Zobrazeno 1 - 10
of 41
pro vyhledávání: '"Beane, Angus"'
Autor:
Beane, Angus, Johnson, James, Semenov, Vadim, Hernquist, Lars, Chandra, Vedant, Conroy, Charlie
The Milky Way hosts at least two modes in its present day distribution of Fe and alpha-elements. The exact cause of this bimodality is disputed, but one class of explanations involves the merger between the Milky Way and a relatively massive satellit
Externí odkaz:
http://arxiv.org/abs/2410.21580
Galactic bars and their associated resonances play a significant role in shaping galaxy evolution. Resulting resonance-driven structures, like the vertically extended Boxy/Peanut X-Feature (BPX), then serve as a useful probe of the host galaxy's hist
Externí odkaz:
http://arxiv.org/abs/2410.08277
Autor:
Beane, Angus
The elemental abundance distribution of stars encodes the history of the gas-phase abundance in the Milky Way. Without a large, unbiased sample of highly precise stellar ages, the exact timing and nature of this history must be inferred from the abun
Externí odkaz:
http://arxiv.org/abs/2407.07985
The early stages of the Epoch of Reionization, probed by the 21 cm line, are sensitive to the detailed properties and formation histories of the first galaxies. We use 21cmFAST and a simple, self-consistent galaxy model to examine the redshift evolut
Externí odkaz:
http://arxiv.org/abs/2404.08266
Autor:
Li, Zhi, Du, Min, Debattista, Victor P., Shen, Juntai, Li, Hui, Liu, Jie, Vogelsberger, Mark, Beane, Angus, Marinacci, Federico, Sales, Laura V.
Gas flows in the presence of two independently-rotating nested bars remain not fully understood, which is likely to play an important role in fueling the central black hole. We use high-resolution hydrodynamical simulations with detailed models of su
Externí odkaz:
http://arxiv.org/abs/2310.04666
Autor:
Beane, Angus, Hernquist, Lars, D'Onghia, Elena, Marinacci, Federico, Conroy, Charlie, Qi, Jia, Sales, Laura V., Torrey, Paul, Vogelsberger, Mark
Elongated bar-like features are ubiquitous in galaxies, occurring at the centers of approximately two-thirds of spiral disks in the nearby Universe. Due to gravitational interactions between the bar and the other components of galaxies, it is expecte
Externí odkaz:
http://arxiv.org/abs/2209.03364
Autor:
Tu, Alan J., Zucker, Catherine, Speagle, Joshua S., Beane, Angus, Goodman, Alyssa, Alves, João, Faherty, Jacqueline, Burkert, Andreas
Publikováno v:
ApJ 936 57 (2022)
We present an analysis of the kinematics of the Radcliffe Wave, a 2.7-kpc-long sinusoidal band of molecular clouds in the solar neighborhood recently detected via 3D dust mapping. With Gaia DR2 astrometry and spectroscopy, we analyze the 3D space vel
Externí odkaz:
http://arxiv.org/abs/2208.06469
We model the 21cm power spectrum across the Cosmic Dawn and the Epoch of Reionization (EoR) in fuzzy dark matter (FDM) cosmologies. The suppression of small mass halos in FDM models leads to a delay in the onset redshift of these epochs relative to c
Externí odkaz:
http://arxiv.org/abs/2101.07177
Autor:
Angus, Ruth, Beane, Angus, Price-Whelan, Adrian M., Newton, Elisabeth, Curtis, Jason L., Berger, Travis, van Saders, Jennifer, Kiman, Rocio, Foreman-Mackey, Daniel, Lu, Yuxi, Anderson, Lauren, Faherty, Jacqueline K.
The rotational evolution of cool dwarfs is poorly constrained after around 1-2 Gyr due to a lack of precise ages and rotation periods for old main-sequence stars. In this work we use velocity dispersion as an age proxy to reveal the temperature-depen
Externí odkaz:
http://arxiv.org/abs/2005.09387
Autor:
Ness, Melissa K., Johnston, Kathryn V., Blancato, Kirsten, Rix, Hans-Walter, Beane, Angus, Bird, Jonathan C., Hawkins, Keith
We explore the structure of the element abundance--age--orbit distribution of the stars in the Milky Way's low-$\alpha$ disk, by (re-)deriving precise [Fe/H], [X/Fe] and ages, along with orbits, for red clump stars from the APOGEE survey. There has b
Externí odkaz:
http://arxiv.org/abs/1907.10606