Faith Hawthorn
A5060115781- Stellar, planetary, and galactic studies
- Astro and Planetary Science
- Astronomy and Astrophysical Research
- Astrophysics and Star Formation Studies
- Atmospheric Ozone and Climate
- Gamma-ray bursts and supernovae
- Calibration and Measurement Techniques
- History and Developments in Astronomy
- Astronomical Observations and Instrumentation
- Space Exploration and Technology
- Advanced Fiber Laser Technologies
- Photonic and Optical Devices
- Spacecraft and Cryogenic Technologies
- Geophysics and Gravity Measurements
- Semiconductor Lasers and Optical Devices
- Laser-Matter Interactions and Applications
University of Warwick
2022-2024
Hot jupiters (P < 10 d, M > 60 $\mathrm{M}_\oplus$) are almost always found alone around their stars, but four out of hundreds known have inner companion planets. These rare companions allow us to constrain the hot jupiter's formation history by ruling high-eccentricity tidal migration. Less is about Saturn-mass We report here discovery TOI-2000 system, which features a planet with smaller companion. The mini-neptune b ($2.70 \pm 0.15 \,\mathrm{R}_\oplus$, $11.0 2.4 \,\mathrm{M}_\oplus$) in...
We present the discovery of two exoplanets transiting TOI-836 (TIC 440887364) using data from TESS Sector 11 and 38. is a bright ($T = 8.5$ mag), high proper motion ($\sim\,200$ mas yr$^{-1}$), low metallicity ([Fe/H]$\approx\,-0.28$) K-dwarf with mass $0.68\pm0.05$ M$_{\odot}$ radius $0.67\pm0.01$ R$_{\odot}$. obtain photometric follow-up observations variety facilities, we use these data-sets to determine that inner planet, b, $1.70\pm0.07$ R$_{\oplus}$ super-Earth in 3.82 day orbit,...
The number of super-Earth and mini-Neptune planet discoveries has increased significantly in the last two decades thanks to transit radial velocity (RV) surveys. When it is possible apply both techniques, we can characterise internal composition exoplanets, which turn provides unique insights on their architecture, formation evolution. We performed a combined photometric RV analysis TOI-238 (TYC 6398-132-1), one short-orbit candidate announced by NASA’s TESS team. aim confirm its planetary...
Hot Jupiters generally do not have nearby planet companions, as they may cleared out other planets during their inward migration from more distant orbits. This gives evidence that hot often migrate via high-eccentricity due to dynamical interactions between rather than dynamically cool mechanisms through the protoplanetary disk. Here we further refine unique system of WASP-132 by characterizing mass recently validated 1.0-day period super-Earth WASP-132c (TOI-822.02), interior 7.1-day...
ABSTRACT To date, thousands of planets have been discovered, but there are regions the orbital parameter space that still bare. An example is short period and intermediate mass/radius known as ‘Neptunian desert’, where should be easy to find discoveries remain few. This suggests unusual formation evolution processes responsible for residing here. We present discovery TOI-332 b, a planet with an ultra-short 0.78 d sits firmly within desert. It orbits K0 dwarf effective temperature 5251 ± 71...
We report the discovery and characterisation of transiting mini-Neptune HD~207496~b (TOI-1099) as part a large programme that aims to characterise naked core planets. obtained HARPS spectroscopic observations, one ground-based transit, high-resolution imaging which we combined with TESS photometry confirm candidate its host star. The star is an active early K dwarf mass $0.80 \pm 0.04\,$M$_\odot$, radius $0.769 0.026\,$R$_\odot$, G magnitude 8. found young, $\sim 0.52\,$ Myr, allowing us...
ABSTRACT We report the discovery of a brown dwarf orbiting M1 host star. first identified within Next Generation Transit Survey data, with supporting observations found in TESS sectors 11 and 38. confirmed follow-up photometry from South African Astronomical Observatory, SPECULOOS-S, TRAPPIST-S, radial velocity measurements HARPS, which allowed us to characterize system. find an orbital period ∼1.25 d, mass $69.0^{+5.3}_{-4.8}$ MJ, close hydrogen burning limit, radius 0.95 ± 0.05 RJ....
ABSTRACT In this paper, we present observations of two high-resolution transit data sets obtained with ESPRESSO the bloated sub-Saturn planet WASP-131 b. We have simultaneous photometric NGTS and EulerCam. addition, utilized light curves from TESS, WASP, EulerCam, TRAPPIST multiple transits to fit for planetary parameters update ephemeris. spatially resolve stellar surface utilizing Reloaded Rossiter McLaughlin technique search centre-to-limb convective variations, differential rotation,...
The current architecture of a given multi-planetary system is key fingerprint its past formation and dynamical evolution history. Long-term follow-up observations are to complete their picture. In this paper we focus on the confirmation characterization components TOI-969 planetary system, where TESS detected Neptune-size planet candidate in very close-in orbit around late K-dwarf star. We use set precise radial velocity from HARPS, PFS CORALIE instruments covering more than two years...
ABSTRACT We present a study of the detection efficiency for TESS mission, focusing on yield longer period transiting exoplanets (P &gt; 25 d). created Transit Investigation and Recoverability Application (TIaRA) pipeline to use real data with injected transits create sensitivity maps which we combine occurrence rates derived from Kepler. This allows us predict exoplanet yields, will help design follow-up photometric spectroscopic programs, such as NGTS (Next Generation Survey)...
ABSTRACT Discovering transiting exoplanets with long orbital periods allows us to study warm and cool planetary systems temperatures similar the planets in our own Solar system. The Transiting Exoplanet Survey Satellite (TESS) mission has photometrically surveyed entire Southern Ecliptic Hemisphere Cycle 1 (2018 August–2019 July), 3 (2020 July–2021 June), 5 (2022 September–2023 September). We use observations from search for exoplanet that show a single transit event each year, which we call...
Discovering transiting exoplanets with relatively long orbital periods ($>$10 days) is crucial to facilitate the study of cool exoplanet atmospheres ($T_{\rm eq} < 700 K$) and understand formation inward migration further out than typical exoplanets. In order discover these longer period exoplanets, long-term photometric radial velocity campaigns are required. We report discovery TOI-2447 b ($=$ NGTS-29b), a Saturn-mass orbiting bright (T=10.0) Solar-type star (T$_{\rm eff}$=5730 K). was...
ABSTRACT We report the discovery of two exoplanets orbiting around HD 212729 (TOI 1052, TIC 317060587), a Teff = 6146 K star with V 9.51 observed by TESS in Sectors 1 and 13. One exoplanet, TOI-1052b, is Neptune-mass transits star, an additional planet TOI-1052c radial velocities but not seen to transit. confirm planetary nature TOI-1052b using precise velocity observations from HARPS determined its parameters joint RV photometry analysis. has radius $2.87^{+0.29}_{-0.24}$ R⊕, mass 16.9 ±...
ABSTRACT We report the discovery of three new hot Jupiters with Next Generation Transit Survey (NGTS) as well updated parameters for HATS-54b, which was independently discovered by NGTS. NGTS-23b, NGTS-24b, and NGTS-25b have orbital periods 4.076, 3.468, 2.823 d orbit G-, F-, K-type stars, respectively. NGTS-24 HATS-54 appear close to transitioning off main-sequence (if they are not already doing so), therefore interesting targets given observed lack around sub-giant stars. By considering...
ABSTRACT We present the discovery of an exoplanet transiting TOI-908 (TIC-350153977) using data from TESS sectors 1, 12, 13, 27, 28, and 39. is a T = 10.7 mag G-dwarf (Teff 5626 ± 61 K) solar-like star with mass 0.950 0.010 M⊙ radius 1.028 0.030 R⊙. The planet, b, 3.18 0.16 R⊕ planet in d orbit. Radial velocity measurements HARPS reveal b has approximately 16.1 4.1 M⊕, resulting bulk planetary density $2.7^{+0.2}_{-0.4}$ g cm−3. lies sparsely populated region parameter space known as Neptune...
We report the discovery of a 1.32$^{+0.10}_{-0.10}$ $\mathrm{M_{\rm Jup}}$ planet orbiting on 75.12 day period around G3V $10.8^{+2.1}_{-3.6}$ Gyr old star TOI-5542 (TIC 466206508; TYC 9086-1210-1). The was first detected by Transiting Exoplanet Survey Satellite (TESS) as single transit event in TESS Sector 13. A second observed 376 days later 27. planetary nature object has been confirmed ground-based spectroscopic and radial velocity observations from CORALIE HARPS spectrographs. third...
Discovering transiting exoplanets with long orbital periods allows us to study warm and cool planetary systems temperatures similar the planets in our own Solar system. The TESS mission has photometrically surveyed entire Southern Ecliptic Hemisphere Cycle 1 (August 2018 - July 2019), 3 (July 2020 June 2021) 5 (September 2022 September 2023). We use observations from search for exoplanet that show a single transit event each year which we call duotransits. of these planet candidates are...
We present a study of the detection efficiency for TESS mission, focusing on yield longer-period transiting exoplanets ($P > 25$ days). created Transit Investigation and Recoverability Application (TIaRA) pipeline to use real data with injected transits create sensitivity maps which we combine occurrence rates derived from Kepler. This allows us predict exoplanet yields, will help design follow-up photometric spectroscopic programs, such as NGTS Monotransit Program. For Year 1 3 SPOC FFI...
The TOI-178 system consists of a nearby late K-dwarf transited by six planets in the super-Earth to mini-Neptune regime, with radii ranging from 1.2 2.9 earth radius and orbital periods between 1.9 20.7 days. All but innermost one form chain Laplace resonances. fine-tuning fragility such configurations ensure that no significant scattering or collision event has taken place since formation migration protoplanetary disc, hence providing important anchors for planet models. We aim improve...
Context . The TOI-178 system consists of a nearby, late-K-dwarf with six transiting planets in the super-Earth to mini-Neptune regime, radii ranging from 2.9 R ⊕ and orbital periods between 1.9 20.7 days. All planets, but innermost one, form chain Laplace resonances. fine-tuning fragility such configurations ensure that no significant scattering or collision event has taken place since formation migration protoplanetary disc, thereby providing important anchors for planet models. Aims We aim...
The number of super-Earth and mini-Neptune planet discoveries has increased significantly in the last two decades thanks to transit radial velocity surveys. When it is possible apply both techniques, we can characterise internal composition exoplanets, which turn provides unique insights on their architecture, formation evolution. We performed a combined photometric analysis TOI-238 (TYC 6398-132-1), one short-orbit candidate announced by NASA's TESS team. aim confirm its planetary nature...
We report the discovery of a brown dwarf orbiting M1 host star. first identified within Next Generation Transit Survey data, with supporting observations found in TESS sectors 11 and 38. confirmed follow-up photometry from South African Astronomical Observatory, SPECULOOS-S, TRAPPIST-S, radial velocity measurements HARPS, which allowed us to characterise system. find an orbital period ~1.25 d, mass 69.0+5.3-4.8 MJ, close Hydrogen burning limit, radius 0.95 +- 0.05 RJ. determine age be >0.5...
ABSTRACT Discovering transiting exoplanets with relatively long orbital periods (&gt;10 d) is crucial to facilitate the study of cool exoplanet atmospheres (Teq &lt; 700 K) and understand formation inward migration further out than typical exoplanets. In order discover these longer period exoplanets, long-term photometric, radial velocity campaigns are required. We report discovery TOI-2447 b (=NGTS-29 b), a Saturn-mass orbiting bright (T = 10.0) Solar-type star (Teff 5730 K). was...
In the last few decades planet search surveys have been focusing on solar type stars, and only recently high-mass regimes. This is mostly due to challenges arising from lack of instrumental precision, more importantly, inherent active nature fast rotating massive stars. Here we report NGTS-33b (TOI-6442b), a super-Jupiter with mass, radius orbital period 3.6 $\pm$ 0.3 M$_{\rm jup}$, 1.64 0.07 R$_{\rm jup}$ $2.827972 \pm 0.000001$ days, respectively. The host ($0.6654 0.0006$ day) hot...
Abstract In the last few decades planet search surveys have been focusing on solar type stars, and only recently high-mass regimes. This is mostly due to challenges arising from lack of instrumental precision, more importantly, inherent active nature fast rotating massive stars. Here we report NGTS-33b (TOI-6442b), a super-Jupiter with mass, radius orbital period 3.6 ± 0.3 Mj, 1.64 0.07 Rj 2.827972 0.000001 days, respectively. The host (0.6654 0.0006 day) hot (Teff = 7437 72 K) A9V star,...