Search Publications
UV-extended E-MILES stellar population models: young components in massive early-type galaxies
Koleva, M.; Falcón-Barroso, J.; Ricciardelli, E. +2 more
We present UV-extended E-MILES stellar population synthesis models covering the spectral range λλ 1680-50 000 Å at moderately high resolution. We employ the NGSL space-based stellar library to compute spectra of single-age, single-metallicity stellar populations in the wavelength range from 1680 to 3540 Å. These models represent a significant impr…
Modelling and interpreting spectral energy distributions of galaxies with BEAGLE
Charlot, Stéphane; Chevallard, Jacopo
We present a new-generation tool to model and interpret spectral energy distributions (SEDs) of galaxies, which incorporates in a consistent way the production of radiation and its transfer through the interstellar and intergalactic media. This flexible tool, named BEAGLE (for BayEsian Analysis of GaLaxy sEds), allows one to build mock galaxy cata…
Detection of high Lyman continuum leakage from four low-redshift compact star-forming galaxies
Schaerer, D.; Thuan, T. X.; Izotov, Y. I. +4 more
Following our first detection reported in Izotov et al., we present the detection of Lyman continuum (LyC) radiation of four other compact star-forming galaxies observed with the Cosmic Origins Spectrograph (COS) onboard the Hubble Space Telescope. These galaxies, at redshifts of z ∼ 0.3, are characterized by high emission-line flux ratios [O III]…
The DRAGON simulations: globular cluster evolution with a million stars
Wang, Long; Berczik, Peter; Naab, Thorsten +6 more
Introducing the DRAGON simulation project, we present direct N-body simulations of four massive globular clusters (GCs) with 106 stars and 5 per cent primordial binaries at a high level of accuracy and realism. The GC evolution is computed with NBODY6++GPU and follows the dynamical and stellar evolution of individual stars and binaries,…
The z = 9-10 galaxy population in the Hubble Frontier Fields and CLASH surveys: the z = 9 luminosity function and further evidence for a smooth decline in ultraviolet luminosity density at z≥ 8
McLure, R. J.; Dunlop, J. S.; McLeod, D. J.
We present the results of a search for z = 9-10 galaxies within the first eight pointings of the Hubble Frontier Fields (HFF) survey and 20 cluster fields from the Cluster Lensing And Supernova survey with Hubble (CLASH) survey. Combined with our previous analysis of the Hubble Ultra Deep Field, we have now completed a search for z = 9-10 galaxies…
The Hα surface brightness-radius relation: a robust statistical distance indicator for planetary nebulae
Frew, David J.; Parker, Q. A.; Bojičić, I. S.
Measuring the distances to Galactic planetary nebulae (PNe) has been an intractable problem for many decades. We have now established a robust optical statistical distance indicator, the Hα surface brightness-radius or SHα-r relation, which addresses this problem. We developed this relation from a critically evaluated sample of primary …
The R136 star cluster dissected with Hubble Space Telescope/STIS. I. Far-ultraviolet spectroscopic census and the origin of He II λ1640 in young star clusters
Howarth, I. D.; Angus, C. R.; Lennon, D. J. +17 more
We introduce a Hubble Space Telescope (HST)/Space Telescope Imaging Spectrograph (STIS) stellar census of R136a, the central ionizing star cluster of 30 Doradus. We present low resolution far-ultraviolet STIS spectroscopy of R136 using 17 contiguous 52 arcsec × 0.2 arcsec slits which together provide complete coverage of the central 0.85 parsec (3…
Bimodality of low-redshift circumgalactic O VI in non-equilibrium EAGLE zoom simulations
Tumlinson, Jason; Crain, Robert A.; Schaye, Joop +7 more
We introduce a series of 20 cosmological hydrodynamical simulations of L* (M200 = 1011.7-1012.3 M⊙) and group-sized (M200 = 1012.7-1013.3 M⊙) haloes run with the model used for the EAGLE project, which additionally includes a non-equilibrium ionization and cool…
Masses and scaling relations for nuclear star clusters, and their co-existence with central black holes
Lützgendorf, Nora; Böker, Torsten; Neumayer, Nadine +2 more
Galactic nuclei typically host either a Nuclear Star Cluster (NSC, prevalent in galaxies with masses $\lesssim 10^{10}M_\odot$) or a Massive Black Hole (MBH, common in galaxies with masses $\gtrsim 10^{12}M_\odot$). In the intermediate mass range, some nuclei host both a NSC and a MBH. In this paper, we explore scaling relations between NSC mass (…
The central parsecs of M87: jet emission and an elusive accretion disc
Espada, D.; Prieto, M. A.; González-Martín, O. +2 more
We present the first simultaneous spectral energy distribution (SED) of M87 core at a scale of 0.4 arcsec ( ∼ 32 pc) across the electromagnetic spectrum. Two separate, quiescent, and active states are sampled that are characterized by a similar featureless SED of power-law form, and that are thus remarkably different from that of a canonical activ…