International audience
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September 2018 (v1)Journal articleUploaded on: December 4, 2022
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2008 (v1)Conference paper
International audience
Uploaded on: December 4, 2022 -
2005 (v1)Conference paper
Asteroseismology aims at constraining the stellar evolution theory, and allows to determine the age of stars together with other fundamental parameters. We present recent results obtained by interferometry, and prospects for the future.
Uploaded on: December 3, 2022 -
July 2019 (v1)Journal article
Measuring the atmospheric circulation of Venus at different altitudes is important for understanding its complex dynamics, in particular the mechanisms driving super-rotation. Observationally, Doppler imaging spectroscopy is in principle the most reliable way to measure wind speeds of planetary atmospheres because it directly provides the...
Uploaded on: December 4, 2022 -
August 2001 (v1)Journal article
Solar diameter measurements performed with the Calern Observatory astrolabe (O.C.A - France) during more than two solar cycles show temporal variations. Due to the weather, seasonal effects and instrumental characteristics, recorded solar data are non uniformly sampled and present temporal gaps. Thus, to analyze these data, diameter...
Uploaded on: December 3, 2022 -
May 21, 2019 (v1)Journal article
International audience
Uploaded on: December 4, 2022 -
August 6, 2017 (v1)Conference paper
This paper describes instrumentation used to adapt the Dunn Solar Telescope (DST) located on Sacramento Peak in Sunspot, NM for observations using the Doppler Spectro Imager (DSI). The DSI is based on a Mach-Zehnder interferometer and measures the Doppler shift of solar lines to allow the study of atmospheric dynamics of giant planets and the...
Uploaded on: December 4, 2022 -
June 30, 2008 (v1)Publication
ASTEP South is the first phase of the ASTEP project that aims to determine the quality of Dome C as a site for future photometric searches for transiting exoplanets and discover extrasolar planets from the Concordia base in Antarctica. ASTEP South consists of a front-illuminated 4k x 4k CCD camera, a 10 cm refractor, and a simple mount in a...
Uploaded on: December 4, 2022 -
June 26, 2016 (v1)Conference paper
The measurements of radial velocity fields on planets with a Doppler Spectro-Imager allow the study of atmospheric dynamics of giant planets and the detection of their acoustic oscillations. The frequencies of these oscillations lead to the determination of the internal structure by asteroseismology. A new imaging tachometer, based on a...
Uploaded on: December 4, 2022 -
September 15, 2019 (v1)Conference paper
We present velocity maps of Jupiter obtained from the ground with a dedicated Doppler imaging spectrograph. It demonstrates the potential of this method to study the motion in the atmosphere of gaseous planets. It proves to be complementary to cloud-tracking to understand the atmospheric dynamics
Uploaded on: December 4, 2022 -
July 17, 2022 (v1)Conference paper
The AOC (Adaptive Optics at Calern) project is an adaptive optics bench being installed on one of the two 1-m telescopes of C2PU (Centre Pédagogique Planète Univers), situated in the Calern observatory, Observatoire de la Côte d'Azur, near Nice (France). AOC is installed at the Coudé focus of the telescope, and aims at working in the visible...
Uploaded on: December 3, 2022 -
August 21, 2017 (v1)Conference paper
We present the identification of very low frequency g modes, in the asymptotic regime, and two important parameters: the core rotation rate and the asymptotic equidistant period spacing of these g modes. The GOLF instrument on the SOHO space observatory has provided two decades of full disk helioseismic data. The search for g modes in GOLF...
Uploaded on: December 4, 2022 -
July 17, 2022 (v1)Conference paper
On December 2021, a new camera box for two-colour simultaneous visible photometry was successfully installed on the ASTEP telescope at the Concordia station in Antarctica. The new focal box offers increased capabilities for the ASTEP+ project. The opto-mechanical design of the camera was described in a previous paper.1 Here, we focus on the...
Uploaded on: December 3, 2022 -
2022 (v1)Journal article
On December 2021, a new camera box for two-colour simultaneous visible photometry was successfully installed on the ASTEP telescope at the Concordia station in Antarctica. The new focal box offers increased capabilities for the ASTEP+ project. The opto-mechanical design of the camera was described in a previous paper. 1 Here, we focus on the...
Uploaded on: May 26, 2023 -
September 16, 2018 (v1)Conference paper
We present the first measurements of Jupiter's wind profile obtained from radial-velocity measurements. Radial velocity measurements of wind are rather difficult, but can be very interesting as they measure the actual speed of cloud particles instead of the motion of large cloud structures. Here we present the first scientific results of the...
Uploaded on: December 3, 2022 -
2004 (v1)Conference paper
Recent site seeing testing campaigns conducted by our team from University of Nice1 show that Dome C represents the best site on Earth for astronomical high angular resolution (HAR) observations at optical and IR wavelengths. The dramatic gain over relevant HAR parameters r0, L0, θ0 and τ0, added to very low temperatures during the polar winter...
Uploaded on: December 4, 2022 -
July 17, 2022 (v1)Conference paper
The possibility to observe transiting exoplanets from Dome C in Antarctica provides immense benefits: stable weather conditions, limited atmospheric turbulence, and a night that lasts almost three months due to the austral winter. However, this site also presents significant limitations, such as limited access for maintenance and internet...
Uploaded on: May 28, 2023 -
May 11, 2009 (v1)Conference paper
ASTEP South is an Antarctic Search for Transiting Exo- Planets in the South pole field, from the Concordia station, Dome C, Antarctica. The instrument consists of a thermalized 10 cm refractor observing a fixed 3.88° x 3.88° field of view to perform photometry of several thousand stars at visible wavelengths (700-900 nm). The first winter...
Uploaded on: December 4, 2022