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Sökning: onr:"swepub:oai:research.chalmers.se:63f3ed08-2fa1-44c1-af4f-23473fbd1d72" > Seeds of Life in Sp...

Seeds of Life in Space (SOLIS) VI. Chemical evolution of sulfuretted species along the outflows driven by the low-mass protostellar binary NGC1333-IRAS4A

Taquet, V (författare)
Istituto nazionale di astrofisica (INAF), Italy
Codella, C. (författare)
Université Grenoble Alpes, France,Istituto nazionale di astrofisica (INAF), Italy
De Simone, M. (författare)
Université Grenoble Alpes, France
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Lopez-Sepulcre, A. (författare)
Université Grenoble Alpes, France,Institut de Radioastronomie Millimétrique (IRAM), France
Pineda, J. E. (författare)
Max Planck Society for the Advancement of Science (MPG), Germany
Segura-Cox, D. (författare)
Max Planck Society for the Advancement of Science (MPG), Germany
Ceccarelli, C. (författare)
Istituto nazionale di astrofisica (INAF), Italy,Université Grenoble Alpes, France
Caselli, P. (författare)
Max Planck Society for the Advancement of Science (MPG), Germany
Gusdorf, A. (författare)
Sorbonne University, France
Persson, Magnus V., 1983 (författare)
Chalmers University of Technology,Chalmers tekniska högskola
Alves, F. (författare)
Max Planck Society for the Advancement of Science (MPG), Germany
Caux, E. (författare)
University of Toulouse, France
Favre, C. (författare)
Université Grenoble Alpes, France
Fontani, F. (författare)
Istituto nazionale di astrofisica (INAF), Italy
Neri, R. (författare)
Institut de Radioastronomie Millimétrique (IRAM), France
Oya, Y. (författare)
University of Tokyo, Japan
Sakai, N. (författare)
RIKEN, Japan
Vastel, C. (författare)
University of Toulouse, France
Yamamoto, S. (författare)
University of Tokyo, Japan
Bachiller, R. (författare)
Balucani, N. (författare)
Istituto nazionale di astrofisica (INAF), Italy,Université Grenoble Alpes, France
Bianchi, E. (författare)
Université Grenoble Alpes, France
Bizzocchi, L. (författare)
Max Planck Society for the Advancement of Science (MPG), Germany
Chacon-Tanarro, A. (författare)
Dulieu, F. (författare)
Enrique-Romero, J. (författare)
Université Grenoble Alpes, France
Feng, S. (författare)
Chinese Academy of Sciences, China
Holdship, J. (författare)
University College London (UCL), United Kingdom
Lefloch, B. (författare)
Université Grenoble Alpes, France
Al-Edhari, A. Jaber (författare)
Université Grenoble Alpes, France
Jimenez-Serra, I (författare)
Spanish National Research Council, Spain
Kahane, C. (författare)
Université Grenoble Alpes, France
Lattanzi, V (författare)
Max Planck Society for the Advancement of Science (MPG), Germany
Ospina-Zamudio, J. (författare)
Université Grenoble Alpes, France
Podio, L. (författare)
Istituto nazionale di astrofisica (INAF), Italy
Punanova, A. (författare)
Rimola, A. (författare)
Universitat Autonoma de Barcelona (UAB), Spain
Sims, I. R. (författare)
Spezzano, S. (författare)
Max Planck Society for the Advancement of Science (MPG), Germany
Testi, L. (författare)
Istituto nazionale di astrofisica (INAF), Italy
Theule, P. (författare)
Ugliengo, P. (författare)
University of Turin, Italy
Vasyunin, (författare)
Vazart, F. (författare)
Université Grenoble Alpes, France
Viti, S. (författare)
University College London (UCL), United Kingdom
Witzel, A. (författare)
Université Grenoble Alpes, France
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 (creator_code:org_t)
2020
2020
Engelska.
Ingår i: Astronomy and Astrophysics. - 0004-6361 .- 1432-0746. ; 637
  • Tidskriftsartikel (refereegranskat)
Abstract Ämnesord
Stäng  
  • Context. Low-mass protostars drive powerful molecular outflows that can be observed with millimetre and submillimetre telescopes. Various sulfuretted species are known to be bright in shocks and could be used to infer the physical and chemical conditions throughout the observed outflows. Aims. The evolution of sulfur chemistry is studied along the outflows driven by the NGC1333-IRAS4A protobinary system located in the Perseus cloud to constrain the physical and chemical processes at work in shocks. Methods. We observed various transitions from OCS, CS, SO, and SO2 towards NGC1333-IRAS4A in the 1.3, 2, and 3mm bands using the IRAM NOrthern Extended Millimeter Array and we interpreted the observations through the use of the Paris-Durham shock model. Results. The targeted species clearly show different spatial emission along the two outflows driven by IRAS4A. OCS is brighter on small and large scales along the south outflow driven by IRAS4A1, whereas SO2 is detected rather along the outflow driven by IRAS4A2 that is extended along the north east-south west direction. SO is detected at extremely high radial velocity up to +25 km s 1 relative to the source velocity, clearly allowing us to distinguish the two outflows on small scales. Column density ratio maps estimated from a rotational diagram analysis allowed us to confirm a clear gradient of the OCS/SO2 column density ratio between the IRAS4A1 and IRAS4A2 outflows. Analysis assuming non Local Thermodynamic Equilibrium of four SO2 transitions towards several SiO emission peaks suggests that the observed gas should be associated with densities higher than 105 cm 3 and relatively warm (T > 100 K) temperatures in most cases. Conclusions. The observed chemical differentiation between the two outflows of the IRAS4A system could be explained by a different chemical history. The outflow driven by IRAS4A1 is likely younger and more enriched in species initially formed in interstellar ices, such as OCS, and recently sputtered into the shock gas. In contrast, the longer and likely older outflow triggered by IRAS4A2 is more enriched in species that have a gas phase origin, such as SO2.

Ämnesord

NATURVETENSKAP  -- Fysik (hsv//swe)
NATURVETENSKAP  -- Geovetenskap och miljövetenskap (hsv//swe)
NATURAL SCIENCES  -- Physical Sciences (hsv//eng)
NATURAL SCIENCES  -- Earth and Related Environmental Sciences (hsv//eng)

Nyckelord

ISM: molecules
stars: formation
astrochemistry
ISM: individual objects: NGC1333-IRAS4A
ISM: jets and outflows
ISM: abundances

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