An oddball star 4000 light-years away emits a natural maser. Astronomers followed it to its source to learn more about the unusual star.
Eventually, scientists figured out that the maser was coming from hydroxide molecules, and now we know of hundreds of masers coming from different types of objects in space. A team of researchers used MWC 349A’s maser to study the star’s disk in greater detail than ever.“light amplification by stimulated emission of radiation,”The main difference is that a maser uses the microwave portion of the electromagnetic spectrum while a laser uses the optical light portion of the EM spectrum.
MWC 349A is known as an oddball. It has unique features, including being one of the brightest radio sources in the sky. It’s also one of the best examples of a massive star surrounded by athat produces an outflow. One of the puzzles around the star is its age. It’s a luminous star that has both high mass loss and a surrounding disk of material. Those traits are shared by both young, pre-main sequence stars and older, highly-evolved stars.
. It detects microwave range radiation produced by MWC 349A’s maser, and the researchers traced the microwaves back to their source to study the star in more detail. A maser’s bright emissions act like a probe that can be used to study the source. This artist’s impression shows the surroundings of a supermassive black hole. The black hole itself is surrounded by a brilliant accretion disc of very hot, infalling material and, further out, a dusty torus. There are also often high-speed jets of material ejected at the black hole’s poles that can extend huge distances into space. The powerful magnetic fields near black holes are tied to the jets, but the details are unclear. Image Credit: Harvard Centre for Astrophysics.
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