The water ice rich surface of (145453) 2005 RR43: A case for a carbon-depleted population of TNOs?
- Autores
- Pinilla Alonso, N.; Licandro, J.; Gil Hutton, Ricardo Alfredo; Brunetto, R.
- Año de publicación
- 2007
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- Context. Recent results suggest that there is a group of trans-Neptunian objects (TNOs) (2003 EL61 being the biggest member), with surfaces composed of almost pure water ice and with very similar orbital elements. These objects provide exciting laboratories for the study of the processes that prevent the formation of an evolved mantle of organics on the surfaces of the bodies in the trans-Neptunian belt (TNb). Aims. We study the surface composition of another TNO that moves in a similar orbit, (145453) 2005 RR43, and compare it with the surface composition of the other members of the group. Methods. We report visible and near-infrared spectra in the 0.53-2.4 μm spectral range, obtained with the 4.2 m William Herschel Telescope and the 3.58 m Telescopio Nazionale Galileo at the "Roque de los Muchachos" Observatory (La Palma, Spain). Scattering models are used to derive information about its surface composition. We also measure the depth D of the water ice absorption bands and compare with those of the other members of the group. Results. The spectrum of 2005 RR43 is neutral in color in the visible and dominated by very deep water ice absorption bands in the near infrared (D = 70.3 ± 2.1% and 82.8 ± 4.9% at 1.5 μm and 2.0 μm respectively). It is very similar to the spectrum of the group of TNOs already mentioned. All of them present much deeper water ice absorption bands (D > 40%) than any other TNO except Charon. Scattering models show that its surface is covered by water ice, a significant fraction in crystalline state with no trace (5% upper limit) of complex organics. Possible scenarios to explain the existence of this population of TNOs are discussed: a giant collision, an originally carbon depleted composition, or a common process of continuous resurfacing. Conclusions. 2005 RR43 is member of a group, may be a population, of TNOs clustered in the space of orbital parameters that show abundant water ice and no signs of complex organics and which origin needs to be further investigated. The lack of complex organics in their surfaces suggests a significant smaller fraction of carbonaceous volatiles like CH4 in this population than in "normal" TNOs. A carbon depleted population of TNOs could be the origin of the population of carbon depleted Jupiter family comets already noticed by A'Hearn et al. (1995).
Fil: Pinilla Alonso, N.. Fundación Galileo Galilei; España
Fil: Licandro, J.. Instituto Astrofisico de Canarias; España. Isaac Newton Group; España
Fil: Gil Hutton, Ricardo Alfredo. Universidad Nacional de San Juan; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Complejo Astronómico "El Leoncito". Universidad Nacional de Córdoba. Complejo Astronómico "El Leoncito". Universidad Nacional de la Plata. Complejo Astronómico "El Leoncito". Universidad Nacional de San Juan. Complejo Astronómico "El Leoncito"; Argentina
Fil: Brunetto, R.. Istituto Nazionale di Astrofisica; Italia - Materia
-
KUIPER BELT
SOLAR SYSTEM: FORMATION - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
- Repositorio
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/214871
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The water ice rich surface of (145453) 2005 RR43: A case for a carbon-depleted population of TNOs?Pinilla Alonso, N.Licandro, J.Gil Hutton, Ricardo AlfredoBrunetto, R.KUIPER BELTSOLAR SYSTEM: FORMATIONhttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1Context. Recent results suggest that there is a group of trans-Neptunian objects (TNOs) (2003 EL61 being the biggest member), with surfaces composed of almost pure water ice and with very similar orbital elements. These objects provide exciting laboratories for the study of the processes that prevent the formation of an evolved mantle of organics on the surfaces of the bodies in the trans-Neptunian belt (TNb). Aims. We study the surface composition of another TNO that moves in a similar orbit, (145453) 2005 RR43, and compare it with the surface composition of the other members of the group. Methods. We report visible and near-infrared spectra in the 0.53-2.4 μm spectral range, obtained with the 4.2 m William Herschel Telescope and the 3.58 m Telescopio Nazionale Galileo at the "Roque de los Muchachos" Observatory (La Palma, Spain). Scattering models are used to derive information about its surface composition. We also measure the depth D of the water ice absorption bands and compare with those of the other members of the group. Results. The spectrum of 2005 RR43 is neutral in color in the visible and dominated by very deep water ice absorption bands in the near infrared (D = 70.3 ± 2.1% and 82.8 ± 4.9% at 1.5 μm and 2.0 μm respectively). It is very similar to the spectrum of the group of TNOs already mentioned. All of them present much deeper water ice absorption bands (D > 40%) than any other TNO except Charon. Scattering models show that its surface is covered by water ice, a significant fraction in crystalline state with no trace (5% upper limit) of complex organics. Possible scenarios to explain the existence of this population of TNOs are discussed: a giant collision, an originally carbon depleted composition, or a common process of continuous resurfacing. Conclusions. 2005 RR43 is member of a group, may be a population, of TNOs clustered in the space of orbital parameters that show abundant water ice and no signs of complex organics and which origin needs to be further investigated. The lack of complex organics in their surfaces suggests a significant smaller fraction of carbonaceous volatiles like CH4 in this population than in "normal" TNOs. A carbon depleted population of TNOs could be the origin of the population of carbon depleted Jupiter family comets already noticed by A'Hearn et al. (1995).Fil: Pinilla Alonso, N.. Fundación Galileo Galilei; EspañaFil: Licandro, J.. Instituto Astrofisico de Canarias; España. Isaac Newton Group; EspañaFil: Gil Hutton, Ricardo Alfredo. Universidad Nacional de San Juan; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Complejo Astronómico "El Leoncito". Universidad Nacional de Córdoba. Complejo Astronómico "El Leoncito". Universidad Nacional de la Plata. Complejo Astronómico "El Leoncito". Universidad Nacional de San Juan. Complejo Astronómico "El Leoncito"; ArgentinaFil: Brunetto, R.. Istituto Nazionale di Astrofisica; ItaliaEDP Sciences2007-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/214871Pinilla Alonso, N.; Licandro, J.; Gil Hutton, Ricardo Alfredo; Brunetto, R.; The water ice rich surface of (145453) 2005 RR43: A case for a carbon-depleted population of TNOs?; EDP Sciences; Astronomy and Astrophysics; 468; 1; 12-2007; 25-280004-6361CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361:20077294info:eu-repo/semantics/altIdentifier/url/https://arxiv.org/abs/astro-ph/0703098info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:32:18Zoai:ri.conicet.gov.ar:11336/214871instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 09:32:18.645CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
dc.title.none.fl_str_mv |
The water ice rich surface of (145453) 2005 RR43: A case for a carbon-depleted population of TNOs? |
title |
The water ice rich surface of (145453) 2005 RR43: A case for a carbon-depleted population of TNOs? |
spellingShingle |
The water ice rich surface of (145453) 2005 RR43: A case for a carbon-depleted population of TNOs? Pinilla Alonso, N. KUIPER BELT SOLAR SYSTEM: FORMATION |
title_short |
The water ice rich surface of (145453) 2005 RR43: A case for a carbon-depleted population of TNOs? |
title_full |
The water ice rich surface of (145453) 2005 RR43: A case for a carbon-depleted population of TNOs? |
title_fullStr |
The water ice rich surface of (145453) 2005 RR43: A case for a carbon-depleted population of TNOs? |
title_full_unstemmed |
The water ice rich surface of (145453) 2005 RR43: A case for a carbon-depleted population of TNOs? |
title_sort |
The water ice rich surface of (145453) 2005 RR43: A case for a carbon-depleted population of TNOs? |
dc.creator.none.fl_str_mv |
Pinilla Alonso, N. Licandro, J. Gil Hutton, Ricardo Alfredo Brunetto, R. |
author |
Pinilla Alonso, N. |
author_facet |
Pinilla Alonso, N. Licandro, J. Gil Hutton, Ricardo Alfredo Brunetto, R. |
author_role |
author |
author2 |
Licandro, J. Gil Hutton, Ricardo Alfredo Brunetto, R. |
author2_role |
author author author |
dc.subject.none.fl_str_mv |
KUIPER BELT SOLAR SYSTEM: FORMATION |
topic |
KUIPER BELT SOLAR SYSTEM: FORMATION |
purl_subject.fl_str_mv |
https://purl.org/becyt/ford/1.3 https://purl.org/becyt/ford/1 |
dc.description.none.fl_txt_mv |
Context. Recent results suggest that there is a group of trans-Neptunian objects (TNOs) (2003 EL61 being the biggest member), with surfaces composed of almost pure water ice and with very similar orbital elements. These objects provide exciting laboratories for the study of the processes that prevent the formation of an evolved mantle of organics on the surfaces of the bodies in the trans-Neptunian belt (TNb). Aims. We study the surface composition of another TNO that moves in a similar orbit, (145453) 2005 RR43, and compare it with the surface composition of the other members of the group. Methods. We report visible and near-infrared spectra in the 0.53-2.4 μm spectral range, obtained with the 4.2 m William Herschel Telescope and the 3.58 m Telescopio Nazionale Galileo at the "Roque de los Muchachos" Observatory (La Palma, Spain). Scattering models are used to derive information about its surface composition. We also measure the depth D of the water ice absorption bands and compare with those of the other members of the group. Results. The spectrum of 2005 RR43 is neutral in color in the visible and dominated by very deep water ice absorption bands in the near infrared (D = 70.3 ± 2.1% and 82.8 ± 4.9% at 1.5 μm and 2.0 μm respectively). It is very similar to the spectrum of the group of TNOs already mentioned. All of them present much deeper water ice absorption bands (D > 40%) than any other TNO except Charon. Scattering models show that its surface is covered by water ice, a significant fraction in crystalline state with no trace (5% upper limit) of complex organics. Possible scenarios to explain the existence of this population of TNOs are discussed: a giant collision, an originally carbon depleted composition, or a common process of continuous resurfacing. Conclusions. 2005 RR43 is member of a group, may be a population, of TNOs clustered in the space of orbital parameters that show abundant water ice and no signs of complex organics and which origin needs to be further investigated. The lack of complex organics in their surfaces suggests a significant smaller fraction of carbonaceous volatiles like CH4 in this population than in "normal" TNOs. A carbon depleted population of TNOs could be the origin of the population of carbon depleted Jupiter family comets already noticed by A'Hearn et al. (1995). Fil: Pinilla Alonso, N.. Fundación Galileo Galilei; España Fil: Licandro, J.. Instituto Astrofisico de Canarias; España. Isaac Newton Group; España Fil: Gil Hutton, Ricardo Alfredo. Universidad Nacional de San Juan; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Complejo Astronómico "El Leoncito". Universidad Nacional de Córdoba. Complejo Astronómico "El Leoncito". Universidad Nacional de la Plata. Complejo Astronómico "El Leoncito". Universidad Nacional de San Juan. Complejo Astronómico "El Leoncito"; Argentina Fil: Brunetto, R.. Istituto Nazionale di Astrofisica; Italia |
description |
Context. Recent results suggest that there is a group of trans-Neptunian objects (TNOs) (2003 EL61 being the biggest member), with surfaces composed of almost pure water ice and with very similar orbital elements. These objects provide exciting laboratories for the study of the processes that prevent the formation of an evolved mantle of organics on the surfaces of the bodies in the trans-Neptunian belt (TNb). Aims. We study the surface composition of another TNO that moves in a similar orbit, (145453) 2005 RR43, and compare it with the surface composition of the other members of the group. Methods. We report visible and near-infrared spectra in the 0.53-2.4 μm spectral range, obtained with the 4.2 m William Herschel Telescope and the 3.58 m Telescopio Nazionale Galileo at the "Roque de los Muchachos" Observatory (La Palma, Spain). Scattering models are used to derive information about its surface composition. We also measure the depth D of the water ice absorption bands and compare with those of the other members of the group. Results. The spectrum of 2005 RR43 is neutral in color in the visible and dominated by very deep water ice absorption bands in the near infrared (D = 70.3 ± 2.1% and 82.8 ± 4.9% at 1.5 μm and 2.0 μm respectively). It is very similar to the spectrum of the group of TNOs already mentioned. All of them present much deeper water ice absorption bands (D > 40%) than any other TNO except Charon. Scattering models show that its surface is covered by water ice, a significant fraction in crystalline state with no trace (5% upper limit) of complex organics. Possible scenarios to explain the existence of this population of TNOs are discussed: a giant collision, an originally carbon depleted composition, or a common process of continuous resurfacing. Conclusions. 2005 RR43 is member of a group, may be a population, of TNOs clustered in the space of orbital parameters that show abundant water ice and no signs of complex organics and which origin needs to be further investigated. The lack of complex organics in their surfaces suggests a significant smaller fraction of carbonaceous volatiles like CH4 in this population than in "normal" TNOs. A carbon depleted population of TNOs could be the origin of the population of carbon depleted Jupiter family comets already noticed by A'Hearn et al. (1995). |
publishDate |
2007 |
dc.date.none.fl_str_mv |
2007-12 |
dc.type.none.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://purl.org/coar/resource_type/c_6501 info:ar-repo/semantics/articulo |
format |
article |
status_str |
publishedVersion |
dc.identifier.none.fl_str_mv |
http://hdl.handle.net/11336/214871 Pinilla Alonso, N.; Licandro, J.; Gil Hutton, Ricardo Alfredo; Brunetto, R.; The water ice rich surface of (145453) 2005 RR43: A case for a carbon-depleted population of TNOs?; EDP Sciences; Astronomy and Astrophysics; 468; 1; 12-2007; 25-28 0004-6361 CONICET Digital CONICET |
url |
http://hdl.handle.net/11336/214871 |
identifier_str_mv |
Pinilla Alonso, N.; Licandro, J.; Gil Hutton, Ricardo Alfredo; Brunetto, R.; The water ice rich surface of (145453) 2005 RR43: A case for a carbon-depleted population of TNOs?; EDP Sciences; Astronomy and Astrophysics; 468; 1; 12-2007; 25-28 0004-6361 CONICET Digital CONICET |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
info:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361:20077294 info:eu-repo/semantics/altIdentifier/url/https://arxiv.org/abs/astro-ph/0703098 |
dc.rights.none.fl_str_mv |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
eu_rights_str_mv |
openAccess |
rights_invalid_str_mv |
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
dc.format.none.fl_str_mv |
application/pdf application/pdf |
dc.publisher.none.fl_str_mv |
EDP Sciences |
publisher.none.fl_str_mv |
EDP Sciences |
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reponame:CONICET Digital (CONICET) instname:Consejo Nacional de Investigaciones Científicas y Técnicas |
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CONICET Digital (CONICET) |
collection |
CONICET Digital (CONICET) |
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Consejo Nacional de Investigaciones Científicas y Técnicas |
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CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas |
repository.mail.fl_str_mv |
dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar |
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13.070432 |