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Author  |
Trouvilliez A. |
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Report |
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2010 |
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1013 |
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Bachelor's thesis |
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yes |
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503 |
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Title |
The plasma environment of Mars : from the shocked solar wind down to the ionosphere. |
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Journal Article |
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Year |
2000 |
Publication |
Planetary and space science |
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Volume |
48 |
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Pages |
1181-1192 |
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907 |
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0032-0633 |
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yes |
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2303 |
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Author |
Tristan Guillot, Djamel Mekarnia, Lyu Abe, Abdelkrim Agabi, Francois-Xavier Schmider, Eric Chapellier, Lionel Bigot, ASTEP Team |
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Title |
Characterization of beta pic and its planet from Dome C, Antarctica |
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Communication |
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Year |
2017 |
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American Astronomical Society, DPS meeting #49, id.500.03 |
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The Beta Pictoris system is unique: It is a young (20Ma), very bright star, with a debris disk seen edge-on, and a directly imaged planet, Beta Pic b. In addition, the planet, which has a probable 18 years orbital period, is due to nearly transit in front of its star during 2017. In 1981 a mysterious event has been invoked as possibly due to the same planet transiting the star. The unique opportunity of this configuration led an international consortium to follow the star photometrically and by radial velocimetry. I will present the observations conducted from the Concordia base, Antarctica with the ASTEP photometric telescope continuously from March to October 2017. The lightcurves of excellent quality allow a clear determination of the pulsation frequencies of the star (a Delta Scuti) and the possibility to detect signs of Beta Pic b or its perturbations of the disk, possible rings or large moons, and additional planets. At the time of the presentation, the observations will have just ended, enabling a complete analysis. |
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1066 |
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yes |
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7822 |
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Title |
Comparison of polar ozone loss rates simulated by one-dimensional and three-dimensional models with Match observations in recent Antarctic and Arctic winters |
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Journal Article |
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Year |
2007 |
Publication |
Journal of geophysical research-atmospheres |
Abbreviated Journal |
J. Geophys. Res. |
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112 |
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Keywords |
Ozone loss rates; transport model; trajectory model; 0340 Atmospheric Composition and Structure: Middle atmosphere: composition and chemistry; 0341 Atmospheric Composition and Structure: Middle atmosphere: constituent transport and chemistry; 3334 Atmospheric Processes: Middle atmosphere dynamics; 3360 Atmospheric Processes: Remote sensing; 3319 Atmospheric Processes: General circulation |
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Abstract |
Simulations of ozone loss rates using a three-dimensional chemical transport model and a box model during recent Antarctic and Arctic winters are compared with experimental loss rates. The study focused on the Antarctic winter 2003, during which the first Antarctic Match campaign was organized, and on Arctic winters 1999/2000, 2002/2003. The maximum ozone loss rates retrieved by the Match technique for the winters and levels studied reached 6 ppbv/sunlit hour and both types of simulations could generally reproduce the observations at 2-sigma error bar level. In some cases, for example, for the Arctic winter 2002/2003 at 475 K level, an excellent agreement within 1-sigma standard deviation level was obtained. An overestimation was also found with the box model simulation at some isentropic levels for the Antarctic winter and the Arctic winter 1999/2000, indicating an overestimation of chlorine activation in the model. Loss rates in the Antarctic show signs of saturation in September, which have to be considered in the comparison. Sensitivity tests were performed with the box model in order to assess the impact of kinetic parameters of the ClO-Cl2O2 catalytic cycle and total bromine content on the ozone loss rate. These tests resulted in a maximum change in ozone loss rates of 1.2 ppbv/sunlit hour, generally in high solar zenith angle conditions. In some cases, a better agreement was achieved with fastest photolysis of Cl2O2 and additional source of total inorganic bromine but at the expense of overestimation of smaller ozone loss rates derived later in the winter. |
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209 |
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American Geophysical Union |
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0148-0227 |
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yes |
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Call Number |
IPEV @ Thierry.Lemaire @ |
Serial |
5648 |
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Title |
TOI-2525 b and c: A Pair of Massive Warm Giant Planets with Strong Transit Timing Variations Revealed by TESS* |
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Journal |
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Year |
2023 |
Publication |
The Astronomical Journal |
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Volume |
165 |
Issue |
4 |
Pages |
179 |
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The K-type star TOI-2525 has an estimated mass of M = M ? and radius of R = R ? observed by the TESS mission in 22 sectors (within sectors 1 and 39). The TESS light curves yield significant transit events of two companions, which show strong transit timing variations (TTVs) with a semiamplitude of ?6 hr. We performed TTV dynamical and photodynamical light-curve analysis of the TESS data combined with radial velocity measurements from FEROS and PFS, and we confirmed the planetary nature of these companions. The TOI-2525 system consists of a transiting pair of planets comparable to Neptune and Jupiter with estimated dynamical masses of m b = and m c = M Jup, radii of r b = and r c = R Jup, and orbital periods of P b = and P c = days for the inner and outer planet, respectively. The period ratio is close to the 2:1 period commensurability, but the dynamical simulations of the system suggest that it is outside the mean-motion resonance (MMR) dynamical configuration. Object TOI-2525 b is among the lowest-density Neptune-mass planets known to date, with an estimated median density of ? b = g cm?3. The TOI-2525 system is very similar to the other K dwarf systems discovered by TESS, TOI-2202 and TOI-216, which are composed of almost identical K dwarf primaries and two warm giant planets near the 2:1 MMR. |
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1066 |
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ISSN |
1538-3881 |
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yes |
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8646 |
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Author |
Triest J, Alemany O, |
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Title |
Drill fluid selection for the SUBGLACIOR probe: a review of silicone oil as a drill fluid
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Type |
Journal Article |
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Year |
2014 |
Publication |
Annals of Glaciology |
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Volume |
55 |
Issue |
68 |
Pages |
311-321 |
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Programme |
1119 |
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International Glaciological Society |
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ISSN |
02603055 |
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yes |
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5945 |
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Author |
Tremblin P, Schneider N, Minier V, Durand G Al, Urban J, |
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Title |
Worldwide site comparison for submillimetre astronomy
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Type |
Journal Article |
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Year |
2012 |
Publication |
A&A |
Abbreviated Journal |
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Volume |
548 |
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Keywords |
Astrophysics – Instrumentation and Methods for Astrophysics, |
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Abstract |
The most important limitation for ground-based submillimetre (submm) astronomy is the broad-band absorption of the total water vapour in the atmosphere above an observation site, often expressed as the Precipitable Water Vapour (PWV). A long-term statistic on the PWV is thus mandatory to characterize the quality of an existing or potential site for observational submm-astronomy. In this study we present a three-year statistic (2008-2010) of the PWV for ground-based telescope sites all around the world and for stratospheric altitudes relevant for SOFIA (Stratospheric Observatory for Far-infrared astronomy). The submm-transmission is calculated for typical PWVs using an atmospheric model. We present the absolute PWV values for each site sorted by year and time percentage. The PWV corresponding to the first decile (10%) and the quartiles (25%, 50%, 75%) are calculated and transmission curves between 150 {\mu}m and 3 mm for these values are shown. The Antarctic and South-American sites present very good conditions for submillimetre astronomy. The 350 {\mu}m and 450 {\mu}m atmospheric windows are open all year long whereas the 200 {\mu}m atmospheric window opens reasonably for 25 % of the time in Antarctica and the extremely high-altitude sites in Chile. Potential interesting new facilities are Macon in Argentinia and Summit in Greenland that show similar conditions as for example Mauna Kea (Hawaii). For SOFIA, we present in more detail transmission curves for different altitudes (11 to 14 km), PWV values, and higher frequencies (up to 5 THz). Though the atmosphere at these altitude is generally very transparent, the absorption at very high frequencies becomes more important, partly caused by minor species. In conclusion, the method presented in this paper could identify sites on Earth with a great potential for submillimetre astronomy, and guide future site testing campaigns in situ. |
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1040 |
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yes |
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4645 |
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Author |
Tremblin P, Minier V, Schneider N, Durand G Al, Ashley M C B, Lawrence J S, Luong-Van D M, Storey J W V, Durand G An, Reinert Y, Veyssiere C, Walter C, Ade P, Calisse P G, Challita Z, Fossat E, Sabbatini L, Pellegrini A, Ricaud P, Urban J, |
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Title |
Site testing for submillimetre astronomy at Dome C,
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Journal Article |
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Year |
2011 |
Publication |
A&A |
Abbreviated Journal |
0935-4956 |
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Volume |
535 |
Issue |
A112 |
Pages |
535 |
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910 |
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0935-4956 |
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yes |
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Serial |
698 |
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Tremblay, Y., Scaffer, S.C.A., Fowler S.L., Kuhn, K., McDonald B.I., Weise M.J., Bost, C.A., Weimerskirch, H., Crocker, D.E., Goebel, M.E. & Costa, D. P. |
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Title |
Interpolation of tracking data in a fluid environment. |
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Journal Article |
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Year |
2006 |
Publication |
Journal of experimental biology |
Abbreviated Journal |
J. Exp. Biol. |
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Volume |
209 |
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Pages |
128-140 |
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394 |
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0022-0949 |
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yes |
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5138 |
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Author |
Tremblay Y., Guinard E. & Cherel Y. |
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Title |
Maximum diving depths of northern rockhopper penguins (Eudyptes chrysocome moseleyi) at Amsterdam Island. |
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Journal Article |
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Year |
1997 |
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Polar biology |
Abbreviated Journal |
Polar Biol. |
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17 |
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119-122 |
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109 |
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0722-4060 |
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yes |
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899 |
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