Search Publications
ALMA observations of CO isotopologues towards six obscured post-asymptotic giant branch stars
Olofsson, H.; Sahai, R.; Sánchez Contreras, C. +13 more
Context. Low- and intermediate-mass stars evolve through the asymptotic giant branch (AGB) when an efficient mass-loss process removes a significant fraction of their initial mass. For most sources, this mass-loss process relies on the interplay between convection, stellar pulsations, and dust formation. However, predicting the mass-loss history o…
The lithium-rich giant stars puzzle: New observational trends for a general-mass-loss scenario
de la Reza, R.
The existence of one percent of lithium-rich giant stars among normal, lithium-poor giant stars continues to be poorly explained. By merging two catalogues – one containing 10,535 lithium-rich giant stars with lithium abundances ranging from 1.5 to 4.9 dex, and the other detecting infrared sources – we have found 421 clump giant stars and 196 firs…
Near-ultraviolet absorption distribution of primitive asteroids from photometric surveys: II. Collisional families
Tatsumi, Eri; Vilas, Faith; de León, Julia +5 more
Context. Primitive asteroids consisting of mainly phyllosilicates and opaque minerals have great variation at near-ultraviolet (NUV) wavelengths (0.35–0.5 µm). The absorption in NUV could be indicative of phyllosilicates that reflect their formation environments such as the distribution of water, temperature, and pressure. The asteroid colli…
Insights into the origins of Phobos and Deimos based on a spectral comparison with small bodies and Martian materials
Fornasier, S.; Doressoundiram, A.; Mahlke, M. +4 more
Context. The origins of Phobos and Deimos are highly debated, and several distinct hypotheses have been put forth. The two most widely accepted theories are that (1) the two moons were created by a giant impact in analogy to the Earth-Moon system, whereby a debris disk was formed that then formed the two moons by accretion; and that (2) the moons …