Search Publications
The eccentricity distribution of wide binaries and their individual measurements
Ting, Yuan-Sen; Zakamska, Nadia L.; Hwang, Hsiang-Chih
Eccentricity of wide binaries is difficult to measure due to their long orbital periods. With Gaia's high-precision astrometric measurements, eccentricity of a wide binary can be constrained by the angle between the separation vector and the relative velocity vector (the v-r angle). In this paper, by using the v-r angles of wide binaries in Gaia E…
Analysis of Early Science observations with the CHaracterising ExOPlanets Satellite (CHEOPS) using PYCHEOPS
Guterman, P.; Alonso, R.; Deleuil, M. +77 more
CHEOPS (CHaracterising ExOPlanet Satellite) is an ESA S-class mission that observes bright stars at high cadence from low-Earth orbit. The main aim of the mission is to characterize exoplanets that transit nearby stars using ultrahigh precision photometry. Here, we report the analysis of transits observed by CHEOPS during its Early Science observi…
The chemo-dynamical groups of Galactic globular clusters
Grand, Robert J. J.; Marinacci, Federico; Deason, Alis J. +3 more
We introduce a multicomponent chemo-dynamical method for splitting the Galactic population of globular clusters (GCs) into three distinct constituents: bulge, disc, and stellar halo. The latter is further decomposed into the individual large accretion events that built up the Galactic stellar halo: the Gaia-Enceladus-Sausage, Kraken and Sequoia st…
Dual constraints with ALMA: new [O III] 88-µm and dust-continuum observations reveal the ISM conditions of luminous LBGs at z 7
Carniani, Stefano; Maiolino, Roberto; Jones, Gareth C. +10 more
We present new [${\rm O\, {\small III}}$] 88-$\mu \mathrm{{m}}$ observations of five bright z ~ 7 Lyman-break galaxies spectroscopically confirmed by ALMA through [${\rm C\, {\small II}}$] 158 $\mu \mathrm{{m}}$, unlike recent [${\rm O\, {\small III}}$] detections where Lyman α was used. This nearly doubles the sample of Epoch of Reionization gala…
The star formation burstiness and ionizing efficiency of low-mass galaxies
Contini, Thierry; van Dokkum, Pieter; Reddy, Naveen +5 more
We investigate the burstiness of star formation and the ionizing efficiency of a large sample of galaxies at 0.7 < z < 1.5 using HST grism spectroscopy and deep ultraviolet (UV) imaging in the GOODS-N and GOODS-S fields. The star formation history (SFH) in these strong emission-line low-mass galaxies indicates an elevated star formation rate…
Dark Energy Survey Year 3 results: galaxy clustering and systematics treatment for lens galaxy samples
Bacon, D.; Bechtol, K.; Smith, M. +103 more
In this work, we present the galaxy clustering measurements of the two DES lens galaxy samples: a magnitude-limited sample optimized for the measurement of cosmological parameters, MAGLIM, and a sample of luminous red galaxies selected with the REDMAGIC algorithm. MAGLIM/REDMAGIC sample contains over 10 million/2.5 million galaxies and is divided …
Measuring the Milky Way mass distribution in the presence of the LMC
Vasiliev, Eugene; Correa Magnus, Lilia
The ongoing interaction between the Milky Way (MW) and its largest satellite - the Large Magellanic Cloud (LMC) - creates a significant perturbation in the distribution and kinematics of distant halo stars, globular clusters and satellite galaxies, and leads to biases in MW mass estimates from these tracer populations. We present a method for comp…
Continuum reverberation mapping and a new lag-luminosity relationship for AGN
Netzer, Hagai
High cadence, high quality observations of active galactic nuclei (AGN) clearly show continuum variations with lags, relative to the shortest observed variable UV continuum that increase with wavelength ('lag spectra'). These have been attributed to the irradiation and heating of the central accretion disc by the central X-ray emitting corona. An …
Inferring the intergalactic medium neutral fraction at z 6-8 with low-luminosity Lyman break galaxies
Pentericci, Laura; Treu, Tommaso; Bradač, Maruša +6 more
We present a Bayesian inference on the neutral hydrogen fraction of the intergalactic medium (IGM), $\overline{x}_{\small HI}$, at z ~ 6-8 using the properties of Lyman break galaxies (LBGs) during the epoch of reionization. We use large samples of LBG candidates at 5.5 ≤ z ≤ 8.2 with spectroscopy from Keck/DEIMOS and Keck/MOSFIRE. For each galaxy…
Dust, CO, and [C I]: cross-calibration of molecular gas mass tracers in metal-rich galaxies across cosmic time
Ivison, R. J.; Dunne, L.; Gomez, H. L. +2 more
We present a self-consistent cross-calibration of the three main molecular gas mass tracers in galaxies, namely the 12CO(1-0), [C I](3P1-3P0) lines, and the submm dust continuum emission, using a sample of 407 galaxies, ranging from local discs to submillimetre-selected galaxies (SMGs) up to z…