Search Publications
Towards a complete stellar mass function of the Hyades. I. Pan-STARRS1 optical observations of the low-mass stellar content
Price, P. A.; Henning, T.; Chen, W. P. +15 more
Aims: The Hyades cluster is an ideal target to study the dynamical evolution of a star cluster over the entire mass range due to its intermediate age and proximity to the Sun.
Methods: We wanted to extend the Hyades mass function towards lower masses down to 0.1 M⊙ and to use the full three-dimensional spatial information to c…
HERschel Observations of Edge-on Spirals (HEROES). I. Far-infrared morphology and dust mass determination
Blommaert, J. A. D. L.; Bianchi, S.; Fritz, J. +11 more
Context. Edge-on spiral galaxies with prominent dust lanes provide us with an excellent opportunity to study the distribution and properties of the dust within them. The HEROES project was set up to observe a sample of seven large edge-on galaxies across various wavelengths for this investigation.
Aims: Within this first paper, we present the…
Young stars in ɛ Chamaleontis and their disks: disk evolution in sparse associations
Henning, Th.; van Boekel, R.; Lawson, W. A. +3 more
Context. The nearby young stellar association ɛ Cha has an estimated age of 3-5 Myr, making it an ideal laboratory to study the disk dissipation process and provide empirical constraints on the timescale of planet formation.
Aims: We wish to complement existing optical and near-infrared data of the ɛ Cha association, which provide the stellar…
Planck intermediate results. IV. The XMM-Newton validation programme for new Planck galaxy clusters
Böhringer, H.; Kneissl, R.; Dahle, H. +191 more
We present the final results from the XMM-Newton validation follow-up of new Planck galaxy cluster candidates. We observed 15 new candidates, detected with signal-to-noise ratios between 4.0 and 6.1 in the 15.5-month nominal Planck survey. The candidates were selected using ancillary data flags derived from the ROSAT All Sky Survey (RASS) and Digi…
Gas and dust in the TW Hydrae association as seen by the Herschel Space Observatory
Pinte, C.; Duchêne, G.; Dent, W. R. F. +15 more
Context. Circumstellar discs are the places where planets form, therefore knowledge of their evolution is crucial for our understanding of planet formation. The Herschel Space Observatory is providing valuable data for studying disc systems, thanks to its sensitivity and wavelength coverage. This paper is one of several devoted to analysing and mo…
Recent star formation in the Lupus clouds as seen by Herschel
Hill, T.; White, G. J.; André, Ph. +26 more
We present a study of the star formation histories of the Lupus I, III, and IV clouds using the Herschel 70-500 µm maps obtained by the Herschel Gould Belt Survey Key Project. By combining the new Herschel data with the existing Spitzer catalog we obtained an unprecedented census of prestellar sources and young stellar objects in the Lupus c…
The spectroscopic evolution of the recurrent nova T Pyxidis during its 2011 outburst. II. The optically thin phase and the structure of the ejecta in recurrent novae
Sion, E. M.; Shore, S. N.; Starrfield, S. +4 more
Aims: We continue our study of the physical properties of the recurrent nova T Pyx, focussing on the structure of the ejecta in the nebular stage of expansion during the 2011 outburst.
Methods: The nova was observed contemporaneously with the Nordic Optical Telescope (NOT), at high resolution spectroscopic resolution (R ≈ 65 000) on 2011…
AKARI North Ecliptic Pole Deep Survey. Revision of the catalogue via a new image analysis
Małek, K.; Ohyama, Y.; Pearson, C. +10 more
Context. We present the revised near- to mid-infrared catalogue of the AKARI North Ecliptic Pole deep survey. The survey has the unique advantage of continuous filter coverage from 2 to 24 µm over nine photometric bands, but the initial version of the survey catalogue leaves room for improvement in the image analysis stage; the original imag…
CoRoT 102918586: a γ Doradus pulsator in a short-period eccentric eclipsing binary
Gandolfi, D.; Rainer, M.; Montalbán, J. +2 more
Pulsating stars in eclipsing binary systems are powerful tools to test stellar models. Binarity enables us to constrain the pulsating component's physical parameters and this knowledge drastically improves the input physics for asteroseismic studies. The study of stellar oscillations then allows us to improve our understanding of stellar interiors…
Deuterated water in the solar-type protostars NGC 1333 IRAS 4A and IRAS 4B
Codella, C.; Ceccarelli, C.; van Dishoeck, E. F. +19 more
Context. The measure of the water deuterium fractionation is a relevant tool for understanding mechanisms of water formation and evolution from the prestellar phase to the formation of planets and comets.
Aims: The aim of this paper is to study deuterated water in the solar-type protostars NGC 1333 IRAS 4A and IRAS 4B, to compare their HDO ab…