Outputs (18)

The CARMENES search for exoplanets around M dwarfs: LP 714-47 b (TOI 442.01): populating the Neptune desert (2020)
Journal Article
Hellier. (2020). The CARMENES search for exoplanets around M dwarfs: LP 714-47 b (TOI 442.01): populating the Neptune desert. Astronomy and Astrophysics, https://doi.org/10.1051/0004-6361/202038016

We report the discovery of a Neptune-like planet (LP 714-47 b, P = 4.05204 d, mb = 30.8 ± 1.5M?, Rb = 4.7 ± 0.3 R?) located in the “hot Neptune desert”. Confirmation of the TESS Object of Interest (TOI 442.01) was achieved with radial-velocity follow... Read More about The CARMENES search for exoplanets around M dwarfs: LP 714-47 b (TOI 442.01): populating the Neptune desert.

Two Young Planetary Systems around Field Stars with Ages between 20 and 320 Myr from TESS (2020)
Journal Article
Hellier. (2020). Two Young Planetary Systems around Field Stars with Ages between 20 and 320 Myr from TESS. Astronomical Journal, 2 - 2. https://doi.org/10.3847/1538-3881/abba22

Planets around young stars trace the early evolution of planetary systems. We report the discovery and validation of two planetary systems with ages ?300 Myr from observations by the Transiting Exoplanet Survey Satellite (TESS). The Myr old G star TO... Read More about Two Young Planetary Systems around Field Stars with Ages between 20 and 320 Myr from TESS.

Orbital and physical parameters of eclipsing binaries from the ASAS catalogue – XI. CHIRON investigation of long-period binaries* (2020)
Journal Article
Hellier. (2020). Orbital and physical parameters of eclipsing binaries from the ASAS catalogue – XI. CHIRON investigation of long-period binaries*. Monthly Notices of the Royal Astronomical Society, https://doi.org/10.1093/mnras/staa3488

We present the results of a spectroscopic campaign on eclipsing binaries with long orbital period (P = 20 - 75 d) carried out with the CHIRON spectrograph. Physical and orbital solutions for seven systems were derived from the V-band, and I-band ASAS... Read More about Orbital and physical parameters of eclipsing binaries from the ASAS catalogue – XI. CHIRON investigation of long-period binaries*.

WASP-186 and WASP-187: two hot Jupiters discovered by SuperWASP and SOPHIE with additional observations by TESS (2020)
Journal Article
Smalley, Hellier, & Maxted. (2020). WASP-186 and WASP-187: two hot Jupiters discovered by SuperWASP and SOPHIE with additional observations by TESS. Monthly Notices of the Royal Astronomical Society, 428-440. https://doi.org/10.1093/mnras/staa2848

We present the discovery of two new hot Jupiters identified from the WASP survey, WASP-186b and WASP-187b (TOI-1494.01 and TOI-1493.01). Their planetary nature was established from SOPHIE spectroscopic observations, and additional photometry was obta... Read More about WASP-186 and WASP-187: two hot Jupiters discovered by SuperWASP and SOPHIE with additional observations by TESS.

The EBLM project. VII. Spin–orbit alignment for the circumbinary planet host EBLM J0608-59 A/TOI-1338 A (2020)
Journal Article
Maxted, & Hellier. (2020). The EBLM project. VII. Spin–orbit alignment for the circumbinary planet host EBLM J0608-59 A/TOI-1338 A. Monthly Notices of the Royal Astronomical Society, 1627-1633. https://doi.org/10.1093/mnras/staa2071

A dozen short-period detached binaries are known to host transiting circumbinary planets. In all circumbinary systems so far, the planetary and binary orbits are aligned within a couple of degrees. However, the obliquity of the primary star, which is... Read More about The EBLM project. VII. Spin–orbit alignment for the circumbinary planet host EBLM J0608-59 A/TOI-1338 A.

The TOI-763 system: sub-Neptunes orbiting a Sun-like star (2020)
Journal Article
Hellier. (2020). The TOI-763 system: sub-Neptunes orbiting a Sun-like star. Monthly Notices of the Royal Astronomical Society, 4503-4517. https://doi.org/10.1093/mnras/staa2502

We report the discovery of a planetary system orbiting TOI-763 (aka CD-39 7945), a V = 10.2, high proper motion G-type dwarf star that was photometrically monitored by the TESS space mission in Sector 10. We obtain and model the stellar spectrum and... Read More about The TOI-763 system: sub-Neptunes orbiting a Sun-like star.

The Multiplanet System TOI-421*: A Warm Neptune and a Super Puffy Mini-Neptune Transiting a G9 V Star in a Visual Binary* (2020)
Journal Article
Hellier. (2020). The Multiplanet System TOI-421*: A Warm Neptune and a Super Puffy Mini-Neptune Transiting a G9 V Star in a Visual Binary*. Astronomical Journal, https://doi.org/10.3847/1538-3881/aba124

We report the discovery of a warm Neptune and a hot sub-Neptune transiting TOI-421 (BD-14 1137, TIC 94986319), a bright (V = 9.9) G9 dwarf star in a visual binary system observed by the Transiting Exoplanet Survey Satellite (TESS) space mission in Se... Read More about The Multiplanet System TOI-421*: A Warm Neptune and a Super Puffy Mini-Neptune Transiting a G9 V Star in a Visual Binary*.

Discovery and characterization of the exoplanets WASP-148b and c - A transiting system with two interacting giant planets (2020)
Journal Article
Hellier, Smalley, & Maxted. (2020). Discovery and characterization of the exoplanets WASP-148b and c - A transiting system with two interacting giant planets. Astronomy and Astrophysics, https://doi.org/10.1051/0004-6361/202038296

We present the discovery and characterization of WASP-148, a new extrasolar system that includes at least two giant planets. The host star is a slowly rotating inactive late-G dwarf with a V = 12 magnitude. The planet WASP-148b is a hot Jupiter of 0.... Read More about Discovery and characterization of the exoplanets WASP-148b and c - A transiting system with two interacting giant planets.

TESS Reveals a Short-period Sub-Neptune Sibling (HD 86226c) to a Known Long-period Giant Planet (2020)
Journal Article
Hellier. (2020). TESS Reveals a Short-period Sub-Neptune Sibling (HD 86226c) to a Known Long-period Giant Planet. Astronomical Journal, https://doi.org/10.3847/1538-3881/ab9f95

The Transiting Exoplanet Survey Satellite mission was designed to find transiting planets around bright, nearby stars. Here, we present the detection and mass measurement of a small, short-period (˜4 days) transiting planet around the bright (V = 7.9... Read More about TESS Reveals a Short-period Sub-Neptune Sibling (HD 86226c) to a Known Long-period Giant Planet.

TIC 278956474: Two close binaries in one young quadruple system, identified by TESS (2020)
Journal Article
Hellier. (2020). TIC 278956474: Two close binaries in one young quadruple system, identified by TESS. Astrophysical Journal, https://doi.org/10.3847/1538-3881/ab9d20

We have identified a quadruple system with two close eclipsing binaries in TESS data. The object is unresolved in Gaia and appears as a single source at parallax 1.08~$\pm$0.01 mas. Both binaries have observable primary and secondary eclipses and wer... Read More about TIC 278956474: Two close binaries in one young quadruple system, identified by TESS.