Written by Elizabeth Landau
Jet Propulsion Laboratory, Pasadena, Calif.
October 21, 2016
This artist’s concept depicts ”heartbeat stars,” which have been detected by NASA’s Kepler Space Telescope and others. Image credit: NASA/JPL-Caltech
Matters of the heart can be puzzling and mysterious – so too with unusual astronomical objects called heartbeat stars.
Heartbeat stars, discovered in large numbers by NASA’s Kepler space telescope, are binary stars (systems of two stars orbiting each other) that got their name because if you were to map out their brightness over time, the result would look like an electrocardiogram, a graph of the electrical activity of the heart. Scientists are interested in them because they are binary systems in elongated elliptical orbits. This makes them natural laboratories for studying the gravitational effects of stars on each other.
In a heartbeat star system, the distance between the two stars varies drastically as they orbit each other. Heartbeat stars can get as close as a few stellar radii to each other, and as far as 10 times that distance during the course of one orbit.
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PHOTO: Messier 82, seen in radio frequencies by the Karl G. Jansky Very Large Array. (Credit: Josh Marvil (NM Tech/NRAO), Bill Saxton (NRAO/AUI/NSF), NASA)
Using news releases from the National Radio Astronomy Observatory, Science Daily (www.sciencedaily.com) staffers at the NRAO came up with a list of the top 10 stories of 2014 using both the story’s scientific impact and public interest.
NRAO Chief Scientist Chris Carilli said of the list, “These ‘top ten’ are just a small sampling of the myriad ways in which the state-of-the-art NRAO facilities are enabling forefront research by the astronomical community.”
Carilli also said of 2014 list that U.S. and International astronomers, using new telescopes, instruments and techniques, worked on addressing the issues on the formation of planets, stars and galaxies, the fundamentals of physics and cosmology, astrochemistry and biology; “While finding some real surprises along the way!”