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  • Kiefer, F.Institut d 'Astrophysique de Paris,Observatoire de Paris,Paris Observatory,Paris-Sorbonne University (author)

Hint of an exocomet transit in the CHEOPS light curve of HD 172555

  • Article/chapterEnglish2023

Publisher, publication year, extent ...

  • 2023-03-01
  • EDP Sciences,2023
  • electronicrdacarrier

Numbers

  • LIBRIS-ID:oai:research.chalmers.se:43f8e8dc-864e-4752-ba15-b04e83d69e8d
  • https://doi.org/10.1051/0004-6361/202245104DOI
  • https://research.chalmers.se/publication/535043URI
  • https://lup.lub.lu.se/record/acc74be8-cd9e-4ef3-95bb-0db8b2515707URI
  • https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-216323URI

Supplementary language notes

  • Language:English
  • Summary in:English

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  • Subject category:art swepub-publicationtype
  • Subject category:ref swepub-contenttype

Notes

  • HD 172555 is a young (∼20 Myr) A7V star surrounded by a 10 au wide debris disk suspected to be replenished partly by collisions between large planetesimals. Small evaporating transiting bodies, that is exocomets, have also been detected in this system by spectroscopy. After β Pictoris, this is another example of a system possibly witnessing a phase of the heavy bombardment of planetesimals. In such a system, small bodies trace dynamical evolution processes. We aim to constrain their dust content by using transit photometry. We performed a 2-day-long photometric monitoring of HD 172555 with the CHEOPS space telescope in order to detect shallow transits of exocomets with a typical expected duration of a few hours. The large oscillations in the light curve indicate that HD 172555 is a δ Scuti pulsating star. After removing those dominating oscillations, we found a hint of a transient absorption. If fitted with an exocomet transit model, it would correspond to an evaporating body passing near the star at a distance of 6.8±1.4R∗ (or 0.05±0.01 au) with a radius of 2.5 km. These properties are comparable to those of the exocomets already found in this system using spectroscopy, as well as those found in the β Pic system. The nuclei of the Solar System's Jupiter family comets, with radii of 2-6 km, are also comparable in size. This is the first piece of evidence of an exocomet photometric transit detection in the young system of HD 172555.

Subject headings and genre

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  • Van Grootel, V.Universite de Liège,University of Liège (author)
  • des Etangs, A. L.Institut d 'Astrophysique de Paris (author)
  • Szabó, Gy M.Eötvös Loránd University (ELTE) (author)
  • Brandeker, AlexisStockholms universitet,Institutionen för astronomi(Swepub:su)alexis (author)
  • Broeg, C.Universität Bern,University of Bern (author)
  • Collier Cameron, A.University of St Andrews (author)
  • Deline, A.Université de Genève,University of Geneva (author)
  • Olofsson, Göran,1944-Stockholms universitet,Institutionen för astronomi(Swepub:su)olofsson (author)
  • Wilson, T. G.University of St Andrews (author)
  • Sousa, S. G.Universidade do Porto,University of Porto (author)
  • Gandolfi, D.Universita degli Studi di Torino,University of Turin (author)
  • Hebrard, G.Institut d 'Astrophysique de Paris,Observatoire de Haute-Provence (author)
  • Alibert, Y.Universität Bern,University of Bern (author)
  • Alonso, R.Instituto de Astrofísica de Canarias,Universidad de la Laguna,University of La Laguna (author)
  • Anglada, G.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)
  • Bárczy, T. (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)
  • Barros, S. C.C.Universidade do Porto,University of Porto (author)
  • Baumjohann, W. (author)
  • Beck, M.Université de Genève,University of Geneva (author)
  • Beck, T.Universität Bern,University of Bern (author)
  • Benz, W.Universität Bern,University of Bern (author)
  • Billot, N.Université de Genève,University of Geneva (author)
  • Bonfils, X. (author)
  • Cabrera, J.Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR) (author)
  • Charnoz, S.Institut de Physique du Globe de Paris (author)
  • Csizmadia, SzilardDeutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR) (author)
  • Davies, M. B.Lunds universitet,Lund University (author)
  • Deleuil, M.Laboratoire d'Astrophysique de Marseille (author)
  • Delrez, L.Universite de Liège,University of Liège (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)
  • Fossati, L. (author)
  • Fridlund, Malcolm,1952Chalmers tekniska högskola,Chalmers University of Technology,Universiteit Leiden (UL),Leiden University (UL)(Swepub:cth)malfri (author)
  • Gillon, MichaëlUniversite de Liège,University of Liège (author)
  • Gudel, M.Universität Wien,University of Vienna (author)
  • Heng, KevinUniversität Bern,University of Bern,The University of Warwick (author)
  • Hoyer, S.Laboratoire d'Astrophysique de Marseille (author)
  • Isaak, K.European Space Research and Technology Centre (ESA ESTEC) (author)
  • Kiss, L.L.Eötvös Loránd University (ELTE),Magyar Tudomanyos Akademia,Hungarian Academy of Sciences (author)
  • Laskar, J.Observatoire de Paris,Paris Observatory (author)
  • Lendl, M.Université de Genève,University of Geneva (author)
  • Lovis, C.Université de Genève,University of Geneva (author)
  • Magrin, D.Istituto nazionale di astrofisica (INAF) (author)
  • Maxted, P.Keele University (author)
  • Munari, M.Istituto nazionale di astrofisica (INAF) (author)
  • Nascimbeni, ValerioIstituto nazionale di astrofisica (INAF) (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, RobertoIstituto nazionale di astrofisica (INAF),Università Degli Studi di Padova,University of Padua (author)
  • Rando, N.European Space Research and Technology Centre (ESA ESTEC) (author)
  • Ratti, F.European Space Research and Technology Centre (ESA ESTEC) (author)
  • Rauer, H.Freie Universität Berlin,Technische Universität Berlin,Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR) (author)
  • Reimers, C.Universität Wien,University of Vienna (author)
  • Ribas, I.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)
  • Santos, N. C.Universidade do Porto,University of Porto (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)
  • Thomas, N.Universität Bern,University of Bern (author)
  • Udry, S.Université de Genève,University of Geneva (author)
  • Walter, I.Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR) (author)
  • Walton, N. A.University Of Cambridge,University of Cambridge (author)
  • Institut d 'Astrophysique de ParisObservatoire de Paris (creator_code:org_t)

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  • In:Astronomy and Astrophysics: EDP Sciences6710004-63611432-0746

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Kiefer, F.
Van Grootel, V.
des Etangs, A. L ...
Szabó, Gy M.
Brandeker, Alexi ...
Broeg, C.
show more...
Collier Cameron, ...
Deline, A.
Olofsson, Göran, ...
Wilson, T. G.
Sousa, S. G.
Gandolfi, D.
Hebrard, G.
Alibert, Y.
Alonso, R.
Anglada, G.
Bárczy, T.
Davies, M.B.
Barros, S. C.C.
Baumjohann, W.
Beck, M.
Beck, T.
Benz, W.
Billot, N.
Bonfils, X.
Cabrera, J.
Charnoz, S.
Csizmadia, Szila ...
Davies, M. B.
Deleuil, M.
Delrez, L.
Demangeon, O.
Demory, B.O.
Ehrenreich, D.
Erikson, Anders
Fortier, A.
Fossati, L.
Fridlund, Malcol ...
Gillon, Michaël
Gudel, M.
Heng, Kevin
Hoyer, S.
Isaak, K.
Kiss, L.L.
Laskar, J.
Lendl, M.
Lovis, C.
Magrin, D.
Maxted, P.
Munari, M.
Nascimbeni, Vale ...
Ottensamer, R.
Pagano, I.
Palle, E.
Peter, G.
Piazza, D.
Piotto, Giampaol ...
Pollacco, D.
Queloz, D.
Ragazzoni, Rober ...
Rando, N.
Ratti, F.
Rauer, H.
Reimers, C.
Ribas, I.
Santos, N. C.
Scandariato, Gae ...
Segransan, D.
Simon, A.E.
Smith, A. M.S.
Steller, Manfred ...
Thomas, N.
Udry, S.
Walter, I.
Walton, N. A.
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