Physical and dynamical characterization of hyperbolic comet C/2017 U7(PANSTARRS)

We present here a dynamical and observational study of the comet C/2017 U7 (PANSTARRS). This comet was discovered in 2017 and found to have a hyperbolic orbit. Our dynamical analysis shows that the object has probably originated in the Oort cloud, however an interstellar origin cannot be discarded....

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Authors: Evangelista Santana, M., Carvano, J. M., Prá, M. de, Fuente Marcos, Raúl de la, Schambeau, C, Fuente Marcos, Carlos de la, Souza Feliciano, Ana Carolina de, Pinilla Alonso, Noemi
Format: article
Publication Date:2022
Country:España
Institution:Universidad Complutense de Madrid (UCM)
Repository:Docta Complutense
Language:English
OAI Identifier:oai:docta.ucm.es:20.500.14352/71962
Online Access:https://hdl.handle.net/20.500.14352/71962
Access Level:Open access
Keyword:52
52-33
Comets
Photometry
Spectroscopy
Dynamics
Astrofísica (Matemáticas)
Astronomía (Matemáticas)
21 Astronomía y Astrofísica
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oai_identifier_str oai:docta.ucm.es:20.500.14352/71962
network_acronym_str ES
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spelling Physical and dynamical characterization of hyperbolic comet C/2017 U7(PANSTARRS)Evangelista Santana, M.Carvano, J. M.Prá, M. deFuente Marcos, Raúl de laSchambeau, CFuente Marcos, Carlos de laSouza Feliciano, Ana Carolina dePinilla Alonso, Noemi5252-33CometsPhotometrySpectroscopyDynamicsAstrofísica (Matemáticas)Astronomía (Matemáticas)21 Astronomía y Astrofísica21 Astronomía y AstrofísicaWe present here a dynamical and observational study of the comet C/2017 U7 (PANSTARRS). This comet was discovered in 2017 and found to have a hyperbolic orbit. Our dynamical analysis shows that the object has probably originated in the Oort cloud, however an interstellar origin cannot be discarded. The observations were obtained in 2018 and 2019 using the Goodman High Throughput Spectrograph (GHTS) at the SOAR telescope. We obtained visible spectra covering the wavelength range of and also images in the SDSS filters system. Both the low-resolution reflectance spectrum and the reflectance spectra derived from the SDSS filters show an atypical band at . We conducted a comparative study of the colors and reflectance spectra of different small body populations (e.g., comets, Centaurs, and trans-Neptunian objects or TNOs) from the literature and concluded that the spectra and the colors of this comet are atypical, showing only some overlap with those of some known members of the TNOs and Centaurs, within the large uncertainties of the measurements of those populations. It is found that the feature and overall spectral shape can be reproduced by laboratory spectra of kerite, a template for aliphatic-rich hydrocarbons that has been previously identified in NIR cometary spectra absorptions. It is tentatively proposed that the unusual spectral shape is the result of a particle size distribution of dust grains in the coma or on the surface that has arisen due to a low grain ejection velocity from the surface and large nucleus size.Elsevier Science B.V., AmsterdamUniversidad Complutense de Madrid20222022-05-0120222022-05-01journal articlehttp://purl.org/coar/resource_type/c_6501info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/20.500.14352/71962reponame:Docta Complutenseinstname:Universidad Complutense de Madrid (UCM)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:docta.ucm.es:20.500.14352/719622026-06-02T12:44:21Z
dc.title.none.fl_str_mv Physical and dynamical characterization of hyperbolic comet C/2017 U7(PANSTARRS)
title Physical and dynamical characterization of hyperbolic comet C/2017 U7(PANSTARRS)
spellingShingle Physical and dynamical characterization of hyperbolic comet C/2017 U7(PANSTARRS)
Evangelista Santana, M.
52
52-33
Comets
Photometry
Spectroscopy
Dynamics
Astrofísica (Matemáticas)
Astronomía (Matemáticas)
21 Astronomía y Astrofísica
21 Astronomía y Astrofísica
title_short Physical and dynamical characterization of hyperbolic comet C/2017 U7(PANSTARRS)
title_full Physical and dynamical characterization of hyperbolic comet C/2017 U7(PANSTARRS)
title_fullStr Physical and dynamical characterization of hyperbolic comet C/2017 U7(PANSTARRS)
title_full_unstemmed Physical and dynamical characterization of hyperbolic comet C/2017 U7(PANSTARRS)
title_sort Physical and dynamical characterization of hyperbolic comet C/2017 U7(PANSTARRS)
dc.creator.none.fl_str_mv Evangelista Santana, M.
Carvano, J. M.
Prá, M. de
Fuente Marcos, Raúl de la
Schambeau, C
Fuente Marcos, Carlos de la
Souza Feliciano, Ana Carolina de
Pinilla Alonso, Noemi
author Evangelista Santana, M.
author_facet Evangelista Santana, M.
Carvano, J. M.
Prá, M. de
Fuente Marcos, Raúl de la
Schambeau, C
Fuente Marcos, Carlos de la
Souza Feliciano, Ana Carolina de
Pinilla Alonso, Noemi
author_role author
author2 Carvano, J. M.
Prá, M. de
Fuente Marcos, Raúl de la
Schambeau, C
Fuente Marcos, Carlos de la
Souza Feliciano, Ana Carolina de
Pinilla Alonso, Noemi
author2_role author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv Universidad Complutense de Madrid
dc.subject.none.fl_str_mv 52
52-33
Comets
Photometry
Spectroscopy
Dynamics
Astrofísica (Matemáticas)
Astronomía (Matemáticas)
21 Astronomía y Astrofísica
21 Astronomía y Astrofísica
topic 52
52-33
Comets
Photometry
Spectroscopy
Dynamics
Astrofísica (Matemáticas)
Astronomía (Matemáticas)
21 Astronomía y Astrofísica
21 Astronomía y Astrofísica
description We present here a dynamical and observational study of the comet C/2017 U7 (PANSTARRS). This comet was discovered in 2017 and found to have a hyperbolic orbit. Our dynamical analysis shows that the object has probably originated in the Oort cloud, however an interstellar origin cannot be discarded. The observations were obtained in 2018 and 2019 using the Goodman High Throughput Spectrograph (GHTS) at the SOAR telescope. We obtained visible spectra covering the wavelength range of and also images in the SDSS filters system. Both the low-resolution reflectance spectrum and the reflectance spectra derived from the SDSS filters show an atypical band at . We conducted a comparative study of the colors and reflectance spectra of different small body populations (e.g., comets, Centaurs, and trans-Neptunian objects or TNOs) from the literature and concluded that the spectra and the colors of this comet are atypical, showing only some overlap with those of some known members of the TNOs and Centaurs, within the large uncertainties of the measurements of those populations. It is found that the feature and overall spectral shape can be reproduced by laboratory spectra of kerite, a template for aliphatic-rich hydrocarbons that has been previously identified in NIR cometary spectra absorptions. It is tentatively proposed that the unusual spectral shape is the result of a particle size distribution of dust grains in the coma or on the surface that has arisen due to a low grain ejection velocity from the surface and large nucleus size.
publishDate 2022
dc.date.none.fl_str_mv 2022
2022-05-01
2022
2022-05-01
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/20.500.14352/71962
url https://hdl.handle.net/20.500.14352/71962
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Elsevier Science B.V., Amsterdam
publisher.none.fl_str_mv Elsevier Science B.V., Amsterdam
dc.source.none.fl_str_mv reponame:Docta Complutense
instname:Universidad Complutense de Madrid (UCM)
instname_str Universidad Complutense de Madrid (UCM)
reponame_str Docta Complutense
collection Docta Complutense
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869405436029960193
score 15,301603

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