Philipp Eigmüller
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View article: NGTS-31b and NGTS-32b: two inflated hot Jupiters orbiting subgiant stars
NGTS-31b and NGTS-32b: two inflated hot Jupiters orbiting subgiant stars Open
We present the discoveries of NGTS-31b(= TOI-2721), and NGTS-32b, two hot Jupiters from the Next Generation Transit Survey (NGTS) transiting slightly evolved stars. The orbital periods, radii, and masses are 4.16 and 3.31 d, 1.61 and 1.42 …
View article: The planetary transit and oscillations (PLATO) mission status: flight model build and initial ground testing
The planetary transit and oscillations (PLATO) mission status: flight model build and initial ground testing Open
Alvarez, Jose Lorenzo et al.-- Full list of authors: Alvarez, Jose Lorenzo; Walloschek, Thomas; Heras, Ana; Aroca, José; Boenke, Tobias; Boquet, Fabrice; Casagrande, Claudio; De Biasi, Emanuelle; Deep, Atul; Galbiati, Andrea; Giana, Edoard…
View article: TOI-2447 b / NGTS-29 b: a 69-day Saturn around a Solar analogue
TOI-2447 b / NGTS-29 b: a 69-day Saturn around a Solar analogue Open
Discovering transiting exoplanets with relatively long orbital periods (>10 d) is crucial to facilitate the study of cool exoplanet atmospheres (Teq < 700 K) and to understand exoplanet formation and inward migration further out than…
View article: TOI-2447 b / NGTS-29 b: a 69-day Saturn around a Solar analogue
TOI-2447 b / NGTS-29 b: a 69-day Saturn around a Solar analogue Open
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 to understand exoplanet formation and inward migration further …
View article: NGTS-28Ab: a short period transiting brown dwarf
NGTS-28Ab: a short period transiting brown dwarf Open
We report the discovery of a brown dwarf orbiting a M1 host star. We first identified the brown dwarf within the Next Generation Transit Survey data, with supporting observations found in TESS sectors 11 and 38. We confirmed the discovery …
View article: NGTS-28Ab: A short period transiting brown dwarf
NGTS-28Ab: A short period transiting brown dwarf Open
We report the discovery of a brown dwarf orbiting a M1 host star. We first identified the brown dwarf within the Next Generation Transit Survey data, with supporting observations found in TESS sectors 11 and 38. We confirmed the discovery …
View article: NGTS discovery of a highly inflated Saturn-mass planet and a highly irradiated hot Jupiter
NGTS discovery of a highly inflated Saturn-mass planet and a highly irradiated hot Jupiter Open
We report the discovery of two new transiting giant exoplanets NGTS-26 b and NGTS-27 b by the Next Generation Transit Survey (NGTS). NGTS-26 b orbits around a G6-type main sequence star every 4.52 days. It has a mass of 0.29 -0.06 +0.07 M …
View article: <i>TESS</i> duotransit candidates from the Southern Ecliptic Hemisphere
<i>TESS</i> duotransit candidates from the Southern Ecliptic Hemisphere Open
Discovering transiting exoplanets with long orbital periods allows us to study warm and cool planetary systems with temperatures similar to the planets in our own Solar system. The Transiting Exoplanet Survey Satellite (TESS) mission has p…
View article: TESS Duotransit Candidates from the Southern Ecliptic Hemisphere
TESS Duotransit Candidates from the Southern Ecliptic Hemisphere Open
Discovering transiting exoplanets with long orbital periods allows us to study warm and cool planetary systems with temperatures similar to the planets in our own Solar system. The TESS mission has photometrically surveyed the entire South…
View article: K2-99: A subgiant hosting a transiting warm Jupiter in an eccentric orbit and a long-period companion
K2-99: A subgiant hosting a transiting warm Jupiter in an eccentric orbit and a long-period companion Open
We report the discovery from K2 of a transiting planet in an 18.25-d, eccentric (0.19 ± 0.04) orbit around K2-99, an 11th magnitude subgiant in Virgo. We con- firm the planetary nature of the companion with radial velocities, and determine…
View article: TOI-836: A super-Earth and mini-Neptune transiting a nearby K-dwarf
TOI-836: A super-Earth and mini-Neptune transiting a nearby K-dwarf Open
We present the discovery of two exoplanets transiting TOI-836 (TIC 440887364) using data from TESS Sector 11 and Sector 38. TOI-836 is a bright (T = 8.5 mag), high proper motion (∼200 mas yr−1), low metallicity ([Fe/H]≈−0.28) K-dwarf with …
View article: NGTS-21b: an inflated Super-Jupiter orbiting a metal-poor K dwarf
NGTS-21b: an inflated Super-Jupiter orbiting a metal-poor K dwarf Open
We report the discovery of NGTS-21b , a massive hot Jupiter orbiting a low-mass star as part of the Next Generation Transit Survey (NGTS). The planet has a mass and radius of 2.36 ± 0.21 MJ and 1.33 ± 0.03 RJ, and an orbital period of 1.54…
View article: NGTS-21b: An Inflated Super-Jupiter Orbiting a Metal-poor K dwarf
NGTS-21b: An Inflated Super-Jupiter Orbiting a Metal-poor K dwarf Open
We report the discovery of NGTS-21b, a massive hot Jupiter orbiting a low-mass star as part of the Next Generation Transit Survey (NGTS). The planet has a mass and radius of $2.36 \pm 0.21$ M$_{\rm J}$, and $1.33 \pm 0.03$ R$_{\rm J}$, and…
View article: An old warm Jupiter orbiting the metal-poor G-dwarf TOI-5542
An old warm Jupiter orbiting the metal-poor G-dwarf TOI-5542 Open
We report the discovery of a 1.32 −0.10 +0.10 M Jup planet orbiting on a 75.12 day period around the G3V 10.8 −3.6 +2.1 Gyr old star TOI-5542 (TIC 466206508; TYC 9086-1210-1). The planet was first detected by the Transiting Exoplanet Surve…
View article: An old warm Jupiter orbiting the metal-poor G-dwarf TOI-5542
An old warm Jupiter orbiting the metal-poor G-dwarf TOI-5542 Open
We report the discovery of a 1.32$^{+0.10}_{-0.10}$ $\mathrm{M_{\rm Jup}}$ planet orbiting on a 75.12 day period around the G3V $10.8^{+2.1}_{-3.6}$ Gyr old star TOI-5542 (TIC 466206508; TYC 9086-1210-1). The planet was first detected by t…
View article: TOI-836: A super-Earth and mini-Neptune transiting a nearby K-dwarf
TOI-836: A super-Earth and mini-Neptune transiting a nearby K-dwarf Open
We present the discovery of two exoplanets transiting TOI-836 (TIC 440887364) using data from TESS Sector 11 and Sector 38. TOI-836 is a bright ($T = 8.5$ mag), high proper motion ($\sim\,200$ mas yr$^{-1}$), low metallicity ([Fe/H]$\appro…
View article: Two long-period transiting exoplanets on eccentric orbits: NGTS-20 b (TOI-5152 b) and TOI-5153 b
Two long-period transiting exoplanets on eccentric orbits: NGTS-20 b (TOI-5152 b) and TOI-5153 b Open
Context. Long-period transiting planets provide the opportunity to better understand the formation and evolution of planetary systems. Their atmospheric properties remain largely unaltered by tidal or radiative effects of the host star, an…
View article: Two long-period transiting exoplanets on eccentric orbits: NGTS-20 b (TOI-5152 b) and TOI-5153 b
Two long-period transiting exoplanets on eccentric orbits: NGTS-20 b (TOI-5152 b) and TOI-5153 b Open
Long-period transiting planets provide the opportunity to better understand the formation and evolution of planetary systems. Their atmospheric properties remain largely unaltered by tidal or radiative effects of the host star, and their o…
View article: A Close-in Puffy Neptune with Hidden Friends: The Enigma of TOI 620
A Close-in Puffy Neptune with Hidden Friends: The Enigma of TOI 620 Open
We present the validation of a transiting low-density exoplanet orbiting the M2.5 dwarf TOI 620 discovered by the NASA Transiting Exoplanet Survey Satellite (TESS) mission. We utilize photometric data from both TESS and ground-based follow…
View article: Periodic stellar variability from almost a million NGTS light curves
Periodic stellar variability from almost a million NGTS light curves Open
We analyse 829 481 stars from the Next Generation Transit Survey (NGTS) to extract variability periods. We utilize a generalization of the autocorrelation function (the G-ACF), which applies to irregularly sampled time series data. We extr…
View article: TIC-320687387 B: a long-period eclipsing M-dwarf close to the hydrogen burning limit
TIC-320687387 B: a long-period eclipsing M-dwarf close to the hydrogen burning limit Open
We are using precise radial velocities from CORALIE together with precision photometry from the Next Generation Transit Survey (NGTS) to follow-up stars with single-transit events detected with the Transiting Exoplanet Survey Satellite (TE…
View article: TIC-320687387 B: a long-period eclipsing M-dwarf close to the hydrogen burning limit
TIC-320687387 B: a long-period eclipsing M-dwarf close to the hydrogen burning limit Open
We are using precise radial velocities from CORALIE together with precision photometry from the Next Generation Transit Survey (NGTS) to follow-up stars with single-transit events detected with the Transiting Exoplanet Survey Satellite (TE…
View article: GJ 367b: A dense, ultrashort-period sub-Earth planet transiting a nearby red dwarf star
GJ 367b: A dense, ultrashort-period sub-Earth planet transiting a nearby red dwarf star Open
A nearby iron-rich sub-Earth planet The mass and radius of an exoplanet determine its mean density, which provides information about the possible interior structure. Lam et al . have identified a planet on a 7.7-hour orbit around a nearby …
View article: NGTS-19b: a high-mass transiting brown dwarf in a 17-d eccentric orbit
NGTS-19b: a high-mass transiting brown dwarf in a 17-d eccentric orbit Open
We present the discovery of NGTS-19b, a high-mass transiting brown dwarf discovered by the Next Generation Transit Survey. We investigate the system using follow-up photometry from the South African Astronomical Observatory, as well as sec…
View article: A transit timing variation observed for the long-period extremely low-density exoplanet HIP 41378 f
A transit timing variation observed for the long-period extremely low-density exoplanet HIP 41378 f Open
HIP 41378 f is a temperate 9.2 ± 0.1 R⊕ planet with period of 542.08 d and an extremely low density of 0.09 ± 0.02 g cm−3. It transits the bright star HIP 41378 (V = 8.93), making it an exciting target for atmospheric characterization incl…
View article: NGTS 15b, 16b, 17b, and 18b: four hot Jupiters from the Next-Generation Transit Survey
NGTS 15b, 16b, 17b, and 18b: four hot Jupiters from the Next-Generation Transit Survey Open
We report the discovery of four new hot Jupiters with the Next-Generation Transit Survey (NGTS). NGTS-15b, NGTS-16b, NGTS-17b, and NGTS-18b are short-period (P < 5 d) planets orbiting G-type main-sequence stars, with radii and masses be…
View article: NGTS and <i>HST</i> insights into the long-period modulation in GW Librae
NGTS and <i>HST</i> insights into the long-period modulation in GW Librae Open
Light curves of the accreting white dwarf pulsator GW Librae spanning a 7.5-month period in 2017 were obtained as part of the Next-Generation Transit Survey. This data set comprises 787 h of photometry from 148 clear nights, allowing the b…
View article: NGTS-12b: A sub-Saturn mass transiting exoplanet in a 7.53 day orbit
NGTS-12b: A sub-Saturn mass transiting exoplanet in a 7.53 day orbit Open
We report the discovery of the transiting exoplanet NGTS-12b by the Next Generation Transit Survey (NGTS). The host star, NGTS-12, is a V = 12.38 mag star with an effective temperature of Teff = 5690 ± 130 K. NGTS-12b orbits with a period …