New Maser Emission from Nonmetastable Ammonia in NGC 7538. II. Green Bank Telescope Observations Including Water Masers

We present new maser emission from ^{14}NH_3 (9,6) in NGC 7538. Our observations include the known spectral features near v_LSR = -60 km/s and -57 km/s and several more features extending to -46 km/s. In three epochs of observation spanning two months we do not detect any variability in the ammonia masers, in contrast to the >10-fold variability observed in other ^{14}NH_3 (9,6) masers in the Galaxy over comparable timescales. We also present observations of water masers in all three epochs for which emission is observed over the velocity range -105 km/s < v_LSR < -4 km/s, including the highest velocity water emission yet observed from NGC 7538. Of the remarkable number of maser species in IRS 1, H_2O and, now, ^{14}NH_3 are the only masers known to exhibit emission outside of the velocity range -62 km/s < v_LSR < -51 km/s. However, we find no significant intensity or velocity correlations between the water emission and ammonia emission. We also present a non-detection in the most sensitive search to date toward any source for emission from the CC^{32}S and CC^{34}S molecules, indicating an age greater than \approx 10^4 yr for IRS 1-3. We discuss these findings in the context of embedded stellar cores and recent models of the region.Comment: 7 pages, 4 figures, 3 tables; accepted to AJ; color figures only on arxiv; revised to include references and minor proof change

Filming children of Agent Orange rehabilitation villages in Vietnam and the danger of misrepresentation

Thesis: S.B., Massachusetts Institute of Technology, Department of Architecture, 2015.Cataloged from PDF version of thesis.Includes bibliographical references (pages 43-44).We represent the Vietnam War as a concluded event in the past; however, the Agent- Orange-affected population in Vietnam shows that war is contemporary. This population remains relatively unknown to the world - especially to the Western world. We are isolated from the Agent-Orange-affected population because we have grown dependent on curated images of the Vietnam War in popular media that do not include the local population. Here, a challenging duty of a filmmaker is to create new images that convey their experience. This thesis will examine the filmmaking process of the contemporary population affected by Agent Orange in Vietnam and raise larger questions about the ways in which we capture contemporary war victims' stories through video. How can film revive engagements with a seemingly concluded war? How do we tell stories of people with visually apparent abnormalities without ostracizing them?by Stella Seojin Kim.S.B