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NGTS and WASP photometric recovery of a single-transit candidate from TESS | | Samuel Gill
; Daniel Bayliss
; Benjamin F. Cooke
; Peter J. Wheatley
; Louise D. Nielsen
; Monika Lendl
; James McCormac
; Edward M. Bryant
; Jack S. Acton
; David R. Anderson
; Claudia Belardi
; Francois Bouchy
; Matthew R. Burleigh
; Andrew Collier-Cameron
; Sarah L. Casewell
; Michael R. Goad
; Maximilian N. Gunther
; Coel Hellier
; James A. G.Jackman
; James S. Jenkins
; Maximiliano Moyano
; Don Pollacco
; Liam Raynard
; Alexis M. S. Smith
; Rosanna H. Tilbrook
; Oliver Turner
; Stephane Udry
; Richard G. West
; | | Date: |
11 Oct 2019 | | Abstract: | The Transiting Exoplanet Survey Satellite ( ess) produces a large number of
single-transit event candidates, since the mission monitors most stars for only
$sim$27,days. Such candidates correspond to long-period planets or eclipsing
binaries. Using the ess Sector 1 full-frame images, we identified a
7750,ppm single-transit event with a duration of 7,hours around the
moderately evolved F-dwarf star ic (Tmag=10.23, eff=6280$pm{85}$,K).
Using archival WASP photometry we constrained the true orbital period to one of
three possible values. We detected a subsequent transit-event with NGTS, which
revealed the orbital period to be 38.20,d. Radial velocity measurements from
the CORALIE Spectrograph show the secondary object has a mass of $M_2$=
$0.148pm{0.003}$,M$_{odot}$, indicating this system is an F-M eclipsing
binary. The radius of the M-dwarf companion is $R_2$ =
$0.171pm{0.003}$,R$_{odot}$, making this one of the most well characterised
stars in this mass regime. We find that its radius is 2.3-$sigma$ lower than
expected from stellar evolution models. | | Source: | arXiv, 1910.5282 | | Services: | Forum | Review | PDF | Favorites | |
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