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Fletta eftir efnisorði "Vetrarbrautir"

Fletta eftir efnisorði "Vetrarbrautir"

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    The 2175 Å Extinction Feature in the Optical Afterglow Spectrum of GRB 180325A at z = 2.25 
    Zafar, T.; Elm Heintz, Kasper; Fynbo, J. P. U.; Malesani, D.; Bolmer, J.; Ledoux, C.; Arabsalmani, M.; Kaper, L.; Campana, S.; Starling, R. L. C.; Selsing, J.; Kann, D. A.; Postigo, A. de Ugarte; Schweyer, T.; Christensen, L.; Møller, P.; Japelj, J.; Perley, D.; Tanvir, N. R.; D’Avanzo, P.; Hartmann, D. H.; Hjorth, J.; Covino, S.; Sbarufatti, B.; Jakobsson, P.; Izzo, L.; Salvaterra, R.; D’Elia, V.; Xu, D. (American Astronomical Society, 2018-06-18)
    The ultraviolet (UV) extinction feature at 2175 Å is ubiquitously observed in the Galaxy but is rarely detected at high redshifts. Here we report the spectroscopic detection of the 2175 Å bump on the sightline to the γ-ray burst (GRB) afterglow GRB ...
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    The Environment of the Binary Neutron Star Merger GW170817 
    Levan, A. J.; Lyman, J. D.; Tanvir, N. R.; Hjorth, J.; Mandel, I.; Stanway, E. R.; Steeghs, D.; Fruchter, A. S.; Troja, E.; Schrøder, S. L.; Wiersema, K.; Bruun, S. H.; Cano, Zach; Cenko, S. B.; Postigo, A. de Ugarte; Evans, P.; Fairhurst, S.; Fox, O. D.; Fynbo, J. P. U.; Gompertz, B.; Greiner, J.; Im, M.; Izzo, L.; Jakobsson, Pall; Kangas, T.; Khandrika, H. G.; Lien, A. Y.; Malesani, D.; O’Brien, P.; Osborne, J. P.; Palazzi, E.; Pian, E.; Perley, D. A.; Rosswog, S.; Ryan, R. E.; Schulze, S.; Sutton, P.; Thöne, C. C.; Watson, D. J.; Wijers, R. A. M. J. (American Astronomical Society, 2017-10-16)
    We present Hubble Space Telescope (HST) and Chandra imaging, combined with Very Large Telescope MUSE integral field spectroscopy of the counterpart and host galaxy of the first binary neutron star merger detected via gravitational-wave emission by LIGO ...
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    ETHOS – an effective theory of structure formation: predictions for the high-redshift Universe – abundance of galaxies and reionization 
    Lovell, Mark; Zavala Franco, Jesus; Vogelsberger, Mark; Shen, Xuejian; Cyr-Racine, Francis-Yan; Pfrommer, Christoph; Sigurdson, Kris; Boylan-Kolchin, Michael; Pillepich, Annalisa (Oxford University Press (OUP), 2018-03-28)
    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-scale ...
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    The fraction of dark matter within galaxies from the IllustrisTNG simulations 
    Lovell, Mark; Pillepich, Annalisa; Genel, Shy; Nelson, Dylan; Springel, Volker; Pakmor, Rüdiger; Marinacci, Federico; Weinberger, Rainer; Torrey, Paul; Vogelsberger, Mark; Alabi, Adebusola; Hernquist, Lars (Oxford University Press (OUP), 2018-08-25)
    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 ...
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    Galaxies through cosmic time illuminated by gamma-ray bursts and quasars 
    Elm Heintz, Kasper (University of Iceland, School of Engineering and Natural Sciences, Faculty of Physical Sciences, 2019-07)
    In the early Universe, most of the cold neutral gas that will later form into individual stars and galaxies is practically invisible to us. These neutral gas reservoirs can, however, be illuminated by bright cosmic lightsources such as gamma-ray bursts ...
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    Lyman continuum leakage in faint star-forming galaxies at redshift z = 3−3.5 probed by gamma-ray bursts 
    Vielfaure, J.-B.; Vergani, S. D.; Japelj, J.; Fynbo, J. P. U.; Gronke, M.; Elm Heintz, Kasper; Malesani, D. B.; Petitjean, P.; Tanvir, N. R.; D’Elia, V.; Kann, D. A.; Palmerio, J. T.; Salvaterra, R.; Wiersema, K.; Arabsalmani, M.; Campana, S.; Covino, S.; De Pasquale, M.; de Ugarte Postigo, A.; Hammer, F.; Hartmann, D. H.; Jakobsson, Pall; Kouveliotou, C.; Laskar, T.; Levan, A. J.; Rossi, A. (EDP Sciences, 2020-09)
    Context. The identification of the sources that reionized the Universe and their specific contribution to this process are key missing pieces of our knowledge of the early Universe. Faint star-forming galaxies may be the main contributors to the ionizing ...
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    The structure and assembly history of cluster-sized haloes in self-interacting dark matter 
    Brinckmann, Thejs; Zavala Franco, Jesus; Rapetti, David; Hansen, Steen H.; Vogelsberger, Mark (Oxford University Press (OUP), 2017-10-30)
    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 ...
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    X-ray background and its correlation with the 21 cm signal 
    Ma, Q; Ciardi, B; Eide, M B; Helgason, Kári (Oxford University Press (OUP), 2018-07-09)
    We use high-resolution hydrodynamical simulations to study the contribution to the X-ray background from high-z energetic sources, such as X-ray binaries, accreting nuclear black holes, and shock heated interstellar medium. Adopting the model discussed ...
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    X-shooting GRBs at high redshift: probing dust production history 
    Zafar, T; Møller, P; Watson, D; Lattanzio, J; Hopkins, A M; Karakas, A; Fynbo, J P U; Tanvir, N R; Selsing, J; Jakobsson, Pall; Heintz, K E; Kann, D A; Groves, B; Kulkarni, V; Covino, S; D’Elia, V; Japelj, J; Corre, D; Vergani, S (Oxford University Press (OUP), 2018-07-19)
    Evolved asymptotic giant branch (AGB) stars and Type  Ia supernovae (SNe) are important contributors to the elements that form dust in the interstellar medium of galaxies, in particular, carbon and iron. However, they require at least a Gyr to start ...