Olivia DrakeSeth Redfield, assistant professor of astronomy, and Katy Wyman MA '11, recently co-authored a paper that will appear in the Aug. 10 Astrophysical Journal, detailing several hundred spectral line measurements out to bright stars within 326 light years of our sun. Wyman is now employed at the Harvard-Smithsonian Center for Astrophysics. The study also appeared in the July 28 edition of Forbes in an article titled "Looking In The Sun's Rear-View Mirror: A New Map Of The Local Interstellar Medium." The first comprehensive map of the local interstellar medium — the gas drifting between the nearest stars — "will not only help theorists…
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Natalie Robichaud ’14Maya Gomes ’06 and her co-author Matthew Hurtgen published their paper, “Sulfur isotope systematics in a permanently euxinic, low-sulfate lake: Evaluating the importance of the reservoir effect in modern and ancient oceans,” in the June issue of the journal, Geology. In the paper, the authors present data that shows how geologists can use sulfur isotope compositions of marine sediments to discover variations in oceanic sulfate levels through Earth history. Gomes explained that the paper is very important to researchers who study the climate of the past because “marine sulfate levels play a role in regulating oxygen and carbon dioxide levels…
(Contributed by Jim Smith) Meredith Hughes was one of those kids drawn to science and nature. But growing up in small-town Rhode Island, she didn’t know any scientists. “The people I knew who liked science were teachers and doctors,” recalled Hughes, a new assistant professor of astronomy at Wesleyan this year. “So I figured that’s probably what I’d be.” Then, during her junior year of high school, a patient of her mother, a women’s health nurse practitioner, recommended a program for budding scientists called The Summer Science Program (SSP). Hughes applied, and became one of 25 students from around the…
Seth Redfield, assistant professor of astronomy, spoke on "Properties of the Interstellar Medium Surrounding the Sun and Nearby Stars" during a conference held March 11-15 in the Physikzentrum in Bad Honnef, Germany. The conference, which was 527th in a series, was sponsored by the Wilhelm und Else Heraeus Stiftung, a German foundation that supports scientific research and education. The topic of the conference was "Plasma and Radiation Environment in Astrospheres and Implications for the Habitability of Extrasolar Planets."
By looking at high-resolution images captured by the Mars Reconnaissance Orbiter, scientists are able to see gullies, which are argued to be geologically recent. Because they are most likely formed by water, it is believed that they can answer the question of whether or not there is still "active" water on Mars. As a summer Wesleyan McNair scholar, astronomy major Lavontria Aaron '14 used a hyperspectral instrument to determine if the gullies contained minerals (salts) which would be left behind by water brines. "By examining the spectrum of the brines, we'll be able to learn more about Mars' history and…
David PesciIn a nearby solar system, a planet the size of Jupiter orbiting a star similar to our own sun is doing something that has astrophysicists very intrigued: It’s dissolving--albeit very, very slowly. The findings are detailed in a study by primary investigators Adam Jensen, visiting assistant professor of astronomy, and Seth Redfield, assistant professor of astronomy. They made the majority of their observations using the 9.2 meter telescope at The University of Texas’s McDonald Observatory. The paper, “A Detection of Ha In An Exoplanetary Exosphere,” will appear in the June 1 issue of The Astrophysical Journal. The planet in question,…
In the summer of 2010 Craig Malamut traveled to the Easter Islands to study and photograph a rare solar eclipse. Soon after his eclipse observations were completed, NASA used one of his photographs in their official materials on the event. He also spent a week collaborating with astronomers from the University of Chile in Santiago to study Pluto’s atmosphere as it obscured the light from a faint star. This year, Malamut has coauthored two papers for astronomical journals and is analyzing data from the Hubble Space Telescope on gas and dust clouds lying near the sun and other nearby stars.…
James Greenwood, research associate professor of earth and environmental sciences, received a grant worth $494,517 from NASA. The grant will support his research titled “Water in Lunar Rocks: Petrologic and Isotopic Analyses of Phosphate Minerals in Apollo’s Samples” through June 30, 2014.
James Greenwood, visiting assistant professor of earth and environmental sciences, was mentioned in a June 14 BBC News science article on “Much More Water Found in Lunar Rocks.” Greenwood and Professor Lawrence Taylor from the University of Tennessee in Knoxville, have come up with evidence on the origins of lunar water: comets. According to the article, they believe there were a lot of comets flying around at the time of the Moon's formation, "hitting the little, nascent, early Moon some 4.5 billion years ago.”
Jim Greenwood, research assistant professor of earth and environmental sciences, holds a slide with a moon rock sample that contains water. The water was found in the mineral apatite, which he and his team were able to identify in the sample. (Photo by Olivia Bartlett Drake)Soon after the Apollo spaceflights to the moon, experts examined the rocks brought back by the astronauts and declared with certainty that the moon was a dry, waterless place. Forty years later, James Greenwood begs to differ. Not only does he have proof, his findings strongly suggest that some of the lunar water he found…