The Impact of Line Misidentification on Cosmological Constraints from Euclid and other Spectroscopic Galaxy Surveys

We perform forecasts for how baryon acoustic oscillation (BAO) scale and redshift-space distortion (RSD) measurements from future spectroscopic emission line galaxy (ELG) surveys such as Euclid are degraded in the presence of spectral line misidentification. Using analytic calculations verified with mock galaxy catalogs from log-normal simulations we find that constraints are degraded in two ways, even when the interloper power spectrum is modeled correctly in the likelihood. Firstly, there is a loss of signal-to-noise ratio for the power spectrum of the target galaxies, which propagates to all cosmological constraints and increases with contamination fraction, $f_c$. Secondly, degeneracies can open up between $f_c$ and cosmological parameters. In our calculations this typically increases BAO scale uncertainties at the 10-20% level when marginalizing over parameters determining the broadband power spectrum shape. External constraints on $f_c$, or parameters determining the shape of the power spectrum, for example from cosmic microwave background (CMB) measurements, can remove this effect. There is a near-perfect degeneracy between $f_c$ and the power spectrum amplitude for low $f_c$ values, where $f_c$ is not well determined from the contaminated sample alone. This has the potential to strongly degrade RSD constraints. The degeneracy can be broken with an external constraint on $f_c$, for example from cross-correlation with a separate galaxy sample containing the misidentified line, or deeper sub-surveys.Comment: 18 pages, 7 figures, updated to match version accepted by ApJ (extra paragraph added at the end of Section 4.3, minor text edits

Redefining the Agency of Jewish Communities Through Ghetto Humor

While the Holocaust is remembered by historians and victims as a time of suffering and genocide, Jewish ghetto survivors recall numerous occasions in which humor was used to combat the oppression of Nazi authorities. Although many historians emphasized the physical hardships and tragic conditions faced by Jewish victims of the Holocaust, the existence of jokes throughout Eastern European ghettos articulated the legitimacy of humor within the greater context and discussion of coping, resistance, and unification for the preservation of Jewish life and identity in the post-war period. Rather than depicting Jews as solely victims, humor returns agency to the Jews who lived in ghettos by highlighting the complexity of their reality without overgeneralizing their experiences

Australia and A Wire Through the Heart

Throughout a period of exploration in the colony of Australia, the development of the Overland Telegraph, as discovered by Charles Todd, increased Australian interaction on a global scale. Although the documentary A Wire Through the Heart does not depict all of the complex struggles English colonizers faced when settling Australia, the film accurately reflects the technological advancements, the significance of explorers, and environmental difficulties many colonizers encountered in Australia throughout the early 1800s. Alongside the increase in communication with the rest of the world, the Overland Telegraph assisted in the development of a unique, Australian culture separate from its original intent as a mercantilist colony

Contractual Wills: Misplaced Marital Loyalties: Eunsuing Litigation: Increased Federal Estate Taxes

A MYSTIFYING PLETHORA OF RECENT CASES indicates that husbands and and wives seem to be placing much more euphoric confidence in the judicial enforcement of their contractual wills than they do in unbargained-for assurances by the spouse that the provisions of such will never be changed. Many cases indicate that married couples feel that while mutual trust and confidence may be a revered tradition resulting from matrimonial bliss, they prefer to superimpose upon testamentary dispositions of their estates the common law concept of contract as an agreement which the courts will enforce. The repeated pattern of the various cases is that the respective spouses agree that their property shall be disposed of in accordance with their contractually executed wills; the first spouse to die does so with perhaps the ingenuous belief that contract obligation will somehow compel devotion to the spousal agreement which trust and loyalty apparently would not. It is made manifest by the case law that when the surviving spouse changes the provisions of the will upon which there was superimposed the contractual arrangement, the beneficiaries under the contractual will be granted enforcement remedies by the courts, under the theory that the changing of the contractual will was a material breach of the contract. The typical remedy afforded by the courts is the equitable remedy of the constructive trust

Epidemiology in Higher Education: Scarlet Fever at Gettysburg College

Throughout the early 20th century, the relationship between higher education and the spread of epidemic disease evolved in the United States. Two notable epidemics of scarlet fever in 1915 and 1920 serve as a lens through which the larger roles of disease and higher education can be analyzed. By assessing the roles both the administration and the students played at Gettysburg College, then Pennsylvania College, historians can understand the process of combating health crises in the future. Although the Pennsylvania College scarlet fever epidemics of 1915 and 1920 impacted campus to a smaller extent than the 2020 COVID-19 pandemic, the documentation from the students and faculty demonstrate the development of a complex understanding of the roles of educational authority in response to health crises