Search Publications
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…
Constraining the structure of the transition disk HD 135344B (SAO 206462) by simultaneous modeling of multiwavelength gas and dust observations
Pinte, C.; Ménard, F.; Duchêne, G. +14 more
Context. Constraining the gas and dust disk structure of transition disks, particularly in the inner dust cavity, is a crucial step toward understanding the link between them and planet formation. HD 135344B is an accreting (pre-)transition disk that displays the CO 4.7 µm emission extending tens of AU inside its 30 AU dust cavity.
Aims…
Planck 2013 results. III. LFI systematic uncertainties
Bernard, J. -P.; Planck Collaboration; Aghanim, N. +218 more
We present the current estimate of instrumental and systematic effect uncertainties for the Planck-Low Frequency Instrument relevant to the first release of the Planck cosmological results. We give an overview of the main effects and of the tools and methods applied to assess residuals in maps and power spectra. We also present an overall budget o…
A resolved analysis of cold dust and gas in the nearby edge-on spiral NGC 891
Clements, D. L.; Boquien, M.; Bianchi, S. +18 more
We investigate the connection between dust and gas in the nearby edge-on spiral galaxy NGC 891, a target of the Very Nearby Galaxies Survey. High resolution Herschel PACS and SPIRE 70, 100, 160, 250, 350, and 500 µm images are combined with JCMT SCUBA 850 µm observations to trace the far-infrared/submillimetre spectral energy distribut…