Publications (20)
Pulsation of the Lambda Bootis star HD 210111
M. Breger, P. Beck, P. Lenz +3
CONTEXT. The Lambda Bootis stars are a small spectroscopic subgroup of Population I A-type stars and show significant underabundances of metals. Many are Delta Scuti pulsators. AIM…
Photometric multi-site campaign on the open cluster NGC 884 I. Detection of the variable stars
S. Saesen, F. Carrier, A. Pigulski +62
CONTEXT: Recent progress in the seismic interpretation of field beta Cep stars has resulted in improvements of the physics in the stellar structure and evolution models of massive…
The Castalia Mission to Main Belt Comet 133P/Elst-Pizarro
C. Snodgrass, G. H. Jones, H. Boehnhardt +41
We describe Castalia, a proposed mission to rendezvous with a Main Belt Comet (MBC), 133P/Elst-Pizarro. MBCs are a recently discovered population of apparently icy bodies within th…
Infrared detection of aliphatic organics on a cometary nucleus
A. Raponi, M. Ciarniello, F. Capaccioni +28
The ESA Rosetta mission has acquired unprecedented measurements of comet 67/P-Churyumov-Gerasimenko (hereafter 67P) nucleus surface, whose composition, as determined by in situ and…
SHADOWS: a spectro-gonio radiometer for bidirectional reflectance studies of dark meteorites and terrestrial analogs: design, calibrations, and performances on challenging surfaces
S. Potin, O. Brissaud, P. Beck +5
We have developed a new spectro-gonio radiometer, SHADOWS, to study in the laboratory the bidirectional reflectance distribution function of dark and precious samples. The instrume…
The Nysa family as the main source of unequilibrated LL ordinary chondrites
M. Marsset, P. Vernazza, M. Brož +16
Context. The origin of the petrologic diversity observed in ordinary chondrites (OCs), the most common meteorites on Earth, remains debated. Competing models invoke either depth-de…
2006 Whole Earth Telescope Observations of GD358: A New Look at the Prototype DBV
J. L. Provencal, M. H. Montgomery, A. Kanaan +53
We report on the analysis of 436.1 hrs of nearly continuous high-speed photometry on the pulsating DB white dwarf GD358 acquired with the Whole Earth Telescope (WET) during the 200…
Some things special about NEAs: Geometric and environmental effects on the optical signatures of hydration
S. Potin, P. Beck, B. Schmitt +1
Here were report on a laboratory study aiming to reproduce specificities of near-Earth Asteroid. We study how the elevated surface temperature, their surface roughness (rock or reg…
The iron record of asteroidal processes in carbonaceous chondrites
A. Garenne, P. Beck, G. Montes-Hernandez +4
The valence of iron has been used in terrestrial studies to trace the hydrolysis of primary silicate rocks. Here, we use a similar approach to characterize the secondary processes,…
Ammonium salts are a reservoir of nitrogen on a cometary nucleus and possibly on some asteroids
O. Poch, I. Istiqomah, E. Quirico +29
The measured nitrogen-to-carbon ratio in comets is lower than for the Sun, a discrepancy which could be alleviated if there is an unknown reservoir of nitrogen in comets. The nucle…
Detection and characterization of an ultra-dense sub-Neptune planet orbiting the Sun-like star HD 119130
R. Luque, G. Nowak, E. Pallé +51
We present the discovery and characterization of a new transiting planet from Campaign 17 of the Kepler extended mission K2. HD 119130 b is a warm sub-Neptune on a 17-d orbit aroun…
Mineralogy, chemistry and composition of organic compounds in the fresh carbonaceous chondrite Mukundpura: CM1 or CM2?
S. Potin, P. Beck, L. Bonal +7
We present here several laboratory analyses performed on the freshly fallen Mukundpura CM chondrite. Results of infrared transmission spectroscopy, thermogravimetry analysis and re…
Investigating S-type asteroid surfaces through reflectance spectra of Ordinary Chondrites
J. Eschrig, L. Bonal, M. Mahlke +3
We present an in-depth study of the reflectance spectra of 39 equilibrated and 41 unequilibrated ordinary chondrites. We demonstrate that consistent measuring conditions are vital…
Style and intensity of hydration among C-complex asteroids: a comparison to dessicated carbonaceous chondrites
S. Potin, P. Beck, F. Usui +3
Here we report a comparison between reflectance spectroscopy of meteorites under asteroidal environment (high vacuum and temperature) and Main Belt and Near Earth Asteroids spectra…
A model of the 3-μm hydration band with Exponentially Modified Gaussian (EMG) profiles: application to hydrated chondrites and asteroids
S. Potin, S. Manigand, P. Beck +2
We present here a new method to model the shape of the 3-μm absorption band in the reflectance spectra of meteorites and small bodies. The band is decomposed into several OH/H2O c…
HD219666b: A hot-Neptune from TESS Sector 1
M. Esposito, D. J. Armstrong, D. Gandolfi +73
We report on the confirmation and mass determination of a transiting planet orbiting the old and inactive G7 dwarf star HD219666 (Mstar = 0.92 +/- 0.03 MSun, Rstar = 1.03 +/- 0.03…
Amides from the carbonaceous asteroid (162173) Ryugu: nanoscale spectral and isotopic characterizations
L. G. Vacher, V. T. H. Phan, L. Bonal +5
C-type asteroids, such as asteroid (162173) Ryugu, may have played a key role in delivering light elements to early Earth. Nitrogen (N)-bearing molecules have been chemically ident…
Spectral investigation of Ceres analogue mixtures: in-depth analysis of crater central peak material (ccp) on Ceres
A. Galiano, F. Dirri, E. Palomba +3
In order to investigate the causes of different spectral slope in ccps, different grain-sizes of Ceres analogue mixtures were produced, heated to remove absorption of atmospheric w…
Different origins or different evolutions? Decoding the spectral diversity among C-type asteroids
P. Vernazza, J. Castillo-Rogez, P. Beck +15
Anhydrous pyroxene-rich interplanetary dust particles (IDPs) have been proposed as surface analogs for about two-thirds of all C-complex asteroids. However, this suggestion appears…
KIC 8410637: a 408-day period eclipsing binary containing a pulsating red giant
S. Frandsen, H. Lehmann, S. Hekker +10
Detached eclipsing binaries (dEBs) are ideal targets for accurate measurement of masses and radii of ther component stars. If at least one of the stars has evolved off the main seq…