Hannah Bloom

Bio:

M.S. in Geophysical Sciences from University of Chicago, 2022

B.A. in Geochemistry from Washington University in St. Louis, 2020

Hannah earned her Master's degree at UChicago, where her research plans focused on isotopic analyses of presolar SiC grains and meteoritic inclusions using resonance ionization mass spectrometry (RIMS) with CHILI. By studying the isotopic composition and morphology of these samples, she hopes to better understand their formation histories as they pertain to stellar nucleosynthesis and Galactic chemical evolution.

Hannah is now pursuing a career in teaching with positions local colleges.

(Source: Homepage)

Research Interests:

Cosmochemistry

As a graduate student in the geophysical sciences, Hannah's research has an emphasis in cosmochemistry. Using resonance ionization mass spectrometry (RIMS) with CHILI, she plans to measure the isotopic composition of various elements in presolar silicon carbide (SiC). Presolar grains originate from the outbursts and ejecta of stars late in their evolution, such as asymptotic branch (AGB) stars, supernovae (SNe), as well as novae. These grains can be found in samples returned to Earth by spacecraft or by nature, like primitive meteorites, interplanetary dust particles (IDPs), and cometary dust returned by NASA's Stardust mission. Different classes of grains represent different classes of stars, each of which contains the nucleosynthetic history of a particular through its isotopic record having survived the hazardous interstellar medium and solar nebular environments. She is also interested in analyzing hibonite, an oxide mineral commonly found in the "CAIs" (Ca-, Al-rich inclusions) prevalent in some chondritic meteorites, which is known to preserve the largest nucleosynthetic anomalies of all materials presumed to have formed within the Solar System that have circumvented nebular processes that would have otherwise erased any isotopic heterogeneity. By studying these hib-rich inclusions we have the potential to determine crucial constraints that could very well answer questions regarding what stellar sources contributed nucleosynthetic components to the solar nebula, whether all components were present when the solar nebula first formed, what the relationship between nucleosynthetic anomalies prior to onset of nebular homogenization processes was like, and whether nebular processes affected different nucleosynthetic components in different ways.

(Source: Homepage)

Recent Publications:

• Stephan T., Bloom H. E., Hoppe P., Davis A. M., Korsmeyer J. M., Regula A., Heck P. R., and Amari S. (2022) Molybdenum, ruthenium, and barium in presolar silicon carbide and graphite: s-, r-, and p-processes and the role of contamination (abstract). Meteorit. Planet. Sci. 57. [pdf]

• Regula A., Bloom H. E., Dauphas N., Davis A. M., Korsmeyer J. M., Krawczynski M. J., and Stephan T. (2022) Trace element ratios with CHILI: A progress report (abstract). Lunar Planet. Sci. 53, #2877. [pdf]

• Korsmeyer J. M., Stephan T., Davis A. M., Bloom H. E., MacPherson G. J., and Ivanova M. A. (2022) Molybdenum and ruthenium isotopic composition of a metal grain in a calcium–aluminum-rich inclusion from the Efremovka CV3 chondrite (abstract). Lunar Planet. Sci. 53, #2795. [pdf]

• Bloom H. E., Stephan T., Davis A. M., Heck P. R., Hoppe P., Korsmeyer J. M., and Amari S. (2022) s-Process molybdenum, ruthenium, and barium in high-density presolar graphite (abstract). Lunar Planet. Sci. 53, #2624. [pdf]

• Regula A., Bloom H. E., Dauphas N., Davis A. M., Korsmeyer J. M., Krawczynski M. J., Pellin M. J., Sheu S., and Stephan T. (2021) Toward trace element concentrations with CHILI (abstract). Meteorit. Planet. Sci. 56, A227 (#6287). [pdf]

• Stephan T., Bloom H. E., Davis A. M., Hoppe P., Korsmeyer J. M., Pellin M. J., Regula A., and Sheu S. (2021) Correlated molybdenum and ruthenium isotopes in presolar silicon carbide (abstract). Meteorit. Planet. Sci. 56, A252 (#6270). [pdf]

• Zhen Tian, Tomas Magna, James M.D. Day, Klaus Mezger, Erik E. Scherer, Katharina Lodders, Remco C. Hin, Piers Koefoed, Hannah Bloom, and Kun Wang (2021) Potassium isotope composition of Mars reveals a mechanism of planetary volatile retention. Proceedings of the National Academy of Sciences of the United States of America. (In Review May 2021)

• Bloom H. E., Chen H., Fegley B., Lodders K., and Wang K (2020) Potassium Isotope Compositions of Carbonaceous and Ordinary Chondrites: Implications on the Origin of Volatile Depletion in the Early Solar System. Geochimica et Cosmochimica Acta. [html]

• Zhao C., Bloom H. E., Chen H., Tian Z., Koefoed P., Lodders K., Wang K (2019) Potassium Isotopic Compositions of Enstatite Meteorites. Meteoritics & Planetary Science. [html]