w0830 an extremely cold missing link planetary mass object at the low mass end of the imf

• DOI: 10.5281/zenodo.4567570
• Publication Date: 2021-02-26
• Authors: Bardalez Gagliuff...; Faherty, Jacqueline; Schneider, Adam; Meisner, Aaron; Caselden, Dan; Colin, Guillaume; Goodman, Sam; Kirkpatrick, Davy; Kuchner, Marc; Gagne, Jonathan; Logsdon, Sarah; Burgasser, Adam; Allers, Katelyn; Debes, John; Wisniewski, John; Rothermich, Austin; Andersen, Nikolaj; Thevenot, Melina; Walla, Jim
• Keywords: Y dwarfs; Brown dwarfs; Spitzer Space Telescope; Citizen Science; 13. Climate action; Very low mass stars; Hubble Space Telescope

{"references": ["Bardalez Gagliuffi et al. (2020). WISEA J083011.95+283716.0: A Missing Link Planetary-mass Object. https://ui.adsabs.harvard.edu/abs/2020ApJ...895..145B/abstract", "Cushing et al. (2011). The Discovery of Y Dwarfs using Data from the Wide-field Infrared Survey Explorer (WISE). https://ui.adsabs.harvard.edu/abs/2011ApJ...743...50C/abstract", "Meisner et al. (2020a). Expanding the Y Dwarf Census with Spitzer Follow-up of the Coldest CatWISE Solar Neighborhood Discoveries. https://ui.adsabs.harvard.edu/abs/2020ApJ...889...74M/abstract", "Luhman (2014). Discovery of a ~250 K Brown Dwarf at 2 pc from the Sun. https://ui.adsabs.harvard.edu/abs/2014ApJ...786L..18L/abstract"]}<br/>Here we present an extremely cold, planetary-mass brown dwarf which bridges the temperature gap between the warmer Y dwarf population and the coldest brown dwarf ever discovered. W0830 was identified through the Backyard Worlds: Planet 9 citizen science collaboration, which brings together over 150,000 people around the world in identifying cold, fast-moving sources through coadded WISE images. We have characterized this object with Hubble and Spitzer Space Telescope follow-up photometry. The available evidence points to a ~Y1 source at Teff ~ 350 K with a planetary mass of 4-13Mjup, as extrapolated from the known Y dwarf population. This object joins a small, yet growing sample of “missing link” objects connecting brown dwarfs to giant planets in terms of temperature.<br/>