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FAR Seminar Archive


Education & Outreach

At a Glance  08.25.2008

In the summer of 2008, the Goddard Center for Astrobiology hosted the fifth group of students for the Summer Undergraduate Internship in Astrobiology (SUIA). As in the past, students were paired with mentors based on their research interests and spent a large majority of their time actually doing research. During the 10 week period, students toured several labs. The summer also included a visit to National Radio Observatory located in Greenbank, West Virginia to use their 40Ft Telescope for an observing run.


The 2008 SUIA Students - Pictured left to right: Lily Raines (Eckerd College), Nadya Raveda (Connecticut College), Lorne Loudin (Keene State College), Kamen Todorov (Connecticut College), Ariel Lewis (Eckerd College), Charlotte Carlstrom (Emory University)

_ The SUIA Students on a tour at the University of Maryland.
_ Charlotte and Kamen trying on Astronaut gloves during our tour of Goddard Space Flight Center.
_ Students at the National Radio Astronomy Observatory. In the background is the Greenbank Telescope.

Lorne Loudin's Presentation

Lorne Loudin (Keene State College) worked with GCA Co-Investigator Dr. Richard Walker (University of Maryland) for a second summer. He investigated isotopic anomalies in lunar samples returned by Apollo: Highly Siderophile Elements and Osmium Isotope Systematics in the Lunar Impact Melt 76055. This work led to identification of surviving isotopic signatures of the impactor that created the Serentitatis Basin and also the relict signature of a pre-Serenitatis impactor. Lorne will begin Graduate Studies in Geosciences with Dr. Walker, in January 2009 at the University of Maryland.


Kamen Todorov's Presentation

Kamen Todorov (Connecticut College) was mentored by GCA Co-Investigator Dr. Drake Deming (GSFC). Kamen's presentation was on the Atmosphere of Exoplanet HAT-P-1b from Spitzer Space Telescope Observations. HAT-P-1b is a transiting gas giant planet orbiting extremely close to its parent star. It is a typical representative of the class of 'hot Jupiters'. Kamen analyzed data from the secondary eclipse of HAT-P-1b in four different wavelengths. He detected the flux from the planet and compared it with existing models of planetary atmospheres; the results are being prepared for publication. This was Kamen's second year as an intern and he will begin graduate studies at Penn State in the fall of 2008.


Nadya Radava's Presentation

Nadezhda Radeva (Connecticut College) is a second year intern and was mentored by GCA Collaborator Dr. Geronimo Villanueva (GSFC). Nadya analyzed high resolution infrared spectra of Mars acquired at the W. M. Keck Observatory (Mauna Kea, HI), emphasizing bands of CO2, H2O, HDO, and O2 revealed in a spectrally complete survey of the 1.1-1.4, 2.9-3.7, and 4.6-5.0 spectral regions. Working with these highly advanced spectra, she studied and removed instrumental effects (e.g., hot and dead pixels, spectral-fringes, spectral tilt, and baseline offsets) and provided calibrated spectra across the disk of Mars. She extracted line intensities for water (H2O) and O2 point-by-point along the central meridian of Mars, showing that the two species are anti-correlated on the planet. The O2 emission is a tracer for ozone so her results provide a direct measure of these photo-chemically linked atmospheric species on Mars.


Charlotte Carlstrom's Presentation

Charlotte Carlstrom (Emory College) was mentored by GCA Collaborator Dr. Jen Eigenbrode (GSFC). Using standards and samples, Charlotte learned the fundamentals of gas chromatography mass spectrometry (GCMS) analysis of organic compounds common to Mars analog samples. First she prepared standard mixes of compounds common to terrestrial life (e.g. saturated, unsaturated, and hydroxy carboxylic acids, alphatic alcohols and ketones, amines, quinones, triglycerides, etc). These mixes are being used as a quantitative and qualitative reference for gas chromatography mass spectrometry (GCMS) analyses of Mars analog rocks and ice. Building upon Charlotte's biological background and astrobiology interests, she also investigated a variety of hydrocarbons in control samples (snow algae and cryoconite sediments) from the surface of an arctic glacier that is the target of more intensive studies of signatures of life in ice (funded by NASA Programs in Exobiology and Mars Fundamental Research, J. Eigenbrode, PI). She compared GCMS results of (1) solvent-extracts, as is common of geobiology laboratories, and (2) pyrolysis products, as would be expected of an instrument similar to the Science Analysis at Mars (GCMS) being prepared by P. Mahaffy and colleagues for the Mars Science Laboratory mission. Her results shed light on molecular inputs to ice from surface biology, aerosols and wind-blown detritus. The results will contribute to a growing knowledge base of biosignatures from GCMS analyses, and will help us differentiate sources for trace levels of organics detected surface glacial ice.


Lily Raines' Presentation

Lily Raines (Eckerd College) was mentored by GCA Co-Investigator Dr. Marla Moore (GSFC), on a project entitled Following the carbon: Structure, Chemistry and Spectroscopy of Frozen Ethane. Oort Cloud comets, as well as Pluto, Quasar, 2005 FY9, and other TNOs contain significant amounts of ethane. Even though this molecule is found in many places, there is very little information about its amorphous, metastable, and crystalline phases. Lily's experiments formed ethane ices at various temperatures, then heated and ion-irradiated them to investigate the resulting phase changes, the possible reversal of phase changes, and the radiation chemistry of ethane. These properties were studied using IR spectroscopy in the near-, mid-, and far-IR regions. Improved understanding of ethane ices and processing may contribute to future searches for related hydrocarbons in the outer solar system.


Ariel Lewis' Presentation

Ariel Lewis (Eckerd College) was a second year intern and she worked with GCA Co-Investigator Dr. Jason Dworkin (GSFC). In their search for amino acids in meteorites, Dr. Dworkin and collaborators had identified ubiquitous contamination of samples collected in Antarctia and stored in nylon bags. Ariel conducted a study of candidate collection bags for possible use in future Antarctic meteorite expeditions. Her work focused on finding a cleaner bag for meteorite collection and storage. Clean water samples were placed in bags made of three candidate materials and extracted twenty four hours later. These samples were then subjected to acid hydrolysis and analyzed for contaminants using LC-FD/ToF-MS. This quantitative analysis allowed direct comparison of the amino acid cleanliness of the various bags, and identified a better bag for meteorite collection. + Freedom of Information Act
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