The Appearance of a "Fresh" Surface on 596 Scheila as a Consequence of the 2010 Impact Event
International audience Dust emission was detected on main-belt asteroid 596 Scheila in 2010 December and was attributed to the collision of a few-tens-of-meters projectile on the surface of the asteroid. In such an impact, the ejected material from the collided body is expected to mainly come from i...
Published in: | The Astrophysical Journal Letters |
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Online Access: | https://hal-insu.archives-ouvertes.fr/insu-03667485 https://hal-insu.archives-ouvertes.fr/insu-03667485/document https://hal-insu.archives-ouvertes.fr/insu-03667485/file/Hasegawa_2022_ApJL_924_L9.pdf https://doi.org/10.3847/2041-8213/ac415a |
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ftunivnantes:oai:HAL:insu-03667485v1 2023-05-15T18:30:04+02:00 The Appearance of a "Fresh" Surface on 596 Scheila as a Consequence of the 2010 Impact Event Hasegawa, Sunao Marsset, Michaël Demeo, Francesca E. Bus, Schelte J. Ishiguro, Masateru Kuroda, Daisuke Binzel, Richard P. Hanuš, Josef Nakamura, Akiko M. yang, Bin Vernazza, Pierre Laboratoire d'Astrophysique de Marseille (LAM) Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS) 2022 https://hal-insu.archives-ouvertes.fr/insu-03667485 https://hal-insu.archives-ouvertes.fr/insu-03667485/document https://hal-insu.archives-ouvertes.fr/insu-03667485/file/Hasegawa_2022_ApJL_924_L9.pdf https://doi.org/10.3847/2041-8213/ac415a en eng HAL CCSD info:eu-repo/semantics/altIdentifier/arxiv/2112.04672 info:eu-repo/semantics/altIdentifier/doi/10.3847/2041-8213/ac415a insu-03667485 https://hal-insu.archives-ouvertes.fr/insu-03667485 https://hal-insu.archives-ouvertes.fr/insu-03667485/document https://hal-insu.archives-ouvertes.fr/insu-03667485/file/Hasegawa_2022_ApJL_924_L9.pdf ARXIV: 2112.04672 BIBCODE: 2022ApJ.924L.9H doi:10.3847/2041-8213/ac415a http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess The Astrophysical Journal Letters https://hal-insu.archives-ouvertes.fr/insu-03667485 The Astrophysical Journal Letters, 2022, 924, ⟨10.3847/2041-8213/ac415a⟩ 1469 72 2036 2209 Astrophysics - Earth and Planetary Astrophysics [SDU]Sciences of the Universe [physics] [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph] info:eu-repo/semantics/article Journal articles 2022 ftunivnantes https://doi.org/10.3847/2041-8213/ac415a 2022-06-29T00:27:02Z International audience Dust emission was detected on main-belt asteroid 596 Scheila in 2010 December and was attributed to the collision of a few-tens-of-meters projectile on the surface of the asteroid. In such an impact, the ejected material from the collided body is expected to mainly come from its fresh, unweathered subsurface. Therefore, it is expected that the surface of 596 was partially or entirely refreshed during the 2010 impact. By combining spectra of 596 from the literature and our own observations, we show that the 2010 impact event resulted in a significant slope change in the near-infrared (0.8-2.5 μm) spectrum of the asteroid, from moderately red (T type) before the impact to red (D type) after the impact. This provides evidence that red carbonaceous asteroids become less red with time due to space weathering, in agreement with predictions derived from laboratory experiments on the primitive Tagish Lake meteorite, which is spectrally similar to 596. This discovery provides the very first telescopic confirmation of the expected weathering trend of asteroids spectrally analog to Tagish Lake and/or anhydrous chondritic porous interplanetary dust particles. Our results also suggest that the population of implanted objects from the outer solar system is much larger than previously estimated in the main belt, but many of these objects are hidden below their space-weathered surfaces. Article in Journal/Newspaper Tagish Université de Nantes: HAL-UNIV-NANTES Tagish ENVELOPE(-134.272,-134.272,60.313,60.313) Tagish Lake ENVELOPE(-134.233,-134.233,59.717,59.717) The Astrophysical Journal Letters 924 1 L9 |
institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
1469 72 2036 2209 Astrophysics - Earth and Planetary Astrophysics [SDU]Sciences of the Universe [physics] [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph] |
spellingShingle |
1469 72 2036 2209 Astrophysics - Earth and Planetary Astrophysics [SDU]Sciences of the Universe [physics] [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph] Hasegawa, Sunao Marsset, Michaël Demeo, Francesca E. Bus, Schelte J. Ishiguro, Masateru Kuroda, Daisuke Binzel, Richard P. Hanuš, Josef Nakamura, Akiko M. yang, Bin Vernazza, Pierre The Appearance of a "Fresh" Surface on 596 Scheila as a Consequence of the 2010 Impact Event |
topic_facet |
1469 72 2036 2209 Astrophysics - Earth and Planetary Astrophysics [SDU]Sciences of the Universe [physics] [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph] |
description |
International audience Dust emission was detected on main-belt asteroid 596 Scheila in 2010 December and was attributed to the collision of a few-tens-of-meters projectile on the surface of the asteroid. In such an impact, the ejected material from the collided body is expected to mainly come from its fresh, unweathered subsurface. Therefore, it is expected that the surface of 596 was partially or entirely refreshed during the 2010 impact. By combining spectra of 596 from the literature and our own observations, we show that the 2010 impact event resulted in a significant slope change in the near-infrared (0.8-2.5 μm) spectrum of the asteroid, from moderately red (T type) before the impact to red (D type) after the impact. This provides evidence that red carbonaceous asteroids become less red with time due to space weathering, in agreement with predictions derived from laboratory experiments on the primitive Tagish Lake meteorite, which is spectrally similar to 596. This discovery provides the very first telescopic confirmation of the expected weathering trend of asteroids spectrally analog to Tagish Lake and/or anhydrous chondritic porous interplanetary dust particles. Our results also suggest that the population of implanted objects from the outer solar system is much larger than previously estimated in the main belt, but many of these objects are hidden below their space-weathered surfaces. |
author2 |
Laboratoire d'Astrophysique de Marseille (LAM) Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Hasegawa, Sunao Marsset, Michaël Demeo, Francesca E. Bus, Schelte J. Ishiguro, Masateru Kuroda, Daisuke Binzel, Richard P. Hanuš, Josef Nakamura, Akiko M. yang, Bin Vernazza, Pierre |
author_facet |
Hasegawa, Sunao Marsset, Michaël Demeo, Francesca E. Bus, Schelte J. Ishiguro, Masateru Kuroda, Daisuke Binzel, Richard P. Hanuš, Josef Nakamura, Akiko M. yang, Bin Vernazza, Pierre |
author_sort |
Hasegawa, Sunao |
title |
The Appearance of a "Fresh" Surface on 596 Scheila as a Consequence of the 2010 Impact Event |
title_short |
The Appearance of a "Fresh" Surface on 596 Scheila as a Consequence of the 2010 Impact Event |
title_full |
The Appearance of a "Fresh" Surface on 596 Scheila as a Consequence of the 2010 Impact Event |
title_fullStr |
The Appearance of a "Fresh" Surface on 596 Scheila as a Consequence of the 2010 Impact Event |
title_full_unstemmed |
The Appearance of a "Fresh" Surface on 596 Scheila as a Consequence of the 2010 Impact Event |
title_sort |
appearance of a "fresh" surface on 596 scheila as a consequence of the 2010 impact event |
publisher |
HAL CCSD |
publishDate |
2022 |
url |
https://hal-insu.archives-ouvertes.fr/insu-03667485 https://hal-insu.archives-ouvertes.fr/insu-03667485/document https://hal-insu.archives-ouvertes.fr/insu-03667485/file/Hasegawa_2022_ApJL_924_L9.pdf https://doi.org/10.3847/2041-8213/ac415a |
long_lat |
ENVELOPE(-134.272,-134.272,60.313,60.313) ENVELOPE(-134.233,-134.233,59.717,59.717) |
geographic |
Tagish Tagish Lake |
geographic_facet |
Tagish Tagish Lake |
genre |
Tagish |
genre_facet |
Tagish |
op_source |
The Astrophysical Journal Letters https://hal-insu.archives-ouvertes.fr/insu-03667485 The Astrophysical Journal Letters, 2022, 924, ⟨10.3847/2041-8213/ac415a⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/arxiv/2112.04672 info:eu-repo/semantics/altIdentifier/doi/10.3847/2041-8213/ac415a insu-03667485 https://hal-insu.archives-ouvertes.fr/insu-03667485 https://hal-insu.archives-ouvertes.fr/insu-03667485/document https://hal-insu.archives-ouvertes.fr/insu-03667485/file/Hasegawa_2022_ApJL_924_L9.pdf ARXIV: 2112.04672 BIBCODE: 2022ApJ.924L.9H doi:10.3847/2041-8213/ac415a |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.3847/2041-8213/ac415a |
container_title |
The Astrophysical Journal Letters |
container_volume |
924 |
container_issue |
1 |
container_start_page |
L9 |
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1766213548165300224 |