Jovian Vortex Hunter: A Citizen Science Project to Study Jupiter’s Vortices
The Planetary Science Journal American Astronomical Society 5:9 (2024) 203
Galaxy Zoo DESI: large-scale bars as a secular mechanism for triggering AGNs
Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) 532:2 (2024) 2320-2330
The effects of bar strength and kinematics on galaxy evolution: slow strong bars affect their hosts the most
(2024)
Planet Hunters TESS. V. A Planetary System Around a Binary Star, Including a Mini-Neptune in the Habitable Zone
Astronomical Journal IOP Publishing 167:5 (2024) 241
Abstract:
We report on the discovery and validation of a transiting long-period mini-Neptune orbiting a bright (V = 9.0 mag) G dwarf (TOI 4633; R = 1.05 R ⊙, M = 1.10 M ⊙). The planet was identified in data from the Transiting Exoplanet Survey Satellite by citizen scientists taking part in the Planet Hunters TESS project. Modelling of the transit events yields an orbital period of 271.9445 ± 0.0040 days and radius of 3.2 ± 0.20 R ⊕. The Earth-like orbital period and an incident flux of 1.56−0.16+0.20 F ⊕ places it in the optimistic habitable zone around the star. Doppler spectroscopy of the system allowed us to place an upper mass limit on the transiting planet and revealed a non-transiting planet candidate in the system with a period of 34.15 ± 0.15 days. Furthermore, the combination of archival data dating back to 1905 with new high angular resolution imaging revealed a stellar companion orbiting the primary star with an orbital period of around 230 yr and an eccentricity of about 0.9. The long period of the transiting planet, combined with the high eccentricity and close approach of the companion star makes this a valuable system for testing the formation and stability of planets in binary systems.Planet Hunters NGTS: New Planet Candidates from a Citizen Science Search of the Next Generation Transit Survey Public Data
Astronomical Journal IOP Publishing 167:5 (2024) 238