TOI-1055 b: Neptunian planet characterised with HARPS, TESS, and CHEOPS

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MARC

Bonfanti, A.Space Research Institute, AAS (author)

TOI-1055 b: Neptunian planet characterised with HARPS, TESS, and CHEOPS

Article/chapterEnglish2023

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2023-03-08
EDP Sciences,2023
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LIBRIS-ID:oai:research.chalmers.se:62bd3c3a-7010-44ee-928e-761768f571a2
https://doi.org/10.1051/0004-6361/202245607DOI
https://research.chalmers.se/publication/535072URI
https://lup.lub.lu.se/record/4bb3e20f-2659-4807-a440-2e2604d9893bURI
https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-220590URI

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Language:English
Summary in:English

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Subject category:art swepub-publicationtype
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Context. TOI-1055 is a Sun-like star known to host a transiting Neptune-sized planet on a 17.5-day orbit (TOI-1055 b). Radial velocity (RV) analyses carried out by two independent groups using nearly the same set of HARPS spectra have provided measurements of planetary masses that differ by ∼2σ. Aims. Our aim in this work is to solve the inconsistency in the published planetary masses by significantly extending the set of HARPS RV measurements and employing a new analysis tool that is able to account and correct for stellar activity. Our further aim was to improve the precision on measurements of the planetary radius by observing two transits of the planet with the CHEOPS space telescope. Methods. We fit a skew normal function to each cross correlation function extracted from the HARPS spectra to obtain RV measurements and hyperparameters to be used for the detrending. We evaluated the correlation changes of the hyperparameters along the RV time series using the breakpoint technique. We performed a joint photometric and RV analysis using a Markov chain Monte Carlo scheme to simultaneously detrend the light curves and the RV time series. Results. We firmly detected the Keplerian signal of TOI-1055 b, deriving a planetary mass of Mb = 20.4-2.5+2.6 MO (∼12%). This value is in agreement with one of the two estimates in the literature, but it is significantly more precise. Thanks to the TESS transit light curves combined with exquisite CHEOPS photometry, we also derived a planetary radius of Rb = 3.490-0.064+0.070 RO (∼1.9%). Our mass and radius measurements imply a mean density of ρb = 2.65-0.35+0.37 g cm-3 (∼14%). We further inferred the planetary structure and found that TOI-1055 b is very likely to host a substantial gas envelope with a mass of 0.41-0.20+0.34 MO and a thickness of 1.05-0.29+0.30 RO. Conclusions. Our RV extraction combined with the breakpoint technique has played a key role in the optimal removal of stellar activity from the HARPS time series, enabling us to solve the tension in the planetary mass values published so far for TOI-1055 b.

Subject headings and genre

TEKNIK OCH TEKNOLOGIER Medicinteknik Medicinsk laboratorie- och mätteknik hsv//swe
ENGINEERING AND TECHNOLOGY Medical Engineering Medical Laboratory and Measurements Technologies hsv//eng
NATURVETENSKAP Kemi Analytisk kemi hsv//swe
NATURAL SCIENCES Chemical Sciences Analytical Chemistry hsv//eng
NATURVETENSKAP Fysik Astronomi, astrofysik och kosmologi hsv//swe
NATURAL SCIENCES Physical Sciences Astronomy, Astrophysics and Cosmology hsv//eng
Techniques: photometric
Planets and satellites: fundamental parameters
Stars: fundamental parameters
Techniques: radial velocities
Planets and satellites: fundamental parameters
Stars: fundamental parameters
Techniques: photometric
Techniques: radial velocities
Interplanetary flight
Markov processes
Monte Carlo methods
Orbits
Photometry
Planets
Satellites
Stars
Time series analysis
Measurements of
Planetary mass
Radial velocity
Spectra's
Stars:fundamental parameters
Times series
Velocity analysis
Time series

Added entries (persons, corporate bodies, meetings, titles ...)

Gandolfi, D.Universita degli Studi di Torino,University of Turin (author)
Egger, J. A.Universität Bern,University of Bern (author)
Fossati, L. (author)
Cabrera, J.Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR) (author)
Krenn, A. (author)
Alibert, Y.Universität Bern,University of Bern (author)
Benz, W.Universität Bern,University of Bern (author)
Billot, N.Université de Genève,University of Geneva (author)
Florén, Hans Gustav,1962-Stockholms universitet,Institutionen för astronomi(Swepub:su)flore (author)
Lendl, M.Université de Genève,University of Geneva (author)
Adibekyan, V.Universidade do Porto,University of Porto (author)
Salmon, S.Université de Genève,University of Geneva (author)
Santos, N. C.Universidade do Porto,University of Porto (author)
Sousa, S. G.Universidade do Porto,University of Porto (author)
Wilson, T. G.University of St Andrews (author)
Barragán, O.University Of Oxford (author)
Collier Cameron, A.University of St Andrews (author)
Delrez, L.Universite de Liège,University of Liège (author)
Esposito, M.Thüringer Landessternwarte Tautenburg (author)
Goffo, E.Universita degli Studi di Torino,University of Turin,Thüringer Landessternwarte Tautenburg (author)
Osborne, H. L.M.University College London (UCL) (author)
Osborn, H. P.Universität Bern,University of Bern,Massachusetts Institute of Technology (MIT) (author)
Serrano, L. M.Universita degli Studi di Torino,University of Turin (author)
Van Eylen, VincentUniversity College London (UCL) (author)
Alarcon, JavierEuropean Southern Observatory Santiago (author)
Alonso, R.Universidad de la Laguna,University of La Laguna,Instituto de Astrofísica de Canarias (author)
Anglada, G.Institut d'Estudis Espacials de Catalunya (IEEC),Institute of Space Studies of Catalonia (IEEC),Institut de Ciències de l'Espai (ICE) - CSIC,Institute of Space Sciences (ICE) - CSIC (author)
Bárczy, T. (author)
Barrado Navascues, D.Centro de Astrobiologia (CAB) (author)
Barros, S. C.C.Universidade do Porto,University of Porto (author)
Baumjohann, W. (author)
Davies, M.B.Lund University,Lunds universitet,Matematik (naturvetenskapliga fakulteten),Matematikcentrum,Institutioner vid LTH,Lunds Tekniska Högskola,LU profilområde: Naturlig och artificiell kognition,Lunds universitets profilområden,Mathematics (Faculty of Sciences),Centre for Mathematical Sciences,Departments at LTH,Faculty of Engineering, LTH,LU Profile Area: Natural and Artificial Cognition,Lund University Profile areas(Swepub:lu)astr-mda (author)
Beck, T.Universität Bern,University of Bern (author)
Bedell, MeganFlatiron Institute (author)
Bonfils, X. (author)
Borsato, L.Istituto nazionale di astrofisica (INAF) (author)
Brandeker, Alexis,1974-Stockholms universitet,Institutionen för astronomi(Swepub:su)alexis (author)
Broeg, C.Universität Bern,University of Bern (author)
Charnoz, S.Institut de Physique du Globe de Paris (author)
Corral Van Damme, C.European Space Research and Technology Centre (ESA ESTEC) (author)
Csizmadia, SzilardDeutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR) (author)
Cubillos, P. E.Istituto nazionale di astrofisica (INAF) (author)
Davies, M. B.Lunds universitet,Lund University (author)
Deleuil, M.Laboratoire d'Astrophysique de Marseille (author)
Demangeon, O.Universidade do Porto,University of Porto (author)
Demory, B.O.Universität Bern,University of Bern (author)
Ehrenreich, D.Université de Genève,University of Geneva (author)
Erikson, AndersDeutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR) (author)
Fortier, A.Universität Bern,University of Bern (author)
Fridlund, Malcolm,1952Universiteit Leiden (UL),Leiden University (UL),Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)malfri (author)
Gillon, MichaëlUniversite de Liège,University of Liège (author)
Gudel, M.Universität Wien,University of Vienna (author)
Hoyer, S.Laboratoire d'Astrophysique de Marseille (author)
Isaak, K.European Space Research and Technology Centre (ESA ESTEC) (author)
Kerschbaum, F.Universität Wien,University of Vienna (author)
Kiss, L.L.Magyar Tudomanyos Akademia,Hungarian Academy of Sciences,Eötvös Loránd University (ELTE) (author)
Laskar, J.Observatoire de Paris,Paris Observatory (author)
des Etangs, A. L.Institut d 'Astrophysique de Paris (author)
Lorenzo-Oliveira, D.Universidade de Sao Paulo (USP),University of Sao Paulo (USP) (author)
Lovis, C.Université de Genève,University of Geneva (author)
Magrin, D.Istituto nazionale di astrofisica (INAF) (author)
Marafatto, L.Istituto nazionale di astrofisica (INAF) (author)
Maxted, P.Keele University (author)
Meléndez, J.Universidade de Sao Paulo (USP),University of Sao Paulo (USP) (author)
Mordasini, C.Universität Bern,University of Bern (author)
Nascimbeni, ValerioIstituto nazionale di astrofisica (INAF) (author)
Olofsson, Göran,1944-Stockholms universitet,Institutionen för astronomi(Swepub:su)olofsson (author)
Ottensamer, R.Universität Wien,University of Vienna (author)
Pagano, I.Istituto nazionale di astrofisica (INAF) (author)
Palle, E.Instituto de Astrofísica de Canarias (author)
Peter, G.Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR) (author)
Piazza, D.Universität Bern,University of Bern (author)
Piotto, Giampaolo P.Istituto nazionale di astrofisica (INAF),Università Degli Studi di Padova,University of Padua (author)
Pollacco, D.The University of Warwick (author)
Queloz, D.University Of Cambridge,Eidgenössische Technische Hochschule Zürich (ETH),Swiss Federal Institute of Technology in Zürich (ETH) (author)
Ragazzoni, RobertoUniversità Degli Studi di Padova,University of Padua,Istituto nazionale di astrofisica (INAF) (author)
Rando, N.European Space Research and Technology Centre (ESA ESTEC) (author)
Rauer, H.Technische Universität Berlin,Freie Universität Berlin,Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR) (author)
Ribas, I.Institut de Ciències de l'Espai (ICE) - CSIC,Institute of Space Sciences (ICE) - CSIC,Institut d'Estudis Espacials de Catalunya (IEEC),Institute of Space Studies of Catalonia (IEEC) (author)
Scandariato, GaetanoIstituto nazionale di astrofisica (INAF) (author)
Segransan, D.Université de Genève,University of Geneva (author)
Simon, A.E.Universität Bern,University of Bern (author)
Smith, A. M.S.Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR) (author)
Steller, Manfred B. (author)
Szabó, Gy M.Eötvös Loránd University (ELTE) (author)
Thomas, N.Universität Bern,University of Bern (author)
Udry, S.Université de Genève,University of Geneva (author)
Ulmer, B.Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR) (author)
Van Grootel, V.Universite de Liège,University of Liège (author)
Venturini, J.Université de Genève,University of Geneva (author)
Walton, N. A.University Of Cambridge,University of Cambridge (author)
Space Research Institute, AASUniversita degli Studi di Torino (creator_code:org_t)

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By the author/editor: Bonfanti, A.; Gandolfi, D.; Egger, J. A.; Fossati, L.; Cabrera, J.; Krenn, A.; show more...; Alibert, Y.; Benz, W.; Billot, N.; Florén, Hans Gus ...; Lendl, M.; Adibekyan, V.; Salmon, S.; Santos, N. C.; Sousa, S. G.; Wilson, T. G.; Barragán, O.; Collier Cameron, ...; Delrez, L.; Esposito, M.; Goffo, E.; Osborne, H. L.M.; Osborn, H. P.; Serrano, L. M.; Van Eylen, Vince ...; Alarcon, Javier; Alonso, R.; Anglada, G.; Bárczy, T.; Barrado Navascue ...; Barros, S. C.C.; Baumjohann, W.; Davies, M.B.; Beck, T.; Bedell, Megan; Bonfils, X.; Borsato, L.; Brandeker, Alexi ...; Broeg, C.; Charnoz, S.; Corral Van Damme ...; Csizmadia, Szila ...; Cubillos, P. E.; Davies, M. B.; Deleuil, M.; Demangeon, O.; Demory, B.O.; Ehrenreich, D.; Erikson, Anders; Fortier, A.; Fridlund, Malcol ...; Gillon, Michaël; Gudel, M.; Hoyer, S.; Isaak, K.; Kerschbaum, F.; Kiss, L.L.; Laskar, J.; des Etangs, A. L ...; Lorenzo-Oliveira ...; Lovis, C.; Magrin, D.; Marafatto, L.; Maxted, P.; Meléndez, J.; Mordasini, C.; Nascimbeni, Vale ...; Olofsson, Göran, ...; Ottensamer, R.; Pagano, I.; Palle, E.; Peter, G.; Piazza, D.; Piotto, Giampaol ...; Pollacco, D.; Queloz, D.; Ragazzoni, Rober ...; Rando, N.; Rauer, H.; Ribas, I.; Scandariato, Gae ...; Segransan, D.; Simon, A.E.; Smith, A. M.S.; Steller, Manfred ...; Szabó, Gy M.; Thomas, N.; Udry, S.; Ulmer, B.; Van Grootel, V.; Venturini, J.; Walton, N. A.; show less...

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