PDS 110 / HD 290380 - (Another?) Long-Period Transiting Planetary Ring from Ground-Based Photometry?

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PDS 110 / HD 290380 - (Another?) Long-Period Transiting Planetary Ring from Ground-Based Photometry?

Post by Sirius_Alpha on 25th May 2017, 5:32 pm

Periodic Eclipses of the Young Star PDS 110 Discovered with WASP and KELT Photometry

https://academic.oup.com/mnras/article-abstract/doi/10.1093/mnras/stx1249/3837821/Periodic-Eclipses-of-the-Young-Star-PDS-110?redirectedFrom=fulltext

We report the discovery of eclipses by circumstellar disc material associated with the young star PDS 110 in the Ori OB1a association using the SuperWASP and KELT surveys. PDS 110 (HD 290380, IRAS 05209-0107) is a rare Fe/Ge-type star, a ∼10 Myr-old accreting intermediate-mass star showing strong infrared excess (LIR /L bol ≃ 0.25). Two extremely similar eclipses with a depth of ~30% and duration ∼25 days were observed in November 2008 and January 2011. We interpret the eclipses as caused by the same structure with an orbital period of 808 2 days. Shearing over a single orbit rules out diffuse dust clumps as the cause, favouring the hypothesis of a companion at 2AU. The characteristics of the eclipses are consistent with transits by an unseen low-mass (1.8 − 70MJup) planet or brown dwarf with a circum-secondary disc of diameter ∼0.3 AU. The next eclipse event is predicted to take place in September 2017 and could be monitored by amateur and professional observatories across the world.

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Re: PDS 110 / HD 290380 - (Another?) Long-Period Transiting Planetary Ring from Ground-Based Photometry?

Post by Sirius_Alpha on 30th May 2017, 8:20 pm

Now on arXiv.
https://arxiv.org/abs/1705.10346

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