Search Publications
Modelling Kepler eclipsing binaries: homogeneous inference of orbital and stellar properties
Agol, E.; Kiefer, F.; Ali, A. +1 more
We report on the properties of eclipsing binaries (EBs) from the Kepler mission with a newly developed photometric modelling code, which uses the light curve, spectral energy distribution of each binary, and stellar evolution models to infer stellar masses without the need for radial velocity (RV) measurements. We present solutions and posteriors …
Dust emissivity and absorption cross section in DustPedia late-type galaxies
Bianchi, S.; Madden, S. C.; Galliano, F. +16 more
Aims: We compare the far-infrared to sub-millimetre dust emission properties measured in high Galactic latitude cirrus with those determined in a sample of 204 late-type DustPedia galaxies. The aim is to verify if it is appropriate to use Milky Way dust properties to derive dust masses in external galaxies.
Methods: We used Herschel obse…
A Reanalysis of the Fundamental Parameters and Age of TRAPPIST-1
Gonzales, Eileen C.; McWilliam, Andrew; Teske, Johanna +3 more
We present the distance-calibrated spectral energy distribution (SED) of TRAPPIST-1 using a new medium-resolution (R ∼ 6000) near-infrared (NIR) Folded-port InfraRed Echellette (FIRE) spectrum and its Gaia parallax. We report an updated bolometric luminosity (L bol) of -3.216 ± 0.016, along with semiempirical fundamental parameters: eff…
Precision Distances to Dwarf Galaxies and Globular Clusters from Pan-STARRS1 3π RR Lyrae
Rix, Hans-Walter; Magnier, Eugene; Kudritzki, Rolf-Peter +6 more
We present new spatial models and distance estimates for globular clusters and dwarf spheroidals orbiting our Galaxy based on RR Lyrae (RRab) stars in the Pan-STARRS1 (PS1) 3π survey. Using the PS1 sample of RRab stars from Sesar et al. in 16 globular clusters and 5 dwarf galaxies, we fit structural models in (l, b, D) space; for 13 globular clust…
Survey of Saturn's Magnetopause and Bow Shock Positions Over the Entire Cassini Mission: Boundary Statistical Properties and Exploration of Associated Upstream Conditions
Dougherty, M. K.; Thomsen, M. F.; Jackman, C. M.
The Cassini spacecraft orbited the planet Saturn from July 2004 to September 2017, and its varied orbital trajectory took it across the magnetopause and bow shock boundaries multiple times, at varying radial distances, local times, latitudes, and phases of the solar cycle. Here we present a comprehensive list of these boundary crossings, derived p…
Astrochemistry as a Tool To Follow Protostellar Evolution: The Class I Stage
Bianchi, Eleonora; Ceccarelli, Cecilia; Codella, Claudio +3 more
The latest developments in astrochemistry have shown how some molecular species can be used as a tool to study the early stages of the solar-type star formation process. Among them, the more relevant species are the interstellar complex organic molecules (iCOMs) and the deuterated molecules. Their analysis give us information on the present and pa…
The WAGGS project - II. The reliability of the calcium triplet as a metallicity indicator in integrated stellar light
Kamann, Sebastian; Schiavon, Ricardo P.; Foster, Caroline +12 more
Using data from the WiFeS Atlas of Galactic Globular cluster Spectra, we study the behaviour of the calcium triplet (CaT), a popular metallicity indicator in extragalactic stellar population studies. A major caveat of these studies is that the potential sensitivity to other stellar population parameters such as age, calcium abundance, and the init…
New β Cep pulsators discovered with K2 space photometry
Aerts, C.; Bowman, D. M.; Burssens, S. +3 more
We present the discovery of three new β Cep pulsators, three new pulsators with frequency groupings, and frequency patterns in a B3Ib star, all of which show pulsations with frequencies as high as about 17 d-1, with K2 space mission photometry. Based on a Fourier analysis and iterative pre-whitening, we present a classification and eval…
In-flight Characterization and Calibration of the Juno-ultraviolet Spectrograph (Juno-UVS)
Gérard, Jean-Claude; Kammer, Joshua A.; Gladstone, G. Randall +9 more
Juno is the first polar orbiter around Jupiter. Juno possesses a suite of instruments designed to measure the electron and ion populations in the Jupiter magnetosphere, leading to the powerful Jovian aurorae. The Ultraviolet Spectrograph onboard Juno (Juno-UVS) is a photon-counting imaging spectrograph (68-210 nm), designed to observe and characte…
A treatment procedure for GMOS/IFU data cubes: application to NGC 2835
Ricci, T. V.; Ferrari, Fabricio; Steiner, J. E. +3 more
We present a set of treatment techniques for GMOS/IFU data cubes, including correction of the differential atmospheric refraction; Butterworth spatial filtering, to remove high spatial-frequency noise; instrumental fingerprint removal; Richardson-Lucy deconvolution, to improve the spatial resolution of the observations. A comparison with HST image…