Evans, A, Woodward, CE, Banerjee, DPK, Liimets, T, Djupvik, AA, Starrfield, S, Clayton, GC, Eyres, SPS, Gehrz, RD and Wagner, RM (2021) The Infrared Evolution of Dust in V838 Monocerotis. The Astronomical Journal. (In Press)

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Abstract

Luminous Red Variables (LRVs) are most likely eruptions that are the outcome of stellar mergers. V838 Mon is one of the best-studied members of this class, representing an archetype for stellar mergers resulting from B-type stars. As result of the merger event, “nova-like” eruptions occur driving mass-loss from the system. As the gas cools considerable circumstellar dust is formed. V838 Mon erupted in 2002 and is undergoing very dynamic changes in its dust composition, geometry, and infrared luminosity providing a real-time laboratory to validate mineralogical condensation sequences in stellar mergers and evolutionary scenarios. We discuss recent NASA Stratospheric Observatory for Infrared Astronomy (SOFIA) 5 to 38 µm observations combined with archival NASA Spitzer spectra that document the temporal evolution of the freshly formed (within the last <∼ 20 yrs) circumstellar material in the environs of V838 Mon. Changes in the 10 µm spectral region are strong evidence that we are witnessing a ‘classical’ dust condensation sequence expected to occur in oxygen-rich environments where alumina formation is followed by that of silicates at the temperature cools.

Item Type: Article
Additional Information: This is the accepted author manuscript (AAM). The final published version (version of record) is available online via IOP Publishing at https://iopscience.iop.org/journal/1538-3881 - please refer to any applicable terms of use of the publisher.
Subjects: Q Science > QB Astronomy > QB460 Astrophysics
Divisions: Faculty of Natural Sciences > School of Chemical and Physical Sciences
Depositing User: Symplectic
Date Deposited: 20 Aug 2021 09:33
Last Modified: 20 Aug 2021 09:37
URI: https://eprints.keele.ac.uk/id/eprint/9920

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