Herschel/HIFI spectroscopy of the intermediate mass protostar NGC 7129 FIRS 2

D. Johnstone; M. Fich; C. McCoey; T. A. van Kempen; A. Fuente; L. E. Kristensen; J. Cernicharo; P. Caselli; R. Visser; R. Plume; G. J. Herczeg; E. F. van Dishoeck; S. Wampfler; R. Bachiller; A. Baudry; M. Benedettini; E. Bergin; A. O. Benz; P. Bjerkeli; G. Blake; S. Bontemps; J. Braine; S. Bruderer; C. Codella; F. Daniel; A. M. di Giorgio; C. Dominik; S. D. Doty; P. Encrenaz; T. Giannini; J. R. Goicoechea; Th. de Graauw; F. Helmich; F. Herpin; M. R. Hogerheijde; T. Jacq; Jes Kristian Jørgensen; B. Larsson; D. Lis; R. Liseau; M. Marseille; G. Melnick; D. Neufeld; B. Nisini; M. Olberg; B. Parise; J. Pearson; C. Risacher; J. Santiago-García; P. Saraceno; R. Shipman; M. Tafalla; F. van der Tak; F. Wyrowski; U. A. Yildiz; E. Caux; N. Honingh; W. Jellema; R. Schieder; D. Teyssier; N. Whyborn

Herschel/HIFI spectroscopy of the intermediate mass protostar NGC 7129 FIRS 2

D. Johnstone, M. Fich, C. McCoey, T. A. van Kempen, A. Fuente, L. E. Kristensen, J. Cernicharo, P. Caselli, R. Visser, R. Plume, G. J. Herczeg, E. F. van Dishoeck, S. Wampfler, R. Bachiller, A. Baudry, M. Benedettini, E. Bergin, A. O. Benz, P. Bjerkeli, G. BlakeS. Bontemps, J. Braine, S. Bruderer, C. Codella, F. Daniel, A. M. di Giorgio, C. Dominik, S. D. Doty, P. Encrenaz, T. Giannini, J. R. Goicoechea, Th. de Graauw, F. Helmich, F. Herpin, M. R. Hogerheijde, T. Jacq, Jes Kristian Jørgensen, B. Larsson, D. Lis, R. Liseau, M. Marseille, G. Melnick, D. Neufeld, B. Nisini, M. Olberg, B. Parise, J. Pearson, C. Risacher, J. Santiago-García, P. Saraceno, R. Shipman, M. Tafalla, F. van der Tak, F. Wyrowski, U. A. Yildiz, E. Caux, N. Honingh, W. Jellema, R. Schieder, D. Teyssier, N. Whyborn

The Cosmic Dawn Center

17 Citations (Scopus)

Abstract

Herschel/HIFI observations of water from the intermediate mass protostar NGC 7129 FIRS 2 provide a powerful diagnostic of the physical conditions in this star formation environment. Six spectral settings, covering four H ₂ ¹⁶O and two H₂ ¹⁸O lines, were observed and all but one H₂ ¹⁸O line were detected. The four H₂ ¹⁶O lines discussed here share a similar morphology: a narrower, ≈ 6 km s^-1, component centered slightly redward of the systemic velocity of NGC 7129 FIRS 2 and a much broader, ≈ 25 km s^-1 component centered blueward and likely associated with powerful outflows. The narrower components are consistent with emission from water arising in the envelope around the intermediate mass protostar, and the abundance of H₂O is constrained to ≈ 10^-7 for the outer envelope. Additionally, the presence of a narrow self-absorption component for the lowest energy lines is likely due to self-absorption from colder water in the outer envelope. The broader component, where the H₂O/CO relative abundance is found to be ≈ 0.2, appears to be tracing the same energetic region that produces strong CO emission at high J.

Original language	English
Journal	Astronomy & Astrophysics
Volume	521
Pages (from-to)	L41
ISSN	0004-6361
Publication status	Published - 1 Oct 2010

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Johnstone, D., Fich, M., McCoey, C., van Kempen, T. A., Fuente, A., Kristensen, L. E., Cernicharo, J., Caselli, P., Visser, R., Plume, R., Herczeg, G. J., van Dishoeck, E. F., Wampfler, S., Bachiller, R., Baudry, A., Benedettini, M., Bergin, E., Benz, A. O., Bjerkeli, P., ... Whyborn, N. (2010). Herschel/HIFI spectroscopy of the intermediate mass protostar NGC 7129 FIRS 2. Astronomy & Astrophysics, 521, L41.

Johnstone, D, Fich, M, McCoey, C, van Kempen, TA, Fuente, A, Kristensen, LE, Cernicharo, J, Caselli, P, Visser, R, Plume, R, Herczeg, GJ, van Dishoeck, EF, Wampfler, S, Bachiller, R, Baudry, A, Benedettini, M, Bergin, E, Benz, AO, Bjerkeli, P, Blake, G, Bontemps, S, Braine, J, Bruderer, S, Codella, C, Daniel, F, di Giorgio, AM, Dominik, C, Doty, SD, Encrenaz, P, Giannini, T, Goicoechea, JR, de Graauw, T, Helmich, F, Herpin, F, Hogerheijde, MR, Jacq, T, Jørgensen, JK, Larsson, B, Lis, D, Liseau, R, Marseille, M, Melnick, G, Neufeld, D, Nisini, B, Olberg, M, Parise, B, Pearson, J, Risacher, C, Santiago-García, J, Saraceno, P, Shipman, R, Tafalla, M, van der Tak, F, Wyrowski, F, Yildiz, UA, Caux, E, Honingh, N, Jellema, W, Schieder, R, Teyssier, D & Whyborn, N 2010, 'Herschel/HIFI spectroscopy of the intermediate mass protostar NGC 7129 FIRS 2', Astronomy & Astrophysics, vol. 521, pp. L41.

@article{5b04c363403d48f583f8e0f9cc92d7cb,

title = "Herschel/HIFI spectroscopy of the intermediate mass protostar NGC 7129 FIRS 2",

abstract = "Herschel/HIFI observations of water from the intermediate mass protostar NGC 7129 FIRS 2 provide a powerful diagnostic of the physical conditions in this star formation environment. Six spectral settings, covering four H 2 16O and two H2 18O lines, were observed and all but one H2 18O line were detected. The four H2 16O lines discussed here share a similar morphology: a narrower, ≈ 6 km s-1, component centered slightly redward of the systemic velocity of NGC 7129 FIRS 2 and a much broader, ≈ 25 km s-1 component centered blueward and likely associated with powerful outflows. The narrower components are consistent with emission from water arising in the envelope around the intermediate mass protostar, and the abundance of H2O is constrained to ≈ 10-7 for the outer envelope. Additionally, the presence of a narrow self-absorption component for the lowest energy lines is likely due to self-absorption from colder water in the outer envelope. The broader component, where the H2O/CO relative abundance is found to be ≈ 0.2, appears to be tracing the same energetic region that produces strong CO emission at high J.",

author = "D. Johnstone and M. Fich and C. McCoey and {van Kempen}, {T. A.} and A. Fuente and Kristensen, {L. E.} and J. Cernicharo and P. Caselli and R. Visser and R. Plume and Herczeg, {G. J.} and {van Dishoeck}, {E. F.} and S. Wampfler and R. Bachiller and A. Baudry and M. Benedettini and E. Bergin and Benz, {A. O.} and P. Bjerkeli and G. Blake and S. Bontemps and J. Braine and S. Bruderer and C. Codella and F. Daniel and {di Giorgio}, {A. M.} and C. Dominik and Doty, {S. D.} and P. Encrenaz and T. Giannini and Goicoechea, {J. R.} and {de Graauw}, Th. and F. Helmich and F. Herpin and Hogerheijde, {M. R.} and T. Jacq and J{\o}rgensen, {Jes Kristian} and B. Larsson and D. Lis and R. Liseau and M. Marseille and G. Melnick and D. Neufeld and B. Nisini and M. Olberg and B. Parise and J. Pearson and C. Risacher and J. Santiago-Garc{\'i}a and P. Saraceno and R. Shipman and M. Tafalla and {van der Tak}, F. and F. Wyrowski and Yildiz, {U. A.} and E. Caux and N. Honingh and W. Jellema and R. Schieder and D. Teyssier and N. Whyborn",

year = "2010",

month = oct,

day = "1",

language = "English",

volume = "521",

pages = "L41",

journal = "Astronomy and Astrophysics Supplement Series",

issn = "0004-6361",

publisher = "E D P Sciences",

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TY - JOUR

T1 - Herschel/HIFI spectroscopy of the intermediate mass protostar NGC 7129 FIRS 2

AU - Johnstone, D.

AU - Fich, M.

AU - McCoey, C.

AU - van Kempen, T. A.

AU - Fuente, A.

AU - Kristensen, L. E.

AU - Cernicharo, J.

AU - Caselli, P.

AU - Visser, R.

AU - Plume, R.

AU - Herczeg, G. J.

AU - van Dishoeck, E. F.

AU - Wampfler, S.

AU - Bachiller, R.

AU - Baudry, A.

AU - Benedettini, M.

AU - Bergin, E.

AU - Benz, A. O.

AU - Bjerkeli, P.

AU - Blake, G.

AU - Bontemps, S.

AU - Braine, J.

AU - Bruderer, S.

AU - Codella, C.

AU - Daniel, F.

AU - di Giorgio, A. M.

AU - Dominik, C.

AU - Doty, S. D.

AU - Encrenaz, P.

AU - Giannini, T.

AU - Goicoechea, J. R.

AU - de Graauw, Th.

AU - Helmich, F.

AU - Herpin, F.

AU - Hogerheijde, M. R.

AU - Jacq, T.

AU - Jørgensen, Jes Kristian

AU - Larsson, B.

AU - Lis, D.

AU - Liseau, R.

AU - Marseille, M.

AU - Melnick, G.

AU - Neufeld, D.

AU - Nisini, B.

AU - Olberg, M.

AU - Parise, B.

AU - Pearson, J.

AU - Risacher, C.

AU - Santiago-García, J.

AU - Saraceno, P.

AU - Shipman, R.

AU - Tafalla, M.

AU - van der Tak, F.

AU - Wyrowski, F.

AU - Yildiz, U. A.

AU - Caux, E.

AU - Honingh, N.

AU - Jellema, W.

AU - Schieder, R.

AU - Teyssier, D.

AU - Whyborn, N.

PY - 2010/10/1

Y1 - 2010/10/1

N2 - Herschel/HIFI observations of water from the intermediate mass protostar NGC 7129 FIRS 2 provide a powerful diagnostic of the physical conditions in this star formation environment. Six spectral settings, covering four H 2 16O and two H2 18O lines, were observed and all but one H2 18O line were detected. The four H2 16O lines discussed here share a similar morphology: a narrower, ≈ 6 km s-1, component centered slightly redward of the systemic velocity of NGC 7129 FIRS 2 and a much broader, ≈ 25 km s-1 component centered blueward and likely associated with powerful outflows. The narrower components are consistent with emission from water arising in the envelope around the intermediate mass protostar, and the abundance of H2O is constrained to ≈ 10-7 for the outer envelope. Additionally, the presence of a narrow self-absorption component for the lowest energy lines is likely due to self-absorption from colder water in the outer envelope. The broader component, where the H2O/CO relative abundance is found to be ≈ 0.2, appears to be tracing the same energetic region that produces strong CO emission at high J.

AB - Herschel/HIFI observations of water from the intermediate mass protostar NGC 7129 FIRS 2 provide a powerful diagnostic of the physical conditions in this star formation environment. Six spectral settings, covering four H 2 16O and two H2 18O lines, were observed and all but one H2 18O line were detected. The four H2 16O lines discussed here share a similar morphology: a narrower, ≈ 6 km s-1, component centered slightly redward of the systemic velocity of NGC 7129 FIRS 2 and a much broader, ≈ 25 km s-1 component centered blueward and likely associated with powerful outflows. The narrower components are consistent with emission from water arising in the envelope around the intermediate mass protostar, and the abundance of H2O is constrained to ≈ 10-7 for the outer envelope. Additionally, the presence of a narrow self-absorption component for the lowest energy lines is likely due to self-absorption from colder water in the outer envelope. The broader component, where the H2O/CO relative abundance is found to be ≈ 0.2, appears to be tracing the same energetic region that produces strong CO emission at high J.

M3 - Journal article

SN - 0004-6361

VL - 521

SP - L41

JO - Astronomy and Astrophysics Supplement Series

JF - Astronomy and Astrophysics Supplement Series

ER -

Herschel/HIFI spectroscopy of the intermediate mass protostar NGC 7129 FIRS 2

Abstract

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