D. Kossakowski
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View article: TOI-199 b: A Well-characterized 100 day Transiting Warm Giant Planet with TTVs Seen from Antarctica
TOI-199 b: A Well-characterized 100 day Transiting Warm Giant Planet with TTVs Seen from Antarctica Open
We present the spectroscopic confirmation and precise mass measurement of the warm giant planet TOI-199 b. This planet was first identified in TESS photometry and confirmed using ground-based photometry from ASTEP in Antarctica including a…
View article: TOI-199 b: A well-characterized 100-day transiting warm giant planet with TTVs seen from Antarctica
TOI-199 b: A well-characterized 100-day transiting warm giant planet with TTVs seen from Antarctica Open
We present the spectroscopic confirmation and precise mass measurement of the warm giant planet TOI-199 b. This planet was first identified in TESS photometry and confirmed using ground-based photometry from ASTEP in Antarctica including a…
View article: TOI-481 b and TOI-892 b: Two Long-period Hot Jupiters from the Transiting Exoplanet Survey Satellite
TOI-481 b and TOI-892 b: Two Long-period Hot Jupiters from the Transiting Exoplanet Survey Satellite Open
We present the discovery of two new 10 day period giant planets from the Transiting Exoplanet Survey Satellite mission, whose masses were precisely determined using a wide diversity of ground-based facilities. TOI-481 b and TOI-892 b have …
View article: A nearby transiting rocky exoplanet that is suitable for atmospheric investigation
A nearby transiting rocky exoplanet that is suitable for atmospheric investigation Open
Spectroscopy of transiting exoplanets can be used to investigate their atmospheric properties and habitability. Combining radial velocity (RV) and transit data provides additional information on exoplanet physical properties. We detect a t…
View article: TOI-677b: A Warm Jupiter (P = 11.2 days) on an Eccentric Orbit Transiting a Late F-type Star
TOI-677b: A Warm Jupiter (P = 11.2 days) on an Eccentric Orbit Transiting a Late F-type Star Open
We report the discovery of TOI-677 b, first identified as a candidate in light curves obtained within Sectors 9 and 10 of the Transiting Exoplanet Survey Satellite (TESS) mission and confirmed with radial velocities. TOI-677 b has a mass o…
View article: The CARMENES search for exoplanets around M dwarfs: LP 714-47 b (TOI 442.01): Populating the Neptune desert
The CARMENES search for exoplanets around M dwarfs: LP 714-47 b (TOI 442.01): Populating the Neptune desert Open
We report the discovery of a Neptune-like planet (LP 714-47 b, P = 4.05204 d, mb = 30.8 ± 1.5Mpdbl, Rb = 4.7 ± 0.3 Rpdbl) located in the "hot Neptune desert". Confirmation of the TESS Object of Interest (TOI 442.01) was achieved with radia…
View article: The CARMENES search for exoplanets around M dwarfs
The CARMENES search for exoplanets around M dwarfs Open
We report the discovery of HN Lib b, a sub-Neptunian mass planet orbiting the nearby ( d ≈ = 6.25 pc) M4.0 V star HN Lib detected by our CARMENES radial-velocity (RV) survey. We determined a planetary minimum mass of M b sin i = 5.46 ± 0.7…
View article: The CARMENES search for exoplanets around M dwarfs. A sub-Neptunian mass planet in the habitable zone of HN Lib
The CARMENES search for exoplanets around M dwarfs. A sub-Neptunian mass planet in the habitable zone of HN Lib Open
We report the discovery of HN Lib b, a sub-Neptunian mass planet orbiting the nearby ($d \approx$ = 6.25 pc) M4.0 V star HN Lib detected by our CARMENES radial-velocity (RV) survey. We determined a planetary minimum mass of $M_\text{b}\sin…
View article: Three Long-period Transiting Giant Planets from TESS*
Three Long-period Transiting Giant Planets from TESS* Open
We report the discovery and orbital characterization of three new transiting warm giant planets. These systems were initially identified as presenting single-transit events in the light curves generated from the full-frame images of the Tr…
View article: Gaussian processes for radial velocity modeling
Gaussian processes for radial velocity modeling Open
Context. Instrumental radial velocity (RV) precision has reached a level where the detection of planetary signals is limited by the ability to understand and simultaneously model stellar astrophysical “noise.” A common method for mitigatin…
View article: Gaussian processes for radial velocity modeling Better rotation periods and planetary parameters with the quasi-periodic kernel and constrained priors
Gaussian processes for radial velocity modeling Better rotation periods and planetary parameters with the quasi-periodic kernel and constrained priors Open
In this study we present an analysis of the performance and properties of the quasi-periodic (QP) GP kernel, which is the multiplication of the squared-exponential kernel by the exponential-sine-squared kernel, based on an extensive set of…
View article: Three long period transiting giant planets from TESS
Three long period transiting giant planets from TESS Open
We report the discovery and orbital characterization of three new transiting warm giant planets. These systems were initially identified as presenting single transit events in the light curves generated from the full frame images of the Tr…
View article: TOI-2525 b and c: A pair of massive warm giant planets with a strong transit timing variations revealed by TESS
TOI-2525 b and c: A pair of massive warm giant planets with a strong transit timing variations revealed by TESS Open
TOI-2525 is a K-type star with an estimated mass of M = 0.849$_{-0.033}^{+0.024}$ M$_\odot$ and radius of R = 0.785$_{-0.007}^{+0.007}$ R$_\odot$ observed by the TESS mission in 22 sectors (within sectors 1 and 39). The TESS light curves y…
View article: The CARMENES search for exoplanets around M dwarfs
The CARMENES search for exoplanets around M dwarfs Open
We present the discovery of an Earth-mass planet ( M b sin i = 1.26 ± 0.21 M ⊕ ) on a 15.6 d orbit of a relatively nearby ( d ~ 9.6 pc) and low-mass (0.167 ± 0.011 M ⊙ ) M5.0 V star, Wolf 1069. Sitting at a separation of 0.0672 ± 0.0014 au…
View article: The CARMENES search for exoplanets around M dwarfs
The CARMENES search for exoplanets around M dwarfs Open
Context. The CARMENES instrument, installed at the 3.5 m telescope of the Calar Alto Observatory in Almería, Spain, was conceived to deliver high-accuracy radial velocity (RV) measurements with long-term stability to search for temperate r…
View article: The American Astronomical Society, find out more The Institute of Physics, find out more The following article is Open access A New Third Planet and the Dynamical Architecture of the HD 33142 Planetary System*
The American Astronomical Society, find out more The Institute of Physics, find out more The following article is Open access A New Third Planet and the Dynamical Architecture of the HD 33142 Planetary System* Open
Based on recently-taken and archival HARPS, FEROS, and HIRES radial velocities (RVs), we present evidence for a new planet orbiting the first ascent red giant star HD 33142 (with an improved mass estimate of M1.52 ± 0.03 M
\n ⊙), already k…
View article: A New Third Planet and the Dynamical Architecture of the HD 33142 Planetary System*
A New Third Planet and the Dynamical Architecture of the HD 33142 Planetary System* Open
Based on recently-taken and archival HARPS, FEROS, and HIRES radial velocities (RVs), we present evidence for a new planet orbiting the first ascent red giant star HD 33142 (with an improved mass estimate of M1.52 ± 0.03 M ⊙ ), already kno…
View article: Precise mass and radius of a transiting super-Earth planet orbiting the M dwarf TOI-1235: a planet in the radius gap?
Precise mass and radius of a transiting super-Earth planet orbiting the M dwarf TOI-1235: a planet in the radius gap? Open
© ESO 2020. We report the confirmation of a transiting planet around the bright weakly active M0.5 V star TOI-1235 (TYC 4384-1735-1, V ≈ 11.5 mag), whose transit signal was detected in the photometric time series of sectors 14, 20, and 21 …
View article: The CARMENES search for exoplanets around M dwarfs
The CARMENES search for exoplanets around M dwarfs Open
Context. A challenge with radial-velocity (RV) data is disentangling the origin of signals either due to a planetary companion or to stellar activity. In fact, the existence of a planetary companion has been proposed, as well as contested,…
View article: TOI-1468: A system of two transiting planets, a super-Earth and a mini-Neptune, on opposite sides of the radius valley
TOI-1468: A system of two transiting planets, a super-Earth and a mini-Neptune, on opposite sides of the radius valley Open
We report the discovery and characterization of two small transiting planets orbiting the bright M3.0V star TOI-1468 (LSPM J0106+1913), whose transit signals were detected in the photometric time series in three sectors of the TESS mission…
View article: Precise mass determination for the keystone sub-Neptune planet transiting the mid-type M dwarf G 9-40
Precise mass determination for the keystone sub-Neptune planet transiting the mid-type M dwarf G 9-40 Open
Context. Despite being a prominent subset of the exoplanet population discovered in the past three decades, the nature and provenance of sub-Neptune-sized planets is still one of the open questions in exoplanet science. Aims. For planets o…
View article: The HD 260655 system: Two rocky worlds transiting a bright M dwarf at 10 pc
The HD 260655 system: Two rocky worlds transiting a bright M dwarf at 10 pc Open
We report the discovery of a multiplanetary system transiting the M0 V dwarf HD 260655 (GJ 239, TOI-4599). The system consists of at least two transiting planets, namely HD 260655 b, with a period of 2.77 d, a radius of R b = 1.240 ± 0.023…
View article: A Transiting, Temperate Mini-Neptune Orbiting the M Dwarf TOI-1759 Unveiled by TESS
A Transiting, Temperate Mini-Neptune Orbiting the M Dwarf TOI-1759 Unveiled by TESS Open
We report the discovery and characterization of TOI-1759 b, a temperate (400 K) sub-Neptune-sized exoplanet orbiting the M dwarf TOI-1759 (TIC 408636441). TOI-1759 b was observed by TESS to transit in Sectors 16, 17, and 24, with only one …
View article: Discovery and mass measurement of the hot, transiting, Earth-sized planet, GJ 3929 b
Discovery and mass measurement of the hot, transiting, Earth-sized planet, GJ 3929 b Open
We report the discovery of GJ 3929 b, a hot Earth-sized planet orbiting the nearby M3.5 V dwarf star, GJ 3929 (G 180-18, TOI-2013). Joint modelling of photometric observations from TESS sectors 24 and 25 together with 73 spectroscopic obse…
View article: A nearby transiting rocky exoplanet that is suitable for atmospheric investigation
A nearby transiting rocky exoplanet that is suitable for atmospheric investigation Open
Spectroscopy of transiting exoplanets can be used to investigate their atmospheric properties and habitability. Combining radial velocity (RV) and transit data provides additional information on exoplanet physical properties. We detect a t…
View article: A Pair of Warm Giant Planets near the 2:1 Mean Motion Resonance around the K-dwarf Star TOI-2202*
A Pair of Warm Giant Planets near the 2:1 Mean Motion Resonance around the K-dwarf Star TOI-2202* Open
TOI-2202 b is a transiting warm Jovian-mass planet with an orbital period of P = 11.91 days identified from the Full Frame Images data of five different sectors of the TESS mission. Ten TESS transits of TOI-2202 b combined with three follo…
View article: TOI-1201 b: A mini-Neptune transiting a bright and moderately young M\n dwarf
TOI-1201 b: A mini-Neptune transiting a bright and moderately young M\n dwarf Open
We present the discovery of a transiting mini-Neptune around TOI-1201, a\nrelatively bright and moderately young early M dwarf ($J \\approx$ 9.5 mag,\n$\\sim$600-800 Myr) in an equal-mass $\\sim$8 arcsecond-wide binary system, using\ndata …
View article: TOI-1201 b: A mini-Neptune transiting a bright and moderately young M dwarf
TOI-1201 b: A mini-Neptune transiting a bright and moderately young M dwarf Open
We present the discovery of a transiting mini-Neptune around TOI-1201, a relatively bright and moderately young early M dwarf ( J ≈ 9.5 mag, ~600–800 Myr) in an equal-mass ~8 arcsecond-wide binary system, using data from the Transiting Exo…
View article: Small and rocky worlds orbiting M dwarfs: GJ 3473 b and GJ 3929 b
Small and rocky worlds orbiting M dwarfs: GJ 3473 b and GJ 3929 b Open
We present two small transiting planets with mass measurements orbiting bright mid M dwarfs (GJ 3473, GJ 3929). GJ 3473 b (Kemmer et al. 2020) is a hot, presumably rocky, planet (P = 1.198 d, Mb = 1.86 ± 0.30 Me, and radius, Rb = 1.264 ± 0…
View article: An ultra-short-period transiting super-Earth orbiting the M3 dwarf TOI-1685
An ultra-short-period transiting super-Earth orbiting the M3 dwarf TOI-1685 Open
Dynamical histories of planetary systems, as well as the atmospheric evolution of highly irradiated planets, can be studied by characterizing the ultra-short-period planet population, which the TESS mission is particularly well suited to d…