Carina Persson
Carina's research topic is exoplanets - planets orbiting other stars - and she is the head of Chalmers Exoplanet Group (CEG). Although thousands of exoplanets have been discovered since 1995, no Earth-like habitable planet or any exoplanet system like our own has been found. The major discovery has instead been the diversity of exoplanets. Completely new types of planets that do not exist in our own system have been discovered, for instance super-Earths and mini-Neptunes.
Both Europe and the U.S. have invested heavily in new dedicated exoplanet space missions: The TESS and CHEOPS spacecrafts measures with ultra-high precision the tiny dips in the visible light of stars that occurs when an exoplanet passes in front of its star. In this way new planets and their occurence can be detected and a lot of additional information can be found by analysing the light curves for instance planet sizes. To further characterise the exoplanets, these observations are combined with follow-up observations from ground-based observatories that measures stellar radial velocities which gives information of the planet masses. When both mass and radius have been obtained, the bulk density can be determined and used for a first examination of the composition of the planet.
Carina and CEG are also working with preparations for the launch of the European space mission PLATO in 2026. The goal of that spacecraft is to determine the occurence of different types of planets and system and to find out how common our own planet system and the Earth are.
Showing 130 publications
Diversities and similarities exhibited by multi-planetary systems and their architectures
JWST reveals the rapid and strong day-side variability of 55 Cancri e
TOI-544 b: a potential water-world inside the radius valley in a two-planet system
Planets observed with CHEOPS: Two super-Earths orbiting the red dwarf star TOI-776
Five new eclipsing binaries with low-mass companions
TOI-1130: A photodynamical analysis of a hot Jupiter in resonance with an inner low-mass planet
Connecting photometric and spectroscopic granulation signals with CHEOPS and ESPRESSO
TOI-1416: A system with a super-Earth planet with a 1.07 d period
TOI-969: a late-K dwarf with a hot mini-Neptune in the desert and an eccentric cold Jupiter
TOI-733 b: A planet in the small-planet radius valley orbiting a Sun-like star
Discovery of TOI-1260d and the characterization of the multiplanet system
TOI-5678b: A 48-day transiting Neptune-mass planet characterized with CHEOPS and HARPS
A puffy polar planet The low density, hot Jupiter TOI-640 b is on a polar orbit
TESS and CHEOPS discover two warm sub-Neptunes transiting the bright K-dwarf HD 15906
A low-eccentricity migration pathway for a 13-h-period Earth analogue in a four-planet system
HD 20329b: An ultra-short-period planet around a solar-type star found by TESS
Expanding shells around young clusters - S 171/Be 59
TOI-2196 b: Rare planet in the hot Neptune desert transiting a G-type star
Discovery of an inflated hot Jupiter around a slightly evolved star TOI-1789
A pair of sub-Neptunes transiting the bright K-dwarf TOI-1064 characterized with CHEOPS
TOI-1268b: The youngest hot Saturn-mass transiting exoplanet
Phase curve and geometric albedo of WASP-43b measured with CHEOPS, TESS, and HST WFC3/UVIS
TOI-220b: a warm sub-Neptune discovered by TESS
Six transiting planets and a chain of Laplace resonances in TOI-178
Hot planets around cool stars - two short-period mini-Neptunes transiting the late K-dwarf TOI-1260
GJ 367b: A dense, ultrashort-period sub-Earth planet transiting a nearby red dwarf star
Mass determinations of the three mini-Neptunes transiting TOI-125
TESS Spots a Hot Jupiter with an Inner Transiting Neptune
TOI-132 b: A short-period planet in the Neptune desert transiting a V=11.3 G-type star
It Takes Two Planets in Resonance to Tango around K2-146
The Multiplanet System TOI-421*
The TOI-763 system: Sub-Neptunes orbiting a Sun-like star
K2-280 b - a low density warm sub-Saturn around a mildly evolved star
Two Intermediate-mass Transiting Brown Dwarfs from the TESS Mission
TOI-503: The First Known Brown-dwarf Am-star Binary from the TESS Mission
HD 219666 b: a hot-Neptune from TESS Sector 1
The Transiting Multi-planet System HD15337: Two Nearly Equal-mass Planets Straddling the Radius Gap
K2-264: a transiting multiplanet system in the Praesepe open cluster
K2-290: A warm Jupiter and a mini-Neptune in a triple-star system
K2-140b and K2-180b - Characterization of a hot Jupiter and a mini-Neptune from the K2 mission
K2-295 b and K2-237 b: Two Transiting Hot Jupiters
Three Small Planets Transiting a Hyades Star
K2-137 b: an Earth-sized planet in a 4.3-h orbit around an M-dwarf
K2-155: A Bright Metal-poor M Dwarf with Three Transiting Super-Earths
K2-141 b: A 5-M⊕ super-Earth transiting a K7 V star every 6.7 hours
TESS's first planet: A super-Earth transiting the naked-eye star π Mensae
K2-260 b: A hot Jupiter transiting an F star, and K2-261 b: A warm Saturn around a bright G star
Exoplanets around Low-mass Stars Unveiled by K2
Mass determination of the 1:3:5 near-resonant planets transiting GJ 9827 (K2-135)
K2-139 b: a low-mass warm Jupiter on a 29-d orbit transiting an active K0 V star
44 Validated Planets from K2 Campaign 10
Super-Earth of 8 Mearth in a 2.2-day orbit around the K5V star K2-216
HD 89345: A bright oscillating star hosting a transiting warm Saturn-sized planet observed by K2
K2-111 b - A short period super-Earth transiting a metal poor, evolved old star
Radio observations of globulettes in the Carina nebula
The Transiting Multi-planet System HD 3167: A 5.7 M ⊕ Super-Earth and an 8.3 M ⊕ Mini-Neptune
K2-60b and K2-107b. A Sub-Jovian and a Jovian Planet from the K2 Mission
The Discovery and Mass Measurement of a New Ultra-short-period Planet: K2-131
K2-106, a system containing a metal-rich planet and a planet of lower density
Chemical complexity induced by efficient ice evaporation in the Barnard 5 molecular cloud
Three Super-Earths Transiting the Nearby Star GJ 9827
VELOCITY-RESOLVED [C II] EMISSION AND [C II]/FIR MAPPING ALONG ORION WITH HERSCHEL
Detection of a dense clump in a filament interacting with W51e2
COLD WATER VAPOR IN THE BARNARD 5 MOLECULAR CLOUD
Using Methanol Beacons to Find Water in the Dark
Mass and motion of globulettes in the Rosette Nebula
Observations of Carbon Isotopic Fractionation in Interstellar Formaldehyde
Nitrogen hydrides in interstellar gas towards G10.6-0.4 (W31C) and W49N
The 12C/13C ratio as a chemistry indicator
Observational tests of interstellar methanol formation
Interstellar OH+, H2O+ and H3O+ along the sight-line to G10.6-0.4
The first spectral line surveys searching for signals from the dark ages
Herschel/HIFI measurements of the ortho/para ratio in water towards Sagittarius B2(M) and W31C
Nitrogen hydrides in interstellar gas Herschel/HIFI observations towards G10.6-0.4 (W31C)
CH+(1-0) and 13CH+(1-0) absorption lines in the direction of massive star-forming regions
Molekyler berättar om Universum; Onsala rymdobservatorium firar 60-årsjubileum 2009
Molekyler i rymden berättar hur stjärnor föds
Water and ammonia abundances in S140 with the Odin satellite
Observational constraints on the formation of interstellar methanol
From Molecular Oxygen to Primordial Molecules with the Odin Satellite
Molecular observations at high and low redshifts with the Odin satellite
Upper limits to the water abundance in starburst galaxies
On the progress in Odin´s hunt for molecules
Molecular Astrophysics in Star-forming Regions with the Odin Satellite
DEMON: a proposal for a satellite-borne experiment to study dark matter and dark energy
Odin * CO and 13CO J=5-4 mapping of Orion KL - a step towards accurate water abundances
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Showing 6 research projects
Entering into new territory of exoplanet characterization
Exoplanets from space -CHEOPS and PLATO ESA's next two projects (Phase 2)
Exoplanet diversity with satellite studies
Exoplanets from space – CHEOPS and PLATO, ESA’s next two projects
Inward motion of molecular gas in massive star forming regions