A5013911049- Astro and Planetary Science
- Planetary Science and Exploration
- Stellar, planetary, and galactic studies
- Space Exploration and Technology
- Astronomical Observations and Instrumentation
- Astronomy and Astrophysical Research
- Isotope Analysis in Ecology
- Astrophysics and Star Formation Studies
- Atmospheric Ozone and Climate
- Spectroscopy and Laser Applications
- Atmospheric and Environmental Gas Dynamics
- Solar and Space Plasma Dynamics
Institute for Space Astrophysics and Planetology
2024-2025
Sapienza University of Rome
2023-2025
National Institute for Astrophysics
2024
University of Rome Tor Vergata
2021
Abstract In this work, we analyze data from the JIRAM imaging spectrometer on board NASA mission Juno, to investigate presence of Spectrally Identifiable Ammonia Clouds (SIACs). Focusing first perijove passage, found that a white vortex structure near 40○N provides best candidate. Implementing atmospheric retrieval thanks Planetary Spectrum Generator (PSG), fit spectra (in 2.5–3.1 $\mu$m range) inside and outside vortex, varying gaseous ammonia profiles, clouds hazes properties composition....
Thermochemical models of Jupiter's troposphere predict liquid water clouds below the 4–5 bar level [1,2], with NH4SH and NH3 aerosols forming higher layers. Consequently, spectroscopic detection deeper remains sparse [3,4]. This study examines cloud-clearance areas identified using JIRAM-Juno spectra near Great Red Spot South Equatorial Belt, along their implications for planet's cloud structure.We analyzed from Juno’s first perijove in August 2016. JIRAM covers...
Jupiter, the largest planet in our solar system, serves as a crucial model for understanding giant exoplanets and their atmospheres. While its upper tropospheric chemical composition is well-known, nature structure of clouds remain elusive.  To unveil them planetary scientists rely heavily on theoretical models remote sensing data, field.Traditional models, based equilibrium cloud condensation (ECC) theory, are highly sensitive to input parameters such pressure-temperature profile...
Abstract Since the Juno spacecraft started orbiting around Jupiter in 2016, our understanding of planet has continued to expand. One mission’s primary scientific objectives was delve into mechanisms governing complex aurorae at Jupiter’s poles, leading significant progress. The Jovian InfraRed Auroral Mapper (JIRAM), on board mission and composed an imager a spectrometer, strongly contributed advancing field. Throughout mission, provided detailed monitoring auroral morphology infrared, while...
We present broad-band photometry of 30 planetary transits the ultra-hot Jupiter KELT-16b, using five medium-class telescopes. The were monitored through standard B, V, R, I filters and four simultaneously observed from different places, for a total 36 new light curves. used these photometric data those TESS space telescope to review main physical properties KELT-16 system. Our results agree with previous measurements but are more precise. estimated mid-transit times each combined them others...
Aims. Our aim in this paper is to refine the orbital and physical parameters of HATS-2 planetary system study transit timing variations atmospheric composition thanks observations that span more than 10 yr were collected using different instruments pass-band filters. We also investigate alignment by studying anomalies light curves induced starspots on photosphere parent star. Methods. analysed new events from both ground-based telescopes NASA’s TESS mission. Anomalies detected most modelled...
Our aim in this paper is to refine the orbital and physical parameters of HATS-2 planetary system study transit timing variations atmospheric composition thanks observations that span more than ten years were collected using different instruments pass-band filters. We also investigate alignment by studying anomalies light curves induced starspots on photosphere parent star. analysed new events from both ground-based telescopes NASA's TESS mission. Anomalies detected most modelled as occulted...
Last year, we showed that JunoCam images, acquired in the visible, have resolution necessary to measure height of clouds from their projected shadows. We focused our analysis on the “Nautilus”, a 3000-km cyclonic vortex seen during Juno’s 14th periojove. That structure consists mainly spiraling counter clockwise white cloud casts shadow onto reddish cloud deck∼20 30 km below. Small individual also pop out deck, towering about ~10 20...
Ammonia is historically thought to be the main source of condensable species for Jupiter's cloud layer (0.5-1 bar level). However, measurements from Galileo first [1] and Juno later [2] showed that spectral features connected ammonia clouds are rare (less than 2 % entire planetary disk) not ubiquitous. Using infrared spectra collected by JIRAM instrument on board NASA mission we investigated possible presence SIACs (spectrally identifiable clouds) in PJ1 data.As a preliminary step, used two...
We present observations of Jupiter’s atmosphere using JWST’s NIRSpec (Jakobsen+2022, doi:10.1051/0004-6361/202142663) integral field unit (IFU) spectrometer acquired during the first year scientific operations.  Near-infrared spectroscopic mapping provides a key tool for studying giant planet clouds, hazes, and gaseous composition from cloud-forming weather layer to radiatively-controlled lower stratosphere.  Spectrometers that span 1-5 µm range...
Introduction: Thermochemical models of the Jupiter troposphere foresee occurrence liquid water clouds below 4-5 bar level [1,2]. However, same also predict layers NH4SH and NH3 aerosols at higher altitudes, therefore it comes as no surprise that spectroscopic detections deeper have been so far rather sparse [3,4]. In this work we describe cloud clearance areas in Jupiter's atmosphere detected from JIRAM-Juno spectra wake Great Red Spot, South Equatorial Belt possible implications for...
ABSTRACT The Jupiter InfraRed Auroral Mapper (JIRAM) instrument onboard the Juno spacecraft performed repeated observations of Jupiter's North Equatorial Belt (NEB) around time 12th pericenter passage on 2018 April 1. data consist thermal infrared images and show, among other atmospheric features, two bright Hotspots boundary between NEB Zone. Night-time same areas at different emission angles were used to constrain trend limb-darkening function. Comparison with simulated observations,...
The Jupiter InfraRed Auroral Mapper (JIRAM) instrument on board the Juno spacecraft performed multiple observations of North Equatorial Belt (NEB) around time 12th pericenter passage April 1st 2018. data consist in thermal infrared images (the JIRAM filter has a band pass centred 4.8 μm) and show, among other atmospheric features, two bright hot-spots.Images same areas at different emission angles were used to constraint trend limb darkening function.Comparison against simulated...