Первоапрельская подбока в Архиве

Подозреваю, что еще и 2-го апреля будут выходить первоапрельские статьи (потому что 1-е апреля - понедельник).

https://arxiv.org/abs/2403.19891
Everything's Fine
Eve Armstrong
I investigate the peculiar situation in which I find myself healthy and strong, with a darling family, stimulating job, top-notch dental plan, and living far from active war and wildfire zones -- yet perpetually ill at ease and prone to sudden-onset exasperation when absolutely nothing has happened. My triggers include dinner parties, chairs, therapists, and shopping at Costco. In analysing this phenomenon, I consider epigenetics, the neuroscience of neuroticism, and possible environmental factors such as NSF grant budgets. Yet no obvious solution emerges. Fortunately, my affliction isn't really all that serious. In fact, it's good writing material. So while I'm open to better ideas, I figure I'll just continue being like this.

https://arxiv.org/abs/2403.19977
Is Winter Coming?
A. Winter, A. Winter, A. Winter, A. Winter
We critically examine the often-made observation that "quantum winter [or some other winter] is coming", and the related admonition to prepare for this or that winter, inevitably bound to arrive. What we find based on even the most superficial look at the available evidence is that such statements not only are overblown hype, but are also factually wrong: Winter is here, and the real question is rather for how long it/they will stay.

https://arxiv.org/abs/2403.20087
Unobserving the Moon: the spurious possibility of orbital decoupling due to solar neutrino Arago spot
Henrik Viitasaari, Oskari Färdig, Joona H. Siljander, A. Petrus Väisänen, Aapo S. Harju, Antti V. Nurminen, Jami J. Kinnunen
The Arago spot is an intensity maximum at the center of a shadow created by constructive interference of diffracted waves around a spherical object. While the study of diffraction patterns usually concerns visible light, de Broglie's wave nature of matter makes diffraction theory applicable for particles, such as neutrinos, as well. During a solar eclipse, some of the neutrinos emitted by the Sun are diffracted by the Moon, resulting in a diffraction pattern that can be observed on Earth. In this paper we consider the theoretically emerging solar neutrino Arago spot as a means to measure the location of the Moon with high accuracy and consider its implication on the orbit of the Moon given Heisenberg's uncertainty principle. Our results indicate that the Moon is not at immediate risk of orbital decoupling due to the observation of a solar neutrino Arago spot.

https://arxiv.org/abs/2403.20175
Species Syzygy: Which Animal Has Seen the Most Total Solar Eclipses?
Mark Popinchalk
A Total Solar Eclipse (TSE) is a shocking and sublime experience. In just a week hundreds of millions of Homo Sapiens will attempt to see the 2024 eclipse as it stretches across the North American continent. However, while Homo Sapiens may be uniquely positioned to understand and predict eclipses, they are not the only species capable of observing them. The precise alignment of the Moon, Earth and Sun all existed well before humans. In the same way we share this planet capable of hosting life, the fantastic astronomical experiences available on it are not exclusive either. We present a framework to calculate the number of Total Solar Eclipses experienced by a species at any point in Earth's history. This includes factoring in the evolution of the Sun-Moon-Earth system, the duration the species is extant, and average population. We normalize over the geographic range by calculating an Astronomical World Eclipse Surface cOverage MEtric (AWESOME) time. To illustrate this framework we look at the case study of the family Limulidae (Horseshoe Crabs) and estimate the number of individuals that have seen an eclipse. We compare it to the number of current Homo Sapiens that view eclipses, and predict if it is possible for another species to take the ''top'' spot before the final total solar eclipse in ~ 380 million years.

https://arxiv.org/abs/2403.20281
Vulcan: Retreading a Tired Hypothesis with the 2024 Total Solar Eclipse
Michael B. Lund
The number of planets in the solar system over the last three centuries has, perhaps surprisingly, been less of a fixed value than one would think it should be. In this paper, we look at the specific case of Vulcan, which was both a planet before Pluto was a planet and discarded from being a planet before Pluto was downgraded. We examine the historical context that led to its discovery in the 19th century, the decades of observations that were taken of it, and its eventual fall from glory. By applying a more modern understanding of astrophysics, we provide multiple mechanisms that may have changed the orbit of Vulcan sufficiently that it would have been outside the footprint of early 20th century searches for it. Finally, we discuss how the April 8, 2024 eclipse provides a renewed opportunity to rediscover this lost planet after more than a century of having been overlooked.

https://arxiv.org/abs/2403.20302
I'm in AGNi: A new standard for AGN pluralisation
Andrew D. Gow, Peter Clark, Dan Rycanowski
We present a new standard acronym for Active Galactic Nuclei, finally settling the argument of AGN vs. AGNs. Our new standard is not only etymologically superior (following the consensus set by SNe), but also boasts other linguistic opportunities, connecting strongly with relevant theology and streamlining descriptions of AGN properties.

https://arxiv.org/abs/2403.19937
Deeper Learning in Astronomy
Douglas Scott, Ali Frolop
It is well known that the best way to understand astronomical data is through machine learning, where a "black box" is set up, inside which a kind of artificial intelligence learns how to interpret the features in the data. We suggest that perhaps there may be some merit to a new approach in which humans are used instead of machines to understand the data. This may even apply to fields other than astronomy.

https://arxiv.org/abs/2403.19993
Why FLAMINGO is the perfect name for an array of Cherenkov telescopes
P. Flock, A. Laguna-Salina, F. James, G. Blossom, B. Carotene, C. Sparks, D. Tarek, A. Ahashia, J. Donald
This paper argues why FLAMINGO (Fast Light Atmospheric Monitoring and Imaging Novel Gamma-ray Observatory) is the perfect name for an array of very-high-energy Cherenkov telescopes. Studies which indicate pink is the most suitable pigment for the structures of Cherenkov telescopes have passed with flying colors. Pink optimizes the absorption and reflectivity properties of the telescopes with respect to the characteristic blue color of the Cherenkov radiation emitted by high-energy particles in the atmosphere. In addition to giving the sensitivity a big leg up, a pink color scheme also adds a unique and visually appealing aspect to the project's branding and outreach efforts. FLAMINGO has a fun and memorable quality that can help to increase public engagement and interest in astrophysics and also help to promote diversity in the field with its colorful nature. In an era of increasingly unpronounceable scientific acronyms, we are putting our foot down. FLAMINGO is particularly fitting, as flamingos have eyesight optimized to detect small particles, aligning with the primary purpose of Cherenkov telescopes to detect faint signals from air showers. We should not wait in the wings just wishing for new name to come along: in FLAMINGO we have an acronym that both accurately reflects the science behind Cherenkov telescopes and provides a visually striking identity for the project. While such a sea change will be no easy feet, we are glad to stick our necks out and try: FLAMINGO captures the essence of what an array of Cherenkov telescopes represents and can help to promote the science to a wider audience. We aim to create an experiment and brand that people from all walks of life will flock to.

https://arxiv.org/abs/2403.20143
Echoes from a long time ago: Chewbacca inflation
D. Sidious, S. Arcari, N. Barbieri, L. Bazzanini, L. Caloni, G. Galloni, R. Impavido, M. Lattanzi, M. Lembo, A. Raffaelli, N. Raffuzzi, S. S. Sirletti
The cosmic microwave background (CMB) radiation offers a unique avenue for exploring the early Universe's dynamics and evolution. In this paper, we delve into the fascinating realm of slow-roll inflation, contextualizing the primordial acoustic perturbations as the resonant echoes akin to the iconic sound of Chewbacca from the Star Wars universe. By extrapolating polynomial potentials for these primordial sounds, we illuminate their role in shaping the inflationary landscape. Leveraging this framework, we calculate the scalar spectral index (ns) and tensor-to-scalar ratio (r), providing insights into the underlying physics governing the inflationary epoch. Employing a rigorous chi-square (χ2) analysis, we meticulously scrutinize the Planck data combined with that offered by the BICEP/Keck collaboration to identify the Chewbacca sound profile that best aligns with observational constraints. Our findings not only shed light on the intricate interplay between sound and cosmology but also unveil intriguing parallels between the cosmic symphony of the early universe and beloved cultural icons.

https://arxiv.org/abs/2403.20144
FOOD I: A New Division Scheme For The Stelliferous Era
Stephen M. Wilkins, Sophie L. Newman, Will J. Roper
In recent years the James Webb Space Telescope has enabled the frontier of observational galaxy formation to push to ever higher redshift, deep within cosmic dawn. However, what is high-redshift, and when was cosmic dawn? While widely used, these terms (as well as many other confusing terms) are not consistently defined in the literature; this both hampers effective communication but also impedes our ability to precisely characterize and understand the phenomena under investigation. In this article we seek to address this issue of utmost importance. We begin by definitively defining terms such as ``high-redshift'', ``cosmic dawn'', etc. However, despite the rigorous definitions for them we present, both the adjective-based redshift and diurnal marker (time-of-day) division schemes suffer from issues including not being sufficiently granular, angering cosmologists, being arbitrary, and having a geocentric bias. To overcome these we introduce the \textit{redshiFt epOchs fOr everyboDy} (FOOD) framework, a revolutionary new division scheme based on eating occasions, i.e. meals.


https://arxiv.org/abs/2403.20223
The Public Photometry Pipelines for Exoplanets
Patricio E. Cubillos
Over the past decade, exoplanet atmospheric characterization has became what some might call the cosmology of astronomy. In an attempt to extract and understand the weak planetary signals (a few percent down to a few tens of ppm times that of their host-star signals), researchers have developed dozens of idealized planetary atmospheric models. Physical interpretations hinge on pretending that we understand stellar signals (as well behaved mostly temporarily static spherical cows), as well as planetary signals (as unidimensional objects, or sometimes quasi-multidimensional objects). The discovery of small and cool planets has lead to analyze planetary signals well below the designed photometric precision of current instrumentation. The challenge is up there, and keep us busy, so all is well. Here we present yet another open-source tool to analyze exoplanet data of time-series observations. The {\puppies} code is available via PyPI (\texttt{pip install exo-puppies}) and conda, the documentation is located at this https URL

https://arxiv.org/abs/2403.20268
In Violation of the Prime Directive: Simulating detriments to Delta-Quadrant civilizations from the starship Voyager's impact on planetary rings
J. Fowler, Ruth Murray-Clay

In the seven years that the starship Voyager spent in the Delta Quadrant, it used many questionable techniques to engage with alien civilizations and ultimately find its way home. From detailed studies of their logs and opening credits, we simulate Voyager's practice of orbiting a planet, to examine the effect on planetary rings. We outline a feasible planetary system and simulate the extent to which its rings would be disrupted. We find that Voyager's orbit could inflate the height of the rings in the vicinity of the spacecraft by a factor of 2, as well as increase the relative speeds of neighboring planetesimals within the rings. This increase in ring thickness has the potential to alter shadows on any moons of this planet, impacting ring-shadow based religions. Additionally, the acceleration of these planetesimals could rival their gravity, bucking any alien inhabitants and their tiny civilizations off of their planetesimal homeworlds. Finally, we posit that due to increased collisions amongst the planetesimals (which may harbor tiny intelligent life) the trajectory of these civilizations may be forever altered, violating the prime directive.

https://arxiv.org/abs/2403.20314
pastamarkers: astrophysical data visualization with pasta-like markers
PASTA Collaboration, N.Borghi, E.Ceccarelli, A.Della Croce, L.Leuzzi, L.Rosignoli, A.Traina
We aim at facilitating the visualization of astrophysical data for several tasks, such as uncovering patterns, presenting results to the community, and facilitating the understanding of complex physical relationships to the public. We present pastamarkers, a customized Python package fully compatible with matplotlib, that contains unique pasta-shaped markers meant to enhance the visualization of astrophysical data. We prove that using different pasta types as markers can improve the clarity of astrophysical plots by reproducing some of the most famous plots in the literature.

Мой фаворит:
https://arxiv.org/abs/2403.19749
Multi-Messenger Astrology
Gwen Walker, Nick Ekanger, R. Andrew Gustafson, Sean Heston
It has long been accepted that the cosmos determine our personalities, relationships, and even our fate. Unlike our condensed matter colleagues - who regularly use quantum mechanics to determine the healing properties of crystals - astrology techniques have been unchanged since the 19th century. In this paper, we discuss how astrophysical messengers beyond starlight can be used to predict the future and excuse an O(1) fraction of our negative personality traits.

Еще хороша
https://arxiv.org/abs/2403.20219
Circular reasoning: Solving the Hubble tension with a non-π value of π
Jonas El Gammal, Sven Günther, Emil Brinch Holm, Andreas Nygaard
Recently, cosmology has seen a surge in alternative models that purport to solve the discrepancy between the values of the Hubble constant H0 as measured by cosmological microwave background anisotropies and local supernovae, respectively. In particular, many of the most successful approaches have involved varying fundamental constants, such as an alternative value of the fine structure constant and time-varying values of the electron mass, the latter of which showed particular promise as the strongest candidate in several earlier studies. Inspired by these approaches, in this paper, we investigate a cosmological model where the value of the geometric constant π is taken to be a free model parameter. Using the latest CMB data from Planck as well as baryon-acoustic oscillation data, we constrain the parameters of the model and find a strong correlation between π and H0, with the final constraint H0=71.3±1.1 km/s/Mpc, equivalent to a mere 1.5σ discrepancy with the value measured by the SH0ES collaboration. Furthermore, our results show that π=3.206±0.038 at 95% C.L., which is in good agreement with several external measurements discussed in the paper. Hence, we conclude that the πΛCDM model presented in this paper, which has only a single extra parameter, currently stands as the perhaps strongest solution to the Hubble tension.

А вот тут не понял, насколько авторы шутят :)
https://arxiv.org/abs/2403.19957
Stupendously Large Black Hole Coalescence and Hubble Tensions
Earl Patrick Bellinger, Jakob Stegmann, Tom Wagg
Local and distant measurements of the Hubble constant are in significant tension: local measurements of the Hubble constant appear to show a Universe that is significantly contracted when compared to distant measurements. From the point of view of an observer, a passing gravitational wave could cause the Universe to appear locally contracted and expanded in a quadrupolar pattern. The inspiral of a pair of stupendously large black holes (SLABs) with a chirp mass of ∼1021 M⊙ may produce gravitational radiation with sufficiently large amplitude and wavelength to increase H0 in one direction, and decrease it by the same amount in the other. These tensions would then oscillate with a period corresponding to half the orbital period of the binary. If such a gravitational wave were aligned with the plane of the Milky Way, most readily visible galaxies would appear closer than they actually are, thereby causing the apparent Hubble tension. Due to the long binary period, we would be in the same phase of the gravitational wave for the complete history of astronomical observation. The opposite tension would be visible in the orthogonal directions, thus giving the opportunity to falsify the existence of inspiraling SLAB binaries. As a corollary, the Hubble tension may place an upper limit on the maximum mass of inspiraling black holes in the Universe.