A5035451811- Stellar, planetary, and galactic studies
- Astro and Planetary Science
- Planetary Science and Exploration
- Solar and Space Plasma Dynamics
- Astrophysics and Star Formation Studies
- Astronomy and Astrophysical Research
- Space Exploration and Technology
- Spacecraft Design and Technology
- Astronomical Observations and Instrumentation
- Spaceflight effects on biology
- Space Science and Extraterrestrial Life
- Spacecraft and Cryogenic Technologies
- Space exploration and regulation
- Atmospheric Ozone and Climate
- Geophysics and Gravity Measurements
- Fullerene Chemistry and Applications
- Adaptive optics and wavefront sensing
- Ionosphere and magnetosphere dynamics
- Atomic and Molecular Physics
- Inertial Sensor and Navigation
- Geochemistry and Geologic Mapping
- Molecular Spectroscopy and Structure
- Advanced Chemical Physics Studies
- Calibration and Measurement Techniques
- Spectroscopy and Laser Applications
European Space Research and Technology Centre
2014-2023
University of Atacama
2023
Leiden University
2022-2023
Vrije Universiteit Amsterdam
2011-2023
Leiden Observatory
2021
Digital Research Alliance of Canada
2021
European Space Agency
2006-2009
European Southern Observatory
1986-2008
Purple Mountain Observatory
2007
University of Cambridge
2000
<i>Aims. <i/>We report the discovery of very shallow (), periodic dips in light curve an active G9V star observed by CoRoT satellite, which we interpret as caused a transiting companion. We describe 3-colour data and complementary ground-based observations that support planetary nature companion.<i>Methods. used colours information, good angular resolution photometric in- out- transit, adaptive optics imaging, near-infrared spectroscopy, preliminary results from radial velocity measurements,...
We review the results of 1988 multiwavelength campaign on late-type eclipsing binary YY Geminorum. Observations include: broad-band optical and near-infrared photometry, simultaneous ultraviolet (IUE) spectroscopy, X-ray (Ginga) radio (VLA) data. From models fitted to light curves, fundamental physical parameters have been determined together with evidence for transient maculations (spots) located near quadrature longitudes intermediate latitudes. Eclipses were observed at optical,...
The space experiment CoRoT has recently detected transits by a hot Jupiter across the disc of an active G7V star (CoRoT-Exo-2a) that can be considered as good proxy for Sun at age approximately 0.5 Gyr. We present spot modelling optical variability during 142 days uninterrupted observations performed with unprecedented photometric precision. apply approaches previously tested in case total solar irradiance variations. To model light curve CoRoT-Exo-2a, we take into account both effects cool...
Recent advances in laboratory spectroscopy lead to the claim of ionized Buckminsterfullerene (C60+) as carrier two diffuse interstellar bands (DIBs) near-infrared. However, irrefutable identification C60+ requires a match between wavelengths and expected strengths all absorption features detectable space. Here we present Hubble Space Telescope (HST) spectra region covering 9348, 9365, 9428 9577 {\AA} toward seven heavily-reddened stars. We focus particular on searching for weaker bands, very...
Teams of mobile robots will play a crucial role in future missions to explore the surfaces extraterrestrial bodies. Setting up infrastructure and taking scientific samples are expensive tasks when operating distant, challenging, unknown environments. In contrast current single-robot space missions, heterogeneous robotic teams increase efficiency via enhanced autonomy parallelization, improve robustness functional redundancy, as well benefit from complementary capabilities individual robots....
We report a deep survey of diffuse interstellar bands (DIBs) between 3906 Å and 6812 Åunder consistent observing conditions toward three very reddened five unreddened stars. BD+63° 1964's line-of-sight was shown to present exceptional DIB enhancement in number as well strength. The early spectral type the star use spectra an comparison same allowed limit stellar line residuals. Using careful reduction analysis methods we discovered 60 new DIBs which are confirmed targets HD 183143 BD+40°...
The Large Magellanic Cloud (LMC) offers a unique laboratory to study the diffuse interstellar bands (DIBs) under conditions that are profoundly different from those in Galaxy. DIB carrier abundances depend on several environmental factors, particular local UV radiation field. In this paper we present measurements of twelve DIBs five lines sight early-type stars LMC, including 30 Doradus region. From high resolution spectra obtained with VLT/UVES also derive parameters characterise medium...
The carriers of the diffuse interstellar bands (DIBs) are largely unidentified molecules ubiquitously present in medium (ISM). After decades study, two strong and possibly three weak near-infrared DIBs have recently been attributed to C60+ fullerene based on observational laboratory measurements. There is great promise for identification over 400 other known DIBs, as this result could provide chemical hints towards possible carriers. In an effort systematically study properties DIB carriers,...
In 2019 it was exactly 100 years ago that the first two DIBs, diffuse interstellar bands, were discovered by Mary Lea Heger. Today some 500 + DIBs are known. numerous observational, modelling and laboratory studies, efforts have been made to identify carriers of these absorption features observed in light reddened stars crossing translucent clouds. Despite several claims over specific could be assigned species, not one withstood dedicated follow-up studies. An exception is C60+. 2015,...
We have computed physical parameters such as density, degree of ionization and temperature, constrained by a large observational data set on atomic molecular species, for the line sight toward single cloud HD 147889. Diffuse interstellar bands (DIBs) produced along this are well documented can be used to test PAH hypothesis. To effect, charge state fractions different polycyclic aromatic hydrocarbons (PAHs) calculated in 147889 function depth derived electron abundance temperature profile....
The hygiene area is one of the most important facilities in a space station. If its environmental lighting appropriately designed, it can significantly reduce psychological pressure on astronauts. This study investigates effect correlated colour temperature (CCT) heart rate, galvanic skin response, emotion and satisfaction Forty subjects participated experiments simulator with controlled environment. conditions included 2700 K, 3300 3600 5000 K 6300 K; physiological responses (heart...
During space missions, astronauts live in a confined technological environment, completely isolated and deprived of the variety variation found environment on Earth. This circumstance has strong impact psycho-physiological states crew. Particularly light plans for long-duration new research needs to be carried out. The goal this study, conducted at Xiangtan Central Hospital China, was test whether multicolour lighting can improve people’s psychological state an over period seven days. Twenty...
This study investigated the effects of nine colour environments on visual tracking accuracy and strain during normal sitting (SP), -12° head-down bed (HD) 9.6° head-up tilt (HU). In a standard posture change laboratory study, fifty-four participants performed tasks in while three postures. Visual was measured by means questionnaire. The results showed that all environments, rest significantly affected strain. During postures, participants' cyan environment higher than other their lowest....
We present data from high-dispersion echelle spectra and simultaneous $uvby$ photometry for $\gamma$~Doradus. These were obtained several sites during 1994 November as part of the MUSICOS-94 campaign. The star has two closely-spaced periods about 0.75 d is brightest member a new class variable early F-type stars. A previously suspected third period, very close to other two, confirmed. Previous observations indicated that sudden changes could be expected in spectrum, but none found radial...
The space experiment CoRoT has recently detected a transiting hot Jupiter in orbit around moderately active F-type main-sequence star (CoRoT-Exo-4a). This planetary system is of particular interest because it an orbital period 9.202 days, the second longest one among planets known to date. We study surface rotation and activity host during uninterrupted sequence optical observations 58 days. Our approach based on maximum entropy spot modelling technique extensively tested by variation total...
Gas phase spectroscopic laboratory experiments for the buckminsterfullerene cation C60+ resulted in accurate rest wavelengths five transitions that have been compared with diffuse interstellar bands (DIBs) near infra-red. Detecting these astronomical spectra is difficult due to strong contamination of ground-based by atmospheric water vapor, presence weak and shallow stellar lines and/or blending other DIBs. The detection two has claimed several teams, three additional weaker detected a few...
Abstract Due to recent advances in laboratory spectroscopy, the first optical detection of a very large molecule has been claimed diffuse interstellar medium (ISM): (ionized Buckminsterfullerene). Confirming presence this would have significant implications regarding carbon budget and chemical complexity ISM. Here we present results from new method for ultra-high signal-to-noise ratio (S/N) spectroscopy background stars near-infrared (at wavelengths 0.9–1 μ m), using Hubble Space Telescope (...