Planet Hunters TESS II: results from the first two years

We’ve got some very thrilling information: our paper summarising the outcomes from the primary two years of Planet Hunters TESS has been accepted for publication! Try the paper here.

Determine 1: Half of the TESS planet candidates introduced within the Planet Hunters TESS methodology paper.

The paper outlines the ins and outs of planet Hunters TESS venture and presents 90 new planet candidates from the primary two years of the TESS mission (sectors 1 to 26). These planets wouldn’t have been discovered with out the assistance of all the citizen scientists collaborating within the Planet Hunters TESS venture. The paper features a hyperlink to a website that lists all the citizen scientists who recognized every of those 90 planet candidates talked about within the paper. This web page can be discovered here.

The bulk (81%) of the planet candidates outlined within the paper solely exhibit a single transit occasion within the TESS lightcurve, that means that they have an inclination to have longer orbital durations (the place the orbital interval corresponds to the period of a ‘yr’ on this planet) than the typical period of the planets discovered by the TESS automated algorithms. It is because automated pipelines typically require two or extra transit occasions so as to have the ability to detect the sign. Nonetheless, with visible vetting, we’re equally delicate to a single transit occasion as we’re to planets that transit a number of instances throughout the period of 1 mild curve.

You’ll be able to see that within the determine under, the place the orange and pink factors present the PHT candidates, and the blue factors present the automated pipeline discovered Tess Objects of Curiosity (TOIs). The determine highlights that the planets recognized with PHT are likely to have longer orbital durations than the TOIs, and due to this fact permitting us to check the traits of a special ‘set’ of planets, and perhaps even of planets which might be extra just like the planets inside our personal photo voltaic system.

Determine 2: Planet radius vs orbital interval for the TOIs (blue) and the one (orange circles) and multi (pink squares) transiting PHT candidates. Use the slider within the determine so as to add/take away the PHT candidates.

Despite the fact that the vast majority of the planet candidates outlined within the paper should not but confirmed planets, we’re following them up utilizing ground-based telescopes that are located world wide, together with in Australia, Chile, USA and the Canary Islands. Hopefully these observations, together with each photometric and radial velocity observations, will enable us to substantiate the planetary nature of those objects, and even derive lots for a few of them which can enable us to deduce their densities and due to this fact bulk compositions. That is ongoing work and we hope to share a few of it with you within the close to future.

Along with the 90 new planet candidates, the paper presents a few of the most attention-grabbing stellar methods which have been mentioned on the Planet Hunters TESS Speak dialogue discussion board. An instance of a possible multi stellar system is proven under.

Determine 3: An instance candidate multi-stellar system.

Multi stellar methods not solely present very attention-grabbing and fairly lightcurves, in addition they enable us to probe stellar evolution theories in additional element, as all the celebrities in a single system will need to have essentially fashioned on the identical time and out of the identical materials. This highlights a few of the different thrilling science that outcomes from Planet Hunters TESS and from the continued work of so many citizen scientists.  

Because the launch of the Planet Hunters TESS venture, virtually precisely 2 years in the past, we’ve had over 25.5 million classifications accomplished by over 25 thousand citizen scientists from across the phrase. This enormous world effort may also help us perceive what sort of planets exist inside our galaxy, how planets type and evolve over time, in addition to carry to mild a few of the different attention-grabbing and weird astrophysical phenomena that TESS noticed during the last two years.

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