Ethyl alcohol and sugar in comet C/2014Q2 (Lovejoy)
Nicolas, Biver
(1)
,
Dominique, Bockelée-Morvan
(1)
,
Raphaël, Moreno
(1)
,
Jacques, Crovisier
(1)
,
Pierre, Colom
(1)
,
Dariusz C., Lis
(2)
,
Aage, Sandqvist
,
Jérémie, Boissier
(3)
,
D. Despois
(4)
,
Stefanie N., Milam
(5)
Nicolas, Biver
- Fonction : Auteur
- PersonId : 750437
- IdHAL : nicolas-biver
- ORCID : 0000-0003-2414-5370
Dominique, Bockelée-Morvan
- Fonction : Auteur
- PersonId : 741231
- IdHAL : dominique-bockelee-morvan
- IdRef : 081525680
Aage, Sandqvist
- Fonction : Auteur
Résumé
The presence of numerous complex organic molecules (COMs; defined as those containing six or more atoms) around protostars shows that star formation is accompanied by an increase of molecular complexity. These COMs may be part of the material from which planetesimals and, ultimately, planets formed. Comets represent some of the oldest and most primitive material in the solar system, including ices, and are thus our best window into the volatile composition of the solar protoplanetary disk. Molecules identified to be present in cometary ices include water, simple hydrocarbons, oxygen, sulfur, and nitrogen-bearing species, as well as a few COMs, such as ethylene glycol and glycine. We report the detection of 21 molecules in comet C/2014 Q2 (Lovejoy), including the first identification of ethyl alcohol (ethanol, C2H5OH) and the simplest monosaccharide sugar glycolaldehyde (CH2OHCHO) in a comet. The abundances of ethanol and glycolaldehyde, respectively 5 and 0.8% relative to methanol (0.12 and 0.02% relative to water), are somewhat higher than the values measured in solar- type protostars. Overall, the high abundance of COMs in cometary ices supports the formation through grain-surface reactions in the solar system protoplanetary disk.
Format du dépôt | Fichier |
---|---|
Type de dépôt | Article dans une revue |
Titre |
en
Ethyl alcohol and sugar in comet C/2014Q2 (Lovejoy)
|
Résumé |
en
The presence of numerous complex organic molecules (COMs; defined as those containing six or more atoms) around protostars shows that star formation is accompanied by an increase of molecular complexity. These COMs may be part of the material from which planetesimals and, ultimately, planets formed. Comets represent some of the oldest and most primitive material in the solar system, including ices, and are thus our best window into the volatile composition of the solar protoplanetary disk. Molecules identified to be present in cometary ices include water, simple hydrocarbons, oxygen, sulfur, and nitrogen-bearing species, as well as a few COMs, such as ethylene glycol and glycine. We report the detection of 21 molecules in comet C/2014 Q2 (Lovejoy), including the first identification of ethyl alcohol (ethanol, C2H5OH) and the simplest monosaccharide sugar glycolaldehyde (CH2OHCHO) in a comet. The abundances of ethanol and glycolaldehyde, respectively 5 and 0.8% relative to methanol (0.12 and 0.02% relative to water), are somewhat higher than the values measured in solar- type protostars. Overall, the high abundance of COMs in cometary ices supports the formation through grain-surface reactions in the solar system protoplanetary disk.
|
Auteur(s) |
Nicolas, Biver
1
, Dominique, Bockelée-Morvan
1
, Raphaël, Moreno
1
, Jacques, Crovisier
1
, Pierre, Colom
1
, Dariusz C., Lis
2
, Aage, Sandqvist
, Jérémie, Boissier
3
, D. Despois
4
, Stefanie N., Milam
5
1
LESIA -
Laboratoire d'études spatiales et d'instrumentation en astrophysique
( 1254 )
- 5, place Jules Janssen 92190 MEUDON
- France
2
LERMA -
Laboratoire d'Etude du Rayonnement et de la Matière en Astrophysique
( 165 )
- 61, avenue de l'Observatoire - 75014 PARIS
- France
3
IRAM -
Institut de RadioAstronomie Millimétrique
( 1830 )
- 300 rue de la Piscine, Domaine Universitaire 38406 Saint Martin d'Hères
- France
4
FORMATION STELLAIRE 2015
( 409894 )
- France
5
GSFC -
NASA Goddard Space Flight Center
( 21796 )
- Greenbelt, MD 20771
- États-Unis
|
Licence |
Paternité - Pas d'utilisation commerciale
|
Langue du document |
Anglais
|
Nom de la revue |
|
Vulgarisation |
Non
|
Comité de lecture |
Oui
|
Audience |
Internationale
|
Date de publication |
2015-11
|
Volume |
1
|
Page/Identifiant |
Science Advances, Vol. 1, No. 9, id.1500863
|
Domaine(s) |
|
arXiv Id | 1511.04999 |
ADS Id | 2015SciA....115863B |
DOI | 10.1126/sciadv.1500863 |
Origine :
Fichiers éditeurs autorisés sur une archive ouverte
Loading...