Year: 2024
Type: article
Abstract: As a byproduct of our search for Galactic stellar systems with gamma-ray emission, we have identified an unrelated cool and evolved star (IRC-10412) that attracted our attention due to its strong radio emission level with a spectral index matching, almost perfectly, the canonical +0.6 value expected from an ionized stellar wind. A follow-up observational analysis was undertaken given that these two properties are hard to reconcile as originating in the same stellar object. As a result, IRC-10412 has been classified as a new semiregular variable of SRb type in the asymptotic giant branch, and different but consistent estimates of its mass-loss parameter are reported. We propose that its unusually high radio emission arises from a ∼10−5 M ⊙ yr−1 stellar wind exposed to an external source of ionizing photons, possibly coming from nearby OB associations.
Source: The Astrophysical Journal
Authors: Pedro L. Luque-Escamilla, Josep Martí
Institution: Universidad de Jaén
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $4,499
Funders: National Science Foundation, National Aeronautics and Space Administration, Alfred P. Sloan Foundation, California Institute of Technology, Northwestern University, Drexel University, Space Telescope Science Institute, European Space Agency, University of Warwick, Max-Planck-Gesellschaft, Ministerio de Ciencia e Innovación, Stockholms Universitet, Jet Propulsion Laboratory, Japan Aerospace Exploration Agency, European Regional Development Fund, Agencia Estatal de Investigación
OpenAlex ID: W4402893967