252 citations · 1.2k across the 31 of their papers we have counts for
33 papers
WALTzER: Wide-band Atmospheric Laboratory for Transiting Exoplanet Research
A. G. Sreejith, L. Fossati, M. Lendl +81
Understanding the origin and evolution of planetary atmospheres, and the connection between their lower and upper atmospheric layers, remains a fundamental challenge in exoplanet s…
Self-consistent 1D modelling of Jupiter's upper atmosphere as an exoplanet analogue
Nils-Martin Robeling, Sudeshna Boro Saikia, Gwenaëlle Van Looveren +5
Jupiter's upper atmosphere provides a real-world laboratory for validating first-principles models of giant gaseous exoplanets and for constraining the key physical processes that…
Spectropolarimetric characterisation of exoplanet host stars in preparation of the mission II. The magnetised wind environment of TOI-1860, DS Tuc A, and HD 63433
S. Bellotti, A. Lavail, D. Evensberget +10
We update the status of the spectropolarimetric campaign dedicated to characterise the magnetic field properties of a sample of known exoplanet-hosting stars included in the curren…
Knobs and dials of retrieving JWST transmission spectra. II. Impacts of pipeline-level differences on retrieval posteriors
Simon Schleich, Sudeshna Boro Saikia, Quentin Changeat +3
Since the launch of JWST, observations of exoplanetary atmospheres have seen a revolution in data quality. Given that atmospheric parameter inferences depend heavily on the underly…
The magnetic and spin-down properties of slowly rotating fully convective M dwarfs
Victor See, Louis Amard, Stefano Bellotti +19
The evolution of the magnetism, winds and rotation of low-mass stars are all linked. One of the most common ways to probe the magnetic properties of low-mass stars is with the Zeem…
Evolving magnetic lives of Sun-like stars. I. Characterisation of the large-scale magnetic field with Zeeman-Doppler imaging
S. Bellotti, T. Lueftinger, S. Boro Saikia +6
Planets orbiting young, solar-type stars are embedded in a more energetic environment than that of the solar neighbourhood. They experience harsher conditions due to enhanced stell…
High-resolution Ultraviolet-to-nearinfrared Characterization of Exoplanet Atmospheres
Patricio E. Cubillos, Matteo Brogi, Antonio García Muñoz +19
The Habitable Worlds Observatory (HWO) offers a unique opportunity to revolutionize our understanding of planetary formation and evolution. The goal of this Science Case Developmen…
The PLATO Mission
Heike Rauer, Conny Aerts, Juan Cabrera +842
PLATO (PLAnetary Transits and Oscillations of stars) is ESA's M3 mission designed to detect and characterise extrasolar planets and perform asteroseismic monitoring of a large numb…
Spectropolarimetric characterisation of exoplanet host stars in preparation of the Ariel mission. Magnetic environment of HD 63433
S. Bellotti, D. Evensberget, A. A. Vidotto +8
The accurate characterisation of the stellar magnetism of planetary host stars has been gaining momentum, especially in the context of transmission spectroscopy investigations of e…
X-ray detection of astrospheres around three main-sequence stars and their mass-loss rates
K. G. Kislyakova, M. Güdel, D. Koutroumpa +3
Stellar winds of cool main sequence stars are very difficult to constrain observationally. One way to measure stellar mass loss rates is to detect soft X-ray emission from stellar…
Airy worlds or barren rocks? On the survivability of secondary atmospheres around the TRAPPIST-1 planets
Gwenaël Van Looveren, Manuel Güdel, Sudeshna Boro Saikia +1
In this work we aim to determine the atmospheric survivability of the TRAPPIST-1 planets by modelling the response of the upper atmosphere to incoming stellar high-energy radiation…
Non-thermal motions and atmospheric heating of cool stars
S. Boro Saikia, T. Lueftinger, V. S. Airapetian +6
The magnetic processes associated with the non-thermal broadening of optically thin emission lines appear to carry enough energy to heat the corona and accelerate the solar wind. W…
NIRwave: A wave-turbulence-driven solar wind model constrained by PSP observations
Simon Schleich, Sudeshna Boro Saikia, Udo Ziegler +2
We generate a model description of the solar wind based on an explicit wave-turbulence-driven heating mechanism, and constrain our model with observational data. We included an exp…
Absolute Ca II H & K and H-alpha flux measurements of low-mass stars: Extending to M dwarfs
C. J. Marvin, A. Reiners, G. Anglada-Escudé +2
Context: With the recent surge of planetary surveys focusing on detecting Earth-mass planets around M dwarfs, it is becoming more important to understand chromospheric activity in…
Linking chromospheric activity and magnetic field properties for late-type dwarf stars
E. L. Brown, S. V. Jeffers, S. C. Marsden +9
Spectropolarimetric data allow for simultaneous monitoring of stellar chromospheric activity and the surface-averaged longitudinal magnetic field, $B_l…
Deep-SWIM: A few-shot learning approach to classify Solar WInd Magnetic field structures
Hala Lamdouar, Sairam Sundaresan, Anna Jungbluth +9
The solar wind consists of charged particles ejected from the Sun into interplanetary space and towards Earth. Understanding the magnetic field of the solar wind is crucial for pre…
The crucial role of surface magnetic fields for stellar dynamos: Epsilon Eridani, 61 Cygni A, and the Sun
S. V. Jeffers, R. H. Cameron, S. C. Marsden +9
Cool main-sequence stars, such as the Sun, have magnetic fields which are generated by an internal dynamo mechanism. In the Sun, the dynamo mechanism produces a balance between the…
Time evolution of magnetic activity cycles in young suns: The curious case of kappa Ceti
S. Boro Saikia, T. Lueftinger, C. P. Folsom +15
A detailed investigation of the magnetic properties of young Sun-like stars can provide valuable information on our Sun's magnetic past and its impact on the early Earth. We determ…
The impact of unresolved magnetic spots on high precision radial velocity measurements
Maksym Lisogorskyi, Sudeshna Boro Saikia, Sandra V. Jeffers +6
The Doppler method of exoplanet detection has been extremely successful, but suffers from contaminating noise from stellar activity. In this work a model of a rotating star with a…
Do non-dipolar magnetic fields contribute to spin-down torques?
Victor See, Sean P. Matt, Adam J. Finley +14
Main sequence low-mass stars are known to spin-down as a consequence of their magnetised stellar winds. However, estimating the precise rate of this spin-down is an open problem. T…
Detecting volcanically produced tori along orbits of exoplanets using UV spectroscopy
Kristina G. Kislyakova, Luca Fossati, Denis Shulyak +17
We suggest to use the Hubble Space Telescople (HST) follow-up observations of the TESS targets for detecting possible plasma tori along the orbits of exoplanets orbiting M dwarfs.…
Reconstructing Extreme Space Weather from Planet Hosting Stars
V. S. Airapetian, V. Adibekyan, M. Ansdell +80
The field of exoplanetary science is making rapid progress both in statistical studies of exoplanet properties as well as in individual characterization. As space missions provide…
Estimating magnetic filling factors from Zeeman-Doppler magnetograms
Victor See, Sean P. Matt, Colin P. Folsom +15
Low-mass stars are known to have magnetic fields that are believed to be of dynamo origin. Two complementary techniques are principally used to characterise them. Zeeman-Doppler im…
Direct evidence of a full dipole flip during the magnetic cycle of a sun-like star
S. Boro Saikia, T. Lueftinger, S. V Jeffers +9
The behaviour of the large-scale dipolar field, during a star's magnetic cycle, can provide valuable insight into the stellar dynamo and associated magnetic field manifestations su…