<transcript><audio_31> del perfil de línea, pero a lo largo del tiempo. Y esto que tenemos al lado izquierdo, pues básicamente es cómo cambia el perfil de línea. Esta es una línea dinámica</transcript><caption><image_32>The image is a screenshot of a presentation slide on a computer screen. The slide is titled "Cómo observar estrellas variables?" which translates to "What are the variables in the variables?" in English. 

The slide has a green background with white text. On the left side of the slide, there is a line graph that shows the relationship between the variables and their properties. The graph is divided into two sections. The x-axis represents the time period, while the y-axis indicates the percentage of variables.

At the top of the screen, there are two buttons, one for the user's name and the other for the date and time of the presentation. The text is written in a serif font and is in Spanish.</caption><transcript><audio_33> ah no, perdón, H-beta, para una estrella supergigante azul. Una estrella supergigante azul, estamos hablando de una temperatura de alrededor de 40.000 grados Kelvin en su superficie,</transcript><transcript><audio_34> las únicas líneas que nosotros observamos en este tipo de estrellas son líneas de hidrógeno. Entonces, no sé si alcanzan a ver cómo cambia la</transcript><transcript><audio_35> línea para los diferentes tiempos. Del lado derecho, estos números nos indican los días julianos, por ejemplo, ¿qué es? A 10.642.33.</transcript><transcript><audio_36> pues tenemos .3 días, que más o menos equivaldría como a... .3 días, ¿a cuánto equivale? ¿Cuántas horas equivale? .1 serían...</transcript><caption><image_37>The image is a screenshot of a presentation slide in Spanish. The slide is titled "Cómo observar estrellas variables?" which translates to "How to observe variables variables?" in English. 

The slide has a green background with white text. On the left side of the slide, there is a line graph that shows the relationship between different variables. The graph is divided into different sections, each representing a different variable. The x-axis represents the time period, while the y-axis indicates the value of the variables.

At the bottom of the screen, there are several buttons and menus, including a search bar, a menu bar, and a power button.</caption><transcript><audio_38> 8 horas 8 horas no ¿dónde?</transcript><transcript><audio_39> En la parte de abajo tenemos longitud de onda en Amstrons. Entonces, bueno, medimos cómo cambia el perfil de línea. Hay diferentes formas de medir la variabilidad de un perfil de línea.</transcript> what we can do is line profile variability but over time and what we have on the left side is basically how the profile changes  line this is an absorption line the helium line ah no sorry h beta for a blue supergiant star h beta for a blue supergiant star to a blue supergiant star we are talking about a temperature of around 40,000 degrees kelvin on its surface and then basically the only lines that we observe  In this type of stars they are hydrogen lines. Yes, then I do n't know if you can see how the structure of the line profile changes for the different times on the right side. These numbers indicate the for example, it is 10,642 points. 37 to 10 thousand 642 points 60 well we have point three days which would more or less be equivalent to point one would be like 4 hours eight hours eight hours no where are like around eight hours yes in  the lower part we have wavelength in amstrong so well we measure how the line profile changes there are different ways to measure the variability of a line profile one
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