Search Publications
The relation between the column density structures and the magnetic field orientation in the Vela C molecular complex
Ade, P. A. R.; Martin, P. G.; Netterfield, C. B. +27 more
We statistically evaluated the relative orientation between gas column density structures, inferred from Herschel submillimetre observations, and the magnetic field projected on the plane of sky, inferred from polarized thermal emission of Galactic dust observed by the Balloon-borne Large-Aperture Submillimetre Telescope for Polarimetry (BLASTPol)…
VLT/FORS2 view at z 6: Lyman-α emitter fraction and galaxy physical properties at the edge of the epoch of cosmic reionization
Maiolino, R.; Dickinson, M.; Finkelstein, S. L. +10 more
The fraction of Lyman-α emitters (LAEs) among the galaxy population has been found to increase from z 0 to z 6 and drop dramatically at z> 6. This drop has been interpreted as an effect of an increasingly neutral intergalactic medium (IGM) with increasing redshift, while a Lyman continuum escape fraction evolving with redshift and/or a sudden c…
Properties of the molecular gas in the fast outflow in the Seyfert galaxy IC 5063
Morganti, Raffaella; Oosterloo, Tom; Combes, Françoise +5 more
We present a detailed study of the properties of the molecular gas in the fast outflow driven by the active galactic nucleus (AGN) in the nearby radio-loud Seyfert galaxy IC 5063. By using ALMA observations of a number of tracers of the molecular gas (12CO(1-0), 12CO(2-1), 12CO(3-2), 13CO(2-1) and HCO
The AMBRE project: The thick thin disk and thin thick disk of the Milky Way
Recio-Blanco, A.; de Laverny, P.; Hayden, M. R. +2 more
We analyze 494 main sequence turnoff and subgiant stars from the AMBRE:HARPS survey. These stars have accurate astrometric information from Gaia DR1, providing reliable age estimates with relative uncertainties of ±1 or 2 Gyr and allowing precise orbital determinations. The sample is split based on chemistry into a low-[Mg/Fe] sequence, which are …
Galactocentric variation of the gas-to-dust ratio and its relation with metallicity
König, C.; Menten, K. M.; Leurini, S. +6 more
Context. The assumption of a gas-to-dust mass ratio γ is a common approach to estimate the basic properties of molecular clouds, such as total mass and column density of molecular hydrogen, from (sub)mm continuum observations of the dust. In the Milky Way a single value is used at all galactocentric radii, independently of the observed metallicity…
The earliest phases of high-mass star formation, as seen in NGC 6334 by Herschel-HOBYS
Bernard, J. -P.; Martin, P. G.; Hill, T. +33 more
Aims: To constrain models of high-mass star formation, the Herschel-HOBYS key program aims at discovering massive dense cores (MDCs) able to host the high-mass analogs of low-mass prestellar cores, which have been searched for over the past decade. We here focus on NGC 6334, one of the best-studied HOBYS molecular cloud complexes.
Method…
Active galactic nuclei vs. host galaxy properties in the COSMOS field
Berta, S.; Pozzi, F.; Salvato, M. +13 more
Context. The coeval active galactic nuclei (AGN) and galaxy evolution, and the observed local relations between super massive black holes (SMBHs) and galaxy properties suggest some sort of connection or feedback between SMBH growth (I.e., AGN activity) and galaxy build-up (I.e., star formation history).
Aims: We looked for correlations betwee…
Asymptotic g modes: Evidence for a rapid rotation of the solar core
Provost, J.; Corbard, T.; Turck-Chièze, S. +11 more
Context. Over the past 40 years, helioseismology has been enormously successful in the study of the solar interior. A shortcoming has been the lack of a convincing detection of the solar g modes, which are oscillations driven by gravity and are hidden in the deepest part of the solar body - its hydrogen-burning core. The detection of g modes is ex…
Chasing obscuration in type-I AGN: discovery of an eclipsing clumpy wind at the outer broad-line region of NGC 3783
Kaastra, J. S.; Kriss, G. A.; Arav, N. +21 more
In 2016 we carried out a Swift monitoring programme to track the X-ray hardness variability of eight type-I AGN over a year. The purpose of this monitoring was to find intense obscuration events in AGN, and thereby study them by triggering joint XMM-Newton, NuSTAR, and HST observations. We successfully accomplished this for NGC 3783 in December 20…
The MUSE Hubble Ultra Deep Field Survey. X. Lyα equivalent widths at 2.9 < z < 6.6
Inami, H.; Richard, J.; Verhamme, A. +17 more
We present rest-frame Lyα equivalent widths (EW0) of 417 Lyα emitters (LAEs) detected with Multi Unit Spectroscopic Explorer (MUSE) on the Very Large Telescope (VLT) at 2.9 <z< 6.6 in the Hubble Ultra Deep Field. Based on the deep MUSE spectroscopy and ancillary Hubble Space Telescope (HST) photometry data, we carefully measured E…