A. Richichi
YOU?
Author Swipe
View article: Further lunar occultations results from the Trebur Observatory, 2021–24
Further lunar occultations results from the Trebur Observatory, 2021–24 Open
Following up on our initial paper (Richichi and Ohlert, 2021), we report here on 60 lunar occultation events recorded between February 2021 and March 2024 at the Michael Adrian Observatorium. An improved version of the detector was employe…
View article: Lunar occultations events from the Earth–Moon equilateral Lagrangian point: simulations and scientific potential
Lunar occultations events from the Earth–Moon equilateral Lagrangian point: simulations and scientific potential Open
Recently, a novel idea has been proposed to use a spacecraft orbiting closely around the L4 or L5 Lagrangian points of the Earth–Moon system as a vantage location for astronomical observations under unique and advantageous conditions, e.g.…
View article: First Lunar Occultation Results with the TIRCAM2 Near-Infrared Imager at the Devasthal 3.6-m Telescope
First Lunar Occultation Results with the TIRCAM2 Near-Infrared Imager at the Devasthal 3.6-m Telescope Open
TIRCAM2 is the facility near-infrared Imager at the Devasthal 3.6-m telescope in northern India, equipped with an Aladdin III InSb array detector. We have pioneered the use of TIRCAM2 for very fast photometry, with the aim of recording Lun…
View article: Further milliarcsecond resolution results on cool giants and binary stars from lunar occultations at Devashtal
Further milliarcsecond resolution results on cool giants and binary stars from lunar occultations at Devashtal Open
We report on 26 lunar occultation events observed in the context of a programme started at Devasthal in 2017. In addition to the customary observations with the 1.3-m telescope, we report here also the first attempts performed with the TIR…
View article: The Life and Times of AMBER: The VLTI’s Astronomical Multi-BEam combineR
The Life and Times of AMBER: The VLTI’s Astronomical Multi-BEam combineR Open
The sharpest images on Paranal are produced by the beam-combining instruments of the Very Large Telescope Interferometer (VLTI). Currently, the VLTI is close to completing a transitional period, moving away from the first generation of ins…
View article: Three years of ULTRASPEC at the Thai 2.4-m telescope: Capabilities and scientific highlights
Three years of ULTRASPEC at the Thai 2.4-m telescope: Capabilities and scientific highlights Open
High temporal resolution observations enable the study of rapid phenomena such as the flux varia¬tions in binary system objects, e.g. cataclysmic variables, compact binary systems, the flux variations in young star clusters, stellar occult…
View article: Further Lunar Occultations from the 2.4 m Thai National Telescope
Further Lunar Occultations from the 2.4 m Thai National Telescope Open
We present the latest lunar occultation (LO) results obtained at the 2.4 m Thai National Telescope, continuing a program started in 2014. We report on 21 LO events for 20 stellar sources, yielding 7 binary stars, 1 angular diameter, and 1 …
View article: The Structure of Chariklo’s Rings from Stellar Occultations
The Structure of Chariklo’s Rings from Stellar Occultations Open
Two narrow and dense rings (called C1R and C2R) were discovered around the Centaur object (10199) Chariklo during a stellar occultation observed on 2013 June 3. Following this discovery, we planned observations of several occultations by C…
View article: Study of the Plutino Object (208996) 2003 AZ<sub>84</sub> from Stellar Occultations: Size, Shape, and Topographic Features
Study of the Plutino Object (208996) 2003 AZ<sub>84</sub> from Stellar Occultations: Size, Shape, and Topographic Features Open
We present results derived from four stellar occultations by the plutino object (208996) 2003 AZ 84 , detected on 2011 January 8 (single-chord event), 2012 February 3 (multi-chord), 2013 December 2 (single-chord), and 2014 November 15 (mul…
View article: To be or not to be Asymmetric? VLTI/MIDI and the Mass-loss Geometry of AGB Stars
To be or not to be Asymmetric? VLTI/MIDI and the Mass-loss Geometry of AGB Stars Open
The Mid-infrared Interferometric instrument (MIDI) at the Very Large Telescope Interferometer (VLTI) has been used to spatially resolve the dust-forming region of 14 asymptotic giant branch (AGB) stars with different chemistry (O-rich and …
View article: 2003 AZ84: Size, shape, albedo and first detection of topographic features
2003 AZ84: Size, shape, albedo and first detection of topographic features Open
International audience
View article: Evidence of asymmetries in the Aldebaran photosphere from multiwavelength lunar occultations
Evidence of asymmetries in the Aldebaran photosphere from multiwavelength lunar occultations Open
We have recorded three lunar occultations of Aldebaran (AlfTau) at different\ntelescopes and using various band-passes, from the ultraviolet to the far red.\nThe data have been analyzed using both model-dependent and model-independent\nmet…
View article: A multiwavelength investigation of the H ii region S311: young stellar population and star formation
A multiwavelength investigation of the H ii region S311: young stellar population and star formation Open
We present a multiwavelength investigation of the young stellar population and star formation activities around the H ii region Sharpless 311. Using our deep near-infrared observations and archival Spitzer-IRAC observations, we have detect…
View article: A large, long-lived structure near the trojan L5 point in the post common-envelope binary SDSS J1021+1744
A large, long-lived structure near the trojan L5 point in the post common-envelope binary SDSS J1021+1744 Open
SDSS J1021+1744 is a detached, eclipsing white dwarf / M dwarf binary\ndiscovered in the Sloan Digital Sky Survey. Outside the primary eclipse, the\nlight curves of such systems are usually smooth and characterised by low-level\nvariations…
View article: Lunar Occultations of Eighteen Stellar Sources from the 2.4-m Thai National Telescope
Lunar Occultations of Eighteen Stellar Sources from the 2.4-m Thai National Telescope Open
We report further results from the program of lunar occultation (LO) observations started at the 2.4-m Thai National Telescope (TNT) in 2014. We have recorded LO events of 18 stellar sources, leading to the detection of four angular diamet…
View article: THE BIMA PROJECT: O-C DIAGRAMS OF ECLIPSING BINARY SYSTEMS
THE BIMA PROJECT: O-C DIAGRAMS OF ECLIPSING BINARY SYSTEMS Open
The Eclipsing Binaries Minima (BIMA) Monitoring Project is a CCD-based photometric observational program initiated by Bosscha Observatory - Lembang, Indonesia in June 2012. Since December 2012 the National Astronomical Research Institute o…
View article: The HU Aqr planetary system hypothesis revisited
The HU Aqr planetary system hypothesis revisited Open
We study the mid-egress eclipse timing data gathered for the cataclysmic binary HU Aquarii during the years 1993-2014. The (O-C) residuals were previously attributed to a single ~7 Jupiter mass companion in ~5 au orbit or to a stable 2-pla…