Final answer:
The Parkes Radio Telescope, also known as "The Dish," is used to detect radio emission from space, including synchrotron radiation. The Murchison Radio Observatory is an ideal location for radio telescopes due to its remote location and low radio interference. Walker discovers multiple radio galaxies beyond the Milky Way. The exact number and appearance of these radio galaxies depend on the specific image. After learning about Walker's exploration, questions may arise about black holes, magnetic fields, and recent discoveries in radio astronomy.
Step-by-step explanation:
The Parkes Radio Telescope, known as "The Dish," is used to detect radio emission from space. It has a large dish that collects radio waves and reflects them to a receiver for analysis. The telescope is able to observe synchrotron radiation, which is a special type of radiation emitted by charged particles as they move at nearly the speed of light in magnetic fields. Synchrotron radiation can be seen when charged particles, such as electrons, spiral around magnetic field lines and emit radiation.
The Murchison Radio Observatory, located in Western Australia, is an ideal place to build radio telescopes because of its remote location and low radio interference. It is situated in the southern hemisphere, which provides a unique view of the southern sky. The observatory is also part of the Murchison Widefield Array (MWA) project, which is a radio telescope array designed to study the early universe and cosmic reionization.
When Walker decides to explore beyond the Milky Way, she finds multiple radio galaxies in the image she shares. Radio galaxies are galaxies that emit strong radio waves due to the presence of active galactic nuclei (AGN). These AGN are powered by supermassive black holes at the center of the galaxies. The image may show different types of radio galaxies, such as extended radio galaxies with radio-emitting jets and lobes, or compact radio galaxies with a central radio source.
The number of radio galaxies seen in the image shared by Walker will depend on the specific image and observation. However, radio surveys often detect numerous radio galaxies across the sky. Each radio galaxy may have different characteristics in terms of size, shape, and brightness. Some may appear as extended diffuse sources with bright radio emission, while others may appear as compact sources with a concentrated radio emission.
After learning about Walker's exploration of galaxies, questions that may arise include:
- How do supermassive black holes in radio galaxies produce radio emissions?
- What is the role of magnetic fields in the formation of radio jets and lobes in extended radio galaxies?
- How do astronomers identify different types of radio galaxies?
- What are the recent discoveries and advancements in the field of radio astronomy?