Publications (31)
Modelling the Galactic Interstellar Extinction Distribution in Three Dimensions
D. J. Marshall, A. C. Robin, C. Reyle +2
The Two Micron All Sky Survey, along with the Stellar Population Synthesis Model of the Galaxy, developed in Besancon, is used to calculate the extinction distribution along differ…
Selection constraints on high redshift quasar searches in the VISTA kilo-degree infrared galaxy survey
J. R. Findlay, W. J. Sutherland, B. P. Venemans +5
The European Southern Observatory's (ESO) Visible and Infrared Survey Telescope for Astronomy (VISTA) is a 4-m class survey telescope for wide-field near-infrared imaging. VISTA is…
Six more quasars at redshift 6 discovered by the Canada-France High-z Quasar Survey
C. J. Willott, P. Delorme, C. Reyle +9
We present imaging and spectroscopic observations for six quasars at z>5.9 discovered by the Canada-France High-z Quasar Survey (CFHQS). The CFHQS contains sub-surveys with a range…
The 10 parsec sample in the Gaia era: first update
C. Reyle, K. Jardine, P. Fouque +3
The nearest stars provide a fundamental constraint for our understanding of stellar physics and the Galaxy. The nearby sample serves as an anchor where all objects can be studied a…
The SDSS-III APOGEE Radial Velocity Survey of M dwarfs I: Description of Survey and Science Goals
R. Deshpande, C. H. Blake, C. F. Bender +28
We are carrying out a large ancillary program with the SDSS-III, using the fiber-fed multi-object NIR APOGEE spectrograph, to obtain high-resolution H-band spectra of more than 120…
The design and performance of the Gaia photometric system
C. Jordi, E. Hoeg, A. G. A. Brown +32
The European Gaia astrometry mission is due for launch in 2011. Gaia will rely on the proven principles of ESA's Hipparcos mission to create an all-sky survey of about one billion…
Spectroscopic characterization of 78 DENIS ultracool dwarf candidates in the solar neighborhood and the Upper Sco OB association
E. L. Martin, N. Phan-Bao, M. Bessell +6
Aims: Low-resolution optical spectroscopic observations for 78 very low-mass star and brown dwarf candidates that have been photometrically selected using the DENIS survey point so…
Dark halo baryons not in ancient halo white dwarfs
M. Creze, V. Mohan, A. C. Robin +5
Having ruled out the possibility that stellar objects are the main contributor of the dark matter embedding galaxies, microlensing experiments cannot exclude the hypothesis that a…
New nearby stars selected in a high proper motion survey by DENIS photometry
C. Reyle, A. C. Robin, R. -D. Scholz +1
We present new nearby stars extracted from a proper motion catalogue and having a DENIS counterpart. Their distances and spectral type are estimated using the DENIS colours. 107 st…
Search for star clusters close to the Galactic plane with DENIS
C. Reyle, A. C. Robin
An automated search for star clusters close to the Galactic plane (|b| < 5 deg) was carried out on the Point Source Catalogue of the DENIS survey. 44% of the Galactic plane have be…
Discovery of a widely separated binary system of very low mass stars
N. Phan-Bao, E. L. Martin, C. Reyle +2
We report our discovery of a nearby wide binary system, LP 714-37 AB. Phan-Bao et al. identified LP 714-37 as a mid-M dwarf during a cross-identification of the NLTT and DENIS cata…
The Milky Way's external disc constrained by 2MASS star counts
C. Reyle, D. J. Marshall, A. C. Robin +1
Context. Thanks to recent large scale surveys in the near infrared such as 2MASS, the galactic plane that most suffers from extinction is revealed and its overall structure can be…
Early galaxy evolution from deep wide field star counts. I. The spheroid density law and mass function
A. C. Robin, C. Reyle, M. Creze
As part of a global analysis of deep star counts to constrain scenarii of galaxy formation and evolution, we investigate possible links between the galactic spheroid and the dark m…
Evolution over time of the Milky Way's disc shape
E. B. Amores, A. C. Robin, C. Reyle
Context. Galactic structure studies can be used as a path to constrain the scenario of formation and evolution of our Galaxy. The dependence with the age of stellar population para…
The very low mass multiple system LHS\,1070 -- a testbed for model atmospheres for the lower end of the main sequence
A. S. Rajpurohit, C. Reyle, M. Schultheis +8
LHS1070 is a nearby multiple system of low mass stars. It is an important source of information for probing the low mass end of the main sequence, down to the hydrogen-burning limi…
Optical spectroscopy of high proper motion stars: new M dwarfs within 10 pc and the closest pair of subdwarfs
C. Reyle, R. -D. Scholz, M. Schultheis +2
We present spectra of 59 nearby stars candidates, M dwarfs and white dwarfs, previously identified using high proper motion catalogues and the DENIS database. We review the existin…
Spitzer Mid-Infrared Photometry of 500 - 750 K Brown Dwarfs
S. K. Leggett, L. Albert, E. Artigau +11
Mid-infrared data, including Spitzer warm-IRAC [3.6] and [4.5] photometry, is critical for understanding the cold population of brown dwarfs now being found, objects which have mor…
The Galactic bulge as seen in optical surveys
C. Reyle, D. J. Marshall, M. Schultheis +1
The bulge is a region of the Galaxy of tremendous interest for understanding galaxy formation. However measuring photometry and kinematics in it raises several inherent issues, suc…
The Effective temperature scale of M dwarfs from spectral synthesis
C. Reyle, A. S. Rajpurohit, M. Schultheis +1
We present a comparison of low-resolution spectra of 60 stars covering the whole M-dwarf sequence. Using the most recent PHOENIX BT-Settl stellar model atmospheres (see paper by F.…
The large scale dust lanes of the Galactic bar
D. J. Marshall, R. Fux, A. C. Robin +1
(abridged) By comparing the distribution of dust and gas in the central regions of the Galaxy, we aim to obtain new insights into the properties of the offset dust lanes leading th…
A dynamically young and perturbed Milky Way disk
T. Antoja, A. Helmi, M. Romero-Gomez +10
The evolution of the Milky Way disk, which contains most of the stars in the Galaxy, is affected by several phenomena. For example, the bar and the spiral arms of the Milky Way ind…
New neighbours VI. Spectroscopy of DENIS nearby stars candidates
F. Crifo, N. Phan-Bao, X. Delfosse +4
We present spectra of 36 nearby star candidates and 3 red giant candidates, identified in the DENIS database by Phan-Bao et al. (2003). 32 of the dwarf candidates are indeed nearby…
High Resolution Spectroscopy of M subdwarfs
A. S. Rajpurohit, C. Reyle, M. Schultheis +1
M subdwarfs are metal poor and cool stars. They are important probes of the old galactic populations. However, they remain elusive due to their low luminosity. Observational and mo…
The ultracool-field dwarf luminosity-function and space density from the Canada-France Brown Dwarf Survey
C. Reyle, P. Delorme, C. J. Willott +7
Context. Thanks to recent and ongoing large scale surveys, hundreds of brown dwarfs have been discovered in the last decade. The Canada-France Brown Dwarf Survey is a wide-field su…
PLATO as it is: a legacy mission for Galactic archaeology
A. Miglio, C. Chiappini, B. Mosser +102
Deciphering the assembly history of the Milky Way is a formidable task, which becomes possible only if one can produce high-resolution chrono-chemo-kinematical maps of the Galaxy.…
A high resolution spectroscopic atlas of M subdwarfs - Effective temperature and metallicity
A. S. Rajpurohit, C. Reyle, F. Allard +4
Context. M subdwarfs are metal poor and cool stars. They are important probes of the old galactic populations. However, they remain elusive due to their low luminosity. Observation…
Gaia Focused Product Release: A catalogue of sources around quasars to search for strongly lensed quasars
Gaia Collaboration, A. Krone-Martins, C. Ducourant +398
Context. Strongly lensed quasars are fundamental sources for cosmology. The Gaia space mission covers the entire sky with the unprecedented resolution of " in the optical, ma…
Spectral energy distribution of M-subdwarfs: A study of their atmospheric properties
A. S. Rajpurohit, C. Reyle, F. Allard +5
Context. M-type subdwarfs are metal-poor low-mass stars and probe for the old populations in our Galaxy. Accurate knowledge of their atmospheric parameters and especially the compo…
The ultracool eld dwarfs luminosity function from the Canada-France Brown Dwarf Survey
C. Reyle, P. Delorme, X. Delfosse +4
The Canada-France Brown Dwarf Survey is a wide eld survey for cool brown dwarfs conducted with the MegaCam camera on the CFHT telescope. Our objectives are to nd ultracool brown dw…
Widely separated binary systems of very low mass stars
N. Phan-Bao, E. L. Martin, C. Reyle +2
In this paper we review some recent detections of wide binary brown dwarf systems and discuss them in the context of the multiplicity properties of very low-mass stars and brown dw…
Constraining the thick disc formation scenario of the Milky Way
A. C. Robin, C. Reyle, J. Fliri +3
We study the shape of the thick disc using photometric data at high and intermediate latitudes from SDSS and 2MASS surveys. We use the population synthesis approach using an ABC-MC…