Backyard Worlds: Planet 9 Archives

Left: CMD of potential companion objects using WISE photometry, adopting their host’s parallax if necessary. Plotted with the sample are known ultracool dwarfs with parallaxes taken from The UltracoolSheet (Best et al. 2020), color coded by spectral type. Right: CMD of potential host objects (as blue stars) using Gaia DR3 photometry. Any suspected companions with Gaia DR3 parallaxes and astrometry are plotted as pink stars. Plotted for reference is the Gaia DR3 30 pc sample. -- astro-ph.SR

Astronomy & Telescopes, Brown Dwarfs, Citizen Science / Open Science, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report, Stellar Cartography

89 New Ultracool Dwarf Co-Moving Companions Identified With The Backyard Worlds: Planet 9 Citizen Science Project

by Keith CowingMarch 8, 2024

We report the identification of 89 new systems containing ultracool dwarf companions to main sequence stars and white dwarfs, using the citizen science project Backyard Worlds: Planet 9 and cross-reference […]

Observed SOAR/TripleSpec4.1 spectra for W0727−3607 (top), W1036−5144 (middle), and W1344−7320 (bottom), with gray lines showing the full resolution and black lines showing the spectra smoothed to the resolution of the standards and binary templates (R≈150) according to their parallax-based absolute fluxes. The left-hand column depicts the best-fitting single standards (orange line) for the spectra of the three candidates while the right-hand column shows both the binary template (orange line) and the standard spectra that compose it (purple line for primary, blue line for secondary). Reduced χ 2 ν values are reported for each of the fits. -- astro-ph.SR

Astronomy & Telescopes, Brown Dwarfs, Citizen Science / Open Science, Education and Outreach, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report

An Investigation of New Brown Dwarf Spectral Binary Candidates From the Backyard Worlds: Planet 9 Citizen Science Initiative

by Keith CowingNovember 18, 2023November 18, 2023

We present three new brown dwarf spectral binary candidates: CWISE J072708.09−360729.2, CWISE J103604.84−514424.4, and CWISE J134446.62−732053.9, discovered by citizen scientists through the Backyard Worlds: Planet 9 project.

Backyard Worlds: Planet 9

89 New Ultracool Dwarf Co-Moving Companions Identified With The Backyard Worlds: Planet 9 Citizen Science Project

An Investigation of New Brown Dwarf Spectral Binary Candidates From the Backyard Worlds: Planet 9 Citizen Science Initiative

Alien World Chemistry Found Inside A Meteorite that Struck A New Jersey Home

Exoplanet Beta Pictoris d Found After More Than 10 Years Of Searching

When Stabilizing Feedbacks Wreak Havoc In Habitable Planets: Chaos At The Freezing Point In A Four-Feedback Climate Model

Biosignature Detectability On Transiting Habitable Worlds With ELT/ANDES

Rising From The Fragments: A Multi-factorial Regulatory Framework Of DNA Damage Response In Deinococcus radiodurans