Zobrazeno 1 - 10
of 236
pro vyhledávání: '"de Kok R"'
Autor:
Vinatier, S., Schmitt, B., Bézard, B., Rannou, P., Dauphin, C., de Kok, R., Jennings, D. E., Flasar, F. M.
Publikováno v:
Icarus, 2018
We report the detection of a spectral signature observed at 682 cm$^{-1}$ by the Cassini Composite Infrared Spectrometer (CIRS) in nadir and limb geometry observations of Titan's southern stratospheric polar region in the middle of southern fall, whi
Externí odkaz:
http://arxiv.org/abs/1805.01414
Autor:
Hoeijmakers, H. J., Schwarz, H., Snellen, I. A. G., de Kok, R. J., Bonnefoy, M., Chauvin, G., Lagrange, A. M., Girard, J. H.
Publikováno v:
A&A 617, A144 (2018)
ADI and SDI are well-established high-contrast imaging techniques, but their application is challenging for companions at small angular separations. The aim of this paper is to investigate to what extent adaptive-optics assisted, medium-resolution (R
Externí odkaz:
http://arxiv.org/abs/1802.09721
Autor:
Brogi, M., Giacobbe, P., Guilluy, G., de Kok, R. J., Sozzetti, A., Mancini, L., Bonomo, A. S.
Publikováno v:
A&A 615, A16 (2018)
High-resolution spectroscopy (R $\ge$ 20,000) at near-infrared wavelengths can be used to investigate the composition, structure, and circulation patterns of exoplanet atmospheres. However, up to now it has been the exclusive dominion of the biggest
Externí odkaz:
http://arxiv.org/abs/1801.09569
We report the detection of water absorption features in the dayside spectrum of the first-known hot Jupiter, 51 Peg b, confirming the star-planet system to be a double-lined spectroscopic binary. We used high-resolution (R~100,000), 3.2 micron spectr
Externí odkaz:
http://arxiv.org/abs/1701.07257
Autor:
Ridden-Harper, A. R., Snellen, I. A. G., Keller, C. U., de Kok, R. J., Di Gloria, E., Hoeijmakers, H. J., Brogi, M., Fridlund, M., Vermeersen, B. L. A., van Westrenen, W.
Publikováno v:
A&A 593, A129 (2016)
[Abridged] The aim of this work is to search for an absorption signal from exospheric sodium (Na) and singly ionized calcium (Ca$^+$) in the optical transmission spectrum of the hot rocky super-Earth 55 Cancri e. Although the current best-fitting mod
Externí odkaz:
http://arxiv.org/abs/1606.08447
Giant exoplanets orbiting very close to their parent star (hot Jupiters) are subject to tidal forces expected to synchronize their rotational and orbital periods on short timescales (tidal locking). However, spin rotation has never been measured dire
Externí odkaz:
http://arxiv.org/abs/1512.05175
Publikováno v:
A&A 575, A20 (2015)
The spectral signature of an exoplanet can be separated from the spectrum of its host star using high-resolution spectroscopy. During such observations, the radial component of the planet's orbital velocity changes, resulting in a significant Doppler
Externí odkaz:
http://arxiv.org/abs/1411.6017
Autor:
Maltagliati, L., Bézard, B., Vinatier, S., Hedman, M. M., Lellouch, E., Nicholson, P. D., Sotin, C., de Kok, R. J., Sicardy, B.
Publikováno v:
Icarus 248 (2015) 1-24
We present an analysis of the VIMS solar occultations dataset, which allows us to extract vertically resolved information on the characteristics of Titan's atmosphere between 100-700 km with a characteristic vertical resolution of 10 km. After a seri
Externí odkaz:
http://arxiv.org/abs/1405.6324
(Abridged) In recent years, ground-based high-resolution spectroscopy has become a powerful tool for investigating exoplanet atmospheres. It allows the robust identification of molecular species, and it can be applied to both transiting and non-trans
Externí odkaz:
http://arxiv.org/abs/1404.3769
Autor:
Birkby, J. L., de Kok, R. J., Brogi, M., de Mooij, E. J. W., Schwarz, H., Albrecht, S., Snellen, I. A. G.
We report a 4.8 sigma detection of water absorption features in the day side spectrum of the hot Jupiter HD 189733 b. We used high-resolution (R~100,000) spectra taken at 3.2 microns with CRIRES on the VLT to trace the radial-velocity shift of the wa
Externí odkaz:
http://arxiv.org/abs/1307.1133