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Outgassing behavior of C/2012 S1 (ISON) from 2011 September to 2013 June

Meech, Karen J. and Yang, Bin and Kleyna, Jan and Ansdell, Megan and Chiang, Hsin-Fang and Hainaut, Olivier and Vincent, Jean-Baptiste and Boehnhardt, Hermann and Fitzsimmons, Alan and Rector, Travis and Riesen, Timm and Keane, Jacqueline V. and Reipurth, Bo and Hsieh, Henry H. and Michaud, Peter and Milani, Giannantonio and Bryssinck, Erik and Ligustri, Rolando and Trabatti, Roberto and Tozzi, Gian-Paolo and Mottola, Stefano and Kuehrt, Ekkehard and Bhatt, Bhuwan and Sahu, Devendra and Lisse, Carey and Denneau, Larry and Jedicke, Robert and Magnier, Eugene and Wainscoat, Richard (2013) Outgassing behavior of C/2012 S1 (ISON) from 2011 September to 2013 June. The Astrophysical Journal, 776 (2), L20. American Astronomical Society. DOI: 10.1088/2041-8205/776/2/L20 ISSN 0004-637X

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Official URL: http://dx.doi.org/10.1088/2041-8205/776/2/L20


We report photometric observations for comet C/2012 S1 (ISON) obtained during the time period immediately after discovery (r = 6.28 AU) until it moved into solar conjunction in mid-2013 June using the UH2.2 m, and Gemini North 8 m telescopes on Mauna Kea, the Lowell 1.8 m in Flagstaff, the Calar Alto 1.2 m telescope in Spain, the VYSOS-5 telescopes on Mauna Loa Hawaii and data from the CARA network. Additional pre-discovery data from the Pan STARRS1 survey extends the light curve back to 2011 September 30 (r = 9.4 AU). The images showed a similar tail morphology due to small micron sized particles throughout 2013. Observations at submillimeter wavelengths using the James Clerk Maxwell Telescope on 15 nights between 2013 March 9 (r = 4.52 AU) and June 16 (r = 3.35 AU) were used to search for CO and HCN rotation lines. No gas was detected, with upper limits for CO ranging between 3.5–4.5 × 1027 molecules s−1. Combined with published water production rate estimates we have generated ice sublimation models consistent with the photometric light curve. The inbound light curve is likely controlled by sublimation of CO2. At these distances water is not a strong contributor to the outgassing. We also infer that there was a long slow outburst of activity beginning in late 2011 peaking in mid-2013 January (r ∼ 5 AU) at which point the activity decreased again through 2013 June.We suggest that this outburst was driven by CO injecting large water ice grains into the coma. Observations as the comet came out of solar conjunction seem to confirm our models.

Item URL in elib:https://elib.dlr.de/84570/
Document Type:Article
Title:Outgassing behavior of C/2012 S1 (ISON) from 2011 September to 2013 June
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Meech, Karen J.NASA Astrobiology InstituteUNSPECIFIED
Yang, BinNASA Astrobiology InstituteUNSPECIFIED
Kleyna, JanNASA Astrobiology InstituteUNSPECIFIED
Ansdell, MeganInstitute for Astronomy, University of HawaiiUNSPECIFIED
Chiang, Hsin-FangInstitute for Astronomy, University of HawaiiUNSPECIFIED
Hainaut, OlivierEuropean Southern ObservatoryUNSPECIFIED
Vincent, Jean-BaptisteMax-Planck-Institut fur SonnensystemforschungUNSPECIFIED
Boehnhardt, HermannMax-Planck-Institut fur SonnensystemforschungUNSPECIFIED
Fitzsimmons, AlanQueens University BelfastUNSPECIFIED
Rector, TravisDepartment of Physics and Astronomy, University of AlaskaUNSPECIFIED
Riesen, TimmInstitute for Astronomy, University of HawaiiUNSPECIFIED
Keane, Jacqueline V.Institute for Astronomy, University of HawaiiUNSPECIFIED
Reipurth, BoInstitute for Astronomy, University of HawaiiUNSPECIFIED
Hsieh, Henry H.NASA Astrobiology Institute, HonoluluUNSPECIFIED
Michaud, PeterGemini ObservatoryUNSPECIFIED
Milani, GiannantonioCARA ProjectUNSPECIFIED
Bryssinck, ErikBRIXIIS ObservatoryUNSPECIFIED
Ligustri, RolandoTalmassons ObservatoryUNSPECIFIED
Trabatti, RobertoStazione Astronomica DescartesUNSPECIFIED
Tozzi, Gian-PaoloINAF-Osservatorio Astrofisico di ArcetriUNSPECIFIED
Mottola, Stefanostefano.mottola (at) dlr.deUNSPECIFIED
Kuehrt, Ekkehardekkehard.kuehrt (at) dlr.deUNSPECIFIED
Bhatt, BhuwanIndian Institute of AstrophysicsUNSPECIFIED
Sahu, DevendraIndian Institute of AstrophysicsUNSPECIFIED
Denneau, LarryInstitute for Astronomy, University of HawaiiUNSPECIFIED
Jedicke, RobertInstitute for Astronomy, University of HawaiiUNSPECIFIED
Magnier, EugeneInstitute for Astronomy, University of HawaiiUNSPECIFIED
Wainscoat, RichardInstitute for Astronomy, University of HawaiiUNSPECIFIED
Date:3 October 2013
Journal or Publication Title:The Astrophysical Journal
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
DOI :10.1088/2041-8205/776/2/L20
Page Range:L20
Publisher:American Astronomical Society
Keywords:comets, ISON
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Science and Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Erforschung des Weltraums
DLR - Research theme (Project):R - Vorhaben Exploration des Sonnensystems
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Asteroids and Comets
Deposited By: Mottola, Dr.phys. Stefano
Deposited On:25 Nov 2013 11:00
Last Modified:06 Sep 2019 15:30

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