Search Publications
Accurate distances to Galactic globular clusters through a combination of Gaia EDR3, HST, and literature data
Baumgardt, H.; Vasiliev, E.
We have derived accurate distances to Galactic globular clusters by combining data from the Gaia Early Data Release 3 (EDR3) with distances based on Hubble Space Telescope (HST) data and literature-based distances. We determine distances either directly from the Gaia EDR3 parallaxes, or kinematically by combining line-of-sight velocity dispersion …
Distances to PHANGS galaxies: New tip of the red giant branch measurements and adopted distances
Van Dyk, Schuyler D.; Kruijssen, J. M. Diederik; Leroy, Adam K. +29 more
PHANGS-HST is an ultraviolet-optical imaging survey of 38 spiral galaxies within ~20 Mpc. Combined with the PHANGS-ALMA, PHANGS-MUSE surveys and other multiwavelength data, the data set will provide an unprecedented look into the connections between young stars, H II regions, and cold molecular gas in these nearby star-forming galaxies. Accurate d…
The [O III]+H β equivalent width distribution at z ≃ 7: implications for the contribution of galaxies to reionization
Charlot, Stéphane; Chevallard, Jacopo; Stark, Daniel P. +1 more
We quantify the distribution of [O III]+H β line strengths at z ≃ 7 using a sample of 20 bright ( $\mathrm{M}_{\mathrm{UV}}^{}$ ≲ -21) galaxies. We select these systems over wide-area fields (2.3 deg2 total) using a new colour-selection that precisely selects galaxies at z ≃ 6.63-6.83, a redshift range where blue Spitzer/IRAC [3.6]-[4.5…
VINTERGATAN - I. The origins of chemically, kinematically, and structurally distinct discs in a simulated Milky Way-mass galaxy
Feuillet, Diane K.; Feltzing, Sofia; Ryde, Nils +6 more
Spectroscopic surveys of the Milky Way's stars have revealed spatial, chemical, and kinematical structures that encode its history. In this work, we study their origins using a cosmological zoom simulation, VINTERGATAN, of a Milky Way-mass disc galaxy. We find that in connection to the last major merger at z ∼ 1.5, cosmological accretion leads to …
Quenched fractions in the IllustrisTNG simulations: comparison with observations and other theoretical models
Vogelsberger, Mark; Pillepich, Annalisa; Nelson, Dylan +3 more
We make an in-depth comparison of the IllustrisTNG cosmological simulations with observed quenched fractions of central and satellite galaxies, for Mstars = 109-12 M⊙ at 0 ≤ z ≤ 3. We show how measurement choices [aperture, quenched definition, and star formation rate (SFR) indicator time-scale], as well as sample …
Lyman continuum leakage from low-mass galaxies with M⋆ < 108 M⊙
Chisholm, J.; Schaerer, D.; Thuan, T. X. +5 more
We present observations with the Cosmic Origins Spectrograph onboard the Hubble Space Telescope of nine low-mass star-forming galaxies at redshifts, z, in the range 0.3179-0.4524, with stellar masses $M_\star \, \lt $ 108 M⊙ and very high specific star-formation rates sSFR ~150-630 Gyr-1, aiming to study the depend…
Dark matter haloes of massive elliptical galaxies at z ∼ 0.2 are well described by the Navarro-Frenk-White profile
Treu, Tommaso; Sonnenfeld, Alessandro; Birrer, Simon +1 more
We investigate the internal structure of elliptical galaxies at z ~ 0.2 from a joint lensing-dynamics analysis. We model Hubble Space Telescope images of a sample of 23 galaxy-galaxy lenses selected from the Sloan Lens ACS (SLACS) survey. Whereas the original SLACS analysis estimated the logarithmic slopes by combining the kinematics with the imag…
The cloudy shape of hot Jupiter thermal phase curves
Fortney, Jonathan J.; Showman, Adam P.; Parmentier, Vivien
Hot Jupiters have been predicted to have a strong day/night temperature contrast and a hotspot shifted eastward of the substellar point. This was confirmed by numerous phase curve observations probing the longitudinal brightness variation of the atmosphere. Global circulation models, however, systematically underestimate the phase curve amplitude …
Joint constraints on thermal relic dark matter from strong gravitational lensing, the Ly α forest, and Milky Way satellites
Viel, Matteo; Fassnacht, Christopher D.; Koopmans, Léon V. E. +10 more
We derive joint constraints on the warm dark matter (WDM) half-mode scale by combining the analyses of a selection of astrophysical probes: strong gravitational lensing with extended sources, the Ly α forest, and the number of luminous satellites in the Milky Way. We derive an upper limit of λhm = 0.089 Mpc h-1 at the 95 per …
An observational determination of the evolving extragalactic background light from the multiwavelength HST/CANDELS survey in the Fermi and CTA era
Pérez-González, Pablo G.; Saldana-Lopez, Alberto; Primack, Joel R. +5 more
The diffuse extragalactic background light (EBL) is formed by ultraviolet (UV), optical, and infrared (IR) photons mainly produced by star formation processes over the history of the Universe and contains essential information about galaxy evolution and cosmology. Here, we present a new determination of the evolving EBL spectral energy distributio…