Outputs (33)

The weak lensing radial acceleration relation: Constraining modified gravity and cold dark matter theories with KiDS-1000 (2021)
Journal Article
Brouwer, M. M., Oman, K. A., Valentijn, E. A., Bilicki, M., Heymans, C., Hoekstra, H., Napolitano, N. R., Roy, N., Tortora, C., Wright, A. H., Asgari, M., van den Busch, J. L., Dvornik, A., Erben, T., Giblin, B., Graham, A. W., Hildebrandt, H., Hopkins, A. M., Kannawadi, A., Kuijken, K., …Visser, M. (2021). The weak lensing radial acceleration relation: Constraining modified gravity and cold dark matter theories with KiDS-1000. Astronomy & Astrophysics, 650, Article A113. https://doi.org/10.1051/0004-6361/202040108

We present measurements of the radial gravitational acceleration around isolated galaxies, comparing the expected gravitational acceleration given the baryonic matter (gbar) with the observed gravitational acceleration (gobs), using weak lensing meas... Read More about The weak lensing radial acceleration relation: Constraining modified gravity and cold dark matter theories with KiDS-1000.

Velocity-dependent J-factors for annihilation radiation from cosmological simulations (2021)
Journal Article
Board, E., Bozorgnia, N., Strigari, L. E., Grand, R. J., Fattahi, A., Frenk, C. S., Marinacci, F., Navarro, J. F., & Oman, K. A. (2021). Velocity-dependent J-factors for annihilation radiation from cosmological simulations. Journal of Cosmology and Astroparticle Physics, 2021(04), Article 070. https://doi.org/10.1088/1475-7516/2021/04/070

We determine the dark matter pair-wise relative velocity distribution in a set of Milky Way-like halos in the Auriga and APOSTLE simulations. Focusing on the smooth halo component, the relative velocity distribution is well-described by a Maxwell-Bol... Read More about Velocity-dependent J-factors for annihilation radiation from cosmological simulations.

A homogeneous measurement of the delay between the onsets of gas stripping and star formation quenching in satellite galaxies of groups and clusters (2021)
Journal Article
Oman, K. A., Bahé, Y. M., Healy, J., Hess, K. M., Hudson, M. J., & Verheijen, M. A. (2021). A homogeneous measurement of the delay between the onsets of gas stripping and star formation quenching in satellite galaxies of groups and clusters. Monthly Notices of the Royal Astronomical Society, 501(4), 5073-5095. https://doi.org/10.1093/mnras/staa3845

We combine orbital information from N-body simulations with an analytic model for star formation quenching and SDSS observations to infer the differential effect of the group/cluster environment on star formation in satellite galaxies. We also consid... Read More about A homogeneous measurement of the delay between the onsets of gas stripping and star formation quenching in satellite galaxies of groups and clusters.

Stellar splashback: the edge of the intracluster light (2020)
Journal Article
Deason, A. J., Oman, K. A., Fattahi, A., Schaller, M., Jauzac, M., Zhang, Y., Montes, M., Bahé, Y. M., Dalla Vecchia, C., Kay, S. T., & Evans, T. A. (2021). Stellar splashback: the edge of the intracluster light. Monthly Notices of the Royal Astronomical Society, 500(3), 4181-4192. https://doi.org/10.1093/mnras/staa3590

We examine the outskirts of galaxy clusters in the C-EAGLE simulations to quantify the ‘edges’ of the stellar and dark matter distribution. The radius of the steepest slope in the dark matter, commonly used as a proxy for the splashback radius, is lo... Read More about Stellar splashback: the edge of the intracluster light.

To β or not to β: can higher-order Jeans analysis break the mass–anisotropy degeneracy in simulated dwarfs? (2020)
Journal Article
Genina, A., Read, J., Frenk, C., Cole, S., Benítez-Llambay, A., Ludlow, A., Navarro, J., Oman, K., & Robertson, A. (2020). To β or not to β: can higher-order Jeans analysis break the mass–anisotropy degeneracy in simulated dwarfs?. Monthly Notices of the Royal Astronomical Society, 498(1), 144-163. https://doi.org/10.1093/mnras/staa2352

We test a non-parametric higher-order Jeans analysis method, GRAVSPHERE, on 32 simulated dwarf galaxies comparable to classical Local Group dwarfs like Fornax. The galaxies are selected from the APOSTLE suite of cosmological hydrodynamics simulations... Read More about To β or not to β: can higher-order Jeans analysis break the mass–anisotropy degeneracy in simulated dwarfs?.

Massive disc galaxies too dominated by dark matter in cosmological hydrodynamical simulations (2020)
Journal Article
Marasco, A., Posti, L., Oman, K., Famaey, B., Cresci, G., & Fraternali, F. (2020). Massive disc galaxies too dominated by dark matter in cosmological hydrodynamical simulations. Astronomy & Astrophysics, 640, Article A70. https://doi.org/10.1051/0004-6361/202038326

We investigated the disc-halo connection in massive (M⋆ >  5 × 1010 M⊙) disc galaxies from the cosmological hydrodynamical simulations EAGLE and IllustrisTNG, and compared this connection with that inferred from the study of H I rotation curves in ne... Read More about Massive disc galaxies too dominated by dark matter in cosmological hydrodynamical simulations.

The Edge of the Galaxy (2020)
Journal Article
Deason, A. J., Fattahi, A., Frenk, C. S., Grand, R. J., Oman, K. A., Garrison-Kimmel, S., Simpson, C. M., & Navarro, J. F. (2020). The Edge of the Galaxy. Monthly Notices of the Royal Astronomical Society, 496(3), 3929-3942. https://doi.org/10.1093/mnras/staa1711

We use cosmological simulations of isolated Milky Way (MW)-mass galaxies, as well as Local Group (LG) analogues, to define the ‘edge’ – a caustic manifested in a drop in density or radial velocity – of Galactic-sized haloes, both in dark matter and i... Read More about The Edge of the Galaxy.

Robust H i kinematics of gas-rich ultra-diffuse galaxies: hints of a weak-feedback formation scenario (2020)
Journal Article
Mancera Piña, P. E., Fraternali, F., Oman, K. A., Adams, E. A., Bacchini, C., Marasco, A., Oosterloo, T., Pezzulli, G., Posti, L., Leisman, L., Cannon, J. M., di Teodoro, E. M., Gault, L., Haynes, M. P., Reiter, K., Rhode, K. L., Salzer, J. J., & Smith, N. J. (2020). Robust H i kinematics of gas-rich ultra-diffuse galaxies: hints of a weak-feedback formation scenario. Monthly Notices of the Royal Astronomical Society, 495(4), 3636-3655. https://doi.org/10.1093/mnras/staa1256

We study the gas kinematics of a sample of six isolated gas-rich low surface brightness galaxies, of the class called ultra-diffuse galaxies (UDGs). These galaxies have recently been shown to be outliers from the baryonic Tully–Fisher relation (BTFR)... Read More about Robust H i kinematics of gas-rich ultra-diffuse galaxies: hints of a weak-feedback formation scenario.

Baryonic clues to the puzzling diversity of dwarf galaxy rotation curves (2020)
Journal Article
Santos-Santos, I. M., Navarro, J. F., Robertson, A., Benítez-Llambay, A., Oman, K. A., Lovell, M. R., Frenk, C. S., Ludlow, A. D., Fattahi, A., & Ritz, A. (2020). Baryonic clues to the puzzling diversity of dwarf galaxy rotation curves. Monthly Notices of the Royal Astronomical Society, 495(1), 58-77. https://doi.org/10.1093/mnras/staa1072

We use a compilation of disc galaxy rotation curves to assess the role of the luminous component (‘baryons’) in the rotation curve diversity problem. As in earlier work, we find that rotation curve shape correlates with baryonic surface density: high... Read More about Baryonic clues to the puzzling diversity of dwarf galaxy rotation curves.

The Milky Way total mass profile as inferred from Gaia DR2 (2020)
Journal Article
Cautun, M., Benítez-Llambay, A., Deason, A. J., Frenk, C. S., Fattahi, A., Gómez, F. A., Grand, R. J., Oman, K. A., Navarro, J. F., & Simpson, C. M. (2020). The Milky Way total mass profile as inferred from Gaia DR2. Monthly Notices of the Royal Astronomical Society, 494(3), 4291-4313. https://doi.org/10.1093/mnras/staa1017

We determine the Milky Way (MW) mass profile inferred from fitting physically motivated models to the Gaia DR2 Galactic rotation curve and other data. Using various hydrodynamical simulations of MW-mass haloes, we show that the presence of baryons in... Read More about The Milky Way total mass profile as inferred from Gaia DR2.