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Consensus report on 25 yr of searches for damped Ly α galaxies in emission: confirming their metallicity-luminosity relation at z ≳ 2
Fynbo, J. P. U.; Møller, P.; Krogager, J. -K. +1 more
Starting from a summary of detection statistics of our recent X-shooter campaign, we review the major surveys, both space and ground based, for emission counterparts of high-redshift damped Ly α absorbers (DLAs) carried out since the first detection 25 yr ago. We show that the detection rates of all surveys are precisely reproduced by a simple mod…
Are High-redshift Galaxies Hot? Temperature of z > 5 Galaxies and Implications for Their Dust Properties
Kartaltepe, Jeyhan S.; Faisst, Andreas L.; Riechers, Dominik A. +6 more
Recent studies have found a significant evolution and scatter in the relationship between the UV spectral slope (β UV) and the infrared excess (IRX; L IR/L UV) at z > 4, suggesting different dust properties of these galaxies. The total far-infrared (FIR) luminosity is key for this analysis, but it is poorly cons…
A Framework to Combine Low- and High-resolution Spectroscopy for the Atmospheres of Transiting Exoplanets
Brogi, M.; Désert, J. -M.; Bean, J. +2 more
Current observations of the atmospheres of close-in exoplanets are predominantly obtained with two techniques: low-resolution spectroscopy with space telescopes and high-resolution spectroscopy from the ground. Although the observables delivered by the two methods are in principle highly complementary, no attempt has ever been made to combine them…
Tracing Interstellar Magnetic Field Using Velocity Gradient Technique: Application to Atomic Hydrogen Data
Yuen, Ka Ho; Lazarian, A.
The advancement of our understanding of MHD turbulence opens ways to develop new techniques to probe magnetic fields. In MHD turbulence, the velocity gradients are expected to be perpendicular to magnetic fields and this fact was used by González-Casanova & Lazarian to introduce a new technique to trace magnetic fields using velocity centroid …
Gaia Data Release 1. Catalogue validation
Jordi, C.; Luri, X.; Cantat-Gaudin, T. +42 more
Context. Before the publication of the Gaia Catalogue, the contents of the first data release have undergone multiple dedicated validation tests.
Aims: These tests aim to provide in-depth analysis of the Catalogue content in order to detect anomalies and individual problems in specific objects or in overall statistical properties, and either …
On the Existence of the Kolmogorov Inertial Range in the Terrestrial Magnetosheath Turbulence
Sahraoui, F.; Deng, X. H.; Huang, S. Y. +2 more
In the solar wind, power spectral density (PSD) of the magnetic field fluctuations generally follow the so-called Kolmogorov spectrum f -5/3 in the inertial range, where the dynamics is thought to be dominated by nonlinear interactions between counter-propagating incompressible Alfvén wave parquets. These features are thought to be ubiq…
Dust Density Distribution and Imaging Analysis of Different Ice Lines in Protoplanetary Disks
Pinilla, P.; Pohl, A.; Birnstiel, T. +1 more
Recent high angular resolution observations of protoplanetary disks at different wavelengths have revealed several kinds of structures, including multiple bright and dark rings. Embedded planets are the most used explanation for such structures, but there are alternative models capable of shaping the dust in rings as it has been observed. We assum…
The Sloan Lens ACS Survey. XIII. Discovery of 40 New Galaxy-scale Strong Lenses
Treu, Tommaso; Brownstein, Joel R.; Gavazzi, Raphaël +8 more
We present the full sample of 118 galaxy-scale strong-lens candidates in the Sloan Lens ACS (SLACS) Survey for the Masses (S4TM) Survey, which are spectroscopically selected from the final data release of the Sloan Digital Sky Survey. Follow-up Hubble Space Telescope (HST) imaging observations confirm that 40 candidates are definite strong lenses …
Strong XUV irradiation of the Earth-sized exoplanets orbiting the ultracool dwarf TRAPPIST-1
Wheatley, Peter J.; Gillon, Michaël; Louden, Tom +2 more
We present an XMM-Newton X-ray observation of TRAPPIST-1, which is an ultracool dwarf star recently discovered to host three transiting and temperate Earth-sized planets. We find the star is a relatively strong and variable coronal X-ray source with an X-ray luminosity similar to that of the quiet Sun, despite its much lower bolometric luminosity.…
The Canada-France Imaging Survey: First Results from the u-Band Component
Sawicki, Marcin; Mellier, Yannick; Robin, Annie C. +41 more
The Canada-France Imaging Survey (CFIS) will map the northern high Galactic latitude sky in the u-band ("CFIS-u," 10,000 °2) and in the r-band ("CFIS-r," 5000 °2), enabling a host of stand-alone science investigations, and providing some of the ground-based data necessary for photometric redshift determination for the Euclid …