4 papers
Very Large Telescope observations of interstellar comet 3I/ATLAS III: High-resolution monitoring of CN and forbidden oxygen emission across the perihelion passage with ESPRESSO
Baltasar Luco, Thomas H. Puzia, Rohan Rahatgaonkar +2
3I/ATLAS is only the third known interstellar object to traverse the Solar System. We obtained high-resolution () spectroscopy of 3I/ATLAS on 23 nights with VLT/ESP…
Pre-perihelion evolution of the NiI/FeI abundance ratio in the coma of the interstellar comet 3I/ATLAS. From extreme to normal
Damien Hutsemékers, Jean Manfroid, Emmanuël Jehin +9
Emission lines of FeI and NiI are commonly found in the coma of Solar System comets, even at large heliocentric distances. These atoms are most likely released from the surface of…
Very Large Telescope Observations of Interstellar Comet 3I/ATLAS. II. From Quiescence to Glow: Dramatic Rise of Ni i Emission and Incipient CN Outgassing at Large Heliocentric Distances*
Rohan Rahatgaonkar, Juan Pablo Carvajal, Thomas H. Puzia +25
We report VLT spectroscopy of the interstellar comet 3I/ATLAS (C/2025~N1) from to ~au using X-shooter (300--550\,nm, ) and UVES (opt…
Spectral Characteristics of Interstellar Object 3I/ATLAS from SOAR Observations
Thomas H. Puzia, Rohan Rahatgaonkar, Juan Pablo Carvajal +2
Interstellar objects (ISOs) provide unique insights into the building blocks and conditions of extrasolar planetary systems. The newly discovered object, 3I/ATLAS (C/2025 N1), repr…