Search Publications
"TNOs are Cool": A survey of the trans-Neptunian region. XI. A Herschel-PACS view of 16 Centaurs
Fornasier, S.; Lellouch, E.; Kiss, C. +13 more
Context. Centaurs are the transitional population between trans-Neptunian objects (TNOs) and Jupiter-family comets. Their physical properties provide an insight into TNO properties, but only under restricted conditions since Centaurs are closer to the Sun and Earth. For this reason it is possible to access the smaller ones, which is more difficult…
An independent determination of Fomalhaut b's orbit and the dynamical effects on the outer dust belt
Augereau, J. -C.; Ertel, S.; Lebreton, J. +7 more
Context. The nearby star Fomalhaut harbors a cold, moderately eccentric (e ~ 0.1) dust belt with a sharp inner edge near 133 au. A low-mass, common proper motion companion, Fomalhaut b (Fom b), was discovered near the inner edge and was identified as a planet candidate that could account for the belt morphology. However, the most recent orbit dete…
Water in star-forming regions with Herschel (WISH). V. The physical conditions in low-mass protostellar outflows revealed by multi-transition water observations
Liseau, R.; van Dishoeck, E. F.; Bergin, E. A. +17 more
Context. Outflows are an important part of the star formation process as both the result of ongoing active accretion and one of the main sources of mechanical feedback on small scales. Water is the ideal tracer of these effects because it is present in high abundance for the conditions expected in various parts of the protostar, particularly the o…
Planck 2013 results. IV. Low Frequency Instrument beams and window functions
Bernard, J. -P.; Planck Collaboration; Aghanim, N. +207 more
This paper presents the characterization of the in-flight beams, the beam window functions, and the associated uncertainties for the Planck Low Frequency Instrument (LFI). Knowledge of the beam profiles is necessary for determining the transfer function to go from the observed to the actual sky anisotropy power spectrum. The main beam distortions …
A study of rotating globular clusters. The case of the old, metal-poor globular cluster NGC 4372
Koch, A.; Kacharov, N.; Zijlstra, A. A. +7 more
Context. NGC 4372 is a poorly studied old, very metal-poor globular cluster (GC) located in the inner Milky Way halo.
Aims: We present the first in-depth study of the kinematic properties and derive the structural parameters of NGC 4372 based on the fit of a Plummer profile and a rotating, physical model. We explore the link between internal …
Hiccup accretion in the swinging pulsar IGR J18245-2452
Campana, S.; Stella, L.; Rea, N. +7 more
The source IGR J18245-2452 is the fifteenth discovered accreting millisecond X-ray pulsar and the first neutron star to show direct evidence of a transition between accretion- and rotation-powered emission states. These swings provided the strongest confirmation to date of the pulsar recycling scenario. During the two XMM-Newton observations that …
Discovering extremely compact and metal-poor, star-forming dwarf galaxies out to z ~ 0.9 in the VIMOS Ultra-Deep Survey
Maccagni, D.; Cimatti, A.; Ilbert, O. +42 more
We report the discovery of 31 low-luminosity (-14.5 ≳ MAB(B) ≳ -18.8), extreme emission line galaxies (EELGs) at 0.2 ≲ z ≲ 0.9 identified by their unusually high rest-frame equivalent widths (100 ≤ EW[O iii] ≤ 1700 Å) as part of the VIMOS Ultra Deep Survey (VUDS). VIMOS optical spectra of unprecedented sensitivity (IAB ~ 25 m…
Characterization of the gaseous companion κ Andromedae b. New Keck and LBTI high-contrast observations
Kuzuhara, M.; Tamura, M.; Ishii, M. +67 more
Context. We previously reported the direct detection of a low-mass companion at a projected separation of 55 ± 2 AU around the B9-type star κ Andromedae. The properties of the system (mass ratio, separation) make it a benchmark for understanding the formation and evolution of gas giant planets and brown dwarfs on wide orbits.
Aims: We present…
The interstellar cloud surrounding the Sun: a new perspective
Jenkins, Edward B.; Gry, Cécile
Aims: We offer a new, simpler picture of the local interstellar medium, made of a single continuous cloud enveloping the Sun. This new outlook enables the description of a diffuse cloud from within and brings to light some unexpected properties.
Methods: We re-examine the kinematics and abundances of the local interstellar gas, as reveal…
Evidence for major mergers of galaxies at 2 ≲ z < 4 in the VVDS and VUDS surveys
Kneib, J. -P.; Maccagni, D.; Ilbert, O. +20 more
Context. The mass assembly of galaxies can proceed through different physical processes. Here we report on the spectroscopic identification of close physical pairs of galaxies at redshifts 2 ≲ z< 4 and discuss the impact of major mergers in building galaxies at these early cosmological times.
Aims: We aim to identify and characterize close…