Tag Archive for Redfield

Wesleyan in the News

In this recurring feature in The Wesleyan Connection, we highlight some of the latest news stories about Wesleyan and our alumni.

Recent Wesleyan News

1. Los Angeles Times“As the World Warms, Deadly and Disfiguring Tropical Diseases Are Inching Their Way Toward the U.S.”

In this op-ed, Professor of Biology Frederick Cohan and Isaac Klimasmith ’20, both in the College of the Environment, write that infectious disease is a growing threat, resulting from climate change, that humans may find hard to ignore. Cohan is also professor, environmental studies and professor, integrative sciences.

2. Hartford Courant: “Trump’s Immoral Response to Climate Report”

Gary Yohe, the Huffington Foundation Professor of Economics and Environmental Studies, writes in this op-ed that it is “irresponsible” and “immoral” to ignore the findings of a major new report on climate change. Delaying action to mitigate and adapt to climate change will be increasingly damaging and expensive, he writes. Yohe is also professor of economics and professor, environmental studies, and was a reviewer on the new National Climate Assessment. He also recently co-authored an op-ed in HuffPost titled “People Are Already Dying by the Thousands Because We Ignored Earlier Climate Change Warnings.” 

3. National Geographic: “Both of NASA’s Voyager Spacecraft Are Now Interstellar. Where to Next?”

With both of NASA’s twin Voyager spacecraft now having crossed the threshold into interstellar space, Seth Redfield, associate professor and chair of astronomy, comments on what the spacecraft are likely to encounter on their journey. Redfield is also associate professor, integrative sciences, and co-coordinator of Planetary Science.

4. Inside Higher Ed: “Ordinary Education in Extraordinary Times”

President Michael Roth writes in this op-ed that in uncommon times, “traditional educational practices of valuing learning from people different from ourselves have never been more important.”

Recent Alumni News

  1. The Takeaway; WNYC Studios: “Politics with Amy Walter: Pentagon’s First-Ever Audit Exposes Massive Accounting Fraud”

David Lindorff ’71, the investigative journalist who wrote an exclusive on the topic for The Nation, joins Walter’s guests—including Staff Sergeant Patricia King, Ambassador Eric Edelman, and Dr. Isaiah Wilson III, a retired Army colonel and senior lecturer with Yale University’s Jackson Institute for Global Affairs—to discuss military spending and its alignment with the military’s strategic goals.

Redfield Speaks at California Academy of Sciences

Seth Redfield

Seth Redfield

On Oct. 15, Seth Redfield, associate professor and chair of astronomy, gave a lecture at the Morrison Planetarium at the California Academy of Sciences. He was invited to speak as part of the Benjamin Dean Astronomy Lecture series. The title of his talk was, “Exploring Our Galactic Neighborhood.” The talk will be posted to the Academy’s iTunes University site.

Redfield is also associate professor, integrative sciences, and co-coordinator, planetary science.

 

Wesleyan-Led Astronomy Consortium Joins Association of Universities for Research in Astronomy

The Association of Universities for Research in Astronomy (AURA), which operates the Hubble Space Telescope, the James Webb Space Telescope, the U.S. National Optical Astronomy Observatory (NOAO), and other major astronomical research facilities in the United States, has elected the Keck Northeast Astronomy Consortium (KNAC)—led by Wesleyan University—as a new member. This historic development represents the first time that liberal arts institutions have been invited to join the association and serves as an important recognition of the value of such programs, not just to education, but also to frontier research in astronomy.

Seth Redfield, campus director of the NASA CT Space Grant Consortium, reports that several students and faculty have recently been awarded grants for their research in astronomy. Photo c/o Redfield

Seth Redfield

“This is a tremendous recognition of the important impact that the Keck Consortium and our individual institutions have on the astronomy research landscape, and it literally gives us a seat at the table in terms of influencing the future of astronomy in the United States,” says Seth Redfield, associate professor and chair of astronomy at Wesleyan. “This is a validation of our impact in research and preparing future generations of astronomers (many of whom go on to PhD programs or postdocs or faculty positions at the large research institutions already on the board of AURA),” Redfield adds. “We are thrilled to have a voice from smaller institutions in shaping the future of our field.”

Observational Cosmologist Delivers Sturm Lecture

On April 3, Daniel Eisenstein, a observational cosmologist and a professor at Harvard University, spoke on "Mapping the Universe with the Sloan Digital Sky Survey" during the annual Sturm Memorial Lecture. In memory of Kenneth E. Sturm from the Class of 1940, this annual event is open the entire Wesleyan community and features a presentation from an astronomer that is outstanding in his/her field and is able to communicate the excitement of science to a lay audience.

On April 3, Daniel Eisenstein, a observational cosmologist and a professor at Harvard University, spoke on “Mapping the Universe with the Sloan Digital Sky Survey” during the annual Sturm Memorial Lecture. In memory of Kenneth E. Sturm from the Class of 1940, this annual event is open the entire Wesleyan community and features a presentation from an astronomer that is outstanding in his/her field and is able to communicate the excitement of science to a lay audience.

Research by Redfield, Zachary ’17 Using Hubble, Voyager Probes Widely Reported

Astronomy student Julia Zachary '17 presented research at a press conference at the American Astronomical Society's 229th annual meeting on Jan. 6. (Photo by © CorporateEventImages/Todd Buchanan 2017)

Astronomy student Julia Zachary ’17 presented research at a press conference at the American Astronomical Society’s 229th annual meeting on Jan. 6. (Photo by © CorporateEventImages/Todd Buchanan)

Wesleyan Associate Professor of Astronomy Seth Redfield and astronomy student Julia Zachary ’17 recently reported at the 229th meeting of the American Astronomical Society on their research using data from the Hubble Space Telescope combined with two Voyager spacecraft probes, both very long-lived and successful NASA missions. The findings were shared in dozens of news outlets from the U.S. to India to Afghanistan.

According to Nature.com, “The work is a rare marriage of two of the most famous space missions — and an unprecedented glimpse at the realm between the stars.”

“If the Voyager spacecraft and the Google Street View car are going around your neighborhood taking pictures on the street, then Hubble is providing the overview, the road map for the Voyagers on their trip through interstellar space,” Zachary said at a press conference held Jan. 6.

Astronomers have used instruments such as Hubble to obtain indirect measurements of the material in interstellar space. But the Voyager probes are giving them a direct taste of this mysterious environment, sending back data on the electron density of their surroundings. “As an astronomer, I’m not used to having measurements from the place I’m observing,” Redfield said.

SpaceDaily.com reports: “A preliminary analysis of the Hubble observations reveals a rich, complex interstellar ecology, containing multiple clouds of hydrogen laced with other elements. Hubble data, combined with the Voyagers, have also provided new insights into how our sun travels through interstellar space.”

“This is a great opportunity to compare data from in situ measurements of the space environment by the Voyager spacecraft and telescopic measurements by Hubble,” said study leader Seth Redfield of Wesleyan University in Middletown, Connecticut.

“The Voyagers are sampling tiny regions as they plow through space at roughly 38,000 miles per hour. But we have no idea if these small areas are typical or rare. The Hubble observations give us a broader view because the telescope is looking along a longer and wider path. So Hubble gives context to what each Voyager is passing through.”

Read more at Astronomy.comThe Indian ExpressEarthSky.org and International Business Times. See photos of Zachary at the press conference on the American Astronomical Society’s website. A press release can be found on HubbleSite.

Redfield also is associate professor of integrative sciences.

Four Students Awarded NASA Connecticut Space Grants

Grant recipient Rami Hamati '19, left, at a workshop sponsored last summer by the CT Space Grant on helicopters and other small aircraft.

Grant recipient Rami Hamati ’19, left, is pictured at a workshop sponsored last summer by the Connecticut Space Grant on helicopters and other small aircraft.

Four Wesleyan undergraduate students have received grants from NASA’s Connecticut Space Grant Consortium.

Astronomy major Hannah Fritze ’18 was awarded $5,000 for an Undergraduate Research Fellowship Grant titled, “Searching for Intermediate Mass Black Holes in Ultraluminous X-ray Binaries.” This grant will support her research this coming semester on black holes with Roy Kilgard, support astronomer and research associate professor of astronomy.

Avi Stein ’17, who is majoring in astronomy, was awarded $1,000 for a Student Travel Grant. He will be presenting his research on Venus—conducted with Martha Gilmore, the George I. Seney Professor of Geology, professor of earth and environmental sciences—at the 48th Lunar and Planetary Science Conference (LPSC) in March.

Rami Hamati ’19 and David Machado ’18 each received a $5,000 undergraduate scholarship. According to Seth Redfield, associate professor of astronomy, associate professor of integrative sciences, these scholarships are awarded to students who show promise as a major in a STEM field related to NASA’s mission.

Read about past recipients of Connecticut Space Grants here and here.

Redfield Speaks to Wesleyan Staff about Discovering Exoplanets

eve_astro_2016-1031005342

On Oct. 31, Seth Redfield, associate professor of astronomy, spoke on “Blue Skies on Distant Worlds” during a special luncheon for staff in Daniel Family Commons. Redfield, whose research interests focus on exoplanets and their atmospheres, explained how astronomers can detect and measure planets outside of our solar system. In the same way Earth orbits around the sun, an exoplanet will circle around a star. For some planetary systems, from Earth, astronomers can view the the exoplanet passing directly in front of its host star once per orbit.

Van Vleck Observatory Celebrates Centennial with Exhibition, Event Series

Wesleyan’s iconic observatory dome was built to house the Van Vleck Refractor, used in research until the early 1990s. Photo by John Van Vlack.

Wesleyan’s iconic observatory dome was built to house the Van Vleck Refractor, used in research until the early 1990s. (Photo by John Van Vlack)

The building was named for Professor John Monroe Van Vleck, who taught mathematics and astronomy at Wesleyan from 1853 until his death in 1912.

The building was named for Professor John Monroe Van Vleck, who taught mathematics and astronomy at Wesleyan from 1853 until his death in 1912.

Wesleyan’s Van Vleck Observatory is celebrating its centennial this spring, with a series of events and an exhibition beginning in early May.

On May 6, the observatory’s library will reopen to the public with an exhibition on the history of astronomy at Van Vleck. Developed by a team of faculty, students, and staff, the exhibition will use the observatory’s extensive collection of scientific instruments, teaching materials, photographs, drawings, and correspondence to illustrate both the changes in astronomical research and teaching over the past century, and the observatory’s consistent mission of conducting instruction and research under the same roof. The exhibition will incorporate the history of science into Van Vleck’s existing public outreach programs through period lectures, demonstrations of historic artifacts, and gallery talks.

“The Millionaire” Mechanical Calculator. Useful for determining distances to stars, this late 19th-century calculator had high precision (eight significant figures) and is still in perfect working order. (Photo by John Van Vlack)

“The Millionaire” Mechanical Calculator. Useful for determining distances to stars, this late 19th century calculator had high precision (eight significant figures) and is still in perfect working order. (Photo by John Van Vlack)

The exhibition was spearheaded by Roy Kilgard, support astronomer and research associate professor of astronomy, Seth Redfield, associate professor of astronomy, associate professor of integrative sciences, Amrys Williams, visiting assistant professor of history, and Paul Erickson, associate professor of history, associate professor of environmental studies, associate professor of science in society.

More events are planned in the run-up to the exhibition opening. On May 1, the Wesleyan Orchestra will hold a concert featuring astronomically themed music, including John Cage’s Atlas Eclipticalis, which was composed using star charts from the Van Vleck Observatory library. On May 3, Special Collections & Archives will host an exhibition, “A Stellar Education: Astronomy at Wesleyan, 1831-1916.” Located on the first floor of Olin Library, the exhibition documents the study of astronomy at Wesleyan from the university’s opening through the construction of the Van Vleck Observatory. On May 4, the History Department is hosting David DeVorkin, senior curator at the National Air and Space Museum, who will give a talk situating Van Vleck in the history of American observatories.

Faculty, Students Win Research Support from NASA’s CT Space Grant Consortium

The Van Vleck Observatory on Foss Hill.

The Van Vleck Observatory on Foss Hill.

Two faculty members and three students have been awarded grants in the latest call for proposals from NASA’s Connecticut Space Grant Consortium.

Jim Greenwood, assistant professor of earth and environmental sciences, and Bill Herbst, the John Monroe Van Vleck Professor of Astronomy, professor of integrative sciences, were awarded $8,000 for a Faculty Collaboration Grant titled “Chondrule Formation Experiments.” This is to run high-temperature experiments on material that makes up meteorites in order to test a hypothesis that they put forward in a recent paper in Icarus this year.

Seth Redfield, associate professor of astronomy, associate professor of integrative sciences, was awarded $1,500 for a STEM Education Programming Grant

Study by Redfield, Johnson ’11 Published in Astrophysical Journal, New Scientist

Seth Redfield, associate professor of astronomy, and Marshall Johnson ’11 are the co-authors of an article titled “The Interstellar Medium in the Kepler Search Volume,” published in The Astrophysical Journal, Vol. 802, No. 2, July 2015. The article highlights ways scientists are studying the gas and dust in the galaxy near where the Kepler Space Telescope is discovering exoplanets.

“Stars, with planets, can interact with the gas surrounding them in interesting ways, like bubbles in a drink, where each of the bubbles is an individual star (perhaps with planets) and the drink is the ‘interstellar medium’, the gas in between the stars,” Redfield explained.

In addition, The New Scientist published an article on Aug. 6 titled, “Distant worlds could be sheltering in a bubble around their star,” which focuses on the authors’ Astrophysical Journal study. It reads:

Distant planets may be swaddled in a protective bubble of magnetism and charged particles, courtesy of their parent star. The first study to scrutinize these so-called astrospheres shows that some exoplanets are more well shielded than Earth, others not so lucky – and that their protection can be fickle.

Within our solar system, the sun’s wind of charged particles and radiation forms a bubble called the heliosphere, which repels cosmic rays that can affect Earth’s weather, eat away at the ozone layer and damage DNA. Likewise, astrospheres guard faraway worlds from the ravages of the cosmos, says Marshall C. Johnson, an astronomer at the University of Texas in Austin.

An astrosphere’s size is determined partly by the strength of the star’s winds, and partly by the surrounding interstellar medium of gas and dust. The star’s velocity through the galaxy also has an effect.

“It’s just like if you are driving and you stick your hand out the window. You will experience higher pressure on your hand when you are driving fast than when you are driving slowly,” Johnson says. “If there is a greater relative velocity between the star and the interstellar medium, there will be a greater pressure exerted on the astrosphere.”

Johnson is working on his PhD in astronomy at the University of Texas in Austin. Marshall and Redfield had gone together in 2010-11 to observe at the McDonald Observatory in west Texas, and this project grew out of this work.

Another co-author on the paper, Adam Jensen, was a postdoctoral researcher at Wesleyan between 2010-2013 and was funded by the National Science Foundation.

Bow Shock Study by Redfield, Cauley Published in Astrophysical Journal

Seth Redfield, associate professor of astronomy, and Wilson Cauley, postdoctoral researcher in astronomy, led the effort on a paper titled “Optical hydrogen absorption consistent with a thin bow shock leading the hot Jupiter HD 189733b” accepted for publication in The Astrophysical Journal.

Wilson Cauley, postdoctoral researcher in astronomy, created a animation that shows the transit of bow shock material as it crosses a stellar disk, and the absorption values the model predicts. Cauley's study demonstrates an exciting path forward in attempting to measure exoplanet magnetic fields. 

Wilson Cauley, postdoctoral researcher in astronomy, created a animation that shows the transit of bow shock material as it crosses a stellar disk, and the absorption values the model predicts. Cauley’s study demonstrates an exciting path forward in attempting to measure exoplanet magnetic fields.

Bow shocks are ubiquitous astrophysical phenomena resulting from the supersonic passage of an object through a gas. In this paper, the authors present a robust detection of a time-resolved pre-transit, as well as in-transit, absorption signature around the hot Jupiter exoplanet HD 189733b using high spectral resolution observations of several hydrogen lines.

Better knowledge of exoplanet magnetic field strengths is crucial to understanding the role these fields play in planetary evolution and the potential development of life on planets in the habitable zone.

Cauley’s research is funded at Wesleyan through the National Science Foundation to study the extended atmospheres of exoplanets. For more information and to view a animation that summarizes the paper’s results, visit Cauley’s website.

In addition, Redfield and Cauley will present results from an observation made at the largest telescopes in the world, the Keck Telescope in Hawaii, during the International Astronomical Union General Assembly in August.

 

7 Faculty Promoted, Awarded Tenure

In its most recent meeting, the Board of Trustees promoted seven faculty members.

The BOT conferred tenure on Lauren Caldwell, associate professor of classical studies; Stephen Collins, associate professor of film studies; Paul Erickson, associate professor of history; Matthew Garrett, associate professor of English; Brian Northrop, associate professor of chemistry; Julia Randall, associate professor of art; and Seth Redfield, associate professor of astronomy.

The promotions are effective July 1, 2015.

Brief descriptions of their areas of research and teaching appear below.

Lauren Caldwell
Caldwell’s research focuses on Roman social history, Roman law, and Greco-Roman medicine. Her recent book, Roman Girlhood and the Fashioning of Femininity (Cambridge University Press, 2014) investigates the social pressures