Search Publications
Spatially resolving the chemical composition of the planet building blocks
Matter, A.; Lopez, B.; Pignatale, F. C.
The inner regions of protoplanetary discs (from ∼0.1 to 10 au) are the expected birthplace of planets, especially telluric. In those high-temperature regions, solids can experience cyclical annealing, vapourisation, and recondensation. Hot and warm dusty grains emit mostly in the infrared domain, notably in N-band (8-13 µm). Studying their f…
First speckle interferometric measurements of binary stars at the Observatorio Astrofísico Guillermo Haro
Guerrero, C. A.; Castillo, E.; Rosales-Ortega, F. F. +4 more
In this paper, we present the first multiband speckle interferometric measurements of binary stars performed using the 2.1 m telescope of the Observatorio Astrofísico Guillermo Haro, Cananea, Sonora, México. We describe here FICCO: Fast Imaging Camera for Cananea Observatory, a new instrument developed to perform speckle observations from the Nort…
Photometric modelling and VIS-IR albedo maps of Rhea from Cassini-VIMS
Buratti, B. J.; Clark, R. N.; Stephan, K. +6 more
Photometric correction based on the Shkuratov method is applied to derive visible and infrared albedo maps of Rhea from disc-resolved Cassini VIMS data. Differently from I/F images, albedo maps offer an optimal disentanglement of composition and physical properties of the surface from illumination-viewing effects and to study spectral variations o…
Increasing the census of ultracool dwarfs in wide binary and multiple systems using Dark Energy Survey DR1 and Gaia DR2 data
Bechtol, K.; Smith, M.; Abbott, T. M. C. +58 more
We present the discovery of 255 binary and 6 multiple system candidates with wide (> 5 arcsec) separation composed by ultracool dwarfs (UCDs) companions to stars, plus nine double ultracool dwarf systems. These systems were selected based on common distance criteria. About 90 per cent of the total sample has proper motions available and 73 per …
Periodic brightening of Kepler light curves: investigating the possibility of forward scattering due to dust clouds
Kenworthy, M.; van Kooten, M. A. M.; Doelman, N.
Dedicated transiting surveys, such as the Kepler space telescope, have provided the astronomy community with a rich data set resulting in many new discoveries. In this paper, we look at eight Kepler objects identified by Wheeler & Kipping with a periodic, broad increase in flux, that look distinctly different from intrinsic star variability. W…
The KMOS Lens-Amplified Spectroscopic Survey (KLASS): kinematics and clumpiness of low-mass galaxies at cosmic noon
Schaerer, D.; Vulcani, B.; Treu, T. +9 more
We present results from the KMOS Lens-Amplified Spectroscopic Survey (KLASS), an ESO Very Large Telescope (VLT) large program using gravitational lensing to study the spatially resolved kinematics of 44 star-forming galaxies at 0.6 < z < 2.3 with a stellar mass of 8.1 < log(M⋆/M⊙) < 11.0. These galaxies are locate…
Small-scale star formation as revealed by VVVX galactic cluster candidates
Minniti, D.; Chené, A. -N.; Alonso-García, J. +8 more
We report a search and analysis of obscured cluster candidates in the 'VISTA Variables in the Via Lactea eXtended (VVVX)' ESO Public Survey area encompassing the region between 229 ${_{.}^{\circ}}$ 4 < l < 295 ${_{.}^{\circ}}$ 2 and -4 ${_{.}^{\circ}}$ 3 < b < 4 ${_{.}^{\circ}}$ 4 of the southern Galactic disc. We discover and propose …
A catalogue of open cluster radii determined from Gaia proper motions
Alfaro, Emilio J.; Sánchez, Néstor; López-Martínez, Fátima
In this work, we improve a previously published method to calculate in a reliable way the radius of an open cluster (OC). The method is based on the behaviour of stars in the proper motion space as the sampling changes in the position space. Here, we describe the new version of the method and show its performance and robustness. Additionally, we a…
Faint Standards for ZYJHK from the UKIDSS and VISTA Surveys
Leggett, S. K.; Hambly, Nigel C.; Cross, Nicholas J. G.
The currently defined 'United Kingdom Infrared Telescope (UKIRT) Faint Standards' have JHK magnitudes between 10 and 15, with Kmedian = 11.2. These stars will be too bright for the next generation of large telescopes. We have used multi-epoch observations taken as part of the UKIRT Infrared Deep Sky Survey (UKIDSS) and the Visible and I…
Suzaku and Fermi view of the supernova remnant 3C 396
Kisaka, S.; Sezer, A.; Yamazaki, R. +4 more
3C 396 is a composite supernova remnant (SNR), consisting of a central pulsar wind nebula (PWN) and a bright shell in the west, which is known to be interacting with molecular clouds (MCs). We present a study of X-ray emission from the shell and the PWN of the SNR 3C 396 using archival Suzaku data. The spectrum of the SNR shell is clearly thermal,…