A space-based near-infrared sky survey to study the oxygen abundance in cool stars

Joice Mathew; James Gilbert; Robert Sharp; Alexey Grigoriev; Shanae King; Annino Vaccarella; David Chandler; Nicholas Herrald; Ian Price; Aurelie Magniez

doi:10.1117/12.2560898

13 December 2020 A space-based near-infrared sky survey to study the oxygen abundance in cool stars

Joice Mathew, James Gilbert, Robert Sharp, Alexey Grigoriev, Shanae King, Annino Vaccarella, David Chandler, Nicholas Herrald, Ian Price, Aurelie Magniez

Author Affiliations +

Proceedings Volume 11443, Space Telescopes and Instrumentation 2020: Optical, Infrared, and Millimeter Wave; 114430J (2020) https://doi.org/10.1117/12.2560898
Event: SPIE Astronomical Telescopes + Instrumentation, 2020, Online Only

Abstract

Cool stars, especially spectral-type M, are important probes across contemporary astrophysics, from the forma- tion history of the galaxy to the coalescence of rocky exoplanets. Main sequence M-dwarf stars are one of the most abundant stars in the galaxy, and evolved M-giant stars are some of the most distant stars that can be individually observed. The Emu sky survey, described here, will deliver critical stellar properties of these cool stars by inferring the oxygen abundance via measurement of the water band strength at 1.4 μm. A relatively wide field zenith-looking telescope with time delay integration capability can perform such a survey without active pointing but requires a fast and low-noise detector. Emu employs the paradigm-changing properties of the Leonardo SAPHIRA electron avalanche photodiode array, to provide these powerful new observations at the critical water absorption wavelength inaccessible to ground-based telescopes due to the Earth's own atmosphere. Here we will present Emu mission concept, science objectives, instrument details and simulation results.

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Joice Mathew, James Gilbert, Robert Sharp, Alexey Grigoriev, Shanae King, Annino Vaccarella, David Chandler, Nicholas Herrald, Ian Price, and Aurelie Magniez "A space-based near-infrared sky survey to study the oxygen abundance in cool stars", Proc. SPIE 11443, Space Telescopes and Instrumentation 2020: Optical, Infrared, and Millimeter Wave, 114430J (13 December 2020); https://doi.org/10.1117/12.2560898

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