Cyrielle Opitom
YOU?
Author Swipe
View article: JWST Detection of a Carbon-dioxide-dominated Gas Coma Surrounding Interstellar Object 3I/ATLAS
JWST Detection of a Carbon-dioxide-dominated Gas Coma Surrounding Interstellar Object 3I/ATLAS Open
3I/ATLAS is the third confirmed interstellar object to visit our solar system and only the second to display a clear coma. Infrared spectroscopy with the James Webb Space Telescope (JWST) provides the opportunity to measure its coma compos…
View article: Snapshot of a new interstellar comet: 3I/ATLAS has a red and featureless spectrum
Snapshot of a new interstellar comet: 3I/ATLAS has a red and featureless spectrum Open
The interstellar comet 3I/ATLAS is only the third interstellar object to be discovered. Pre-perihelion measurements provide a unique opportunity to study its activity and composition, which may alter as it is heated in the coming months. W…
View article: Using ground-based IFUs to constrain cometary activity drivers
Using ground-based IFUs to constrain cometary activity drivers Open
Despite over a century of cometary observations, we are still struggling to understand the activity of comets. Questions such as ‘what drives the activity of comets at different distances from the Sun?’ or ‘Does the activity of all comets …
View article: Systematic Assessment of Comet Behavior Using the Volatile Activity Monitoring and Prediction (VAMP) Tool
Systematic Assessment of Comet Behavior Using the Volatile Activity Monitoring and Prediction (VAMP) Tool Open
The development of all-sky surveys and the upcoming LSST’s deep, wide-field capabilities will enable the discovery of many more faint and distant comets, allowing them to be tracked from the outer solar system and revealing early activity …
View article: The Icy Surface of Great Comet Hale-Bopp at 46 au as Revealed by JWST
The Icy Surface of Great Comet Hale-Bopp at 46 au as Revealed by JWST Open
Comets are small solar system objects that undergo periods of mass-loss (activity) due to insolation-driven sublimation. When a comet is active, surface and near-surface material is ejected from the nucleus and made available for study in …
View article: CRIRES+ investigations of the volatile composition of Halley-type comet 12P/Pons-Brooks during its exceptional passage in 2024
CRIRES+ investigations of the volatile composition of Halley-type comet 12P/Pons-Brooks during its exceptional passage in 2024 Open
We present the results obtained from VLT/CRIRES+ observations of the Halley-type comet 12P/Pons-Brooks, during its exceptional apparition in 2024. Comets are considered among the least processed bodies of the solar system. Stored in a froz…
View article: Ground-based observations of (65803) Didymos 2.5 years after the DART impact: searching for ongoing evolution
Ground-based observations of (65803) Didymos 2.5 years after the DART impact: searching for ongoing evolution Open
On 2022 September 26, NASA's DART mission intentionally impacted Dimorphos, the moon of near-Earth asteroid (65803) Didymos, changing the binary system’s orbital period. The system was studied intensively from the ground over the ensuing m…
View article: A portrait throughout perihelion of the NH2-rich interstellar comet 2I/Borisov
A portrait throughout perihelion of the NH2-rich interstellar comet 2I/Borisov Open
The interstellar comet 2I/Borisov is the first interstellar object where compositional characterisation was possible throughout its entire perihelion passage. We report all 16 epochs of a comprehensive optical observation campaign with ESO…
View article: JWST observations of distant long period comet C/2024 E1 (Wierzchos)
JWST observations of distant long period comet C/2024 E1 (Wierzchos) Open
We observed the recently discovered long period comet C/2024 E1 (Wierzchos) with JWST at three epochs in 2024 and 2025 as it approaches its perihelion in 2026. These observations, at heliocentric distances of approximately 7, 5 and 3 au, b…
View article: Rotation Period of Comet C/2006 P1 (McNaught) Through Coma Morphology
Rotation Period of Comet C/2006 P1 (McNaught) Through Coma Morphology Open
Comets are among the most primitive and unaltered small bodies in the solar system, offering critical insights into the early conditions of solar system formation. Originating from distant reservoirs such as the Oort Cloud, Scattered Disk,…
View article: A portrait throughout perihelion of the NH$_2$-rich interstellar comet 2I/Borisov
A portrait throughout perihelion of the NH$_2$-rich interstellar comet 2I/Borisov Open
The interstellar comet 2I/Borisov is the first interstellar object where compositional characterisation was possible throughout its entire perihelion passage. We report all 16 epochs of a comprehensive optical observation campaign with ESO…
View article: Snapshot of a new interstellar comet: 3I/ATLAS has a red and featureless spectrum
Snapshot of a new interstellar comet: 3I/ATLAS has a red and featureless spectrum Open
The interstellar comet 3I/ATLAS is only the third interstellar object to be discovered. Pre-perihelion measurements provide a unique opportunity to study its activity and composition, which may alter as it is heated in the coming months. W…
View article: Tuning the Legacy Survey of Space and Time Observing Strategy for Solar System Science: Incremental Templates in Year 1
Tuning the Legacy Survey of Space and Time Observing Strategy for Solar System Science: Incremental Templates in Year 1 Open
The Vera C. Rubin Observatory is due to commence the 10 yr Legacy Survey of Space and Time (LSST) at the end of 2025. To detect transient/variable sources and identify solar system objects (SSOs), the processing pipelines require templates…
View article: Characterization of the DART Ejecta Using Computer Modeling of the Ground-based and HST Photopolarimetric Data
Characterization of the DART Ejecta Using Computer Modeling of the Ground-based and HST Photopolarimetric Data Open
Among the published observations of the DART ejecta, we have identified a set of quasi-simultaneous data acquired on 2022 October 4–5, using different but complementary techniques: polarimetry (FORS2 at the Very Large Telescope (VLT)), spe…
View article: First <i>JWST</i> spectrum of distant activity in long-period comet C/2024 E1 (Wierzchos)
First <i>JWST</i> spectrum of distant activity in long-period comet C/2024 E1 (Wierzchos) Open
We observed the new long-period comet C/2024 E1 (Wierzchos), inbound at 7 au from the Sun, using the Near-Infrared Spectrograph (NIRSpec) integral field unit on JWST. The spectrum shows absorption features due to water ice in the coma and …
View article: A Swarm of WASP Planets: Nine giant planets identified by the WASP survey
A Swarm of WASP Planets: Nine giant planets identified by the WASP survey Open
The Wide Angle Search for Planets (WASP) survey provided some of the first transiting hot Jupiter candidates. With the addition of the Transiting Exoplanet Survey Satellite (TESS), many WASP planet candidates have now been revisited and gi…
View article: Brightness Behavior of Distant Oort Cloud Comets
Brightness Behavior of Distant Oort Cloud Comets Open
Dynamically new comets provide important insights into the conditions of the presolar nebula and its evolution, as they are believed to have experienced minimal solar heating before their discovery. Since 2020 August, the Las Cumbres Obser…
View article: Tuning the Legacy Survey of Space and Time (LSST) Observing Strategy for Solar System Science: Incremental Templates in Year 1
Tuning the Legacy Survey of Space and Time (LSST) Observing Strategy for Solar System Science: Incremental Templates in Year 1 Open
The Vera C. Rubin Observatory is due to commence the 10-year Legacy Survey of Space and Time (LSST) at the end of 2025. To detect transient/variable sources and identify solar system objects (SSOs), the processing pipelines require templat…
View article: Coma composition and profiles of comet 12P/Pons–Brooks using long-slit spectroscopy
Coma composition and profiles of comet 12P/Pons–Brooks using long-slit spectroscopy Open
Comet 12P/Pons–Brook exhibited multiple large and minor outbursts in 2023 on its way to its 2024 perihelion, as it has done during its previous apparitions. We obtained long-slit optical spectra of the comet in 2023 August and November wit…
View article: The Blue Multi Unit Spectroscopic Explorer (BlueMUSE) on the VLT: science drivers and overview of instrument design (Erratum)
The Blue Multi Unit Spectroscopic Explorer (BlueMUSE) on the VLT: science drivers and overview of instrument design (Erratum) Open
International audience
View article: WST - Widefield Spectroscopic Telescope: motivation, science drivers and top level requirements for a new dedicated facility
WST - Widefield Spectroscopic Telescope: motivation, science drivers and top level requirements for a new dedicated facility Open
In this paper, we describe the wide-field spectroscopic survey telescope (WST) project. WST is a 12-metre wide-field spectroscopic survey telescope with simultaneous operation of a large field-of-view (3 sq. degree), high-multiplex (20,000…
View article: The Blue Multi Unit Spectroscopic Explorer (BlueMUSE) on the VLT: science drivers and overview of instrument design
The Blue Multi Unit Spectroscopic Explorer (BlueMUSE) on the VLT: science drivers and overview of instrument design Open
BlueMUSE is a blue-optimised, medium spectral resolution, panoramic integral\nfield spectrograph under development for the Very Large Telescope (VLT). With\nan optimised transmission down to 350 nm, spectral resolution of R$\\sim$3500 on\n…
View article: Characterizing the Distant Outbursts of the Largest Known Comet C/2014 UN271 (Bernardinelli&#8211;Bernstein)
Characterizing the Distant Outbursts of the Largest Known Comet C/2014 UN271 (Bernardinelli–Bernstein) Open
The discovery of the long-period comet C/2014 UN271 (Bernardinelli–Bernstein) was announced in June 2021 [1] and quickly brought attention to this unique and remarkable object. Archival observations revealed that the comet had been a…
View article: A link between the size and composition of comets
A link between the size and composition of comets Open
INTRODUCTIONWe present the results of our recent work investigating possible correlations between cometary composition and nucleus size, as detailed in Robinson et al. 2024. This work follows on from laboratory experiments and numerical mo…
View article: Narrowband Observation of Comet C/2006 P1 (McNaught) and Its Rotational Period through Morphological Analysis
Narrowband Observation of Comet C/2006 P1 (McNaught) and Its Rotational Period through Morphological Analysis Open
The pristine nature of comets offers invaluable insights into the formation and evolution of the early solar system. Examining their morphological features is crucial for understanding their composition, activity, and dynamics. Here we use…
View article: Characterizing the dust in active asteroids by modeling their photometric and polarimetric images
Characterizing the dust in active asteroids by modeling their photometric and polarimetric images Open
In this presentation, we explore photometric and polarimetric observations of the asteroids that became active either naturally or as a result of space experiments.As an example of naturally active asteroids, we consider asteroid (248370) …
View article: Observing comets with the upcoming CUBES near-UV spectrograph
Observing comets with the upcoming CUBES near-UV spectrograph Open
High-resolution spectroscopy of the near-UV regime provides access to a tremendous diversity of iron-peak and heavy elements in stellar spectra, is critical in extragalactic observations, such as studies of the circumgalacticmedium of dist…
View article: Coma composition and profiles of 12P/Pons-Brooks from long-slit spectroscopy
Coma composition and profiles of 12P/Pons-Brooks from long-slit spectroscopy Open
I–Introduction Comet 12P/Pons-Brooks is a Halley-type comet discovered in 1812. Returning every 71 years from just beyond the orbit of Neptune, outbursts were reported during each of its apparitions since. On its way to its most…
View article: Gas-Dust Coma Dynamics of Comet 67P/Churyumov-Gerasimenko during its 2021 Perihelion via VLT/MUSE
Gas-Dust Coma Dynamics of Comet 67P/Churyumov-Gerasimenko during its 2021 Perihelion via VLT/MUSE Open
Comet 67P/Churyumov-Gerasimenko, hereafter referred to as 67P, reached perihelion at 1.21 au on 12 November 2021. We observed  it over 15 observational epochs pre- and post-perihelion, using the Multi-Unit Spectroscopic Explorer (MUSE…