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Distances to Galactic X-ray binaries with Gaia DR2
Barmby, P.; Bahramian, A.; Arnason, R. M. +2 more
Precise and accurate measurements of distances to Galactic X-ray binaries (XRBs) reduce uncertainties in the determination of XRB physical parameters. We have cross-matched the XRB catalogues of Liu, van Paradijs & van den Heuvel to the results of Gaia Data Release 2. We identify 86 XRBs with a Gaia candidate counterpart, of which 32 are low-m…
1D atmospheric study of the temperate sub-Neptune K2-18b
Bézard, B.; Charnay, B.; Blain, D.
Context. The atmospheric composition of exoplanets with masses between 2 and 10 M⊕ is poorly understood. In that regard, the sub-Neptune K2-18b, which is subject to Earth-like stellar irradiation, offers a valuable opportunity for the characterisation of such atmospheres. Previous analyses of its transmission spectrum from the Kepler, H…
How to Identify Exoplanet Surfaces Using Atmospheric Trace Species in Hydrogen-dominated Atmospheres
Fortney, Jonathan J.; Moses, Julianne I.; Zhang, Xi +1 more
Sub-Neptunes (Rp ~ 1.25-4 REarth) remain the most commonly detected exoplanets to date. However, it remains difficult for observations to tell whether these intermediate-sized exoplanets have surfaces and where their surfaces are located. Here we propose that the abundances of trace species in the visible atmospheres of these…
The all-sky PLATO input catalogue
Heras, A. M.; Deleuil, M.; Rauer, H. +29 more
Context. The ESA PLAnetary Transits and Oscillations of stars (PLATO) mission will search for terrestrial planets in the habitable zone of solar-type stars. Because of telemetry limitations, PLATO targets need to be pre-selected.
Aims: In this paper, we present an all sky catalogue that will be fundamental to selecting the best PLATO fields a…
L-GALAXIES 2020: The evolution of radial metallicity profiles and global metallicities in disc galaxies
White, Simon D. M.; Yates, Robert M.; Henriques, Bruno M. B. +5 more
We present a modified version of the L-GALAXIES2020 semi-analytic model of galaxy evolution, which includes significantly increased direct metal enrichment of the circumgalactic medium (CGM) by supernovae (SNe). These more metal-rich outflows do not require increased mass-loading factors, in contrast to some other galaxy evolution models. This mod…
ALMA Measures Rapidly Depleted Molecular Gas Reservoirs in Massive Quiescent Galaxies at z ∼ 1.5
Bezanson, Rachel; Brammer, Gabriel; Weiner, Benjamin +6 more
We present Atacama Large Millimeter/submillimeter Array (ALMA) CO(2-1) spectroscopy of six massive (log10 ${M}_{* }$ / ${M}_{\odot }$ > 11.3) quiescent galaxies at z ∼ 1.5. These data represent the largest sample using CO emission to trace molecular gas in quiescent galaxies above z > 1, achieving an average 3σ sensitivity of ${M}…
Turbulence in space plasmas: Who needs it?
Matthaeus, W. H.
The complex nonlinear dynamical phenomenon described as turbulence, is known to have a great impact on fluids, magnetohydrodynamic systems, and on plasmas. This paper reviews selected topics on turbulence in these systems, emphasizing the multiscale space-time properties of the turbulence cascade as it transfers energy from large scale reservoirs,…
pyUPMASK: an improved unsupervised clustering algorithm
Moitinho, A.; Perren, G. I.; Pera, M. S. +2 more
Aims: We present pyUPMASK, an unsupervised clustering method for stellar clusters that builds upon the original UPMASK package. The general approach of this method makes it plausible to be applied to analyses that deal with binary classes of any kind as long as the fundamental hypotheses are met. The code is written entirely in Python and is …
Photometric Dissection of Intracluster Light and Its Correlations with Host Cluster Properties
Schmidt, M.; Bender, R.; Riffeser, A. +4 more
We explore several ways to dissect brightest cluster galaxies (BCGs) and their surrounding intracluster light (ICL) using a surface brightness (SB) cut, a luminosity cut, excess light above a de Vaucouleurs profile, or a double Sérsic decomposition. Assuming that all light above $M\lt -21.85\,g^{\prime} \ \mathrm{mag}$ is attributable to the ICL, …
TESS Hunt for Young and Maturing Exoplanets (THYME). V. A Sub-Neptune Transiting a Young Star in a Newly Discovered 250 Myr Association
Vanderburg, Andrew; Latham, David W.; Quinn, Samuel N. +27 more
The detection and characterization of young planetary systems offer a direct path to study the processes that shape planet evolution. We report on the discovery of a sub-Neptune-sized planet orbiting the young star HD 110082 (TOI-1098). Transit events we initially detected during TESS Cycle 1 are validated with time-series photometry from Spitzer.…