Spinning up a Daze: TESS Uncovers a Hot Jupiter orbiting the Rapid-Rotator TOI-778
Radial velocity
O-type main-sequence star
Orbital period
Hot Jupiter
Circular orbit
Orbit (dynamics)
DOI:
10.48550/arxiv.2212.08242
Publication Date:
2022-01-01
AUTHORS (71)
ABSTRACT
NASA's Transiting Exoplanet Survey Satellite (TESS) mission, has been uncovering a growing number of exoplanets orbiting nearby, bright stars. Most that have discovered by TESS orbit narrow-line, slow-rotating stars, facilitating the confirmation and mass determination these worlds. We present discovery hot Jupiter rapidly rotating ($v\sin{(i)}= 35.1\pm1.0$km/s) early F3V-dwarf, HD115447 (TOI-778). The transit signal taken from Sectors 10 37 TESS's initial detection exoplanet is combined with follow-up ground-based photometry velocity measurements Minerva-Australis, TRES, CORALIE CHIRON to confirm characterise TOI-778b. A joint analysis light curves radial yield mass, radius, orbital period for TOI-778b $2.76^{+0.24}_{-0.23}$Mjup, $1.370\pm0.043$Rjup $\sim4.63$ days, respectively. planet orbits ($V = 9.1$mag) F3-dwarf $M=1.40\pm0.05$Msun, $R=1.70\pm0.05$Rsun, $\log g=4.05\pm0.17$. observed spectroscopic TOI-778b, which allowed us derive sky-projected spin-orbit angle $18^{\circ}\pm11^{\circ}$, consistent an aligned planetary system. This demonstrates capability smaller aperture telescopes such as Minerva-Australis detect signals produced planets broad-line,
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