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Dr Mark Lovell's Outputs (18)

A warm dark matter cosmogony may yield more low-mass galaxy detections in 21-cm surveys than a cold dark matter one (2024)
Journal Article
Oman, K. A., Frenk, C. S., Crain, R. A., Lovell, M. R., & Pfeffer, J. (2024). A warm dark matter cosmogony may yield more low-mass galaxy detections in 21-cm surveys than a cold dark matter one. Monthly Notices of the Royal Astronomical Society, 533(1), 67-78. https://doi.org/10.1093/mnras/stae1772

The 21-cm spectral line widths, w50, of galaxies are an approximate tracer of their dynamical masses, such that the dark matter halo mass function is imprinted in the number density of galaxies as a function of w50. Correcting observed number counts... Read More about A warm dark matter cosmogony may yield more low-mass galaxy detections in 21-cm surveys than a cold dark matter one.

Predicting the XRISM dark matter decay signal in the Milky Way halo (2024)
Journal Article
Lovell, M. R. (2024). Predicting the XRISM dark matter decay signal in the Milky Way halo. Monthly Notices of the Royal Astronomical Society, 529(4), 4050-4055. https://doi.org/10.1093/mnras/stae775

Dark matter may be detected in X-ray decay, including from the decay of the dark matter particles that make up the Milky Way (MW) halo. We use a range of density profiles to compute X-ray line intensity profiles, with a focus on the resonantly produc... Read More about Predicting the XRISM dark matter decay signal in the Milky Way halo.

The onset of gravothermal core collapse in velocity-dependent self-interacting dark matter subhaloes (2021)
Journal Article
Turner, H. C., Lovell, M. R., Zavala, J., & Vogelsberger, M. (2021). The onset of gravothermal core collapse in velocity-dependent self-interacting dark matter subhaloes. Monthly Notices of the Royal Astronomical Society, 505(4), 5327-5339. https://doi.org/10.1093/mnras/stab1725

It has been proposed that gravothermal collapse due to dark matter self-interactions (i.e. self-interacting dark matter, SIDM) can explain the observed diversity of the Milky Way (MW) satellites’ central dynamical masses. We investigate the process b... Read More about The onset of gravothermal core collapse in velocity-dependent self-interacting dark matter subhaloes.

Local group star formation in warm and self-interacting dark matter cosmologies (2020)
Journal Article
Lovell, M., Hellwing, W., Ludlow, A., Zavala, J., Robertson, A., Fattahi, A., Frenk, C., & Hardwick, J. (2020). Local group star formation in warm and self-interacting dark matter cosmologies. Monthly Notices of the Royal Astronomical Society, 498(1), 702-717. https://doi.org/10.1093/mnras/staa2525

The nature of the dark matter can affect the collapse time of dark matter haloes, and can therefore be imprinted in observables such as the stellar population ages and star formation histories of dwarf galaxies. In this paper, we use high-resolution... Read More about Local group star formation in warm and self-interacting dark matter cosmologies.

Exploiting flux ratio anomalies to probe warm dark matter in future large-scale surveys (2019)
Journal Article
Harvey, D., Valkenburg, W., Tamone, A., Boyarsky, A., Courbin, F., & Lovell, M. (2020). Exploiting flux ratio anomalies to probe warm dark matter in future large-scale surveys. Monthly Notices of the Royal Astronomical Society, 491(3), 4247-4253. https://doi.org/10.1093/mnras/stz3305

Flux ratio anomalies in strong gravitationally lensed quasars constitute a unique way to probe the abundance of non-luminous dark matter haloes, and hence the nature of dark matter. In this paper, we identify double-imaged quasars as a statistically... Read More about Exploiting flux ratio anomalies to probe warm dark matter in future large-scale surveys.

The lensing properties of subhaloes in massive elliptical galaxies in sterile neutrino cosmologies (2019)
Journal Article
Despali, G., Lovell, M., Vegetti, S., Crain, R. A., & Oppenheimer, B. D. (2020). The lensing properties of subhaloes in massive elliptical galaxies in sterile neutrino cosmologies. Monthly Notices of the Royal Astronomical Society, 491(1), 1295-1310. https://doi.org/10.1093/mnras/stz3068

We use high-resolution hydrodynamical simulations run with the EAGLE model of galaxy formation to study the differences between the properties of – and subsequently the lensing signal from – subhaloes of massive elliptical galaxies at redshift 0.2, i... Read More about The lensing properties of subhaloes in massive elliptical galaxies in sterile neutrino cosmologies.

Diverse dark matter density at sub-kiloparsec scales in Milky Way satellites: Implications for the nature of dark matter (2019)
Journal Article
Zavala, J., Lovell, M. R., Vogelsberger, M., & Burger, J. D. (2019). Diverse dark matter density at sub-kiloparsec scales in Milky Way satellites: Implications for the nature of dark matter. Physical Review D, 100(6), Article 063007. https://doi.org/10.1103/physrevd.100.063007

Milky Way (MW) satellites reside within dark matter (DM) subhalos with a broad distribution of circular velocity profiles. This diversity is enhanced with the inclusion of ultrafaint satellites, which seemingly have very high DM densities, albeit wit... Read More about Diverse dark matter density at sub-kiloparsec scales in Milky Way satellites: Implications for the nature of dark matter.

Simulating the Dark Matter Decay Signal from the Perseus Galaxy Cluster (2019)
Journal Article
Lovell, M. R., Iakubovskyi, D., Barnes, D., Bose, S., Frenk, C. S., Theuns, T., & Hellwing, W. A. (2019). Simulating the Dark Matter Decay Signal from the Perseus Galaxy Cluster. Astrophysical Journal Letters, 875(2), Article L24. https://doi.org/10.3847/2041-8213/ab13ac

the C-EAGLE simulations of galaxy clusters to predict the flux, width, and shape of a dark matter decay line, paying particular attention to the unexplained 3.55keV line detected in the spectra of some galaxies and clusters, and the upcoming XRISM X... Read More about Simulating the Dark Matter Decay Signal from the Perseus Galaxy Cluster.

The signal of decaying dark matter with hydrodynamical simulations (2019)
Journal Article
Lovell, M. R., Barnes, D., Bahé, Y., Schaye, J., Schaller, M., Theuns, T., Bose, S., Crain, R. A., Vecchia, C. D., Frenk, C. S., Hellwing, W., Kay, S. T., Ludlow, A. D., & Bower, R. G. (2019). The signal of decaying dark matter with hydrodynamical simulations. Monthly Notices of the Royal Astronomical Society, 485(3), 4071-4089. https://doi.org/10.1093/mnras/stz691

Dark matter particles may decay, emitting photons. Drawing on the EAGLE family of hydrodynamic simulations of galaxy formation – including the APOSTLE and C-EAGLE simulations – we assess the systematic uncertainties and scatter on the decay flux from... Read More about The signal of decaying dark matter with hydrodynamical simulations.

Constraining sterile neutrino cosmologies with strong gravitational lensing observations at redshift z ∼ 0.2 (2018)
Journal Article
Vegetti, S., Despali, G., Lovell, M., & Enzi, W. (2018). Constraining sterile neutrino cosmologies with strong gravitational lensing observations at redshift z ∼ 0.2. Monthly Notices of the Royal Astronomical Society, 481(3), 3661-3669. https://doi.org/10.1093/mnras/sty2393

We use the observed amount of subhaloes and line-of-sight dark matter haloes in a sample of 11 gravitational lens systems from the Sloan Lens ACS Survey to constrain the free-streaming properties of the dark matter particles. In particular, we combin... Read More about Constraining sterile neutrino cosmologies with strong gravitational lensing observations at redshift z ∼ 0.2.

The fraction of dark matter within galaxies from the IllustrisTNG simulations (2018)
Journal Article
Lovell, M. R., Pillepich, A., Genel, S., Nelson, D., Springel, V., Pakmor, R., …Hernquist, L. (2018). The fraction of dark matter within galaxies from the IllustrisTNG simulations. Monthly Notices of the Royal Astronomical Society, 481(2), 1950-1975. https://doi.org/10.1093/mnras/sty2339

We use the IllustrisTNG (TNG) cosmological simulations to provide theoretical expectations for the dark matter mass fractions (DMFs) and circular velocity profiles of galaxies. TNG predicts flat circular velocity curves for z = 0 Milky Way (MW)-like... Read More about The fraction of dark matter within galaxies from the IllustrisTNG simulations.

ETHOS – an effective theory of structure formation: predictions for the high-redshift Universe – abundance of galaxies and reionization (2018)
Journal Article
Lovell, M. R., Zavala, J., Vogelsberger, M., Shen, X., Cyr-Racine, F.-Y., Pfrommer, C., Sigurdson, K., Boylan-Kolchin, M., & Pillepich, A. (2018). ETHOS – an effective theory of structure formation: predictions for the high-redshift Universe – abundance of galaxies and reionization. Monthly Notices of the Royal Astronomical Society, 477(3), 2886-2899. https://doi.org/10.1093/mnras/sty818

We contrast predictions for the high-redshift galaxy population and reionization history between cold dark matter (CDM) and an alternative self-interacting dark matter model based on the recently developed ETHOS framework that alleviates the small-sc... Read More about ETHOS – an effective theory of structure formation: predictions for the high-redshift Universe – abundance of galaxies and reionization.

The galaxy population in cold and warm dark matter cosmologies (2017)
Journal Article
Wang, L., Gonzalez-Perez, V., Xie, L., Cooper, A., Frenk, C., Gao, L., …Jiang, L. (2017). The galaxy population in cold and warm dark matter cosmologies. Monthly Notices of the Royal Astronomical Society, 468(4), 4579-4591. https://doi.org/10.1093/mnras/stx788

We use a pair of high-resolution N-body simulations implementing two dark matter models, namely the standard cold dark matter (CDM) cosmogony and a warm dark matter (WDM) alternative where the dark matter particle is a 1.5 keV thermal relic. We combi... Read More about The galaxy population in cold and warm dark matter cosmologies.

Properties of Local Group galaxies in hydrodynamical simulations of sterile neutrino dark matter cosmologies (2017)
Journal Article
Lovell, M., Bose, S., Boyarsky, A., Crain, R., Frenk, C., Hellwing, W., …Theuns, T. (2017). Properties of Local Group galaxies in hydrodynamical simulations of sterile neutrino dark matter cosmologies. Monthly Notices of the Royal Astronomical Society, 468(4), 4285-4298. https://doi.org/10.1093/mnras/stx654

We study galaxy formation in sterile neutrino dark matter models that differ significantly from both cold and from ‘warm thermal relic’ models. We use the EAGLE code to carry out hydrodynamic simulations of the evolution of pairs of galaxies chosen t... Read More about Properties of Local Group galaxies in hydrodynamical simulations of sterile neutrino dark matter cosmologies.

Addressing the too big to fail problem with baryon physics and sterile neutrino dark matter (2017)
Journal Article
Lovell, M., Gonzalez-Perez, V., Bose, S., Boyarsky, A., Cole, S., Frenk, C., & Ruchayskiy, O. (2017). Addressing the too big to fail problem with baryon physics and sterile neutrino dark matter. Monthly Notices of the Royal Astronomical Society, 468(3), 2836-2849. https://doi.org/10.1093/mnras/stx621

N-body dark matter simulations of structure formation in the Λ cold dark matter (ΛCDM) model predict a population of subhaloes within Galactic haloes that have higher central densities than inferred for the Milky Way satellites, a tension known as th... Read More about Addressing the too big to fail problem with baryon physics and sterile neutrino dark matter.

The properties of warm dark matter haloes (2014)
Journal Article
Lovell, M. R., Frenk, C. S., Eke, V. R., Jenkins, A., Gao, L., & Theuns, T. (2014). The properties of warm dark matter haloes. Monthly Notices of the Royal Astronomical Society, 439(1), 300-317. https://doi.org/10.1093/mnras/stt2431

Well-motivated elementary particle candidates for the dark matter, such as the sterile neutrino, behave as warm dark matter (WDM). For particle masses of the order of a keV, free streaming produces a cutoff in the linear fluctuation power spectrum at... Read More about The properties of warm dark matter haloes.