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Jan 25, 2025 | 
academic.oup.com | Rua das Estrelas |Burnaby Road
Gravitational waves (GWs) have rapidly become important cosmological probes since their first detection in 2015. As the number of detected events continues to rise, upcoming instruments like Einstein Telescope (ET) and Cosmic Explorer (CE) will observe millions of compact binary (CB) mergers.
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Sep 28, 2024 | 
academic.oup.com | Max-Planck-Institut für Astronomie |Burnaby Road
Bars are expected to impact the distribution of stellar populations both during bar formation, as they rearrange stars into new orbits, and afterwards, due to the redistribution of star-formation-fuelling gas and transfer of angular momentum. We study the impact of stellar bars on the azimuthal variation of stellar population age, metallicity and mass surface density in ∼1 000 nearby barred galaxies from the SDSS-IV/MaNGA survey.
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Aug 15, 2024 | 
academic.oup.com | Burnaby Road
We present a morphological analysis of 29 spectroscopically confirmed members of XLSSC 122, a massive galaxy cluster at z = 1.98. We perform photometry using Statmorph on images of the cluster members from the Hubble Space Telescope (HST) Wide Field Camera (WFC3) in the F140W band.
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Jun 5, 2024 | 
academic.oup.com | Burnaby Road |Ana Sainz |Ana Sáinz |Lehman College |de Murieta
Gravitational lensing is a powerful probe for understanding astrophysics and cosmology. Lensing is of particular use for constraining the expansion history of the Universe, since it is a geometric probe of the angular diameter distances between observer, lens, and source (Narayan 1991). When a time-variable source is multiply imaged by a gravitational lens, the time delays between images are inversely proportional to the Hubble constant H (Treu & Marshall 2016).
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Apr 3, 2024 | 
academic.oup.com | Burnaby Road |Space science |Abu Dhabi
Carbon- and Oxygen-rich stars populating the Thermally-Pulsing Asymptotic Giant Branch (TP-AGB) phase of stellar evolution are relevant contributors to the spectra of ∼1 Gyr old populations. Atmosphere models for these types are uncertain, due to complex molecules and mass-loss effects. Empirical spectra are then crucial, but samples are small due to the short (∼3 Myr) TP-AGB lifetime.
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Mar 20, 2024 | 
academic.oup.com | Space Research |Carnegie Mellon |Burnaby Road
We quantify the cosmological spread of baryons relative to their initial neighboring dark matter distribution using thousands of state-of-the-art simulations from the Cosmology and Astrophysics with MachinE Learning Simulations (CAMELS) project. We show that dark matter particles spread relative to their initial neighboring distribution owing to chaotic gravitational dynamics on spatial scales comparable to their host dark matter halo.
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Mar 20, 2024 | 
academic.oup.com | Space Research |Carnegie Mellon |Burnaby Road
Investigating the distribution of matter in the Universe reveals many clues about its origin, content, and fate. Cosmological parameters such as the density of matter (Ω ) and the present-day linear amplitude of matter fluctuations (σ ) can be constrained by comparing theoretical predictions to observations from the cosmic microwave background (Planck Collaboration 2020), galaxy clustering (Cole et al. 2005; Eisenstein et al. 2005), and weak lensing surveys (Hadzhiyska et al. 2021; Huang et al.
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Oct 12, 2023 | 
academic.oup.com | Burnaby Road
The connection between active galactic nuclei (AGN) and starbursts has been a vigorous topic of research since the 1980s. Initially, much of the debate in the field was focused on whether certain classes of AGN could be entirely powered by star formation rather than by accreting black holes.
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Aug 11, 2023 | 
academic.oup.com | Université de Genève |Burnaby Road
We present a random forest framework for predicting circumgalactic medium (CGM) physical conditions from quasar absorption line observables, trained on a sample of Voigt profile-fit synthetic absorbers from the Simba cosmological simulation.
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Jun 21, 2023 | 
academic.oup.com | Shanghai Jiao Tong |Burnaby Road
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