Unpublished conference/Abstract (Scientific congresses and symposiums)
Follow-up of the activity and composition of the interstellar comet 2I/Borisov with MUSE
Opitom, Cyrielle; Bannister, Michele; Rousselot, Philippe et al.
202014th Europlanet Science Congress 2020
 

Files


Full Text
EPSC2020-569-print.pdf
Publisher postprint (128.76 kB)
Download

All documents in ORBi are protected by a user license.

Send to



Details



Abstract :
[en] The interstellar comet 2I/Borisov was discovered on August 20, 2019. It is only the second interstellar object to be observed crossing our Solar System, and the first one for which outgassing was detected directly [1]. Early observations indicated that 2I/Borisov is depleted in C2, similarly to about 30% of Solar System comets [2,3]. Preliminary observations with the MUSE IFU performed in November 2019 confirmed that 2I is depleted in C2 but also showed it is rich in NH2 [4]. We present here results from the full observing campaign performed with the MUSE instrument.MUSE is a multi-unit integral field spectrograph mounted on the UT4 telescope of the VLT [5]. The instrument covers the wavelength range from 480 to 930 nm with a resolving power of about 3000. It has a large field of view of 1"x1" and a spatial resolution of 0.2", which makes it an ideal instrument to study extended sources. We observed 2I with MUSE on 16 different dates between November 14, 2019 and March 19, 2020. The observations started about one month before the perihelion passage and continued until the comet reached 3 au post-perihelion. This data sets constitutes a great opportunity to study the activity and coma composition of 2I over several months.Our observations allow us to detect emission bands from C2, NH2, and CN. Using a Haser model [6] we derive production rates for those 3 species and follow their evolution. We also study the evolution of the ratio between those production rates, to monitor how the composition of 2I coma changes as a function of time and distance from the Sun.References:[1] Fitzsimmons et al., 2019, The Astrophysical Journal Letters, Volume 885, Issue 1, article id. L9, 6 pp.[2] Opitom et al., 2019, Astronomy & Astrophysics, Volume 631, id.L8, 5 pp.; [3] Lin et al., 2019, The Astrophysical Journal Letters, Volume 889, Issue 2, id.L30;[4] Bannister et al, 2020, submitted to ApJ Letters; [5] Bacon et al, 2010, Proceedings of the SPIE, Volume 7735, id. 773508; [6] Haser, 1957,Bulletin de la Classe des Sciences de l'Académie Royale de Belgique, vol. 43, p. 740-750
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Opitom, Cyrielle;  European Southern Observatory, Santiago, Chile ; Institute for Astronomy, University of Edinburgh, Royal Observatory, Edinburgh EH9 3HJ, UK
Bannister, Michele;  School of Physical and Chemical Sciences - Te Kura Matu, University of Canterbury, Private Bag 4800, Christchurch 8140, New Zealand
Rousselot, Philippe;  Institut UTINAM UMR 6213, CNRS, Univ. Bourgogne Franche-Comté, OSU THETA, BP 1615, 25010 Besançon Cedex, France
Fitzsimmons, Alan;  Astrophysics Research Centre, School of Mathematics and Physics, Queen's University Belfast, Belfast BT7 1NN, UK
Guilbert-Lepoutre, Aurélie;  Univ Lyon, Univ Lyon 1, ENSL, CNRS, LGL-TPE, F-69622, Villeurbanne, France
Jehin, Emmanuel  ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Origines Cosmologiques et Astrophysiques (OrCa)
Knight, Matthew;  Department of Physics, United States Naval Academy, 572C Holloway Rd, Annapolis, MD 21402, USA
Moulane, Youssef  ;  Astrophysics Research Centre, School of Mathematics and Physics, Queen's University Belfast, Belfast BT7 1NN, UK
Schwamb, Meg;  Dept. of the Geophysical Sciences, University of Chicago, Chicago, IL 60637,USA
Seligman, Darryl;  Institute for Astronomy, University of Edinburgh, Royal Observatory, Edinburgh EH9 3HJ, UK
Snodgrass, Colin;  European Southern Observatory, Santiago, Chile)
Yang, Bin  ;  Université de Liège - ULiège > FARAH
Language :
English
Title :
Follow-up of the activity and composition of the interstellar comet 2I/Borisov with MUSE
Publication date :
01 September 2020
Event name :
14th Europlanet Science Congress 2020
Event date :
21 September 2020 - 9 October, 2020
Audience :
International
References of the abstract :
https://www.epsc2020.eu/, id. EPSC2020-569
Available on ORBi :
since 07 January 2021

Statistics


Number of views
51 (4 by ULiège)
Number of downloads
88 (2 by ULiège)

OpenCitations
 
0

Bibliography


Similar publications



Contact ORBi