Seeds Of Life In Space (SOLIS) The Organic Composition Diversity at 300-1000 au Scale in Solar-type Star-forming Regions

C. Ceccarelli (1) , P. Caselli (2) , F. Fontani (3) , R. Neri , A. Lopez-Sepulcre (1) , C. Codella (4) , S. Feng (2) , I. Jimenez-Serra (5, 6) , B. Lefloch (1) , J. E. Pineda (2) , C. Vastel (7) , F. Alves (2) , R. Bachiller , N. Balucani (8, 1) , E. Bianchi (3, 9) , L. Bizzocchi (2) , S. Bottinelli (7) , E. Caux (7) , A. Chacon-Tanarro (2) , R. Choudhury (2) , A. Coutens (6) , F. Dulieu (10) , C. Favre (3, 1) , Pierre Hily-Blant (1) , J. Holdship (6) , C. Kahane (1) , A. Jaber Al-Edhari (1) , J. Laas (2) , J. Ospina (1) , Y. Oya , L. Podio (4) , A. Pon (11) , A. Punanova (2) , D. Quenard (5) , A. Rimola (12) , N. Sakai (13) , Ian R Sims (14) , S. Spezzano (2) , V. Taquet (3) , L. Testi (4) , P. Theule (15) , P. Ugliengo (16) , A. I. Vasyunin (17, 2) , S. Viti (6) , L. Wiesenfeld (18, 1) , S. Yamamoto (19)

1 IPAG - Institut de Planétologie et d'Astrophysique de Grenoble
2 MPE - Max Planck Institute for Extraterrestrial Physics
3 OAB - INAF - Osservatorio Astronomico di Brera
4 OAA - INAF - Osservatorio Astrofisico di Arcetri
5 QMUL - Queen Mary University of London
6 UCL - University College of London [London]
7 IRAP - Institut de recherche en astrophysique et planétologie
8 UNIPG - Università degli Studi di Perugia = University of Perugia
9 UniFI - Università degli Studi di Firenze = University of Florence = Université de Florence
10 LERMA - LERMA Cergy
11 UWO - University of Western Ontario
12 UAB - Universitat Autònoma de Barcelona = Autonomous University of Barcelona = Universidad Autónoma de Barcelona
13 RIKEN - RIKEN - Institute of Physical and Chemical Research [Japon]
14 IPR - Institut de Physique de Rennes
15 PIIM - Physique des interactions ioniques et moléculaires
16 UNITO - Università degli studi di Torino = University of Turin
17 UrFU - Ural Federal University [Ekaterinburg]
18 CNRS - Centre National de la Recherche Scientifique
19 UEC - University of Electro-Communications [Tokyo]

Complex organic molecules have been observed for decades in the interstellar medium. Some of them might be considered as small bricks of the macromolecules at the base of terrestrial life. It is hence particularly important to understand organic chemistry in Solar-like star-forming regions. In this article, we present a new observational project: Seeds Of Life In Space (SOLIS). This is a Large Project using the IRAM-NOEMA interferometer, and its scope is to image the emission of several crucial organic molecules in a sample of Solar-like star-forming regions in different evolutionary stages and environments. Here we report the first SOLIS results, obtained from analyzing the spectra of different regions of the Class 0 source NGC 1333-IRAS4A, the protocluster OMC-2 FIR4, and the shock site L1157-B1. The different regions were identified based on the images of formamide (NH₂CHO) and cyanodiacetylene (HC₅N) lines. We discuss the observed large diversity in the molecular and organic content, both on large (3000-10,000 au) and relatively small (300-1000 au) scales. Finally, we derive upper limits to the methoxy fractional abundance in the three observed regions of the same order of magnitude of that measured in a few cold prestellar objects, namely ˜ {10}^-12-10^-11 with respect to H₂ molecules.

Mots clés: Molecular physics; ISM abundances; ISM molecules; Molecular physics; ISM clouds; radio lines ISM

Domaines: Physique [physics]; Astrophysique [astro-ph]

C. Ceccarelli, P. Caselli, F. Fontani, R. Neri, A. Lopez-Sepulcre, et al.. Seeds Of Life In Space (SOLIS) The Organic Composition Diversity at 300-1000 au Scale in Solar-type Star-forming Regions. The Astrophysical Journal, 2017, 850 (2), pp.176. ⟨10.3847/1538-4357/aa961d⟩. ⟨hal-01771073⟩