Search Publications
Fornax3D project: Overall goals, galaxy sample, MUSE data analysis, and initial results
de Zeeuw, P. T.; McDermid, R. M.; Falcón-Barroso, J. +10 more
The Fornax cluster provides a uniquely compact laboratory in which to study the detailed history of early-type galaxies and the role played by the environment in driving their evolution and their transformation from late-type galaxies. Using the superb capabilities of the Multi Unit Spectroscopic Explorer on the Very Large Telescope, high-quality …
Structure of photodissociation fronts in star-forming regions revealed by Herschel observations of high-J CO emission lines
Le Bourlot, J.; Le Petit, F.; Pinto, C. +17 more
Context. In bright photodissociation regions (PDR) associated with massive star formation, the presence of dense "clumps" that are immersed in a less dense interclump medium is often proposed to explain the difficulty of models to account for the observed gas emission in high-excitation lines.
Aims: We aim to present a comprehensive view of t…
Spectroscopic and physical parameters of Galactic O-type stars. III. Mass discrepancy and rotational mixing
Puls, J.; Langer, N.; Markova, N.
Context. Massive stars play a key role in the evolution of galaxies and our Universe.
Aims: Our goal is to compare observed and predicted properties of single Galactic O stars to identify and constrain uncertain physical parameters and processes in stellar evolution and atmosphere models.
Methods: We used a sample of 53 objects of all lu…
Revised Gaia Data Release 2 passbands
Weiler, Michael
Context. The European Space Agency mission Gaia has published, with its second data release (DR2), a catalogue of photometric measurements for more than 1.3 billion astronomical objects in three passbands. The precision of the measurements in these passbands, denoted G, GBP, and GRP, reach down to the milli-magnitude level. T…
Two transitional type Ia supernovae located in the Fornax cluster member NGC 1404: SN 2007on and SN 2011iv
Challis, P.; Suntzeff, N. B.; Filippenko, A. V. +26 more
We present an analysis of ultraviolet (UV) to near-infrared observations of the fast-declining Type Ia supernovae (SNe Ia) 2007on and 2011iv, hosted by the Fornax cluster member NGC 1404. The B-band light curves of SN 2007on and SN 2011iv are characterised by Δm15 (B) decline-rate values of 1.96 mag and 1.77 mag, respectively. Although …
Luminosities and mass-loss rates of Local Group AGB stars and red supergiants
Groenewegen, M. A. T.; Sloan, G. C.
Context. Mass loss is one of the fundamental properties of asymptotic giant branch (AGB) stars, and through the enrichment of the interstellar medium, AGB stars are key players in the life cycle of dust and gas in the universe. However, a quantitative understanding of the mass-loss process is still largely lacking.
Aims: We aim to investigate…
Characterising open clusters in the solar neighbourhood with the Tycho-Gaia Astrometric Solution
Jordi, C.; Casamiquela, L.; Cantat-Gaudin, T. +8 more
Context. The Tycho-Gaia Astrometric Solution (TGAS) subset of the first Gaia catalogue contains an unprecedented sample of proper motions and parallaxes for two million stars brighter than G 12 mag.
Aims: We take advantage of the full astrometric solution available for those stars to identify the members of known open clusters and compute mea…
Spectroscopic Parameters and atmosphEric ChemIstriEs of Stars (SPECIES). I. Code description and dwarf stars catalogue
Soto, M. G.; Jenkins, J. S.
Context. The detection and subsequent characterisation of exoplanets are intimately linked to the characteristics of their host star. Therefore, it is necessary to study the star in detail in order to understand the formation history and characteristics of their companion(s).
Aims: Our aims are to develop a community tool that allows the auto…
The XXL Survey. XXV. Cosmological analysis of the C1 cluster number counts
Chiappetti, L.; Altieri, B.; Valtchanov, I. +26 more
Context. We present an estimation of cosmological parameters with clusters of galaxies.
Aims: We constrain the Ωm, σ8, and w parameters from a stand-alone sample of X-ray clusters detected in the 50 deg2 XMM-XXL survey with a well-defined selection function.
Methods: We analyse the redshift distribution o…
The Gaia-ESO Survey: open clusters in Gaia-DR1 . A way forward to stellar age calibration
Gilmore, G.; Bayo, A.; Bouy, H. +42 more
Context. Determination and calibration of the ages of stars, which heavily rely on stellar evolutionary models, are very challenging, while representing a crucial aspect in many astrophysical areas.
Aims: We describe the methodologies that, taking advantage of Gaia-DR1 and the Gaia-ESO Survey data, enable the comparison of observed open star …