Abundant hydrocarbons in the disk around a very-low-mass star
Abstract
Very low-mass stars (those <0.3 solar masses) host orbiting terrestrial planets more frequently than other types of stars, but the compositions of those planets are largely unknown. We use mid-infrared spectroscopy with the James Webb Space Telescope to investigate the chemical composition of the planet-forming disk around ISO-ChaI 147, a 0.11 solar-mass star. The inner disk has a carbon-rich chemistry: we identify emission from 13 carbon-bearing molecules including ethane and benzene. We derive large column densities of hydrocarbons indicating that we probe deep into the disk. The high carbon to oxygen ratio we infer indicates radial transport of material within the disk, which we predict would affect the bulk composition of any planets forming in the disk.
Keywords
Cite
@article{arxiv.2406.14293,
title = {Abundant hydrocarbons in the disk around a very-low-mass star},
author = {A. M. Arabhavi and I. Kamp and Th. Henning and E. F. van Dishoeck and V. Christiaens and D. Gasman and A. Perrin and M. Güdel and B. Tabone and J. Kanwar and L. B. F. M. Waters and I. Pascucci and M. Samland and G. Perotti and G. Bettoni and S. L. Grant and P. O. Lagage and T. P. Ray and B. Vandenbussche and O. Absil and I. Argyriou and D. Barrado and A. Boccaletti and J. Bouwman and A. Caratti o Garatti and A. M. Glauser and F. Lahuis and M. Mueller and G. Olofsson and E. Pantin and S. Scheithauer and M. Morales-Calderón and R. Franceschi and H. Jang and N. Pawellek and D. Rodgers-Lee and J. Schreiber and K. Schwarz and M. Temmink and M. Vlasblom and G. Wright and L. Colina and G. Östlin},
journal= {arXiv preprint arXiv:2406.14293},
year = {2024}
}
Comments
Published, 36 pages, 8 figures