions made in the analysis.

Mar 2, 2021

AlphaCrucis

TL;DR Summary: Wavelengths of lets say 4000 Angstroms and 7000 angstroms.

Does the limb-darkening curve fall off faster at shorter wavelengths or at longer wavelengths?

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Mar 3, 2021

phinds

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AlphaCrucis said:

Summary:: Wavelengths of let's say 4000 Angstroms and 7000 angstroms.

Does the limb-darkening curve fall off faster at shorter wavelengths or at longer wavelengths?

What research have you done on this? What have you found out?

1. What is a Limb-Darkening curve?

A Limb-Darkening curve is a graph that shows the variation in brightness of a star's surface as it is viewed from different angles. It is used to study the atmosphere of stars and can provide information about their temperature, composition, and other physical properties.

2. How do Limb-Darkening curves differ at two different wavelengths?

At different wavelengths, the Limb-Darkening curve can show different levels of variation in brightness. This is because different wavelengths of light interact with the atmosphere of a star in different ways, causing variations in the observed brightness. This can provide insight into the composition and structure of the star's atmosphere.

3. What is the significance of studying Limb-Darkening curves at different wavelengths?

Studying Limb-Darkening curves at different wavelengths can help us understand the physical properties of stars, such as their temperature, composition, and structure. It can also provide information about the processes happening in their atmospheres, such as convection and radiation.

4. How are Limb-Darkening curves measured at different wavelengths?

Limb-Darkening curves are measured using a technique called photometry, which involves measuring the amount of light emitted by a star at different wavelengths. This data is then used to create a graph of the star's brightness as a function of angle, which is the Limb-Darkening curve.

5. What are some applications of studying Limb-Darkening curves at different wavelengths?

Studying Limb-Darkening curves at different wavelengths has many applications in astronomy, including determining the properties of stars, studying the atmospheres of exoplanets, and understanding the processes that occur in stellar atmospheres. It is also used in the search for habitable planets and in the study of stellar evolution.