Reference : Isotopic Ratios in a Peculiar Outbursting Comet
Scientific congresses and symposiums : Paper published in a journal
Physical, chemical, mathematical & earth Sciences : Space science, astronomy & astrophysics
http://hdl.handle.net/2268/215181
Isotopic Ratios in a Peculiar Outbursting Comet
English
Yang, Bin [European Southern Observatory]
Hutsemekers, Damien mailto [Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astroph. extragalactique et observations spatiales (AEOS) >]
Shinnaka, Yoshiharu [National Astronomical Observatory of Japan]
Jehin, Emmanuel mailto [Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Origines Cosmologiques et Astrophysiques (OrCa) >]
Meech, Karen Jean [University of Hawaii]
Opitom, Cyrielle [European Southern Observatory]
Hainaut, Olivier [European Southern Observatory]
Keane, Jacqueline [University of Hawaii]
Manfroid, Jean mailto [Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Département d'astrophys., géophysique et océanographie (AGO) >]
1-Oct-2017
Bulletin of the American Astronomical Society
American Astronomical Society
49
305.01
No
International
0002-7537
New York
NY
49th DPS Meeting
15-20 October 2017
Provo
USA
[en] comets ; solar system
[en] Isotopic ratios in comets provide keys for the understanding of the origin of cometary material, and the physical and chemical conditions in the early Solar Nebula. A newly discovered peculiar comet, C/2015 ER61, underwent an outburst with a total brightness increase of 2 magnitudes on the night of April 4th, 2017. The sharp increase in brightness offers a rare opportunity to measure the isotopic ratios of the light elements of this comet. We obtained two high-resolution spectra of C/2015 ER61 with UVES on Apr. 13 and Apr. 17 respectively. At the time of our observations, the comet was fading gradually since the outburst. We measured the 12C/13C and 14N/15N isotopic ratios from the CN Violet (0,0) band. In addition, we determined the 14N/15N ratio in NH2 for C/2015 ER61 from four pairs of NH2 isotopologue lines. Some 18OH lines were detected but the S/N of these lines is too low to derive a reliable 18O/16O estimate. We will present our UVES spectra of C/2015 ER61, obtained shortly after the outburst. We will also present the comparison of the Isotopic ratios of C/2015 ER61 with those of other comets.
http://hdl.handle.net/2268/215181
http://adsabs.harvard.edu/abs/2017DPS....4930501Y

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