Search Publications
K2-141 b. A 5-M⊕ super-Earth transiting a K7 V star every 6.7 h
Deeg, H.; Erikson, A.; Fridlund, M. +32 more
We report on the discovery of K2-141 b (EPIC 246393474 b), an ultra-short-period super-Earth on a 6.7 h orbit transiting an active K7 V star based on data from K2 campaign 12. We confirmed the planet's existence and measured its mass with a series of follow-up observations: seeing-limited MuSCAT imaging, NESSI high-resolution speckle observations,…
Spatially resolved cold molecular outflows in ULIRGs
Rigopoulou, D.; Colina, L.; van der Werf, P. +11 more
We present new CO(2-1) observations of three low-z (d 350 Mpc) ultra-luminous infrared galaxy (ULIRG) systems (six nuclei) observed with the Atacama large millimeter/submillimeter array (ALMA) at high spatial resolution ( 500 pc). We detect massive cold molecular gas outflows in five out of six nuclei (Mout (0.3-5) × 108 M
The Local Bubble: a magnetic veil to our Galaxy
Boulanger, F.; Alves, M. I. R.; Montier, L. +1 more
The magnetic field in the local interstellar medium does not follow the large-scale Galactic magnetic field. The local magnetic field has probably been distorted by the Local Bubble, a cavity of hot ionized gas extending all around the Sun and surrounded by a shell of cold neutral gas and dust. However, so far no conclusive association between the…
Direct imaging of an ultracool substellar companion to the exoplanet host star HD 4113 A
Ségransan, D.; Delisle, J. -B.; Udry, S. +7 more
Using high-contrast imaging with the SPHERE instrument at the Very Large Telescope (VLT), we report the first images of a cold brown dwarf companion to the exoplanet host star HD 4113A. The brown dwarf HD 4113C is part of a complex dynamical system consisting of a giant planet, a stellar host, and a known wide M-dwarf companion. Its separation of …
Analysis of the SFR-M∗ plane at z < 3: single fitting versus multi-Gaussian decomposition
Koekemoer, A.; Caputi, K. I.; Bisigello, L. +1 more
The analysis of galaxies on the star formation rate-stellar mass (SFR-M∗) plane is a powerful diagnostic for galaxy evolution at different cosmic times. We consider a sample of 24 463 galaxies from the CANDELS/GOODS-S survey to conduct a detailed analysis of the SFR-M∗ relation at redshifts re than three dex in stellar mass. …
Search for Galactic runaway stars using Gaia Data Release 1 and HIPPARCOS proper motions
Lennon, D. J.; Simón-Díaz, S.; Maíz Apellániz, J. +5 more
Context. The first Gaia Data Release (DR1) significantly improved the previously available proper motions for the majority of the Tycho-2 stars.
Aims: We wish to detect runaway stars using Gaia DR1 proper motions and compare our results with previous searches.
Methods: Runaway O stars and BA supergiants were detected using a 2D proper mo…
SUPER. I. Toward an unbiased study of ionized outflows in z ∼ 2 active galactic nuclei: survey overview and sample characterization
Magnelli, B.; Rodighiero, G.; Salvato, M. +36 more
Theoretical models of galaxy formation suggest that the presence of an active galactic nucleus (AGN) is required to regulate the growth of its host galaxy through feedback mechanisms, produced by, for example, AGN-driven outflows. Although many observational studies have revealed that such outflows are common both at low and high redshift, a compr…
V1094 Scorpii: A rare giant multi-ringed disk around a T Tauri star
Maud, L. T.; Testi, L.; Tazzari, M. +11 more
Context. A wide variety of ring-like dust structures have been detected in protoplanetary disks, but their origin and frequency are still unclear.
Aims: We aim to characterize the structure of an extended, multi-ringed disk discovered serendipitously in the Atacama Large Millimeter/submillimeter Array (ALMA) Lupus disk survey and put it in th…
First Sunyaev-Zel'dovich mapping with the NIKA2 camera: Implication of cluster substructures for the pressure profile and mass estimate
Aussel, H.; Adam, R.; Arnaud, M. +37 more
The complete characterization of the pressure profile of high-redshift galaxy clusters, from their core to their outskirts, is a major issue for the study of the formation of large-scale structures. It is essential to constrain a potential redshift evolution of both the slope and scatter of the mass-observable scaling relations used in cosmology s…
Detecting the Yarkovsky effect among near-Earth asteroids from astrometric data
Carry, B.; Spoto, F.; Faggioli, L. +3 more
We present an updated set of near-Earth asteroids with a Yarkovsky-related semimajor axis drift detected from the orbital fit to the astrometry. We find 87 reliable detections after filtering for the signal-to-noise ratio of the Yarkovsky drift estimate and making sure the estimate is compatible with the physical properties of the analysed object.…