Dr. Kelsey Johnson, Astronomer

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Associate Professor, Astronomy
College & Graduate School of Arts & Sciences
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WHAT DOES A SCIENTIST LOOK LIKE?

The NASA/ESA Hubble Space Telescope has snapped the best ever image of the Antennae Galaxies. Hubble has released images of these stunning galaxies twice before, once using observations from its Wide Field and Planetary Camera 2 (WFPC2) in 1997, and again in 2006 from the Advanced Camera for Surveys (ACS). Each of Hubble’s images of the Antennae Galaxies has been better than the last, due to upgrades made during the famous servicing missions, the last of which took place in 2009. The galaxies — also known as NGC 4038 and NGC 4039 — are locked in a deadly embrace. Once normal, sedate spiral galaxies like the Milky Way, the pair have spent the past few hundred million years sparring with one another. This clash is so violent that stars have been ripped from their host galaxies to form a streaming arc between the two. In wide-field images of the pair the reason for their name becomes clear — far-flung stars and streamers of gas stretch out into space, creating long tidal tails reminiscent of antennae. This new image of the Antennae Galaxies shows obvious signs of chaos. Clouds of gas are seen in bright pink and red, surrounding the bright flashes of blue star-forming regions — some of which are partially obscured by dark patches of dust. The rate of star formation is so high that the Antennae Galaxies are said to be in a state of starburst, a period in which all of the gas within the galaxies is being used to form stars. This cannot last forever and neither can the separate galaxies; eventually the nuclei will coalesce, and the galaxies will begin their retirement together as one large elliptical galaxy. This image uses visible and near-infrared observations from Hubble’s Wide Field Camera 3 (WFC3), along with some of the previously-released observations from Hubble’s Advanced Camera for Surveys (ACS).In 2014, Dr. Johnson discovered the birth environment of stars—a globular cluster 50 million light years away; stars about to be born. This major scientific discovery received a large amount of press from the mainstream media. However, the mainstream media changed Dr. Johnson’s gender from “she” to “he”. Dr. Johnson’s experience vividly represents the gender bias and discrimination that permeates not only STEM fields but the general public’s understanding of who a scientist is and what they look like. Read her Editorial about being “an outsider” in science, That Lab Coat Looks Good on You. Visit Dr. Johnson’s lab, see the globular cluster, and learn more about her research on star formation.

ADVOCACY

Dr. Johnson is a strong advocate for girls’ STEM education and science literacy among school children. She runs the Dark Skies, Bright Kids astronomy club in local schools, and the UVA-Wise STEM-H program for girls.

Hear an interview with Dr. Johnson about the Dark Skies, Bright Kids program and get information about this astronomy club.

The STEM-H program lets girls imagine the scientists they can become and works to keep middle school girls interested in science at a time when research shows they drop out of science and math due to self-esteem and gender stereotyping.

LEARN MORE

Visit Dr. Johnson’s lab, see the globular cluster, and learn more about her research on star formation.


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