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  • Davidsson, Bjorn J. R.CALTECH, Jet Prop Lab, M-S 183-401,4800 Oak Grove Dr, Pasadena, CA 91109 USA. (author)

CO2-driven surface changes in the Hapi region on Comet 67P/Churyumov-Gerasimenko

  • Article/chapterEnglish2022

Publisher, publication year, extent ...

  • 2022-09-11
  • Oxford University Press,2022
  • printrdacarrier

Numbers

  • LIBRIS-ID:oai:DiVA.org:uu-488325
  • https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-488325URI
  • https://doi.org/10.1093/mnras/stac2560DOI

Supplementary language notes

  • Language:English
  • Summary in:English

Part of subdatabase

Classification

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

Notes

  • Between 2014 December 31 and 2015 March 17, the OSIRIS cameras on Rosetta documented the growth of a 140 -m wide and 0.5 -m deep depression in the Hapi region on Comet 67P/Churyumov-Gerasimenko. This shallow pit is one of several that later formed elsewhere on the comet, all in smooth terrain that primarily is the result of airfall of coma particles. We have compiled observations of this region in Hapi by the microwave instrument MIRO on Rosetta, acquired during October and November 2014. We use thermophysical and radiative transfer models in order to reproduce the MIRO observations. This allows us to place constraints on the thermal inertia, diffusivity, chemical composition, stratification, extinction coefficients, and scattering properties of the surface material, and how they evolved during the months prior to pit formation. The results are placed in context through long-term comet nucleus evolution modelling. We propose that (1) MIRO observes signatures that are consistent with a solid-state greenhouse effect in airfall material; (2) CO2 ice is sufficiently close to the surface to have a measurable effect on MIRO antenna temperatures, and likely is responsible for the pit formation in Hapi observed by OSIRIS; (3) the pressure at the CO2 sublimation front is sufficiently strong to expel dust and water ice outwards, and to compress comet material inwards, thereby causing the near-surface compaction observed by CONSERT, SESAME, and groundbased radar, manifested as the 'consolidated terrain' texture observed by OSIRIS.

Subject headings and genre

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

  • Schloerb, F. PeterUniv Massachusetts, Dept Astron, LGRT B 847 710 North Pleasant St, Amherst, MA 01003 USA. (author)
  • Fornasier, SoniaSorbonne Univ, CNRS, Univ PSL, LESIA,Univ Paris Cite,Observ Paris, 5 Pl Jules Janssen, F-92195 Meudon, France.;Inst Univ France IUF, 1 Rue Descartes, F-75231 Paris 05, France. (author)
  • Oklay, Nilda (author)
  • Gutierrez, Pedro J.Inst Astrofis Andalucia CSIC, Glorieta Astron S-N, E-18080 Granada, Spain. (author)
  • Buratti, Bonnie J.CALTECH, Jet Prop Lab, M-S 183-601,4800 Oak Grove Dr, Pasadena, CA 91109 USA. (author)
  • Chmielewski, Artur B.CALTECH, Jet Prop Lab, M-S 321-655,4800 Oak Grove Dr, Pasadena, CA 91109 USA. (author)
  • Gulkis, Samuel200 W Highland Dr,Unit 104, Seattle, WA 98119 USA. (author)
  • Hofstadter, Mark D.CALTECH, Jet Prop Lab, M-S 183-301,4800 Oak Grove Dr, Pasadena, CA 91109 USA. (author)
  • Keller, H. UweTech Univ Carolo Wilhelmina Braunschweig, Inst Geophys & Extraterr Phys IGeP, Mendelssohnstr 3, D-38106 Braunschweig, Germany.;Deutsch Zentrum Luft & Raumfahrt DLR, Inst Planetenforsch Asteroiden & Kometen, Rutherfordstr 2, D-12489 Berlin, Germany. (author)
  • Sierks, HolgerMax Planck Inst Solar Syst Res, Justus von Liebig Weg 3, D-37077 Gottingen, Germany. (author)
  • Guettler, CarstenMax Planck Inst Solar Syst Res, Justus von Liebig Weg 3, D-37077 Gottingen, Germany. (author)
  • Kueppers, MichaelEuropean Space Agcy ESA, European Space Astron Ctr ESAC, Camino Bajo Castillo S-N, E-28692 Madrid, Spain. (author)
  • Rickman, HansUppsala universitet,Observationell astrofysik,Polskiej Akad Nauk, Ctr Badan Kosmicznych, Bartycka 18A, PL-00716 Warsaw, Poland(Swepub:uu)hansrick (author)
  • Choukroun, MathieuCALTECH, Jet Prop Lab, M-S 183-601,4800 Oak Grove Dr, Pasadena, CA 91109 USA. (author)
  • Lee, SeungwonCALTECH, Jet Prop Lab, M-S 168-200,4800 Oak Grove Dr, Pasadena, CA 91109 USA. (author)
  • Lellouch, EmmanuelSorbonne Univ, CNRS, Univ PSL, LESIA,Univ Paris Cite,Observ Paris, 5 Pl Jules Janssen, F-92195 Meudon, France. (author)
  • Lethuillier, AnthonyTech Univ Carolo Wilhelmina Braunschweig, Inst Geophys & Extraterr Phys IGeP, Mendelssohnstr 3, D-38106 Braunschweig, Germany. (author)
  • Da Deppo, VaniaCNR IFN Padova, Via Trasea 7, I-35131 Padua, Italy. (author)
  • Groussin, OlivierAir Marseille Univ, LAM, CNES, CNRS, Marseille, France. (author)
  • Kuehrt, EkkehardGerman Aerosp Ctr DLR, Inst Opt Sensor Syst, Ruthetfordstr 2, D-12489 Berlin, Germany. (author)
  • Thomas, NicolasUniv Bern, Phys Inst, Space Res & Planetol Div, Sidlerstr 5, CH-3012 Bern, Switzerland. (author)
  • Tubiana, CeciliaIst Astrofis & Planetol Spaziali IAIS INAF, Via Fosso Cavaliere 100, I-00133 Rome, Italy. (author)
  • El-Maarry, M. RamyKhalifa Univ, Space & Planetary Sci Ctr, POB 127788, Abu Dhabi, U Arab Emirates.;Khalifa Univ, Dept Earth Sci, POB 127788, Abu Dhabi, U Arab Emirates. (author)
  • La Forgia, FiorangelaUniv Padua, Dept Phys & Astron, Vicolo Osservatorio 3, I-35122 Padua, Italy. (author)
  • Mottola, StefanoDeutsch Zentrum Luft & Raumfahrt DLR, Inst Planetenforsch Asteroiden & Kometen, Rutherfordstr 2, D-12489 Berlin, Germany. (author)
  • Pajola, MaurizioINAF Astron Observ Padova, Vic Osservatorio 5, I-35122 Padua, Italy. (author)
  • CALTECH, Jet Prop Lab, M-S 183-401,4800 Oak Grove Dr, Pasadena, CA 91109 USA.Univ Massachusetts, Dept Astron, LGRT B 847 710 North Pleasant St, Amherst, MA 01003 USA. (creator_code:org_t)

Related titles

  • In:Monthly notices of the Royal Astronomical Society: Oxford University Press516:4, s. 6009-60400035-87111365-2966

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