130 citations · 1.1k across the 26 of their papers we have counts for
23 papers
Precise mass and radius of a transiting super-Earth planet orbiting the M dwarf TOI-1235: a planet in the radius gap?
P. Bluhm, R. Luque, N. Espinoza +78
We report the confirmation of a transiting planet around the bright, inactive M0.5 V star TOI-1235 (TYC 4384-1735-1, V = 11.5 mag), whose transit signal was detected in the photome…
A giant exoplanet orbiting a very low-mass star challenges planet formation models
J. C. Morales, A. J. Mustill, I. Ribas +179
Statistical analyses from exoplanet surveys around low-mass stars indicate that super-Earth and Neptune-mass planets are more frequent than gas giants around such stars, in agreeme…
Planetary system around the nearby M dwarf GJ 357 including a transiting, hot, Earth-sized planet optimal for atmospheric characterization
R. Luque, E. Pallé, D. Kossakowski +73
We report the detection of a transiting Earth-size planet around GJ 357, a nearby M2.5V star, using data from the Transiting Exoplanet Survey Satellite (TESS). GJ 357 b (TOI-562.01…
The Penn State - Toruń Centre for Astronomy Planet Search stars IV. Dwarfs and the complete sample
B. Deka-Szymankiewicz, A. Niedzielski, M. Adamczyk +3
Our knowledge of the intrinsic parameters of exoplanets is as precise as our determinations of their stellar hosts parameters. In the case of radial velocity searches for planets,…
Tracking Advanced Planetary Systems (TAPAS) with HARPS-N. V.: A Massive Jupiter orbiting the very low metallicity giant star BD+03 2562 and a possible planet around HD~103485
E. Villaver, A. Niedzielski, A. Wolszczan +6
We present two evolved stars from the TAPAS (Tracking Advanced PlAnetary Systems) with HARPS-N project devoted to RV precision measurements of identified candidates within the Penn…
TAPAS IV. TYC 3667-1280-1 b - the most massive red giant star hosting a warm Jupiter
A. Niedzielski, E. Villaver, G. Nowak +6
We present the latest result of the TAPAS project that is devoted to intense monitoring of planetary candidates that are identified within the PennState-Toruń planet search. We aim…
Tracking Advanced Planetary Systems (TAPAS) with HARPS-N. III. HD 5583 and BD+15 2375 - two cool giants with warm companions
A. Niedzielski, E. Villaver, G. Nowak +6
Evolved stars are crucial pieces to understand the dependency of the planet formation mechanism on the stellar mass and to explore deeper the mechanism involved in star-planet inte…
The Penn State - Toruń Centre for Astronomy Planet Search stars. III. The evolved stars sample
A. Niedzielski, B. Deka-Szymankiewicz, M. Adamczyk +3
We present basic atmospheric parameters (, , and [Fe/H]), rotation velocities and absolute radial velocities as well as luminosities, masses, ages and radii…
TAPAS - Tracking Advanced Planetary Systems with HARPS-N. II. Super Li-rich giant HD 107028
M. Adamow, A. Niedzielski, E. Villaver +5
Lithium rich giant stars are rare objects. For some of them, Li enrichment exceeds abundance of this element found in solar system meteorites, suggesting that these stars have gone…
Three red giants with substellar-mass companions
A. Niedzielski, A. Wolszczan, G. Nowak +5
We present three giant stars from the ongoing Penn State-Toruń Planet Search with the Hobby-Eberly Telescope, which exhibit radial velocity variations that point to a presence of p…
On the GJ 436 planetary system
G. Maciejewski, A. Niedzielski, G. Nowak +4
The GJ 436 system contains a transiting planet GJ 436 b which is a hot analogue of Neptune on an eccentric orbit. Recently, two additional transiting sub-Earth planets have been po…
The HU Aqr planetary system hypothesis revisited
K. Gozdziewski, A. Slowikowska, D. Dimitrov +11
We study the mid-egress eclipse timing data gathered for the cataclysmic binary HU Aquarii during the years 1993-2014. The (O-C) residuals were previously attributed to a single ~7…
Tracking Advanced Planetary Systems with HARPS-N (TAPAS). I. A multiple planetary system around the red giant star TYC 1422-614-1
A. Niedzielski, E. Villaver, A. Wolszczan +7
Context. Stars that have evolved-off the Main Sequence are crucial in expanding the frontiers of knowledge on exoplanets toward higher stellar masses, and to constrain star-planet…
The Penn State - Torun Centre for Astronomy Planet Search stars. II. Lithium abundance analysis of the Red Giant Clump sample
M. Adamow, A. Niedzielski, E. Villaver +2
Using the sample of 348 stars from the PennState-Torun Centre for Astronomy Planet Search, for which uniformly determined atmospheric parameters are available, with chemical abunda…
Investigation of a transiting planet candidate in Trumpler 37: an astrophysical false positive eclipsing spectroscopic binary star
R. Errmann, G. Torres, T. O. B. Schmidt +50
We report our investigation of the first transiting planet candidate from the YETI project in the young (~4 Myr old) open cluster Trumpler 37. The transit-like signal detected in t…
Constraints on a second planet in the WASP-3 system
G. Maciejewski, A. Niedzielski, A. Wolszczan +30
There have been previous hints that the transiting planet WASP-3 b is accompanied by a second planet in a nearby orbit, based on small deviations from strict periodicity of the obs…
Multi-site campaign for transit timing variations of WASP-12 b: possible detection of a long-period signal of planetary origin
G. Maciejewski, D. Dimitrov, M. Seeliger +38
The transiting planet WASP-12 b was identified as a potential target for transit timing studies because a departure from a linear ephemeris was reported in the literature. Such dev…
Planets Around the K-Giants BD+20 274 and HD 219415
S. Gettel, A. Wolszczan, A. Niedzielski +4
We present the discovery of planet-mass companions to two giant stars by the ongoing Penn State- Toruń Planet Search (PTPS) conducted with the 9.2 m Hobby-Eberly Telescope. The les…
The Penn State-Torun Centre for Astronomy Planet Search stars. I. Spectroscopic analysis of 348 red giants
P. Zielinski, A. Niedzielski, A. Wolszczan +2
We present basic atmospheric parameters (Teff, logg, vt and [Fe/H]) as well as luminosities, masses, radii and absolute radial velocities for 348 stars, presumably giants, from the…
BD+48 740 - Li overabundant giant star with a planet. A case of recent engulfment?
M. Adamów, A. Niedzielski, E. Villaver +2
We report the discovery of a unique object, BD+48 740, a lithium overabundant giant with A(Li)=2.33 +/- 0.04 (where A(Li) = log(n_Li/n_H) + 12), that exhibits radial velocity (RV)…
Substellar-Mass Companions to the K-Giants HD 240237, BD +48 738 and HD 96127
S. Gettel, A. Wolszczan, A. Niedzielski +4
We present the discovery of substellar-mass companions to three giant stars by the ongoing Penn State-Toruń Planet Search (PTPS) conducted with the 9.2 m Hobby-Eberly Telescope. Th…
The Penn State - Toruń Planet Search: target characteristics and recent results
P. Zieliński, A. Niedzielski, A. Wolszczan +3
More than 450 stars hosting planets are known today but only approximately 30 planetary systems were discovered around stars beyond the Main Sequence. The Penn State-Toruń Planet S…
A Planet in a 0.6-AU Orbit Around the K0 Giant HD 102272
A. Niedzielski, K. Go\' zdziewski, A. Wolszczan +3
We report the discovery of one or more planet-mass companions to the K0-giant HD 102272 with the Hobby-Eberly Telescope. In the absence of any correlation of the observed periodici…