333 citations · 12.2k across the 357 of their papers we have counts for
23 papers · 1 filter
HD219666b: A hot-Neptune from TESS Sector 1
M. Esposito, D. J. Armstrong, D. Gandolfi +73
We report on the confirmation and mass determination of a transiting planet orbiting the old and inactive G7 dwarf star HD219666 (Mstar = 0.92 +/- 0.03 MSun, Rstar = 1.03 +/- 0.03…
XUV Radiation from A-stars: Implications for Ultra-hot Jupiters
L. Fossati, T. Koskinen, J. D. Lothringer +3
Extremely irradiated, close-in planets to early-type stars might be prone to strong atmospheric escape. We review the literature showing that X-ray-to-optical measurements indicate…
Atmospheric mass loss from hot Jupiters irradiated by stellar superflares
D. V. Bisikalo, V. I. Shematovich, A. A. Cherenkov +2
Because of their activity, late-type stars are known to host powerful flares producing intense high-energy radiation on short time-scales that may significantly affect the atmosphe…
Overcoming the limitations of the energy-limited approximation for planet atmospheric escape
Daria Kubyshkina, Luca Fossati, Nikolay V. Erkaev +6
Studies of planetary atmospheric composition, variability, and evolution require appropriate theoretical and numerical tools to estimate key atmospheric parameters, among which the…
The spectroscopic Hertzsprung-Russell diagram of hot massive stars in the SMC
N. Castro, M. S. Oey, L. Fossati +1
We present a comprehensive stellar atmosphere analysis of 329 O- and B-type stars in the Small Magellanic Cloud (SMC) from the RIOTS4 survey. Using spectroscopically derived effect…
Elemental abundances of HD 87240, member of the young open cluster NGC 3114
V. Wellenreiter, R. Monier, L. Fossati
We have determined the abundances of several chemical elements in the atmosphere of HD 87240, a member of the young open cluster NGC 3114. We have used the code ATLAS9 to compute a…
Far-Ultraviolet Activity Levels of F, G, K, and M dwarf Exoplanet Host Stars
Kevin France, Nicole Arulanantham, Luca Fossati +4
We present a survey of far-ultraviolet (FUV; 1150 - 1450 Ang) emission line spectra from 71 planet-hosting and 33 non-planet-hosting F, G, K, and M dwarfs with the goals of charact…
A grid of upper atmosphere models for 1--40 MEARTH planets: application to CoRoT-7 b and HD219134 b,c
Daria Kubyshkina, Luca Fossati, Nicolay V. Erkaev +5
There is growing observational and theoretical evidence suggesting that atmospheric escape is a key driver of planetary evolution. Commonly, planetary evolution models employ simpl…
Characterisation of the HD 219134 multi-planet system I. Observations of stellar magnetism, wind, and high-energy flux
C. P. Folsom, L. Fossati, B. E. Wood +9
HD 219134 hosts several planets, with seven candidates reported, and the two shortest period planets are rocky (4-5 ) and transit the star. Here we present contemporane…
TESS's first planet: a super-Earth transiting the naked-eye star Mensae
D. Gandolfi, O. Barragan, J. Livingston +29
We report on the confirmation and mass determination of Pi Men c, the first transiting planet discovered by NASA's TESS space mission. Pi Men is a naked-eye (V=5.65 mag), quiet G0…
Characterisation of the HD219134 multi-planet system II. Stellar-wind sputtered exospheres in rocky planets b & c
A. A. Vidotto, H. Lichtenegger, L. Fossati +6
We present a 3D study of the formation of refractory-rich exospheres around the rocky planets HD219134b and c. These exospheres are formed by surface particles that have been sputt…
Supermassive Hot Jupiters Provide More Favourable Conditions for the Generation of Radio Emission via the Cyclotron Maser Instability - A Case Study Based on Tau Bootis b
C. Weber, N. V. Erkaev, V. A. Ivanov +5
We investigate under which conditions supermassive hot Jupiters can sustain source regions for radio emission, and whether this emission could propagate to an observer outside the…
Response to comment on "An excess of massive stars in the local 30 Doradus starburst"
F. R. N. Schneider, H. Sana, C. J. Evans +29
Farr and Mandel reanalyse our data, finding initial-mass-function slopes for high mass stars in 30 Doradus that agree with our results. However, their reanalysis appears to underpr…
CUTE Data Simulator and Reduction Pipeline
A. G. Sreejith, Luca Fossati, Manfred Steller +2
The Colorado Ultraviolet Transit Experiment (CUTE) is a 6U NASA CubeSat carrying a low-resolution (R ~3000), near-ultraviolet (255 - 330nm) spectrograph fed by a rectangular primar…
The VLT-FLAMES Tarantula Survey. XXIX. Massive star formation in the local 30 Doradus starburst
F. R. N. Schneider, O. H. Ramírez-Agudelo, F. Tramper +24
The 30 Doradus (30 Dor) nebula in the Large Magellanic Cloud (LMC) is the brightest HII region in the Local Group and a prototype starburst similar to those found in high redshift…
The influence of stellar flare on dynamical state of the atmosphere of exoplanet HD 209458b
D. V. Bisikalo, A. A. Cherenkov, V. I. Shematovich +2
By applying an one-dimensional aeronomic model of the upper atmosphere of the close-in giant planet HD 209458b, we study the reaction of the planetary atmosphere to an additional h…
The science case for POLLUX, a high-resolution UV spectropolarimeter onboard LUVOIR
Jean-Claude Bouret, Coralie Neiner, Ana I. Gómez de Castro +9
POLLUX is a high-resolution, UV spectropolarimeter proposed for the 15-meter primary mirror option of LUVOIR. The instrument Phase 0 study is supported by the French Space Agency (…
Generation of a Circumstellar Gas Disk by Hot Jupiter WASP-12b
Alex Debrecht, Jonathan Carroll-Nellenback, Adam Frank +3
Observations of transiting extra-solar planets provide rich sources of data for probing the in-system environment. In the WASP-12 system, a broad depression in the usually-bright M…
Super-Earth of 8 Mearth in a 2.2-day orbit around the K5V star K2-216
C. M. Persson, M. Fridlund, O. Barragán +35
The KESPRINT consortium identified K2-216 as a planetary candidate host star in the K2 space mission Campaign 8 field with a transiting super-Earth. The planet has recently been va…
Effective induction heating around strongly magnetized stars
K. G. Kislyakova, L. Fossati, C. P. Johnstone +4
Planets that are embedded in the changing magnetic fields of their host stars can experience significant induction heating in their interiors caused by the planet's orbital motion.…
Suppressed Far-UV Stellar Activity and Low Planetary Mass Loss in the WASP-18 System
L. Fossati, T. Koskinen, K. France +4
WASP-18 hosts a massive, very close-in Jupiter-like planet. Despite its young age (1 Gyr), the star presents an anomalously low stellar activity level: the measured logR'$_{\rm…
An excess of massive stars in the local 30 Doradus starburst
F. R. N. Schneider, H. Sana, C. J. Evans +29
The 30 Doradus star-forming region in the Large Magellanic Cloud is a nearby analogue of large star-formation events in the distant Universe. We determine the recent formation hist…
The Colorado Ultraviolet Transit Experiment (CUTE): A dedicated cubesat mission to study exoplanetary mass loss and magnetic fields
Brian T. Fleming, Kevin France, Nicholas Nell +10
The Colorado Ultraviolet Transit Experiment (CUTE) is a near-UV (2550 - 3300 Angstrom) 6U cubesat mission designed to monitor transiting hot Jupiters to quantify their atmospheric…