F. Philipot
A5052194119- Stellar, planetary, and galactic studies
- Astronomy and Astrophysical Research
- Astro and Planetary Science
- Astrophysics and Star Formation Studies
- Gamma-ray bursts and supernovae
- Astronomical Observations and Instrumentation
- Astronomical and nuclear sciences
- Nuclear Physics and Applications
- Adaptive optics and wavefront sensing
- Geomagnetism and Paleomagnetism Studies
Laboratoire d’études spatiales et d’instrumentation en astrophysique
2022-2024
Observatoire de Paris
2023-2024
Université Paris Sciences et Lettres
2022-2024
Sorbonne Université
2022-2024
Université Paris Cité
2022-2024
Centre National de la Recherche Scientifique
2022-2024
Université de Versailles Saint-Quentin-en-Yvelines
2023-2024
Janssen (France)
2023
Sorbonne Paris Cité
2022
Of the approximately 25 directly imaged planets to date, all are younger than 500 Myr, and but six 100 Myr (ref.
Aims. HD 206893 is a nearby debris disk star that hosts previously identified brown dwarf companion with an orbital separation of ∼10 au. Long-term precise radial velocity (RV) monitoring, as well anomalies in the system proper motion, has suggested presence additional, inner system. Methods. Using information from ongoing precision RV measurements HARPS spectrograph, Gaia host astrometry, we have undertaken multi-epoch search for purported additional planet using VLTI/GRAVITY instrument....
Aims. Giant planets play a major role in multiple planetary systems. Knowing their demographics is important to test overall impact on the formation of It also processes. Recently, three radial velocity (RV) surveys have established distributions giant planets. All show steep increase up 1–3 au, and two suggest decrease beyond that. Methods. We aim understand limitations associated with characterization long-period RV planets, estimate distribution these Results. revisit results obtained by...
We aim at searching for exoplanets on the whole ESO/VLT-SPHERE archive with improved and unsupervised data analysis algorithm that could allow to detect massive giant planets 5 au. To prepare, test optimize our approach, we gathered a sample of twenty four solar-type stars observed SPHERE using angular spectral differential imaging modes. use PACO, new generation recently developed, has been shown outperform classical methods. also improve pre-reduction pipeline, outputs PACO enhance...
Context . Thanks to more than 20 yr of monitoring, the radial velocity (RV) method has detected long-period companions ( P > 10 yr) around several dozens stars. Yet, true nature these remains unclear because uncertainty as inclination companion orbital plane. Aims We wish constrain and mass single companions. Methods used a Markov chain Monte Carlo (MCMC) fitting algorithm combine RV measurements with absolute astrometry and, when available, relative data. Results have lifted sin( i )...
Transiting planets with orbital periods longer than 40 d are extremely rare among the 5000+ discovered so far. The lack of discoveries this population poses a challenge to research into planetary demographics, formation, and evolution. Here, we present detection characterization HD 88986 b, potentially transiting sub-Neptune, possessing longest period known small (<4 R ⊕ ) precise mass measurement ( σ M /M > 25%). Additionally, identified presence massive companion in wider orbit...
Context. Although more than one thousand sub-stellar companions have already been detected with the radial velocity (RV) method, many new remain to be in public RV archives. Aims. We wish use archival data obtained ESO/HARPS spectrograph search for companions. Methods. astronomic acceleration measurements of stars Hipparcos and Gaia satellites identify anomalies that could explained by presence a companion. Once hints companion are found, we combine absolute astrometry and, when available,...
Context. Giant planets play a major role in multiple planetary systems. Knowing their demographics is important to test overall impact on systems formation. It also formation processes. Recently, three radial velocity surveys have established distributions of giant planets. All show steep increase up 1-3 au, and two suggest decrease beyond. Aims. We aim at understanding the limitations associated with characterization long-period planets, estimate distribution these Methods. revisit results...
We aim at searching for exoplanets on the whole ESO/VLT-SPHERE archive with improved and unsupervised data analysis algorithm that could allow to detect massive giant planets 5 au. To prepare, test optimize our approach, we gathered a sample of twenty four solar-type stars observed SPHERE using angular spectral differential imaging modes. use PACO, new generation recently developed, has been shown outperform classical methods. also improve pre-reduction pipeline, outputs PACO enhance...
In a previous paper, we introduced new tool called " pmex ", or . This characterizes the mass and sma ) of possible companion around any source observed with Gaia using value renormalized unit weight error ( ruwe ), both Hipparcos pma either alone combined Our goal is to exploit large volume sources in g3 catalog find exoplanet candidates. We wish create input planet-candidate-hosting systems enable future follow-up projects. Beyond magnitude 14, this would prepare arrival powerful...
The Gaia mission is expected to yield the detection of several thousands exoplanets, perhaps at least doubling number known exoplanets. However, only 72 candidates have been reported with publication third data release, or g3 ). Although a greater harvest exoplanets occur astrometric time series in DR4 eve 2026, already precious database that can be used search for beyond 1\,au. With this objective, we characterized multiple systems by exploiting two signatures derived from solution bright...
Long term precise radial velocity (RV) monitoring of the nearby star HD206893, as well anomalies in system proper motion, have suggested presence an additional, inner companion system. Here we describe results a multi-epoch search for responsible this RV drift and motion anomaly using VLTI/GRAVITY instrument. Utilizing information from ongoing precision measurements with HARPS spectrograph, Gaia host astrometry, report high significance detection HD206893c over three epochs, clear evidence...
Context. Although more than one thousand sub-stellar companions have already been detected with the radial velocity (RV) method, many new remain to be in public RV archives. Aims. We wish use archival data obtained ESO/HARPS spectrograph search for companions. Methods. astronomic acceleration measurements of stars Hipparcos and Gaia satellites identify anomalies that could explained by presence a companion. Once hints companion are found, we combine absolute astrometry and, when available,...
Transiting planets with orbital periods longer than 40 d are extremely rare among the 5000+ discovered so far. The lack of discoveries this population poses a challenge to research into planetary demographics, formation, and evolution. Here, we present detection characterization HD88986b, potentially transiting sub-Neptune, possessing longest period known small (< 4 R$_{\oplus}$) precise mass measurement ($\sigma_M/M$ > 25%). Additionally, identified presence massive companion in wider orbit...