Poster Open Access
W0830: an extremely cold, missing-link planetary-mass object at the low-mass end of the IMF
Bardalez Gagliuffi, Daniella;
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
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.
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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
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- Publication date:
- February 26, 2021
- DOI:
-
- Keyword(s):
- Very low mass stars Brown dwarfs Y dwarfs Hubble Space Telescope Spitzer Space Telescope Citizen Science
- Published in:
- The Astrophysical Journal: 895 pp. 11 (2).
- Meeting:
- The 20.5th Cambridge Workshop on Cool Stars, Stellar Systems, and the Sun (CS20.5), virtually anywhere, March 2-4, 2021
- Related identifiers:
- Cites
- https://ui.adsabs.harvard.edu/abs/2020ApJ...895..145B/abstract (Journal article)
- Communities:
- License (for files):
- Creative Commons Attribution 4.0 International