Inflation, large-scale structure and inhomogeneous cosmologies by Nadathur, S

“…In particular, they may cause a feature in the primordial power spectrum of perturbations, unlike the scale-free spectrum assumed in the standard Lambda Cold Dark Matter (LCDM) cosmological model. We then show that in the presence of such a feature, an alternative cosmological model with a large local void and no dark energy provides a good fit to both Type Ia supernovae and the cosmic microwave background (CMB) data from the WMAP satellite. …”

Cosmic CARNage I: on the calibration of galaxy formation models by Knebe, A, Pearce, FR, Gonzalez-Perez, V, Thomas, PA, Benson, A, Asquith, R, Blaizot, J, Bower, R, Carretero, J, Castander, FJ, Cattaneo, A, Cora, SA, Croton, DJ, Cui, W, Cunnama, D, Devriendt, JE, Elahi, PJ, Font, A, Fontanot, F, Gargiulo, ID, Helly, J, Henriques, B, Lee, J, Mamon, GA, Onions, J, Padilla, ND, Power, C, Pujol, A, Ruiz, AN, Srisawat, C, Stevens, ARH, Tollet, E, Vega-Martínez, CA, Yi, SK

“…We present a comparison of nine galaxy formation models, eight semi-analytical and one halo occupation distribution model, run on the same underlying cold dark matter simulation (cosmological box of co-moving width 125$h^{-1}$ Mpc, with a dark-matter particle mass of $1.24\times 10^9 h^{-1}$ Msun) and the same merger trees. …”

Galaxy merger histories and the role of merging in driving star formation at z > 1 by Kaviraj, S, Devriendt, J, Dubois, Y, Slyz, A, Welker, C, Pichon, C, Peirani, S, Borgne, D

“…Notwithstanding their central importance to the standard Λ cold dark matter paradigm, mergers are minority players in driving star formation at the epochs where the bulk of today's stellar mass was formed.…”

Galaxy Zoo: kinematics of strongly and weakly barred galaxies by Géron, T, Smethurst, RJ, Lintott, C, Kruk, S, Masters, KL, Simmons, B, Mantha, KB, Walmsley, M, Garma-Oehmichen, L, Drory, N, Lane, RR

“…Finally, we find a lower fraction of ultrafast bars than most other studies, which decreases the recently claimed tension with Lambda cold dark matter. However, the median value of R is still lower than what is predicted by simulations.…”

Testing gravitational physics on large and small scales by Traykova, D

“…However, it requires the addition of two exotic ingredients: cold dark matter and dark energy, in order to correctly account for some observational phenomena, such as the accelerated expansion of the universe and the flat galaxy rotation curves that we observe. …”

Detecting the cosmic web: Ly alpha emission from simulated filaments at z=3 by Elias, LM, Genel, S, Sternberg, A, Devriendt, J, Slyz, A, Visbal, E, Bouche, N

“…The standard cosmological model (Λ cold dark matter, ΛCDM) predicts the existence of the cosmic web: A distribution of matter into sheets and filaments connecting massive haloes. …”

Physics potential of the International Axion Observatory (IAXO) by Armengaud, E, Attie, D, Basso, S, Brun, P, Bykovskiy, N, Carmona, J, Castel, J, Cebrian, S, Cicoli, M, Civitani, M, Cogollos, C, Conlon, J, Costa, D, Dafni, T, Daido, R, Derbin, A, Descalle, M, Desch, K, Dratchnev, I, Doebrich, B, Dudarev, A, Ferrer-Ribas, E, Fleck, I, Galan, J, Galanti, G, Garrido, L, Gascon, D, Gastaldo, L, Germani, C, Ghisellini, G, Giannotti, M, Giomataris, I, Gninenko, S, Golubev, N, Graciani, R, Irastorza, I, Jakovcic, K, Kaminski, J, Krcmar, M, Krieger, C, Lakic, B, Lasserre, T, Laurent, P, Limousin, O, Lindner, A, Lomskaya, I, Lubsandorzhiev, B, Luzon, G, Marsh, M, Mergalejo, C, Mescia, F, Meyer, M, Miralda-Escude, J, Mirallas, H, Muratova, V, Navick, X, Nones, C, Notari, A, Nozik, A, Ortiz De Solorzano, A, Pantuev, V, Papaevangelou, T, Pareschi, G, Perez, K, Picatoste, E, Pivovaroff, M, Redondo, J, Ringwald, A, Roncadelli, M, Ruiz-Choliz, E, Ruz, J, Saikawa, K, Salvado, J, Samperiz, M, Schiffer, T, Schmidt, S, Schneekloth, U, Schott, M, Silva, H, Tagliaferri, G, Takahashi, F, Tavecchio, F, Ten Kate, H, Tkachev, I, Troitsky, S, Unzhakov, E, Vedrine, P, Vogel, J, Weinsheimer, C, Weltman, A, Yin, W

“…Endowed with a sensitivity to discover axion-like particles (ALPs) with a coupling to photons as small as gaγ ∼ 10−12 GeV−1 , or to electrons gae ∼10−13, IAXO has the potential to find the QCD axion in the 1 meV∼1 eV mass range where it solves the strong CP problem, can account for the cold dark matter of the Universe and be responsible for the anomalous cooling observed in a number of stellar systems. …”

Tsallis, Rényi and Sharma-Mittal Holographic Dark Energy Models in Loop Quantum Cosmology by Abdul Jawad, Kazuharu Bamba, Muhammad Younas, Saba Qummer, Shamaila Rani

“…The cosmic expansion phenomenon is being studied through the interaction of newly proposed dark energy models (Tsallis, Rényi and Sharma-Mittal holographic dark energy (HDE) models) with cold dark matter in the framework of loop quantum cosmology. …”
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High-precision search for dark photon dark matter with the Parkes Pulsar Timing Array by Xiao Xue, Zi-Qing Xia, Xingjiang Zhu, Yue Zhao, Jing Shu, Qiang Yuan, N. D. Ramesh Bhat, Andrew D. Cameron, Shi Dai, Yi Feng, Boris Goncharov, George Hobbs, Eric Howard, Richard N. Manchester, Aditya Parthasarathy, Daniel J. Reardon, Christopher J. Russell, Ryan M. Shannon, Renée Spiewak, Nithyanandan Thyagarajan, Jingbo Wang, Lei Zhang, Songbo Zhang

“…Ultralight dark matter, with m∼10^{−22} eV, is proposed to reconcile the disagreements between observations and predictions from simulations of small-scale structures in the cold dark matter paradigm while remaining consistent with other observations. …”
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Revealing the dark matter halo with axion direct detection by Foster, Joshua W., Safdi, Benjamin R., Rodd, Nicholas Llewellyn

“…Moreover, we show how potential dark matter substructure, such as cold dark matter streams or a thick dark disk, could impact the signal. …”
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Galaxy formation with BECDM – II. Cosmic filaments and first galaxies by Mocz, Philip, Fialkov, Anastasia, Vogelsberger, Mark, Becerra, Fernando, Shen, Xuejian, Robles, Victor H, Amin, Mustafa A, Zavala, Jesús, Boylan-Kolchin, Michael, Bose, Sownak, Marinacci, Federico, Chavanis, Pierre-Henri, Lancaster, Lachlan, Hernquist, Lars

“…Bose-Einstein condensate darkmatter (BECDM,also known as fuzzy darkmatter) is motivated by fundamental physics and has recently received significant attention as a serious alternative to the established cold dark matter (CDM) model. We perform cosmological simulations of BECDM gravitationally coupled to baryons and investigate structure formation at high redshifts (z ≥ 5) for a boson mass m = 2.5 ×10-22eV, exploring the dynamical effects of its wavelike nature on the cosmicweb and the formation of first galaxies.OurBECDMsimulations are directly compared toCDMaswell as to simulations where the dynamical quantum potential is ignored and only the initial suppression of the power spectrum is considered - a warm dark matter-like ('WDM') model often used as a proxy for BECDM. …”
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A rumble in the dark: signatures of self-interacting dark matter in supermassive black hole dynamics and galaxy density profiles by Di Cintio, Arianna, Tremmel, Michael, Governato, Fabio, Pontzen, Andrew, Zavala, Jesús, Bastidas Fry, Alexander, Brooks, Alyson, Vogelsberger, Mark

“…Milky Way-like galaxies form a shallower DM density profile in SIDM than they do in cold dark matter (CDM), with differences already at 20 kpc scales. …”
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Spreading out and staying sharp – creating diverse rotation curves via baryonic and self-interaction effects by Creasey, Peter, Sameie, Omid, Sales, Laura V, Yu, Hai-Bo, Vogelsberger, Mark, Zavala, Jesús

“…We use controlled N-body simulations of galaxies to study the gravitational effect of baryons in a scenario with collisionless cold dark matter (CDM) versus one with a self-interacting dark matter (SIDM) component. …”
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Galaxy formation with BECDM – I. Turbulence and relaxation of idealized haloes by Mocz, Philip, Vogelsberger, Mark, Robles, Victor H, Zavala, Jesús, Boylan-Kolchin, Michael, Fialkov, Anastasia, Hernquist, Lars

“…This type of ultralight bosonic scalar field dark matter is a viable alternative to the standard cold dark matter (CDM) paradigm, as it makes the same large-scale predictions as CDM and potentially overcomes CDM's small-scale problems via a galaxy-scale de Broglie wavelength. …”
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Mapping substructure in the HST Frontier Fields cluster lenses and in cosmological simulations by Natarajan, Priyamvada, Chadayammuri, Urmila, Jauzac, Mathilde, Richard, Johan, Kneib, Jean-Paul, Ebeling, Harald, Jiang, Fangzhou, van den Bosch, Frank, Limousin, Marceau, Jullo, Eric, Atek, Hakim, Pillepich, Annalisa, Popa, Cristina, Marinacci, Federico, Hernquist, Lars, Meneghetti, Massimo, Vogelsberger, Mark

“…Statistically resolving dark matter subhaloes down to ∼109.5 M☉, we compare the derived subhalo mass functions (SHMFs) to theoretical predictions from analytical models and with numerical simulations in a Lambda cold dark matter (LCDM) cosmology. Mimicking our observational cluster member selection criteria in the HSTFF, we report excellent agreement in both amplitude and shape of the SHMF over four decades in subhalo mass (109−13 M☉). …”
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The structure and assembly history of cluster-sized haloes in self-interacting dark matter by Brinckmann, Thejs, Zavala, Jesús, Rapetti, David, Hansen, Steen H, Vogelsberger, Mark

“…We perform dark-matter-only simulations of 28 relaxed massive cluster-sized haloes for cold dark matter (CDM) and self-interacting dark matter (SIDM) models, to study structural differences between the models at large radii, where the impact of baryonic physics is expected to be very limited. …”
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The impact of inelastic self-interacting dark matter on the dark matter structure of a Milky Way halo by Chua, Kun Ting Eddie, Dibert, Karia, Vogelsberger, Mark, Zavala, Jesús

“…Self-interacting dark matter (SIDM) is an alternative to collisionless cold dark matter (CDM) which offers a unique solution to the problems encountered with CDM on sub-galactic scales. …”
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Hierarchical phase space structure of dark matter haloes: Tidal debris, caustics, and dark matter annihilation by Afshordi, Niayesh, Mohayaee, Roya, Bertschinger, Edmund

“…With this purpose in mind, we develop a general theoretical framework to describe the hierarchical structure of the phase space of cold dark matter haloes. We do not make any assumption of spherical symmetry and/or smooth and continuous accretion. …”
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DEGREE-SCALE COSMIC MICROWAVE BACKGROUND POLARIZATION MEASUREMENTS FROM THREE YEARS OF BICEP1 DATA by Su, Meng

“…We measure the angular power spectra at 21 ≤ ℓ ≤ 335 and find that the EE spectrum is consistent with Lambda cold dark matter cosmology, with the first acoustic peak of the EE spectrum now detected at 15σ. …”
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The SWELLS survey - IV. Precision measurements of the stellar and dark matter distributions in a spiral lens galaxy by Barnabè, M, Dutton, A, Marshall, P, Auger, M, Brewer, B, Treu, T, Bolton, A, Koo, D, Koopmans, L

“…We marginalize over this parameter to infer the galaxy to have (i) a dark matter fraction within 2.2 disc radii of, independent of the galaxy stellar population, implying a maximal disc for SDSSJ2141; (ii) an apparently uncontracted dark matter halo, with concentration and virial velocity, consistent with Λ cold dark matter (ΛCDM) predictions; (iii) a slightly oblate halo, consistent with predictions from baryon-affected models. …”