Refinements and improvements to a phenomenological model for the jet opening angles of gamma-ray bursts by Tsitkin, Yelena

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The VLT-FLAMES Tarantula Survey: XXVII. Physical parameters of B-type main-sequence binary systems in the Tarantula nebula by Garland, R, Dufton, P, Evans, C, Crowther, P, Howarth, I, de Koter, A, , d, Grin, N, Langer, N, Lennon, D, McEvoy, C, Sana, H, Schneider, F, Símon Díaz, S, Taylor, W, Thompson, A, Vink, J

“…This result, which may be actually a consequence of the limitations of the pathfinder investigation presented in this paper, should be considered as a motivation for spectroscopic abundance analysis of large samples of binary stars, with high quality observational data.…”

Population of X-Ray Sources in the Intermediate-age Cluster NGC 3532: a Test Bed for Machine-learning Classification by Steven Chen, Oleg Kargaltsev, Hui Yang, Jeremy Hare, Igor Volkov, Blagoy Rangelov, John Tomsick

“…Thus, they are excellent laboratories for investigating stellar evolution, and X-ray properties of various types of stars (including binary stars, evolved stars, and compact objects). In this work, we investigate the population of X-ray sources in the nearby 300 Myr old open cluster NGC 3532 using Chandra X-ray Observatory and multiwavelength data from several surveys. …”
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A Census of the TW Hya Association with Gaia by K. L. Luhman

“…In a Gaia color–magnitude diagram, the members of TWA exhibit well-defined sequences of single stars and unresolved binary stars. The combined sequence of low-mass stars in TWA is indicative of an age of ${11.4}_{-1.2}^{+1.3}$ Myr when compared to the sequence for Upper Centaurus Lupus/Lower Centaurus Crux, for which an age of 20 Myr is assumed. …”
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Don’t Believe the Hype(r): The Yellow Supergiants of Westerlund 1 by Emma R. Beasor, Nathan Smith, Jennifer E. Andrews

“…The number of YSGs and their significant luminosity spread cannot be explained by simple population synthesis models with single or binary stars. Even with multiple ages or a large age spread, the high YSG/RSG ratio remains problematic. …”
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The Discovery of the Faintest Known Milky Way Satellite Using UNIONS by Simon E. T. Smith, William Cerny, Christian R. Hayes, Federico Sestito, Jaclyn Jensen, Alan W. McConnachie, Marla Geha, Julio F. Navarro, Ting S. Li, Jean-Charles Cuillandre, Raphaël Errani, Ken Chambers, Stephen Gwyn, Francois Hammer, Michael J. Hudson, Eugene Magnier, Nicolas Martin

“…While the presence of binary stars may be inflating the measurement, the possibility of a significant velocity dispersion makes Ursa Major III/UNIONS 1 a high-priority candidate for multi-epoch spectroscopic follow-ups to deduce the true nature of this incredibly faint satellite.…”
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A Dynamical Systems Approach to the Theory of Circumbinary Orbits in the Circular Restricted Problem by Andrew Langford, Lauren M. Weiss

“…To better understand the orbital dynamics of exoplanets around close binary stars, i.e., circumbinary planets (CBPs), we applied techniques from dynamical systems theory to a physically motivated set of solutions in the Circular Restricted Three-Body Problem (CR3BP). …”
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Ursa Major III/UNIONS 1: The Darkest Galaxy Ever Discovered? by Raphaël Errani, Julio F. Navarro, Simon E. T. Smith, Alan W. McConnachie

“…Its line-of-sight velocity dispersion suggests the presence of dark matter, although current measurements are inconclusive because of the unknown contribution to the dispersion of potential binary stars. We use N -body simulations to show that, if self-gravitating, the system could not survive in the Milky Way tidal field for much longer than a single orbit (roughly 0.4 Gyr), which strongly suggests that the system is stabilized by the presence of large amounts of dark matter. …”
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Solving the N-body problem in astrophysics by Hernandez, David Michael

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The SPHINX M-dwarf Spectral Grid. I. Benchmarking New Model Atmospheres to Derive Fundamental M-dwarf Properties by Aishwarya R. Iyer, Michael R. Line, Philip S. Muirhead, Jonathan J. Fortney, Ehsan Gharib-Nezhad

“…We then validate our grid models by determining fundamental properties ( T _eff , log g , [M/H], radius, and C/O) for 10 benchmark M+G binary stars with known host metallicities and 10 M dwarfs with interferometrically measured angular diameters. …”
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A study of compact objects: stellar evolution models and X-ray binaries by du Buisson, L

Hidden Spectra Treasures in the Foster Archive: A Pilot Study of the Be Stars <i>α</i> Eri, <i>α</i> Col, <i>ω</i> Car and <i>η</i> Cen by Catalina Arcos, Leonardo Vanzi, Nikolaus Vogt, Stefano Garcia, Virginia Ortiz, Ester Acuña

“…The spectra present in the archive are mostly those of bright variable or binary stars observed at different epochs. We developed a method of digitalization and data processing for the plates and verified it through the analysis of a selected sample of spectra. …”
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The Light Curve of the Weakly-Accreting T Tauri Binary KH 15D from 2005-10: Insights into the Nature of its Protoplanetary Disk by Herbst, William, LeDuc, Katherine, Hamilton, Catrina M., Winn, Joshua Nathan, Ibrahimov, Mansur, Mundt, Reinhard, Johns-Krull, Christopher M.

“…The data support a picture of the circumbinary disk as a geometrically thin, optically thick layer of perhaps millimeter- or centimeter-sized particles that has been sculpted by the binary stars and possibly other components into a decidedly nonplanar configuration. …”
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