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  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., Codella, C., Simone, M. D., López-Sepulcre, A., Pineda, J. E., Segura-Cox, D., Ceccarelli, C., Caselli, P., Gusdorf, A., Persson, M. V., Alves, F., Caux, E., Favre, C., Fontani, F., Neri, R., Oya, Y., Sakai, N., Vastel, C., Yamamoto, S., Bachiller, R., Balucani, N., Bianchi, E., Bizzocchi, L., Chacón-Tanarro, A., Dulieu, F., Enrique-Romero, J., Feng, S., Holdship, J., Lefloch, B., Al-Edhari, A. J., Jiménez-Serra, I., Kahane, C., Lattanzi, V., Ospina-Zamudio, J., Podio, L., Punanova, A., Rimola, A., Sims, I. R., Spezzano, S., Testi, L., Theulé, P., Ugliengo, P., Vasyunin, A. I., Vazart, F., Viti, S., & Witzel, A. (2020). Seeds of Life in Space (SOLIS) - VI. Chemical evolution of sulfuretted species along the outflows driven by the low-mass protostellar binary NGC1333-IRAS4A. Astronomy and Astrophysics, 637:. doi:10.1051/0004-6361/201937072.

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アイテムのパーマリンク: https://hdl.handle.net/21.11116/0000-0006-C05B-B 版のパーマリンク: https://hdl.handle.net/21.11116/0000-0006-C05C-A
資料種別: 学術論文

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Seeds of Life in Space (SOLIS) - VI. Chemical evolution of sulfuretted species along the outflows driven by the low-mass protostellar binary NGC1333-IRAS4A.pdf (全文テキスト(全般)), 3MB
 
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Seeds of Life in Space (SOLIS) - VI. Chemical evolution of sulfuretted species along the outflows driven by the low-mass protostellar binary NGC1333-IRAS4A.pdf
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 作成者:
Taquet, V., 著者
Codella, C., 著者
Simone, M. De, 著者
López-Sepulcre, A., 著者
Pineda, J. E.1, 著者           
Segura-Cox, D.1, 著者           
Ceccarelli, C., 著者
Caselli, P.1, 著者           
Gusdorf, A., 著者
Persson, M. V., 著者
Alves, F.1, 著者           
Caux, E., 著者
Favre, C., 著者
Fontani, F., 著者
Neri, R., 著者
Oya, Y., 著者
Sakai, N., 著者
Vastel, C., 著者
Yamamoto, S., 著者
Bachiller, R., 著者
Balucani, N., 著者Bianchi, E., 著者Bizzocchi, L.1, 著者           Chacón-Tanarro, A., 著者Dulieu, F., 著者Enrique-Romero, J., 著者Feng, S., 著者Holdship, J., 著者Lefloch, B., 著者Al-Edhari, A. Jaber, 著者Jiménez-Serra, I., 著者Kahane, C., 著者Lattanzi, V.1, 著者           Ospina-Zamudio, J., 著者Podio, L., 著者Punanova, A., 著者Rimola, A., 著者Sims, I. R., 著者Spezzano, S.1, 著者           Testi, L., 著者Theulé, P., 著者Ugliengo, P., 著者Vasyunin, A. I., 著者Vazart, F., 著者Viti, S., 著者Witzel, A., 著者 全て表示
所属:
1Center for Astrochemical Studies at MPE, MPI for Extraterrestrial Physics, Max Planck Society, ou_1950287              

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 要旨: 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 NGC 1333-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 NGC 1333-IRAS4A in the 1.3, 2, and 3 mm 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.


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 日付: 2020-05-15
 出版の状態: オンラインで出版済み
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 査読: -
 識別子(DOI, ISBNなど): DOI: 10.1051/0004-6361/201937072
その他: LOCALID: 3244976
 学位: -

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出版物 1

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出版物名: Astronomy and Astrophysics
  その他 : Astron. Astrophys.
種別: 学術雑誌
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出版社, 出版地: France : EDP Sciences S A
ページ: - 巻号: 637 通巻号: A63 開始・終了ページ: - 識別子(ISBN, ISSN, DOIなど): ISSN: 1432-0746
CoNE: https://pure.mpg.de/cone/journals/resource/954922828219_1