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Backyard Worlds: Planet 9 Discovery of an Unusual Low-mass Companion to an M Dwarf at 80 pc
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Backyard Worlds: Planet 9 Discovery of an Unusual Low-mass Companion to an M Dwarf at 80 pc
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Paper
Backyard Worlds: Planet 9 Discovery of an Unusual Low-mass Companion to an M Dwarf at 80 pc
2021
Overview
We present the discovery of CWISE J203546.35-493611.0, a peculiar M8 companion to the M4.5 star APMPM J2036-4936 discovered through the citizen science project Backyard Worlds: Planet 9. Given CWISE J203546.35-493611.0's proper motion (\\(\\mu_{\\alpha}\\), \\(\\mu_{\\delta}\\)) = (\\(-\\)126\\(\\pm\\)22, \\(-\\)478\\(\\pm\\)23) and angular separation of 34.2\\(''\\) from APMPM 2036-4936, we calculate a chance alignment probability of \\(1.15 \\times 10^{-6}\\). Both stars in this system appear to be underluminous, and the spectrum obtained for CWISE J203546.35-493611.0 shows a triangular H band. Further study of this system is warranted to understand these peculiarities.
Publisher
Cornell University Library, arXiv.org
Subject
