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Astronomers generally assume planet-forming disks are aligned with the rotation of their host star. However, recent observations have shown evidence of warping in protoplanetary disks. One can measure the statistical alignment between the…

Solar and Stellar Astrophysics · Physics 2025-04-07 Matthew J. Fields , Andrew W. Mann , Aurora Kesseli , Andrew W. Boyle

We make use of a previous well tested Galactic model, but describing the observational behavior of the various stellar components in terms of suitable assumptions on their evolutionary status. In this way we are able to predict the expected…

Astrophysics · Physics 2009-11-07 V. Castellani , M. Cignoni , S. Degl'Innocenti , S. Petroni , P. G. Prada Moroni

Assuming the existence of a certain hod pair with a Woodin cardinal that is a limit of Woodin cardinals, we show that the Chang model satisfies $\mathsf{AD}^+$ in any set generic extensions.

Logic · Mathematics 2023-02-14 Takehiko Gappo , Grigor Sargsyan

We study stars in M theory. First, we obtain the analog of Oppenheimer -- Volkoff equations in a suitably general set up. We obtain analytically the asymptotic solutions to these equations when the equations of state are linear. We study…

High Energy Physics - Theory · Physics 2014-04-29 S. Kalyana Rama

We present a self-contained account of Woodin's extender algebra and its use in proving absoluteness results, including a proof of the $\Sigma^2_1$-absoluteness theorem. We also include a proof that the existence of an inner model with…

Logic · Mathematics 2016-08-23 Ilijas Farah

Abridged. White dwarf stars are the final evolutionary stage of the vast majority of stars, including our Sun. The study of white dwarfs has potential applications to different fields of astrophysics. In particular, they can be used as…

Solar and Stellar Astrophysics · Physics 2016-08-09 Leandro G. Althaus , Alejandro H. Córsico , Jordi Isern , Enrique García-Berro

The advent of space-based photometry missions in the early 21st century enabled the application to asteroseismic data of advanced inference techniques until then restricted to the field of helioseismology. The high quality of the…

Solar and Stellar Astrophysics · Physics 2022-06-24 Gaël Buldgen , Jérôme Bétrisey , Ian W. Roxburgh , Sergei V. Vorontsov , Daniel R. Reese

In this chapter I give an overall description of the structure and evolution of stars of different masses, and review the main ingredients included in state-of-the-art calculations aiming at reproducing observational features. I give…

Solar and Stellar Astrophysics · Physics 2017-12-27 Víctor Silva Aguirre

White dwarfs (WDs) in open star clusters are a highly useful ensemble of stars. While numerous researchers use open cluster WDs to study the initial-final mass relation, numerous other evolutionary studies are also enabled by this sample of…

Solar and Stellar Astrophysics · Physics 2020-10-14 Kurtis A. Williams

We aim to provide new empirical clues about macroturbulent spectral line broadening in O- and B-type stars to evaluate its physical origin. We use high-resolution spectra of ~430 stars with spectral types in the range O4-B9 (all luminosity…

Solar and Stellar Astrophysics · Physics 2016-12-21 S. Simón-Díaz , M. Godart , N. Castro , A. Herrero , C. Aerts , J. Puls , J. Telting , L. Grassitelli

This paper presents a type theory in which it is possible to directly manipulate $n$-dimensional cubes (points, lines, squares, cubes, etc.) based on an interpretation of dependent type theory in a cubical set model. This enables new ways…

Logic in Computer Science · Computer Science 2016-11-14 Cyril Cohen , Thierry Coquand , Simon Huber , Anders Mörtberg

We study a class of Newtonian models for the deformations of non-magnetized neutron stars during their spin-down. The models have all an analytical solution, and thus allow to understand easily the dependence of the strain on the star's…

High Energy Astrophysical Phenomena · Physics 2020-10-26 Elia Giliberti , Marco Antonelli , Gabriele Cambiotti , Pierre Pizzochero

This work provides a smooth and everywhere well-defined extension of Bondi-Metzner-Sachs (BMS) supertranslations into the bulk of Minkowski space. The supertranslations lead to physically distinct spacetimes, all isometric to Minkowski…

General Relativity and Quantum Cosmology · Physics 2018-02-20 Friedrich Schöller

The Hardy-Littlewood-Polya inequality of majorization is extended for the {\omega}-m-star-convex functions to the framework of ordered Banach spaces. Several open problems which seem of interest for further extensions of the…

Classical Analysis and ODEs · Mathematics 2022-07-19 Geanina Maria Lachescu , Ionel Roventa

Open and globular star clusters have served as benchmarks for the study of stellar evolution due to their supposed nature as simple stellar populations of the same age and metallicity. After a brief review of some of the pioneering work…

Astrophysics of Galaxies · Physics 2015-05-14 Jason S. Kalirai , Harvey B. Richer

Massive stars play a major role not only in stellar evolution but also galactic evolution theory. This is because of their dynamical interaction with binary companions, and because their strong winds and explosive deaths as supernovae…

Solar and Stellar Astrophysics · Physics 2023-12-14 Dominic M. Bowman

Transport is an important function in many network systems and understanding its behavior on biological, social, and technological networks is crucial for a wide range of applications. However, it is a property that is not well-understood…

Disordered Systems and Neural Networks · Physics 2009-11-13 Lazaros K. Gallos , Chaoming Song , Shlomo Havlin , Hernan A. Makse

This paper studies the complexity of classical modal logics and of their extension with fixed-point operators, using translations to transfer results across logics. In particular, we show several complexity results for multi-agent logics…

Logic in Computer Science · Computer Science 2022-09-22 Luca Aceto , Antonis Achilleos , Elli Anastasiadi , Adrian Francalanza , Anna Ingolfsdottir

Machine learning techniques have been successfully used to classify variable stars on widely-studied astronomical surveys. These datasets have been available to astronomers long enough, thus allowing them to perform deep analysis over…

Instrumentation and Methods for Astrophysics · Physics 2018-01-31 Patricio Benavente , Pavlos Protopapas , Karim Pichara

Massive stars condition the evolution of the interstellar medium by the amount of energy released during their lives and especially by their deaths as supernova explosions. The vast amounts of spectroscopic data for massive stars provided…

Solar and Stellar Astrophysics · Physics 2024-01-11 Klaus Rubke , Amparo Marco , Ignacio Negueruela , Artemio Herrero , Sergio Simon-Diaz , Hugo Tabernero , Lee Patrick