Search Publications
A library of near-infrared integral field spectra of young M-L dwarfs
Pinte, C.; Homeier, D.; Lagrange, A. -M. +5 more
Context. At young ages, low surface gravity affects the atmospheric properties of ultracool dwarfs. The impact on medium-resolution near-infrared (NIR) spectra has only been slightly investigated at the M-L transition so far.
Aims: We present a library of NIR (1.1-2.45 µm) medium-resolution (R ~ 1500-2000) integral field spectra of 15 y…
The Besançon Galaxy model renewed. I. Constraints on the local star formation history from Tycho data
Luri, X.; Figueras, F.; Haywood, M. +2 more
Context. The understanding of Galaxy evolution can be facilitated by the use of population synthesis models, which allows us to test hypotheses on the star formation history, star evolution, and chemical and dynamical evolution of the Galaxy.
Aims: The new version of the Besançon Galaxy model (BGM) aims to provide a more flexible and powerful…
The Gaia FGK benchmark stars. High resolution spectral library
Soubiran, C.; Heiter, U.; Blanco-Cuaresma, S. +1 more
Context. An increasing number of high-resolution stellar spectra is available today thanks to many past and ongoing spectroscopic surveys. Consequently, numerous methods have been developed to perform an automatic spectral analysis on a massive amount of data. When reviewing published results, biases arise and they need to be addressed and minimiz…
ALMA reveals the feeding of the Seyfert 1 nucleus in NGC 1566
Tacconi, L. J.; Hunt, L. K.; Krips, M. +9 more
We report ALMA observations of CO(3-2) emission in the Seyfert 1 galaxy NGC 1566, at a spatial resolution of 25 pc. Our aim is to investigate the morphology and dynamics of the gas inside the central kpc, and to probe nuclear fueling and feedback phenomena. NGC 1566 has a nuclear bar of 1.7 kpc radius and a conspicuous grand design spiral starting…
Planck 2013 results. VIII. HFI photometric calibration and mapmaking
Kneissl, R.; Miville-Deschênes, M. -A.; Boulanger, F. +226 more
This paper describes the methods used to produce photometrically calibrated maps from the Planck High Frequency Instrument (HFI) cleaned, time-ordered information. HFI observes the sky over a broad range of frequencies, from 100 to 857 GHz. To obtain the best calibration accuracy over such a large range, two different photometric calibration schem…
Reconstructing the density and temperature structure of prestellar cores from Herschel data: A case study for B68 and L1689B
Abergel, A.; Hill, T.; Roussel, H. +22 more
Utilizing multiwavelength dust emission maps acquired with Herschel, we reconstruct local volume density and dust temperature profiles for the prestellar cores B68 and L1689B using an inverse-Abel transform-based technique. We present intrinsic radial dust temperature profiles of starless cores directly from dust continuum emission maps disentangl…
Statistical survey of widely spread out solar electron events observed with STEREO and ACE with special attention to anisotropies
Gómez-Herrero, R.; Malandraki, O.; Dresing, N. +4 more
Context. In February 2011, the two STEREO spacecrafts reached a separation of 180 degrees in longitude, offering a complete view of the Sun for the first time ever. When the full Sun surface is visible, source active regions of solar energetic particle (SEP) events can be identified unambiguously. STEREO, in combination with near-Earth observatori…
Planck intermediate results. XVI. Profile likelihoods for cosmological parameters
Kneissl, R.; Miville-Deschênes, M. -A.; Bernard, J. -P. +182 more
We explore the 2013 Planck likelihood function with a high-precision multi-dimensional minimizer (Minuit). This allows a refinement of the ΛCDM best-fit solution with respect to previously-released results, and the construction of frequentist confidence intervals using profile likelihoods. The agreement with the cosmological results from the Bayes…
Gas structure inside dust cavities of transition disks: Ophiuchus IRS 48 observed by ALMA
van Dishoeck, Ewine F.; van der Marel, Nienke; Bruderer, Simon +1 more
Context. Transition disks are recognized by the absence of emission of small dust grains inside a radius of up to several 10s of AUs. Owing to the lack of angular resolution and sensitivity, the gas content of these dust holes has not yet been determined, but is of importance for constraining the mechanism leading to the dust holes. It is thought …
Planck intermediate results. XIII. Constraints on peculiar velocities
Dahle, H.; Miville-Deschênes, M. -A.; Bernard, J. -P. +182 more
Using Planck data combined with the Meta Catalogue of X-ray detected Clusters of galaxies (MCXC), we address the study of peculiar motions by searching for evidence of the kinetic Sunyaev-Zeldovich effect (kSZ). By implementing various filters designed to extract the kSZ generated at the positions of the clusters, we obtain consistent constraints …