Herschel/HIFI spectroscopy of the intermediate mass protostar NGC7129 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; J. K. 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. Yıldız; E. Caux; N. Honingh; W. Jellema; R. Schieder; D. Teyssier; N. Whyborn

doi:10.1051/0004-6361/201015122

Herschel/HIFI spectroscopy of the intermediate mass protostar NGC7129 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, J. K. 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. Yıldız, E. Caux, N. Honingh, W. Jellema, R. Schieder, D. Teyssier, N. Whyborn

^*Corresponding author for this work

Astronomy

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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 (H2O)-O-16 and two (H2O)-O-18 lines, were observed and all but one (H2O)-O-18 line were detected. The four (H2O)-O-16 lines discussed here share a similar morphology: a narrower, approximate to 6kms(-1), component centered slightly redward of the systemic velocity of NGC7129 FIRS 2 and a much broader, approximate to 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 approximate 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 approximate to 0.2, appears to be tracing the same energetic region that produces strong CO emission at high J.

Original language	English
Article number	L41
Number of pages	6
Journal	Astronomy & Astrophysics
Volume	521
DOIs	https://doi.org/10.1051/0004-6361/201015122
Publication status	Published - Oct-2010

Keywords

astrochemistry
stars: formation
STAR-FORMING REGIONS
YOUNG STELLAR OBJECTS
PACS SPECTROSCOPY
HH 46
WATER
HIFI
EXCITATION
EVOLUTION

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http://adsabs.harvard.edu/abs/2010A%26A...521L..41J

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Herschel-HIFI spectroscopy of the intermediate mass protostar NGC7129 FIRS 2
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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 NGC7129 FIRS 2. Astronomy & Astrophysics, 521, Article L41. https://doi.org/10.1051/0004-6361/201015122

@article{eeb706e83797471fabdf785d596c59cf,

title = "Herschel/HIFI spectroscopy of the intermediate mass protostar NGC7129 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 (H2O)-O-16 and two (H2O)-O-18 lines, were observed and all but one (H2O)-O-18 line were detected. The four (H2O)-O-16 lines discussed here share a similar morphology: a narrower, approximate to 6kms(-1), component centered slightly redward of the systemic velocity of NGC7129 FIRS 2 and a much broader, approximate to 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 approximate 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 approximate to 0.2, appears to be tracing the same energetic region that produces strong CO emission at high J.",

keywords = "astrochemistry, stars: formation, STAR-FORMING REGIONS, YOUNG STELLAR OBJECTS, PACS SPECTROSCOPY, HH 46, WATER, HIFI, EXCITATION, EVOLUTION",

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, {J. K.} 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 Yıldız, {U. A.} and E. Caux and N. Honingh and W. Jellema and R. Schieder and D. Teyssier and N. Whyborn",

note = "M1 - Journal Article",

year = "2010",

month = oct,

doi = "10.1051/0004-6361/201015122",

language = "English",

volume = "521",

journal = "Astronomy & Astrophysics",

issn = "0004-6361",

publisher = " EDP Sciences",

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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, Yıldız, UA, Caux, E, Honingh, N, Jellema, W, Schieder, R, Teyssier, D & Whyborn, N 2010, 'Herschel/HIFI spectroscopy of the intermediate mass protostar NGC7129 FIRS 2', Astronomy & Astrophysics, vol. 521, L41. https://doi.org/10.1051/0004-6361/201015122

TY - JOUR

T1 - Herschel/HIFI spectroscopy of the intermediate mass protostar NGC7129 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, J. K.

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 - Yıldız, U. A.

AU - Caux, E.

AU - Honingh, N.

AU - Jellema, W.

AU - Schieder, R.

AU - Teyssier, D.

AU - Whyborn, N.

N1 - M1 - Journal Article

PY - 2010/10

Y1 - 2010/10

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 (H2O)-O-16 and two (H2O)-O-18 lines, were observed and all but one (H2O)-O-18 line were detected. The four (H2O)-O-16 lines discussed here share a similar morphology: a narrower, approximate to 6kms(-1), component centered slightly redward of the systemic velocity of NGC7129 FIRS 2 and a much broader, approximate to 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 approximate 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 approximate to 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 (H2O)-O-16 and two (H2O)-O-18 lines, were observed and all but one (H2O)-O-18 line were detected. The four (H2O)-O-16 lines discussed here share a similar morphology: a narrower, approximate to 6kms(-1), component centered slightly redward of the systemic velocity of NGC7129 FIRS 2 and a much broader, approximate to 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 approximate 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 approximate to 0.2, appears to be tracing the same energetic region that produces strong CO emission at high J.

KW - astrochemistry

KW - stars: formation

KW - STAR-FORMING REGIONS

KW - YOUNG STELLAR OBJECTS

KW - PACS SPECTROSCOPY

KW - HH 46

KW - WATER

KW - HIFI

KW - EXCITATION

KW - EVOLUTION

U2 - 10.1051/0004-6361/201015122

DO - 10.1051/0004-6361/201015122

M3 - Article

SN - 0004-6361

VL - 521

JO - Astronomy & Astrophysics

JF - Astronomy & Astrophysics

M1 - L41

ER -

Herschel/HIFI spectroscopy of the intermediate mass protostar NGC7129 FIRS 2

Abstract

Keywords

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