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Evidence for a high mutual inclination between the cold Jupiter and transiting super Earth orbiting π Men
Wyatt, Mark C.; Xuan, Jerry W.
π Men hosts a transiting super Earth (P ≈ 6.27 d, m ≈ 4.82 M⊕, R ≈ 2.04 R⊕) discovered by TESS and a cold Jupiter (P ≈ 2093 d, msin I ≈ 10.02 MJup, e ≈ 0.64) discovered from radial velocity. We use Gaia DR2 and Hipparcos astrometry to derive the star's velocity caused by the orbiting planets and constrain the cold …
MKT J170456.2-482100: the first transient discovered by MeerKAT
Heywood, I.; Wijers, R. A. M. J.; Woudt, P. A. +19 more
We report the discovery of the first transient with MeerKAT, MKT J170456.2-482100, discovered in ThunderKAT images of the low-mass X-ray binary GX339-4. MKT J170456.2-482100 is variable in the radio, reaching a maximum flux density of 0.71± 0.11 mJy on 2019 October 12, and is undetected in 15 out of 48 ThunderKAT epochs. MKT J170456.2-482100 is co…
Precision angular diameters for 16 southern stars with VLTI/PIONIER
White, Timothy R.; Casagrande, Luca; Ireland, Michael J. +2 more
In the current era of Gaia and large, high signal-to-noise stellar spectroscopic surveys, there is an unmet need for a reliable library of fundamentally calibrated stellar effective temperatures based on accurate stellar diameters. Here, we present a set of precision diameters and temperatures for a sample of 6 dwarf, 5 sub-giant, and 5 giant star…
TOI-132 b: A short-period planet in the Neptune desert transiting a V = 11.3 G-type star★
Vanderburg, Andrew; Latham, David W.; Law, Nicholas M. +49 more
The Neptune desert is a feature seen in the radius-period plane, whereby a notable dearth of short period, Neptune-like planets is found. Here, we report the Transiting Exoplanet Survey Satellite (TESS) discovery of a new short-period planet in the Neptune desert, orbiting the G-type dwarf TYC 8003-1117-1 (TOI-132). TESS photometry shows transit-l…
Mutual inclinations between giant planets and their debris discs in HD 113337 and HD 38529
Wyatt, Mark C.; Kennedy, Grant M.; Xuan, Jerry W. +1 more
HD 113337 and HD 38529 host pairs of giant planets, a debris disc, and wide M-type stellar companions. We measure the disc orientation with resolved images from Herschel and constrain the three-dimensional orbits of the outer planets with Gaia DR2 and Hipparcos astrometry. Resolved disc modelling leaves degeneracy in the disc orientation, so we de…
A new white dwarf companion around the Δµ star GJ 3346
Sozzetti, A.; D'Orazi, V.; Zurlo, A. +7 more
We present the discovery of a white dwarf companion at ∼3.6 arcsec from GJ 3346, a nearby (π ∼ 42 mas) K star observed with SPHERE@VLT as part of an open time survey for faint companions to objects with significant proper motion discrepancies (Δµ) between Gaia DR1 and Tycho-2. Syrius-like systems like GJ 3346 AB, which include a main-sequenc…
BRITE-Constellation photometry of π5 Orionis, an ellipsoidal SPB variable
Handler, G.; Wade, G. A.; Pigulski, A. +5 more
Results of an analysis of the BRITE-Constellation photometry of the SB1 system and ellipsoidal variable π5 Ori (B2 III) are presented. In addition to the orbital light-variation, which can be represented as a five-term Fourier cosine series with the frequencies forb, 2forb, 3forb, 4forb, and 6…
First speckle interferometric measurements of binary stars at the Observatorio Astrofísico Guillermo Haro
Guerrero, C. A.; Castillo, E.; Rosales-Ortega, F. F. +4 more
In this paper, we present the first multiband speckle interferometric measurements of binary stars performed using the 2.1 m telescope of the Observatorio Astrofísico Guillermo Haro, Cananea, Sonora, México. We describe here FICCO: Fast Imaging Camera for Cananea Observatory, a new instrument developed to perform speckle observations from the Nort…